can: Kconfig: add CONFIG_CAN_RX_OFFLOAD

Only a few drivers rely on the CAN rx offload framework (as of the
writing of this patch, only four: flexcan, m_can, mcp251xfd and
ti_hecc). Split it out of can-dev and add a new config symbol:
CAN_RX_OFFLOAD.

The drivers relying on CAN rx offload are in different sub
folders. Make CAN_RX_OFFLOAD an hidden option and tag all the drivers
depending on that feature with "select CAN_RX_OFFLOAD" so that the
option gets automatically enabled if and only if one of those drivers
is chosen.

Link: https://lore.kernel.org/all/20220610143009.323579-5-mailhol.vincent@wanadoo.fr
Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Acked-by: Max Staudt <max@enpas.org>
Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig
index 87470fe..5335f3a 100644 (file)
--- a/drivers/net/can/Kconfig
+++ b/drivers/net/can/Kconfig
@@ -102,6 +102,9 @@ config CAN_CALC_BITTIMING
 
          If unsure, say Y.
 
+config CAN_RX_OFFLOAD
+       bool
+
 config CAN_AT91
        tristate "Atmel AT91 onchip CAN controller"
        depends on (ARCH_AT91 || COMPILE_TEST) && HAS_IOMEM
@@ -113,6 +116,7 @@ config CAN_FLEXCAN
        tristate "Support for Freescale FLEXCAN based chips"
        depends on OF || COLDFIRE || COMPILE_TEST
        depends on HAS_IOMEM
+       select CAN_RX_OFFLOAD
        help
          Say Y here if you want to support for Freescale FlexCAN.
 
@@ -162,6 +166,7 @@ config CAN_SUN4I
 config CAN_TI_HECC
        depends on ARM
        tristate "TI High End CAN Controller"
+       select CAN_RX_OFFLOAD
        help
          Driver for TI HECC (High End CAN Controller) module found on many
          TI devices. The device specifications are available from www.ti.com

diff --git a/drivers/net/can/dev/Makefile b/drivers/net/can/dev/Makefile
index 791e6b2..633687d 100644 (file)
--- a/drivers/net/can/dev/Makefile
+++ b/drivers/net/can/dev/Makefile
@@ -9,4 +9,4 @@ can-dev-$(CONFIG_CAN_NETLINK) += bittiming.o
 can-dev-$(CONFIG_CAN_NETLINK) += dev.o
 can-dev-$(CONFIG_CAN_NETLINK) += length.o
 can-dev-$(CONFIG_CAN_NETLINK) += netlink.o
-can-dev-$(CONFIG_CAN_NETLINK) += rx-offload.o
+can-dev-$(CONFIG_CAN_RX_OFFLOAