linux-2.6-microblaze.git
4 years agoMerge tag 'tegra-for-5.6-memory' of git://git.kernel.org/pub/scm/linux/kernel/git...
Olof Johansson [Thu, 16 Jan 2020 18:41:47 +0000 (10:41 -0800)]
Merge tag 'tegra-for-5.6-memory' of git://git./linux/kernel/git/tegra/linux into arm/drivers

memory: tegra: Changes for v5.6-rc1

This adds a couple of fixes for the Tegra30 EMC frequency scaling code
and adds support for EMC frequency scaling on Tegra186 and later.

* tag 'tegra-for-5.6-memory' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  memory: tegra30-emc: Correct error message for timed out auto calibration
  memory: tegra30-emc: Firm up hardware programming sequence
  memory: tegra30-emc: Firm up suspend/resume sequence
  memory: tegra: Correct reset value of xusb_hostr
  memory: tegra: Add support for the Tegra194 memory controller
  memory: tegra: Only include support for enabled SoCs
  memory: tegra: Support DVFS on Tegra186 and later
  memory: tegra: Add system sleep support
  memory: tegra: Extract memory client SID programming
  memory: tegra: Add per-SoC data for Tegra186
  memory: tegra: Rename tegra_mc to tegra186_mc on Tegra186
  memory: tegra: Implement EMC debugfs interface on Tegra30
  memory: tegra: Implement EMC debugfs interface on Tegra20
  memory: tegra: Refashion EMC debugfs interface on Tegra124

Link: https://lore.kernel.org/r/20200111003553.2411874-3-thierry.reding@gmail.com
Signed-off-by: Olof Johansson <olof@lixom.net>
4 years agoMerge tag 'tegra-for-5.6-bus' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra...
Olof Johansson [Thu, 16 Jan 2020 18:40:21 +0000 (10:40 -0800)]
Merge tag 'tegra-for-5.6-bus' of git://git./linux/kernel/git/tegra/linux into arm/drivers

bus: tegra: Changes for v5.6-rc1

Contains a single fix to remove a Kconfig dependency that's no longer
required.

* tag 'tegra-for-5.6-bus' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  bus: tegra-aconnect: Remove PM_CLK dependency

Link: https://lore.kernel.org/r/20200111003553.2411874-2-thierry.reding@gmail.com
Signed-off-by: Olof Johansson <olof@lixom.net>
4 years agoMerge tag 'samsung-drivers-5.6' of https://git.kernel.org/pub/scm/linux/kernel/git...
Olof Johansson [Sat, 11 Jan 2020 06:27:09 +0000 (22:27 -0800)]
Merge tag 'samsung-drivers-5.6' of https://git./linux/kernel/git/krzk/linux into arm/drivers

Samsung soc drivers changes for v5.6

1. Convert to managed (devm_x()) versions,
2. Cleanups (Samsung and Exynos names).

* tag 'samsung-drivers-5.6' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
  memory: samsung: Rename Exynos to lowercase
  soc: samsung: Rename Samsung and Exynos to lowercase
  memory: samsung: exynos5422-dmc: Convert to devm_platform_ioremap_resource
  soc: samsung: exynos-pmu: Convert to devm_platform_ioremap_resource

Link: https://lore.kernel.org/r/20200110172334.4767-2-krzk@kernel.org
Signed-off-by: Olof Johansson <olof@lixom.net>
4 years agoMerge tag 'reset-for-5.6' of git://git.pengutronix.de/pza/linux into arm/drivers
Olof Johansson [Sat, 11 Jan 2020 06:20:36 +0000 (22:20 -0800)]
Merge tag 'reset-for-5.6' of git://git.pengutronix.de/pza/linux into arm/drivers

Reset controller updates for v5.6

This tag adds support for the Nuvoton NPCM, Intel Gatway SoC, and
Broadcom BCM7216 RESCAL reset controllers, adds missing SCSSI reset
controls for newer Uniphier SoCs, aligns the program flow in the
devm_reset_controller_register, __devm_reset_control_get, and
devm_reset_control_array_get functions for better consistency,
and allows to build the Qcom AOSS reset driver as a module.

This is based on v5.5-rc3 because the core patch depends on commit
db23808615e2 ("reset: Do not register resource data for missing
resets").

* tag 'reset-for-5.6' of git://git.pengutronix.de/pza/linux:
  reset: qcom-aoss: Allow CONFIG_RESET_QCOM_AOSS to be a tristate
  reset: Add Broadcom STB RESCAL reset controller
  dt-bindings: reset: Document BCM7216 RESCAL reset controller
  reset: intel: Add system reset controller driver
  dt-bindings: reset: Add YAML schemas for the Intel Reset controller
  reset: uniphier: Add SCSSI reset control for each channel
  reset: Align logic and flow in managed helpers
  reset: npcm: add NPCM reset controller driver
  dt-bindings: reset: Add binding constants for NPCM7xx reset controller
  dt-bindings: reset: add NPCM reset controller documentation

Link: https://lore.kernel.org/r/dbbb2ca7490a0146d9ba632fd4d9f38063e03e9f.camel@pengutronix.de
Signed-off-by: Olof Johansson <olof@lixom.net>
4 years agoMerge tag 'arm-soc/for-5.6/drivers' of https://github.com/Broadcom/stblinux into...
Olof Johansson [Sat, 11 Jan 2020 06:15:25 +0000 (22:15 -0800)]
Merge tag 'arm-soc/for-5.6/drivers' of https://github.com/Broadcom/stblinux into arm/drivers

This pull request contains Broadcom ARM/ARM64/MIPS-based SoCs drivers
changes for 5.6, please pull the following:

- Florian provides a set of updates to the Bus Interface Unit control to
  tune it appropriately for the most recent chips: 7255, 7260, 7216, 7211

* tag 'arm-soc/for-5.6/drivers' of https://github.com/Broadcom/stblinux:
  soc: bcm: brcmstb: biuctrl: Update programming for 7211
  soc: bcm: brcmstb: biuctrl: Update layout for A72 on 7211
  soc: bcm: brcmstb: biuctrl: Tune interface for 7255 and 7216
  soc: bcm: brcmstb: biuctrl: Tune 7260 BIU interface

Link: https://lore.kernel.org/r/20200108191114.15987-2-f.fainelli@gmail.com
Signed-off-by: Olof Johansson <olof@lixom.net>
4 years agomemory: tegra30-emc: Correct error message for timed out auto calibration
Dmitry Osipenko [Fri, 20 Dec 2019 02:08:49 +0000 (05:08 +0300)]
memory: tegra30-emc: Correct error message for timed out auto calibration

The code waits for auto calibration to be finished and not to be disabled.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
4 years agomemory: tegra30-emc: Firm up hardware programming sequence
Dmitry Osipenko [Fri, 20 Dec 2019 02:08:48 +0000 (05:08 +0300)]
memory: tegra30-emc: Firm up hardware programming sequence

Previously there was a problem where a late handshake handling caused
a memory corruption, this problem was resolved by issuing calibration
command right after changing the timing, but looks like the solution
wasn't entirely correct since calibration interval could be disabled as
well. Now programming sequence is completed immediately after receiving
handshake from CaR, without potentially long delays and in accordance to
the TRM's programming guide.

Secondly, the TRM's programming guide suggests to flush EMC writes by
reading any *MC* register before doing CaR changes. This is also addressed
now.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
4 years agomemory: tegra30-emc: Firm up suspend/resume sequence
Dmitry Osipenko [Fri, 20 Dec 2019 02:08:47 +0000 (05:08 +0300)]
memory: tegra30-emc: Firm up suspend/resume sequence

The current code doesn't prevent race conditions of suspend/resume vs CCF.
Let's take exclusive control over the EMC clock during suspend in a way
that is free from race conditions.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
4 years agomemory: tegra: Correct reset value of xusb_hostr
Nicolin Chen [Fri, 20 Dec 2019 00:29:11 +0000 (16:29 -0800)]
memory: tegra: Correct reset value of xusb_hostr

According to Tegra X1 (Tegra210) TRM, the reset value of xusb_hostr
field (bit [7:0]) should be 0x7a. So this patch simply corrects it.

Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
4 years agobus: tegra-aconnect: Remove PM_CLK dependency
Sameer Pujar [Thu, 20 Jun 2019 15:51:59 +0000 (21:21 +0530)]
bus: tegra-aconnect: Remove PM_CLK dependency

The ACONNECT bus driver does not use pm-clk interface anymore and hence
the dependency can be removed from its Kconfig option.

Fixes: 0d7dab926130 ("bus: tegra-aconnect: use devm_clk_*() helpers")
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
4 years agomemory: tegra: Add support for the Tegra194 memory controller
Thierry Reding [Sun, 22 Dec 2019 14:10:32 +0000 (15:10 +0100)]
memory: tegra: Add support for the Tegra194 memory controller

The memory and external memory controllers on Tegra194 are very similar
to their predecessors from Tegra186. Add the necessary SoC-specific data
to support the newer versions.

Signed-off-by: Thierry Reding <treding@nvidia.com>
4 years agomemory: tegra: Only include support for enabled SoCs
Thierry Reding [Sun, 22 Dec 2019 14:10:31 +0000 (15:10 +0100)]
memory: tegra: Only include support for enabled SoCs

The memory client tables can be fairly large and they can easily be
omitted if support for the corresponding SoC is not enabled.

Signed-off-by: Thierry Reding <treding@nvidia.com>
4 years agomemory: tegra: Support DVFS on Tegra186 and later
Thierry Reding [Sun, 22 Dec 2019 14:10:30 +0000 (15:10 +0100)]
memory: tegra: Support DVFS on Tegra186 and later

Add a Tegra186 (and later) EMC driver that reads the EMC DVFS tables
from BPMP and uses the EMC clock to change the external memory clock.

This currently only provides a debugfs interface to show the available
frequencies and set lower and upper limits of the allowed range. This
can be used for testing the various frequencies. The goal is to
eventually integrate this with the interconnect framework so that the
EMC frequency can be scaled based on demand from memory clients.

Signed-off-by: Thierry Reding <treding@nvidia.com>
4 years agomemory: tegra: Add system sleep support
Thierry Reding [Sun, 22 Dec 2019 14:10:29 +0000 (15:10 +0100)]
memory: tegra: Add system sleep support

Add system suspend/resume support for the memory controller found on
Tegra186 and later. This is required so that the SID registers can be
reprogrammed after their content was lost during system sleep.

Signed-off-by: Thierry Reding <treding@nvidia.com>
4 years agomemory: tegra: Extract memory client SID programming
Thierry Reding [Sun, 22 Dec 2019 14:10:28 +0000 (15:10 +0100)]
memory: tegra: Extract memory client SID programming

Move programming of the memory client to SID mapping into a separate
function so that it can be reused from multiple call sites.

Signed-off-by: Thierry Reding <treding@nvidia.com>
4 years agomemory: tegra: Add per-SoC data for Tegra186
Thierry Reding [Sun, 22 Dec 2019 14:10:27 +0000 (15:10 +0100)]
memory: tegra: Add per-SoC data for Tegra186

Instead of hard-coding the memory client table, use per-SoC data in
preparation for adding support for other SoCs.

Signed-off-by: Thierry Reding <treding@nvidia.com>
4 years agomemory: tegra: Rename tegra_mc to tegra186_mc on Tegra186
Thierry Reding [Sun, 22 Dec 2019 14:10:26 +0000 (15:10 +0100)]
memory: tegra: Rename tegra_mc to tegra186_mc on Tegra186

This is just for consistency with the rest of the driver.

Signed-off-by: Thierry Reding <treding@nvidia.com>
4 years agomemory: tegra: Implement EMC debugfs interface on Tegra30
Thierry Reding [Sun, 22 Dec 2019 11:40:33 +0000 (12:40 +0100)]
memory: tegra: Implement EMC debugfs interface on Tegra30

A common debugfs interface is already available on Tegra20, Tegra124,
Tegra186 and Tegra194. Implement the same interface on Tegra30 to enable
testing of the EMC frequency scaling code using a unified interface.

Signed-off-by: Thierry Reding <treding@nvidia.com>
4 years agomemory: tegra: Implement EMC debugfs interface on Tegra20
Thierry Reding [Sun, 22 Dec 2019 11:40:32 +0000 (12:40 +0100)]
memory: tegra: Implement EMC debugfs interface on Tegra20

A common debugfs interface is already available on Tegra124, Tegra186
and Tegra194. Implement the same interface on Tegra20 to enable testing
of the EMC frequency scaling code using a unified interface.

Signed-off-by: Thierry Reding <treding@nvidia.com>
4 years agomemory: tegra: Refashion EMC debugfs interface on Tegra124
Thierry Reding [Sun, 22 Dec 2019 11:39:17 +0000 (12:39 +0100)]
memory: tegra: Refashion EMC debugfs interface on Tegra124

The current debugfs interface is only partially useful. While it allows
listing supported frequencies and testing individual clock rates, it is
limited in that it can't be used to restrict the range of frequencies
that the driver is allowed to set. This is something we may want to use
to test adaptive scaling once that's implemented.

Signed-off-by: Thierry Reding <treding@nvidia.com>
4 years agoMerge tag 'cpuidle_psci-v5.5-rc4' of git://git.linaro.org/people/ulf.hansson/linux...
Olof Johansson [Wed, 8 Jan 2020 18:26:26 +0000 (10:26 -0800)]
Merge tag 'cpuidle_psci-v5.5-rc4' of git://git.linaro.org/people/ulf.hansson/linux-pm into arm/drivers

Initial support for hierarchical CPU arrangement, managed by PSCI and its
corresponding cpuidle driver. This support is based upon using the generic
PM domain, which already supports devices belonging to CPUs.

Finally, these is a DTS patch that enables the hierarchical topology to be
used for the Qcom 410c Dragonboard, which supports the PSCI OS-initiated
mode.

* tag 'cpuidle_psci-v5.5-rc4' of git://git.linaro.org/people/ulf.hansson/linux-pm: (611 commits)
  arm64: dts: Convert to the hierarchical CPU topology layout for MSM8916
  cpuidle: psci: Add support for PM domains by using genpd
  PM / Domains: Introduce a genpd OF helper that removes a subdomain
  cpuidle: psci: Support CPU hotplug for the hierarchical model
  cpuidle: psci: Manage runtime PM in the idle path
  cpuidle: psci: Prepare to use OS initiated suspend mode via PM domains
  cpuidle: psci: Attach CPU devices to their PM domains
  cpuidle: psci: Add a helper to attach a CPU to its PM domain
  cpuidle: psci: Support hierarchical CPU idle states
  cpuidle: psci: Simplify OF parsing of CPU idle state nodes
  cpuidle: dt: Support hierarchical CPU idle states
  of: base: Add of_get_cpu_state_node() to get idle states for a CPU node
  firmware: psci: Export functions to manage the OSI mode
  dt: psci: Update DT bindings to support hierarchical PSCI states
  cpuidle: psci: Align psci_power_state count with idle state count
  Linux 5.5-rc4
  locks: print unsigned ino in /proc/locks
  riscv: export flush_icache_all to modules
  riscv: reject invalid syscalls below -1
  riscv: fix compile failure with EXPORT_SYMBOL() & !MMU
  ...

Link: https://lore.kernel.org/r/20200102160820.3572-1-ulf.hansson@linaro.org
Signed-off-by: Olof Johansson <olof@lixom.net>
4 years agoreset: qcom-aoss: Allow CONFIG_RESET_QCOM_AOSS to be a tristate
John Stultz [Wed, 8 Jan 2020 00:19:13 +0000 (00:19 +0000)]
reset: qcom-aoss: Allow CONFIG_RESET_QCOM_AOSS to be a tristate

Allow CONFIG_RESET_QCOM_AOSS to be set as as =m to allow for the
driver to be loaded from a modules.

Also replaces the builtin_platform_driver() line with
module_platform_driver() and adds a MODULE_DEVICE_TABLE() entry.

Cc: Todd Kjos <tkjos@google.com>
Cc: Alistair Delva <adelva@google.com>
Cc: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
4 years agomemory: samsung: Rename Exynos to lowercase
Krzysztof Kozlowski [Sat, 4 Jan 2020 15:20:56 +0000 (16:20 +0100)]
memory: samsung: Rename Exynos to lowercase

Fix up inconsistent usage of upper and lowercase letters in "Exynos"
name.

"EXYNOS" is not an abbreviation but a regular trademarked name.
Therefore it should be written with lowercase letters starting with
capital letter.

The lowercase "Exynos" name is promoted by its manufacturer Samsung
Electronics Co., Ltd., in advertisement materials and on website.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
4 years agosoc: samsung: Rename Samsung and Exynos to lowercase
Krzysztof Kozlowski [Sat, 4 Jan 2020 15:20:52 +0000 (16:20 +0100)]
soc: samsung: Rename Samsung and Exynos to lowercase

Fix up inconsistent usage of upper and lowercase letters in "Samsung"
and "Exynos" names.

"SAMSUNG" and "EXYNOS" are not abbreviations but regular trademarked
names.  Therefore they should be written with lowercase letters starting
with capital letter.

The lowercase "Exynos" name is promoted by its manufacturer Samsung
Electronics Co., Ltd., in advertisement materials and on website.

Although advertisement materials usually use uppercase "SAMSUNG", the
lowercase version is used in all legal aspects (e.g. on Wikipedia and in
privacy/legal statements on
https://www.samsung.com/semiconductor/privacy-global/).

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
4 years agoMerge tag 'renesas-drivers-for-v5.6-tag1' of git://git.kernel.org/pub/scm/linux/kerne...
Olof Johansson [Mon, 6 Jan 2020 17:29:13 +0000 (09:29 -0800)]
Merge tag 'renesas-drivers-for-v5.6-tag1' of git://git./linux/kernel/git/geert/renesas-devel into arm/drivers

Renesas driver updates for v5.6

  - Remove now unused ARCH_R8A7796 config symbol,
  - Fix a sparse warning,
  - Add split R-Car H3 ES1.x and ES2.0+ config symbols.

* tag 'renesas-drivers-for-v5.6-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel:
  soc: renesas: Add ARCH_R8A7795[01] for existing R-Car H3
  soc: renesas: rcar-rst: Fix __iomem on configure call
  soc: renesas: Remove ARCH_R8A7796

Link: https://lore.kernel.org/r/20200106104857.8361-5-geert+renesas@glider.be
Signed-off-by: Olof Johansson <olof@lixom.net>
4 years agoMerge tag 'tee-optee-pldrv-for-5.6' of git://git.linaro.org:/people/jens.wiklander...
Olof Johansson [Mon, 6 Jan 2020 17:26:27 +0000 (09:26 -0800)]
Merge tag 'tee-optee-pldrv-for-5.6' of git://git.linaro.org:/people/jens.wiklander/linux-tee into arm/drivers

Model OP-TEE as a platform device/driver

* tag 'tee-optee-pldrv-for-5.6' of git://git.linaro.org:/people/jens.wiklander/linux-tee:
  optee: model OP-TEE as a platform device/driver

Link: https://lore.kernel.org/r/20200103090025.GA11243@jax
Signed-off-by: Olof Johansson <olof@lixom.net>
4 years agoMerge tag 'scmi-updates-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep...
Olof Johansson [Mon, 6 Jan 2020 17:23:04 +0000 (09:23 -0800)]
Merge tag 'scmi-updates-5.6' of git://git./linux/kernel/git/sudeep.holla/linux into arm/drivers

ARM SCMI updates for v5.6

1. Addition of multiple device support per protocol to enable use of
   some procotols by multiple kernel subsystems simultaneously and
   corresponding updates to the existing scmi drivers
2. Addition of trace events around the scmi transfer code to measure
   any delays and capture anomalies that can also be used during
   investigation of some platform firmware related issues

* tag 'scmi-updates-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
  drivers: firmware: scmi: Extend SCMI transport layer by trace events
  include: trace: Add SCMI header with trace events
  reset: reset-scmi: Match scmi device by both name and protocol id
  hwmon: (scmi-hwmon) Match scmi device by both name and protocol id
  cpufreq: scmi: Match scmi device by both name and protocol id
  clk: scmi: Match scmi device by both name and protocol id
  firmware: arm_scmi: Skip protocol initialisation for additional devices
  firmware: arm_scmi: Stash version in protocol init functions
  firmware: arm_scmi: Match scmi device by both name and protocol id
  firmware: arm_scmi: Add versions and identifier attributes using dev_groups
  firmware: arm_scmi: Add names to scmi devices created
  firmware: arm_scmi: Skip scmi mbox channel setup for addtional devices
  firmware: arm_scmi: Add support for multiple device per protocol

Link: https://lore.kernel.org/r/20191230182956.GA29349@bogus
Signed-off-by: Olof Johansson <olof@lixom.net>
4 years agosoc: renesas: Add ARCH_R8A7795[01] for existing R-Car H3
Geert Uytterhoeven [Tue, 17 Dec 2019 18:38:41 +0000 (19:38 +0100)]
soc: renesas: Add ARCH_R8A7795[01] for existing R-Car H3

Despite using the same compatible values ("r8a7795"-based) because of
historical reasons, R-Car H3 ES1.x (R8A77950) and R-Car H3 ES2.0+
(R8A77951) are really different SoCs, with different part numbers.

Reflect this in the SoC configuration, by adding CONFIG_ARCH_R8A77950
and CONFIG_ARCH_R8A77951 as new config symbols.  These are intended to
replace CONFIG_ARCH_R8A7795, and will allow making support for early SoC
revisions optional.

Note that for now, CONFIG_ARCH_R8A7795 is retained, and just selects
CONFIG_ARCH_R8A77950 and CONFIG_ARCH_R8A77951.  This relaxes
dependencies of other subsystems on the SoC configuration symbol, and
provides a smooth transition path for config files through "make
oldconfig".

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20191217183841.432-6-geert+renesas@glider.be
4 years agosoc: renesas: rcar-rst: Fix __iomem on configure call
Ben Dooks (Codethink) [Wed, 18 Dec 2019 13:52:30 +0000 (13:52 +0000)]
soc: renesas: rcar-rst: Fix __iomem on configure call

The configure call back takes a register pointer, so should
have been marked with __iomem. Add this to silence the
following sparse warnings:

    drivers/soc/renesas/rcar-rst.c:33:22: warning: incorrect type in initializer (incompatible argument 1 (different address spaces))
    drivers/soc/renesas/rcar-rst.c:33:22:    expected int ( *configure )( ... )
    drivers/soc/renesas/rcar-rst.c:33:22:    got int ( * )( ... )
    drivers/soc/renesas/rcar-rst.c:97:40: warning: incorrect type in argument 1 (different address spaces)
    drivers/soc/renesas/rcar-rst.c:97:40:    expected void *base
    drivers/soc/renesas/rcar-rst.c:97:40:    got void [noderef] <asn:2> *[assigned] base

Signed-off-by: Ben Dooks (Codethink) <ben.dooks@codethink.co.uk>
Link: https://lore.kernel.org/r/20191218135230.2610161-1-ben.dooks@codethink.co.uk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
4 years agoreset: Add Broadcom STB RESCAL reset controller
Jim Quinlan [Fri, 3 Jan 2020 19:04:29 +0000 (11:04 -0800)]
reset: Add Broadcom STB RESCAL reset controller

On BCM7216 there is a special purpose reset controller named RESCAL
(reset calibration) which is necessary for SATA and PCIe0/1 to operate
correctly. This commit adds support for such a reset controller to be
available.

Signed-off-by: Jim Quinlan <jim2101024@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
4 years agodt-bindings: reset: Document BCM7216 RESCAL reset controller
Jim Quinlan [Fri, 3 Jan 2020 19:04:28 +0000 (11:04 -0800)]
dt-bindings: reset: Document BCM7216 RESCAL reset controller

BCM7216 has a special purpose RESCAL reset controller for its SATA and
PCIe0/1 instances. This is a simple reset controller with #reset-cells
set to 0.

Signed-off-by: Jim Quinlan <jim2101024@gmail.com>
[florian: Convert to YAML binding]
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
4 years agosoc: bcm: brcmstb: biuctrl: Update programming for 7211
Florian Fainelli [Sun, 7 Apr 2019 21:40:50 +0000 (14:40 -0700)]
soc: bcm: brcmstb: biuctrl: Update programming for 7211

Add a matching entry for 7211 which can be programmed with the same
BIUCTRL settings as other Brahma-B53 based SoCs. While at it, rename the
function to include a72 in the name to reflect this applies to both
types of 64-bit capable CPUs that we support (Brahma-B53 and
Cortex-A72).

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
4 years agosoc: bcm: brcmstb: biuctrl: Update layout for A72 on 7211
Florian Fainelli [Tue, 2 Apr 2019 03:03:32 +0000 (20:03 -0700)]
soc: bcm: brcmstb: biuctrl: Update layout for A72 on 7211

The BIUCTRL layout is a little different on 7211 which is equipped with
a Cortex-A72, account for those register offset differences. We will
match 7211 specifically in a subsequent commit.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
4 years agosoc: bcm: brcmstb: biuctrl: Tune interface for 7255 and 7216
Florian Fainelli [Tue, 10 Dec 2019 23:05:26 +0000 (15:05 -0800)]
soc: bcm: brcmstb: biuctrl: Tune interface for 7255 and 7216

7255 and 7216 are some of the latest chips that were produced and
support the full register range configuration for the BIU, add the two
entries to get the expected programming.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
4 years agosoc: bcm: brcmstb: biuctrl: Tune 7260 BIU interface
Florian Fainelli [Tue, 10 Dec 2019 22:57:58 +0000 (14:57 -0800)]
soc: bcm: brcmstb: biuctrl: Tune 7260 BIU interface

7260A0 and B0 are both supported, and 7260A0 has a small difference in
that it does not support the write-back control register, which is why
we have a different array of registers. Update the comment above
b53_cpubiuctrl_no_wb_regs to denote that difference.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
4 years agoreset: intel: Add system reset controller driver
Dilip Kota [Fri, 3 Jan 2020 10:00:18 +0000 (18:00 +0800)]
reset: intel: Add system reset controller driver

Add driver for the reset controller present on Intel
Gateway SoCs for performing reset management of the
devices present on the SoC. Driver also registers a
reset handler to peform the entire device reset.

Signed-off-by: Dilip Kota <eswara.kota@linux.intel.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
4 years agodt-bindings: reset: Add YAML schemas for the Intel Reset controller
Dilip Kota [Fri, 3 Jan 2020 10:00:17 +0000 (18:00 +0800)]
dt-bindings: reset: Add YAML schemas for the Intel Reset controller

Add YAML schemas for the reset controller on Intel
Gateway SoC.

Signed-off-by: Dilip Kota <eswara.kota@linux.intel.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
4 years agooptee: model OP-TEE as a platform device/driver
Ard Biesheuvel [Mon, 9 Dec 2019 14:59:28 +0000 (15:59 +0100)]
optee: model OP-TEE as a platform device/driver

To simplify adding ACPI support to the OP-TEE driver, model it as
a platform driver. This will permit us to use the generic device
property layer for parsing additional properties, regardless of
whether DT or ACPI is being used.

Note that this change will result in the OP-TEE driver to be loaded
automatically on systems that advertise the presence of OP-TEE via
the device tree.

Acked-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
4 years agoarm64: dts: Convert to the hierarchical CPU topology layout for MSM8916
Ulf Hansson [Thu, 10 Oct 2019 10:01:48 +0000 (12:01 +0200)]
arm64: dts: Convert to the hierarchical CPU topology layout for MSM8916

To enable the OS to better support PSCI OS initiated CPU suspend mode,
let's convert from the flattened layout to the hierarchical layout.

In the hierarchical layout, let's create a power domain provider per CPU
and describe the idle states for each CPU inside the power domain provider
node. To group the CPUs into a cluster, let's add another power domain
provider and make it act as the master domain. Note that, the CPU's idle
states remains compatible with "arm,idle-state", while the cluster's idle
state becomes compatible with "domain-idle-state".

Co-developed-by: Lina Iyer <lina.iyer@linaro.org>
Signed-off-by: Lina Iyer <lina.iyer@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
4 years agocpuidle: psci: Add support for PM domains by using genpd
Ulf Hansson [Thu, 10 Oct 2019 10:01:48 +0000 (12:01 +0200)]
cpuidle: psci: Add support for PM domains by using genpd

When the hierarchical CPU topology layout is used in DT and the PSCI OSI
mode is supported by the PSCI FW, let's initialize a corresponding PM
domain topology by using genpd. This enables a CPU and a group of CPUs,
when attached to the topology, to be power-managed accordingly.

To trigger the attempt to initialize the genpd data structures let's use a
subsys_initcall, which should be early enough to allow CPUs, but also other
devices to be attached.

The initialization consists of parsing the PSCI OF node for the topology
and the "domain idle states" DT bindings. In case the idle states are
compatible with "domain-idle-state", the initialized genpd becomes
responsible of selecting an idle state for the PM domain, via assigning it
a genpd governor.

Note that, a successful initialization of the genpd data structures, is
followed by a call to psci_set_osi_mode(), as to try to enable the OSI mode
in the PSCI FW. In case this fails, we fall back into a degraded mode
rather than bailing out and returning error codes.

Co-developed-by: Lina Iyer <lina.iyer@linaro.org>
Signed-off-by: Lina Iyer <lina.iyer@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
4 years agoPM / Domains: Introduce a genpd OF helper that removes a subdomain
Ulf Hansson [Mon, 30 Dec 2019 12:59:30 +0000 (13:59 +0100)]
PM / Domains: Introduce a genpd OF helper that removes a subdomain

We already have the of_genpd_add_subdomain() helper, but no corresponding
of_genpd_remove_subdomain(), so let's add it. Subsequent changes starts to
make use of it.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
4 years agocpuidle: psci: Support CPU hotplug for the hierarchical model
Ulf Hansson [Thu, 10 Oct 2019 10:01:48 +0000 (12:01 +0200)]
cpuidle: psci: Support CPU hotplug for the hierarchical model

When the hierarchical CPU topology is used and when a CPU is put offline,
that CPU prevents its PM domain from being powered off, which is because
genpd observes the corresponding attached device as being active from a
runtime PM point of view. Furthermore, any potential master PM domains are
also prevented from being powered off.

To address this limitation, let's add add a new CPU hotplug state
(CPUHP_AP_CPU_PM_STARTING) and register up/down callbacks for it, which
allows us to deal with runtime PM accordingly.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
4 years agocpuidle: psci: Manage runtime PM in the idle path
Ulf Hansson [Thu, 10 Oct 2019 10:01:48 +0000 (12:01 +0200)]
cpuidle: psci: Manage runtime PM in the idle path

In case we have succeeded to attach a CPU to its PM domain, let's deploy
runtime PM support for the corresponding attached device, to allow the CPU
to be powered-managed accordingly.

The triggering point for when runtime PM reference counting should be done,
has been selected to the deepest idle state for the CPU. However, from the
hierarchical point view, there may be good reasons to do runtime PM
reference counting even on shallower idle states, but at this point this
isn't supported, mainly due to limitations set by the generic PM domain.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
4 years agocpuidle: psci: Prepare to use OS initiated suspend mode via PM domains
Ulf Hansson [Thu, 10 Oct 2019 10:01:48 +0000 (12:01 +0200)]
cpuidle: psci: Prepare to use OS initiated suspend mode via PM domains

The per CPU variable psci_power_state, contains an array of fixed values,
which reflects the corresponding arm,psci-suspend-param parsed from DT, for
each of the available CPU idle states.

This isn't sufficient when using the hierarchical CPU topology in DT, in
combination with having PSCI OS initiated (OSI) mode enabled. More
precisely, in OSI mode, Linux is responsible of telling the PSCI FW what
idle state the cluster (a group of CPUs) should enter, while in PSCI
Platform Coordinated (PC) mode, each CPU independently votes for an idle
state of the cluster.

For this reason, introduce a per CPU variable called domain_state and
implement two helper functions to read/write its value. Then let the
domain_state take precedence over the regular selected state, when entering
and idle state.

To avoid executing the above OSI specific code in the ->enter() callback,
while operating in the default PSCI Platform Coordinated mode, let's also
add a new enter-function and use it for OSI.

Co-developed-by: Lina Iyer <lina.iyer@linaro.org>
Signed-off-by: Lina Iyer <lina.iyer@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
4 years agocpuidle: psci: Attach CPU devices to their PM domains
Ulf Hansson [Thu, 10 Oct 2019 10:01:48 +0000 (12:01 +0200)]
cpuidle: psci: Attach CPU devices to their PM domains

In order to enable a CPU to be power managed through its PM domain, let's
try to attach it by calling psci_dt_attach_cpu() during the cpuidle
initialization.

psci_dt_attach_cpu() returns a pointer to the attached struct device, which
later should be used for runtime PM, hence we need to store it somewhere.
Rather than adding yet another per CPU variable, let's create a per CPU
struct to collect the relevant per CPU variables.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
4 years agocpuidle: psci: Add a helper to attach a CPU to its PM domain
Ulf Hansson [Mon, 28 Oct 2019 15:32:23 +0000 (16:32 +0100)]
cpuidle: psci: Add a helper to attach a CPU to its PM domain

Introduce a PSCI DT helper function, psci_dt_attach_cpu(), which takes a
CPU number as an in-parameter and tries to attach the CPU's struct device
to its corresponding PM domain.

Let's makes use of dev_pm_domain_attach_by_name(), as it allows us to
specify "psci" as the "name" of the PM domain to attach to. Additionally,
let's also prepare the attached device to be power managed via runtime PM.

Note that, the implementation of the new helper function is in a new
separate c-file, which may seems a bit too much at this point. However,
subsequent changes that implements the remaining part of the PM domain
support for cpuidle-psci, helps to justify this split.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
4 years agocpuidle: psci: Support hierarchical CPU idle states
Ulf Hansson [Thu, 10 Oct 2019 10:01:48 +0000 (12:01 +0200)]
cpuidle: psci: Support hierarchical CPU idle states

Currently CPU's idle states are represented using the flattened model.
Let's add support for the hierarchical layout, via converting to use
of_get_cpu_state_node().

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
4 years agocpuidle: psci: Simplify OF parsing of CPU idle state nodes
Ulf Hansson [Thu, 10 Oct 2019 10:01:48 +0000 (12:01 +0200)]
cpuidle: psci: Simplify OF parsing of CPU idle state nodes

Iterating through the idle state nodes in DT, to find out the number of
states that needs to be allocated is unnecessary, as it has already been
done from dt_init_idle_driver(). Therefore, drop the iteration and use the
number we already have at hand.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
4 years agocpuidle: dt: Support hierarchical CPU idle states
Lina Iyer [Thu, 10 Oct 2019 10:01:48 +0000 (12:01 +0200)]
cpuidle: dt: Support hierarchical CPU idle states

Currently CPU's idle states are represented using the flattened model.
Let's add support for the hierarchical layout, via converting to use
of_get_cpu_state_node().

Suggested-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Lina Iyer <lina.iyer@linaro.org>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Co-developed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
4 years agoof: base: Add of_get_cpu_state_node() to get idle states for a CPU node
Ulf Hansson [Thu, 10 Oct 2019 10:01:48 +0000 (12:01 +0200)]
of: base: Add of_get_cpu_state_node() to get idle states for a CPU node

The CPU's idle state nodes are currently parsed at the common cpuidle DT
library, but also when initializing data for specific CPU idle operations,
as in the PSCI cpuidle driver case and qcom-spm cpuidle case.

To avoid open-coding, let's introduce of_get_cpu_state_node(), which takes
the device node for the CPU and the index to the requested idle state node,
as in-parameters. In case a corresponding idle state node is found, it
returns the node with the refcount incremented for it, else it returns
NULL.

Moreover, for PSCI there are two options to describe the CPU's idle states
[1], either via a flattened description or a hierarchical layout. Hence,
let's take both options into account.

[1] Documentation/devicetree/bindings/arm/psci.yaml

Suggested-by: Sudeep Holla <sudeep.holla@arm.com>
Co-developed-by: Lina Iyer <lina.iyer@linaro.org>
Signed-off-by: Lina Iyer <lina.iyer@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
4 years agofirmware: psci: Export functions to manage the OSI mode
Ulf Hansson [Thu, 10 Oct 2019 10:01:48 +0000 (12:01 +0200)]
firmware: psci: Export functions to manage the OSI mode

To allow subsequent changes to implement support for OSI mode through the
cpuidle-psci driver, export the existing psci_has_osi_support(). Export
also a new function, psci_set_osi_mode(), that allows its caller to enable
the OS-initiated CPU-suspend mode in the PSCI FW.

To deal with backwards compatibility for a kernel started through a kexec
call, default to set the CPU-suspend mode to the Platform Coordinated mode
during boot.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
4 years agodt: psci: Update DT bindings to support hierarchical PSCI states
Ulf Hansson [Thu, 10 Oct 2019 10:01:48 +0000 (12:01 +0200)]
dt: psci: Update DT bindings to support hierarchical PSCI states

Update PSCI DT bindings to allow to represent idle states for CPUs and the
CPU topology, by using a hierarchical layout. Primarily this is done by
re-using the existing DT bindings for PM domains [1] and for PM domain idle
states [2].

Let's also add an example into the document for the PSCI DT bindings, to
clearly show the new hierarchical based layout. The currently supported
flattened layout, is already described in the ARM idle states bindings [3],
so let's leave that as is.

[1] Documentation/devicetree/bindings/power/power_domain.txt
[2] Documentation/devicetree/bindings/power/domain-idle-state.txt
[3] Documentation/devicetree/bindings/arm/idle-states.txt

Co-developed-by: Lina Iyer <lina.iyer@linaro.org>
Signed-off-by: Lina Iyer <lina.iyer@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
4 years agocpuidle: psci: Align psci_power_state count with idle state count
Sudeep Holla [Thu, 24 Oct 2019 15:18:34 +0000 (16:18 +0100)]
cpuidle: psci: Align psci_power_state count with idle state count

Instead of allocating 'n-1' states in psci_power_state to manage 'n'
idle states which include "ARM WFI" state, it would be simpler to have
1:1 mapping between psci_power_state and cpuidle driver states.

ARM WFI state(i.e. idx == 0) is handled specially in the generic macro
CPU_PM_CPU_IDLE_ENTER_PARAM and hence state[-1] is not possible. However
for sake of code readability, it is better to have 1:1 mapping and not
use [idx - 1] to access psci_power_state corresponding to driver cpuidle
state for idx.

psci_power_state[0] is default initialised to 0 and is never accessed
while entering WFI state.

Reported-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
4 years agoreset: uniphier: Add SCSSI reset control for each channel
Kunihiko Hayashi [Fri, 29 Nov 2019 04:19:19 +0000 (13:19 +0900)]
reset: uniphier: Add SCSSI reset control for each channel

SCSSI has reset controls for each channel in the SoCs newer than Pro4,
so this adds missing reset controls for channel 1, 2 and 3. And more, this
moves MCSSI reset ID after SCSSI.

Fixes: 6b39fd590aeb ("reset: uniphier: add reset control support for SPI")
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
4 years agoreset: Align logic and flow in managed helpers
Geert Uytterhoeven [Wed, 20 Nov 2019 14:59:27 +0000 (15:59 +0100)]
reset: Align logic and flow in managed helpers

__devm_reset_control_get() and devm_reset_control_array_get() are very
similar, but they do not look similar, due to inverted logic.
Make them more similar, following the "bail out early" paradigm.

Adjust the logic and flow in devm_reset_controller_register() to match
the two other functions.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
4 years agoreset: npcm: add NPCM reset controller driver
Tomer Maimon [Wed, 6 Nov 2019 14:53:31 +0000 (16:53 +0200)]
reset: npcm: add NPCM reset controller driver

Add Nuvoton NPCM BMC reset controller driver.

Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
4 years agodt-bindings: reset: Add binding constants for NPCM7xx reset controller
Tomer Maimon [Wed, 6 Nov 2019 14:53:30 +0000 (16:53 +0200)]
dt-bindings: reset: Add binding constants for NPCM7xx reset controller

Add device tree binding constants for Nuvoton BMC NPCM7xx
reset controller.

Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
4 years agodt-bindings: reset: add NPCM reset controller documentation
Tomer Maimon [Wed, 6 Nov 2019 14:53:29 +0000 (16:53 +0200)]
dt-bindings: reset: add NPCM reset controller documentation

Added device tree binding documentation for Nuvoton BMC
NPCM reset controller.

Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
4 years agomemory: samsung: exynos5422-dmc: Convert to devm_platform_ioremap_resource
Yangtao Li [Sun, 22 Dec 2019 18:50:32 +0000 (18:50 +0000)]
memory: samsung: exynos5422-dmc: Convert to devm_platform_ioremap_resource

Use devm_platform_ioremap_resource() to simplify code.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Acked-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
4 years agodrivers: firmware: scmi: Extend SCMI transport layer by trace events
Lukasz Luba [Tue, 17 Dec 2019 13:43:45 +0000 (13:43 +0000)]
drivers: firmware: scmi: Extend SCMI transport layer by trace events

The SCMI transport layer communicates via mailboxes and shared memory with
firmware running on a microcontroller. It is platform specific how long it
takes to pass a SCMI message. The most sensitive requests are coming from
CPUFreq subsystem, which might be used by the scheduler.
Thus, there is a need to measure these delays and capture anomalies.
This change introduces trace events wrapped around transfer code.

According to Jim's suggestion a unique transfer_id is to distinguish
similar entries which might have the same message id, protocol id and
sequence. This is a case then there are some timeouts in transfers.

Suggested-by: Jim Quinlan <james.quinlan@broadcom.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
4 years agoinclude: trace: Add SCMI header with trace events
Lukasz Luba [Tue, 17 Dec 2019 13:43:44 +0000 (13:43 +0000)]
include: trace: Add SCMI header with trace events

Adding trace events would help to measure the speed of the communication
channel. It can be also potentially used helpful during investigation
of some issues platforms which use different transport layer.

Update also MAINTAINERS file with information that the new trace events
are maintained.

Suggested-by: Jim Quinlan <james.quinlan@broadcom.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
4 years agoLinux 5.5-rc4
Linus Torvalds [Sun, 29 Dec 2019 23:29:16 +0000 (15:29 -0800)]
Linux 5.5-rc4

4 years agoMerge tag 'riscv/for-v5.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv...
Linus Torvalds [Sun, 29 Dec 2019 18:01:27 +0000 (10:01 -0800)]
Merge tag 'riscv/for-v5.5-rc4' of git://git./linux/kernel/git/riscv/linux

Pull RISC-V fixes from Paul Walmsley:
 "One important fix for RISC-V:

   - Redirect any incoming syscall with an ID less than -1 to
     sys_ni_syscall, rather than allowing them to fall through into the
     syscall handler.

  and two minor build fixes:

   - Export __asm_copy_{from,to}_user() from where they are defined.
     This fixes a build error triggered by some randconfigs.

   - Export flush_icache_all(). I'd resisted this before, since
     historically we didn't want modules to be able to flush the I$
     directly; but apparently everyone else is doing it now"

* tag 'riscv/for-v5.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: export flush_icache_all to modules
  riscv: reject invalid syscalls below -1
  riscv: fix compile failure with EXPORT_SYMBOL() & !MMU

4 years agoMerge tag 'locks-v5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton...
Linus Torvalds [Sun, 29 Dec 2019 17:50:57 +0000 (09:50 -0800)]
Merge tag 'locks-v5.5-1' of git://git./linux/kernel/git/jlayton/linux

Pull /proc/locks formatting fix from Jeff Layton:
 "This is a trivial fix for a _very_ long standing bug in /proc/locks
  formatting. Ordinarily, I'd wait for the merge window for something
  like this, but it is making it difficult to validate some overlayfs
  fixes.

  I've also gone ahead and marked this for stable"

* tag 'locks-v5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux:
  locks: print unsigned ino in /proc/locks

4 years agoMerge tag '5.5-rc3-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Sun, 29 Dec 2019 17:48:47 +0000 (09:48 -0800)]
Merge tag '5.5-rc3-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "One performance fix for large directory searches, and one minor style
  cleanup noticed by Clang"

* tag '5.5-rc3-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: Optimize readdir on reparse points
  cifs: Adjust indentation in smb2_open_file

4 years agolocks: print unsigned ino in /proc/locks
Amir Goldstein [Sun, 22 Dec 2019 18:45:28 +0000 (20:45 +0200)]
locks: print unsigned ino in /proc/locks

An ino is unsigned, so display it as such in /proc/locks.

Cc: stable@vger.kernel.org
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
4 years agoriscv: export flush_icache_all to modules
Olof Johansson [Tue, 17 Dec 2019 04:07:04 +0000 (20:07 -0800)]
riscv: export flush_icache_all to modules

This is needed by LKDTM (crash dump test module), it calls
flush_icache_range(), which on RISC-V turns into flush_icache_all(). On
other architectures, the actual implementation is exported, so follow
that precedence and export it here too.

Fixes build of CONFIG_LKDTM that fails with:
ERROR: "flush_icache_all" [drivers/misc/lkdtm/lkdtm.ko] undefined!

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
4 years agoriscv: reject invalid syscalls below -1
David Abdurachmanov [Wed, 18 Dec 2019 08:47:56 +0000 (10:47 +0200)]
riscv: reject invalid syscalls below -1

Running "stress-ng --enosys 4 -t 20 -v" showed a large number of kernel oops
with "Unable to handle kernel paging request at virtual address" message. This
happens when enosys stressor starts testing random non-valid syscalls.

I forgot to redirect any syscall below -1 to sys_ni_syscall.

With the patch kernel oops messages are gone while running stress-ng enosys
stressor.

Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com>
Fixes: 5340627e3fe0 ("riscv: add support for SECCOMP and SECCOMP_FILTER")
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
4 years agoriscv: fix compile failure with EXPORT_SYMBOL() & !MMU
Luc Van Oostenryck [Sun, 22 Dec 2019 09:26:04 +0000 (10:26 +0100)]
riscv: fix compile failure with EXPORT_SYMBOL() & !MMU

When support for !MMU was added, the declaration of
__asm_copy_to_user() & __asm_copy_from_user() were #ifdefed
out hence their EXPORT_SYMBOL() give an error message like:
  .../riscv_ksyms.c:13:15: error: '__asm_copy_to_user' undeclared here
  .../riscv_ksyms.c:14:15: error: '__asm_copy_from_user' undeclared here

Since these symbols are not defined with !MMU it's wrong to export them.
Same for __clear_user() (even though this one is also declared in
include/asm-generic/uaccess.h and thus doesn't give an error message).

Fix this by doing the EXPORT_SYMBOL() directly where these symbols
are defined: inside lib/uaccess.S itself.

Fixes: 6bd33e1ece52 ("riscv: fix compile failure with EXPORT_SYMBOL() & !MMU")
Reported-by: kbuild test robot <lkp@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
4 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sat, 28 Dec 2019 01:28:41 +0000 (17:28 -0800)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Four fixes and one spelling update, all in drivers: two in lpfc and
  the rest in mp3sas, cxgbi and target"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: target/iblock: Fix protection error with blocks greater than 512B
  scsi: libcxgbi: fix NULL pointer dereference in cxgbi_device_destroy()
  scsi: lpfc: fix spelling mistakes of asynchronous
  scsi: lpfc: fix build failure with DEBUGFS disabled
  scsi: mpt3sas: Fix double free in attach error handling

4 years agoMerge tag 'drm-fixes-2019-12-28' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 27 Dec 2019 21:21:06 +0000 (13:21 -0800)]
Merge tag 'drm-fixes-2019-12-28' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Post-xmas food coma recovery fixes. Only three fixes for i915 since I
  expect most people are holidaying.

  i915:
   - power management rc6 fix
   - framebuffer tracking fix
   - display power management ratelimit fix"

* tag 'drm-fixes-2019-12-28' of git://anongit.freedesktop.org/drm/drm:
  drm/i915: Hold reference to intel_frontbuffer as we track activity
  drm/i915/gt: Ratelimit display power w/a
  drm/i915/pmu: Ensure monotonic rc6

4 years agoMerge tag 'linux-kselftest-5.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 27 Dec 2019 19:30:26 +0000 (11:30 -0800)]
Merge tag 'linux-kselftest-5.5-rc4' of git://git./linux/kernel/git/shuah/linux-kselftest

Pull Kselftest fixes from Shuah Khan:

 - rseq build failures fixes related to glibc 2.30 compatibility from
   Mathieu Desnoyers

 - Kunit fixes and cleanups from SeongJae Park

 - Fixes to filesystems/epoll, firmware, and livepatch build failures
   and skip handling.

* tag 'linux-kselftest-5.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  rseq/selftests: Clarify rseq_prepare_unload() helper requirements
  rseq/selftests: Fix: Namespace gettid() for compatibility with glibc 2.30
  rseq/selftests: Turn off timeout setting
  kunit/kunit_tool_test: Test '--build_dir' option run
  kunit: Rename 'kunitconfig' to '.kunitconfig'
  kunit: Place 'test.log' under the 'build_dir'
  kunit: Create default config in '--build_dir'
  kunit: Remove duplicated defconfig creation
  docs/kunit/start: Use in-tree 'kunit_defconfig'
  selftests: livepatch: Fix it to do root uid check and skip
  selftests: firmware: Fix it to do root uid check and skip
  selftests: filesystems/epoll: fix build error

4 years agoMerge tag 'pm-5.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Linus Torvalds [Fri, 27 Dec 2019 19:26:54 +0000 (11:26 -0800)]
Merge tag 'pm-5.5-rc4' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "Fix compile test of the Tegra devfreq driver (Arnd Bergmann) and
  remove redundant Kconfig dependencies from multiple devfreq drivers
  (Leonard Crestez)"

* tag 'pm-5.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / devfreq: tegra: Add COMMON_CLK dependency
  PM / devfreq: Drop explicit selection of PM_OPP

4 years agoMerge tag 'io_uring-5.5-20191226' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 27 Dec 2019 19:17:08 +0000 (11:17 -0800)]
Merge tag 'io_uring-5.5-20191226' of git://git.kernel.dk/linux-block

Pull io_uring fixes from Jens Axboe:

 - Removal of now unused busy wqe list (Hillf)

 - Add cond_resched() to io-wq work processing (Hillf)

 - And then the series that I hinted at from last week, which removes
   the sqe from the io_kiocb and keeps all sqe handling on the prep
   side. This guarantees that an opcode can't do the wrong thing and
   read the sqe more than once. This is unchanged from last week, no
   issues have been observed with this in testing. Hence I really think
   we should fold this into 5.5.

* tag 'io_uring-5.5-20191226' of git://git.kernel.dk/linux-block:
  io-wq: add cond_resched() to worker thread
  io-wq: remove unused busy list from io_sqe
  io_uring: pass in 'sqe' to the prep handlers
  io_uring: standardize the prep methods
  io_uring: read 'count' for IORING_OP_TIMEOUT in prep handler
  io_uring: move all prep state for IORING_OP_{SEND,RECV}_MGS to prep handler
  io_uring: move all prep state for IORING_OP_CONNECT to prep handler
  io_uring: add and use struct io_rw for read/writes
  io_uring: use u64_to_user_ptr() consistently

4 years agoMerge tag 'libata-5.5-20191226' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 27 Dec 2019 19:13:18 +0000 (11:13 -0800)]
Merge tag 'libata-5.5-20191226' of git://git.kernel.dk/linux-block

Pull libata fixes from Jens Axboe:
 "Two things in here:

   - First half of a series that fixes ahci_brcm, also marked for
     stable. The other part of the series is going into 5.6 (Florian)

   - sata_nv regression fix that is also marked for stable (Sascha)"

* tag 'libata-5.5-20191226' of git://git.kernel.dk/linux-block:
  ata: ahci_brcm: Add missing clock management during recovery
  ata: ahci_brcm: BCM7425 AHCI requires AHCI_HFLAG_DELAY_ENGINE
  ata: ahci_brcm: Fix AHCI resources management
  ata: libahci_platform: Export again ahci_platform_<en/dis>able_phys()
  libata: Fix retrieving of active qcs

4 years agoMerge tag 'block-5.5-20191226' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 27 Dec 2019 19:09:04 +0000 (11:09 -0800)]
Merge tag 'block-5.5-20191226' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "Only thing here are the changes from Arnd from last week, which now
  have the appropriate header include to ensure they actually compile if
  COMPAT is enabled"

* tag 'block-5.5-20191226' of git://git.kernel.dk/linux-block:
  compat_ioctl: block: handle Persistent Reservations
  compat_ioctl: block: handle add zone open, close and finish ioctl
  compat_ioctl: block: handle BLKGETZONESZ/BLKGETNRZONES
  compat_ioctl: block: handle BLKREPORTZONE/BLKRESETZONE
  pktcdvd: fix regression on 64-bit architectures

4 years agoMerge tag 'gpio-v5.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux...
Linus Torvalds [Fri, 27 Dec 2019 19:02:48 +0000 (11:02 -0800)]
Merge tag 'gpio-v5.5-2' of git://git./linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
 "A set of fixes for the v5.5 series:

   - Fix the build for the Xtensa driver.

   - Make sure to set up the parent device for mpc8xxx.

   - Clarify the look-up error message.

   - Fix the usage of the line direction in the mockup device.

   - Fix a type warning on the Aspeed driver.

   - Remove the pointless __exit annotation on the xgs-iproc which is
     causing a compilation problem.

   - Fix up emultation of open drain outputs .get_direction()

   - Fix the IRQ callbacks on the PCA953xx to use bitops and work
     properly.

   - Fix the Kconfig on the Tegra driver"

* tag 'gpio-v5.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: tegra186: Allow building on Tegra194-only configurations
  gpio: pca953x: Switch to bitops in IRQ callbacks
  gpiolib: fix up emulated open drain outputs
  MAINTAINERS: Append missed file to the database
  gpio: xgs-iproc: remove __exit annotation for iproc_gpio_remove
  gpio: aspeed: avoid return type warning
  gpio: mockup: Fix usage of new GPIO_LINE_DIRECTION
  gpio: Fix error message on out-of-range GPIO in lookup table
  gpio: mpc8xxx: Add platform device to gpiochip->parent
  gpio: xtensa: fix driver build

4 years agoMerge tag 'drm-intel-fixes-2019-12-23' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Fri, 27 Dec 2019 03:13:06 +0000 (13:13 +1000)]
Merge tag 'drm-intel-fixes-2019-12-23' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

i915 power and frontbuffer tracking fixes

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/87r20vdlrs.fsf@intel.com
4 years agoata: ahci_brcm: Add missing clock management during recovery
Florian Fainelli [Tue, 10 Dec 2019 18:53:47 +0000 (10:53 -0800)]
ata: ahci_brcm: Add missing clock management during recovery

The downstream implementation of ahci_brcm.c did contain clock
management recovery, but until recently, did that outside of the
libahci_platform helpers and this was unintentionally stripped out while
forward porting the patch upstream.

Add the missing clock management during recovery and sleep for 10
milliseconds per the design team recommendations to ensure the SATA PHY
controller and AFE have been fully quiesced.

Fixes: eb73390ae241 ("ata: ahci_brcm: Recover from failures to identify devices")
Cc: stable@vger.kernel.org
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
4 years agoata: ahci_brcm: BCM7425 AHCI requires AHCI_HFLAG_DELAY_ENGINE
Florian Fainelli [Tue, 10 Dec 2019 18:53:46 +0000 (10:53 -0800)]
ata: ahci_brcm: BCM7425 AHCI requires AHCI_HFLAG_DELAY_ENGINE

Set AHCI_HFLAG_DELAY_ENGINE for the BCM7425 AHCI controller thus making
it conforming to the 'strict' AHCI implementation which this controller
is based on.

This solves long link establishment with specific hard drives (e.g.:
Seagate ST1000VM002-9ZL1 SC12) that would otherwise have to complete the
error recovery handling before finally establishing a succesful SATA
link at the desired speed.

We re-order the hpriv->flags assignment to also remove the NONCQ quirk
since we can set the flag directly.

Fixes: 9586114cf1e9 ("ata: ahci_brcmstb: add support MIPS-based platforms")
Fixes: 423be77daabe ("ata: ahci_brcmstb: add quirk for broken ncq")
Cc: stable@vger.kernel.org
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
4 years agoata: ahci_brcm: Fix AHCI resources management
Florian Fainelli [Tue, 10 Dec 2019 18:53:45 +0000 (10:53 -0800)]
ata: ahci_brcm: Fix AHCI resources management

The AHCI resources management within ahci_brcm.c is a little
convoluted, largely because it historically had a dedicated clock that
was managed within this file in the downstream tree. Once brough
upstream though, the clock was left to be managed by libahci_platform.c
which is entirely appropriate.

This patch series ensures that the AHCI resources are fetched and
enabled before any register access is done, thus avoiding bus errors on
platforms which clock gate the controller by default.

As a result we need to re-arrange the suspend() and resume() functions
in order to avoid accessing registers after the clocks have been turned
off respectively before the clocks have been turned on. Finally, we can
refactor brcm_ahci_get_portmask() in order to fetch the number of ports
from hpriv->mmio which is now accessible without jumping through hoops
like we used to do.

The commit pointed in the Fixes tag is both old and new enough not to
require major headaches for backporting of this patch.

Fixes: eba68f829794 ("ata: ahci_brcmstb: rename to support across Broadcom SoC's")
Cc: stable@vger.kernel.org
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
4 years agoata: libahci_platform: Export again ahci_platform_<en/dis>able_phys()
Florian Fainelli [Tue, 10 Dec 2019 18:53:44 +0000 (10:53 -0800)]
ata: libahci_platform: Export again ahci_platform_<en/dis>able_phys()

This reverts commit 6bb86fefa086faba7b60bb452300b76a47cde1a5
("libahci_platform: Staticize ahci_platform_<en/dis>able_phys()") we are
going to need ahci_platform_{enable,disable}_phys() in a subsequent
commit for ahci_brcm.c in order to properly control the PHY
initialization order.

Also make sure the function prototypes are declared in
include/linux/ahci_platform.h as a result.

Cc: stable@vger.kernel.org
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
4 years agolibata: Fix retrieving of active qcs
Sascha Hauer [Fri, 13 Dec 2019 08:04:08 +0000 (09:04 +0100)]
libata: Fix retrieving of active qcs

ata_qc_complete_multiple() is called with a mask of the still active
tags.

mv_sata doesn't have this information directly and instead calculates
the still active tags from the started tags (ap->qc_active) and the
finished tags as (ap->qc_active ^ done_mask)

Since 28361c40368 the hw_tag and tag are no longer the same and the
equation is no longer valid. In ata_exec_internal_sg() ap->qc_active is
initialized as 1ULL << ATA_TAG_INTERNAL, but in hardware tag 0 is
started and this will be in done_mask on completion. ap->qc_active ^
done_mask becomes 0x100000000 ^ 0x1 = 0x100000001 and thus tag 0 used as
the internal tag will never be reported as completed.

This is fixed by introducing ata_qc_get_active() which returns the
active hardware tags and calling it where appropriate.

This is tested on mv_sata, but sata_fsl and sata_nv suffer from the same
problem. There is another case in sata_nv that most likely needs fixing
as well, but this looks a little different, so I wasn't confident enough
to change that.

Fixes: 28361c403683 ("libata: add extra internal command")
Cc: stable@vger.kernel.org
Tested-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Add missing export of ata_qc_get_active(), as per Pali.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
4 years agoMerge tag 'devfreq-fixes-for-5.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel...
Rafael J. Wysocki [Wed, 25 Dec 2019 14:15:55 +0000 (15:15 +0100)]
Merge tag 'devfreq-fixes-for-5.5-rc4' of git://git./linux/kernel/git/chanwoo/linux

Pull devfreq fixes for 5.5-rc4 from Chanwoo Choi:

"1. Fix the build error of tegra*-devfreq.c when COMPILE_TEST is enabled.
 2. Drop unneeded PM_OPP dependency from each driver in Kconfig."

* tag 'devfreq-fixes-for-5.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux:
  PM / devfreq: tegra: Add COMMON_CLK dependency
  PM / devfreq: Drop explicit selection of PM_OPP

4 years agoio-wq: add cond_resched() to worker thread
Hillf Danton [Tue, 24 Dec 2019 16:14:29 +0000 (09:14 -0700)]
io-wq: add cond_resched() to worker thread

Reschedule the current IO worker to cut the risk that it is becoming
a cpu hog.

Signed-off-by: Hillf Danton <hdanton@sina.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
4 years agoreset: reset-scmi: Match scmi device by both name and protocol id
Sudeep Holla [Wed, 6 Nov 2019 17:58:03 +0000 (17:58 +0000)]
reset: reset-scmi: Match scmi device by both name and protocol id

The scmi bus now has support to match the driver with devices not only
based on their protocol id but also based on their device name if one is
available. This was added to cater the need to support multiple devices
and drivers for the same protocol.

Let us add the name "reset" to scmi_device_id table in the driver so
that in matches only with device with the same name and protocol id
SCMI_PROTOCOL_RESET.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
4 years agohwmon: (scmi-hwmon) Match scmi device by both name and protocol id
Sudeep Holla [Wed, 6 Nov 2019 17:57:30 +0000 (17:57 +0000)]
hwmon: (scmi-hwmon) Match scmi device by both name and protocol id

The scmi bus now has support to match the driver with devices not only
based on their protocol id but also based on their device name if one is
available. This was added to cater the need to support multiple devices
and drivers for the same protocol.

Let us add the name "hwmon" to scmi_device_id table in the driver so
that in matches only with device with the same name and protocol id
SCMI_PROTOCOL_SENSOR. This is just for sake of completion and must
not be used to add IIO support in parallel. Instead, if IIO support is
added ever in future, we need to drop this hwmon driver entirely and
use the iio->hwmon bridge to access the sensors as hwmon devices if
needed.

Cc: linux-hwmon@vger.kernel.org
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
4 years agocpufreq: scmi: Match scmi device by both name and protocol id
Sudeep Holla [Wed, 6 Nov 2019 17:56:25 +0000 (17:56 +0000)]
cpufreq: scmi: Match scmi device by both name and protocol id

The scmi bus now has support to match the driver with devices not only
based on their protocol id but also based on their device name if one is
available. This was added to cater the need to support multiple devices
and drivers for the same protocol.

Let us add the name "cpufreq" to scmi_device_id table in the driver so
that in matches only with device with the same name and protocol id
SCMI_PROTOCOL_PERF. This will help to add "devfreq" device/driver.

Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
4 years agoclk: scmi: Match scmi device by both name and protocol id
Sudeep Holla [Wed, 6 Nov 2019 17:55:47 +0000 (17:55 +0000)]
clk: scmi: Match scmi device by both name and protocol id

The scmi bus now has support to match the driver with devices not only
based on their protocol id but also based on their device name if one is
available. This was added to cater the need to support multiple devices
and drivers for the same protocol.

Let us add the name "clocks" to scmi_device_id table in the driver so
that in matches only with device with the same name and protocol id
SCMI_PROTOCOL_CLOCK.

Cc: linux-clk@vger.kernel.org
Cc: Michael Turquette <mturquette@baylibre.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
4 years agofirmware: arm_scmi: Skip protocol initialisation for additional devices
Sudeep Holla [Thu, 7 Nov 2019 11:39:45 +0000 (11:39 +0000)]
firmware: arm_scmi: Skip protocol initialisation for additional devices

The scmi bus now supports adding multiple devices per protocol,
and since scmi_protocol_init is called for each scmi device created,
we must avoid allocating protocol private data and initialising the
protocol itself if it is already initialised.

In order to achieve the same, we can simple replace the idr pointer
from protocol initialisation function to a dummy function.

Suggested-by: Cristian Marussi <cristian.marussi@arm.com>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
4 years agofirmware: arm_scmi: Stash version in protocol init functions
Sudeep Holla [Fri, 22 Nov 2019 14:48:40 +0000 (14:48 +0000)]
firmware: arm_scmi: Stash version in protocol init functions

In order to avoid querying the individual protocol versions multiple
time with more that one device created for each protocol, we can simple
store the copy in the protocol specific private data and use them whenever
required.

Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
4 years agofirmware: arm_scmi: Match scmi device by both name and protocol id
Sudeep Holla [Wed, 6 Nov 2019 17:55:03 +0000 (17:55 +0000)]
firmware: arm_scmi: Match scmi device by both name and protocol id

The scmi bus now has support to match the driver with devices not only
based on their protocol id but also based on their device name if one is
available. This was added to cater the need to support multiple devices
and drivers for the same protocol.

Let us add the name "genpd" to scmi_device_id table in the driver so
that in matches only with device with the same name and protocol id
SCMI_PROTOCOL_POWER.

Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
4 years agofirmware: arm_scmi: Add versions and identifier attributes using dev_groups
Sudeep Holla [Tue, 22 Oct 2019 09:09:01 +0000 (10:09 +0100)]
firmware: arm_scmi: Add versions and identifier attributes using dev_groups

Platform drivers now have the option to have the platform core create
and remove any needed sysfs attribute files. Using the same, let's add
the scmi firmware and protocol version attributes as well as vendor and
sub-vendor identifiers to sysfs.

It helps to identify the firmware details from the sysfs entries similar
to ARM SCPI implementation.

Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
4 years agofirmware: arm_scmi: Add names to scmi devices created
Sudeep Holla [Wed, 6 Nov 2019 15:17:26 +0000 (15:17 +0000)]
firmware: arm_scmi: Add names to scmi devices created

Now that scmi bus provides option to create named scmi device, let us
create the default devices with names. This will help to add names for
matching to respective drivers and eventually to add multiple devices
and drivers per protocol.

Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
4 years agofirmware: arm_scmi: Skip scmi mbox channel setup for addtional devices
Sudeep Holla [Wed, 6 Nov 2019 11:32:05 +0000 (11:32 +0000)]
firmware: arm_scmi: Skip scmi mbox channel setup for addtional devices

Now that the scmi bus supports adding multiple devices per protocol,
and since scmi_create_protocol_device calls scmi_mbox_chan_setup,
we must avoid allocating and initialising the mbox channel if it is
already initialised.

Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
4 years agofirmware: arm_scmi: Add support for multiple device per protocol
Sudeep Holla [Fri, 21 Dec 2018 18:08:08 +0000 (18:08 +0000)]
firmware: arm_scmi: Add support for multiple device per protocol

Currently only one scmi device is created for each protocol enumerated.
However, there is requirement to make use of some procotols by multiple
kernel subsystems/frameworks. One such example is SCMI PERFORMANCE
protocol which can be used by both cpufreq and devfreq drivers.
Similarly, SENSOR protocol may be used by hwmon and iio subsystems,
and POWER protocol may be used by genpd and regulator drivers.

In order to achieve that, let us extend the scmi bus to match based
not only protocol id but also the scmi device name if one is available.

Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
4 years agorseq/selftests: Clarify rseq_prepare_unload() helper requirements
Mathieu Desnoyers [Fri, 20 Dec 2019 20:33:18 +0000 (15:33 -0500)]
rseq/selftests: Clarify rseq_prepare_unload() helper requirements

The rseq.h UAPI now documents that the rseq_cs field must be cleared
before reclaiming memory that contains the targeted struct rseq_cs, but
also that the rseq_cs field must be cleared before reclaiming memory of
the code pointed to by the rseq_cs start_ip and post_commit_offset
fields.

While we can expect that use of dlclose(3) will typically unmap
both struct rseq_cs and its associated code at once, nothing would
theoretically prevent a JIT from reclaiming the code without
reclaiming the struct rseq_cs, which would erroneously allow the
kernel to consider new code which is not a rseq critical section
as a rseq critical section following a code reclaim.

Suggested-by: Florian Weimer <fw@deneb.enyo.de>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Florian Weimer <fw@deneb.enyo.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: "Paul E. McKenney" <paulmck@linux.ibm.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Paul Turner <pjt@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
4 years agorseq/selftests: Fix: Namespace gettid() for compatibility with glibc 2.30
Mathieu Desnoyers [Wed, 11 Dec 2019 16:17:13 +0000 (11:17 -0500)]
rseq/selftests: Fix: Namespace gettid() for compatibility with glibc 2.30

glibc 2.30 introduces gettid() in public headers, which clashes with
the internal static definition within rseq selftests.

Rename gettid() to rseq_gettid() to eliminate this symbol name clash.

Reported-by: Tommi T. Rantala <tommi.t.rantala@nokia.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Tommi T. Rantala <tommi.t.rantala@nokia.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: "Paul E. McKenney" <paulmck@linux.ibm.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Paul Turner <pjt@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: <stable@vger.kernel.org> # v4.18+
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
4 years agorseq/selftests: Turn off timeout setting
Mathieu Desnoyers [Wed, 11 Dec 2019 16:28:57 +0000 (11:28 -0500)]
rseq/selftests: Turn off timeout setting

As the rseq selftests can run for a long period of time, disable the
timeout that the general selftests have.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: "Paul E. McKenney" <paulmck@linux.ibm.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Paul Turner <pjt@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
4 years agokunit/kunit_tool_test: Test '--build_dir' option run
SeongJae Park [Fri, 20 Dec 2019 05:14:08 +0000 (05:14 +0000)]
kunit/kunit_tool_test: Test '--build_dir' option run

This commit adds kunit tool test for the '--build_dir' option.

Signed-off-by: SeongJae Park <sjpark@amazon.de>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Tested-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>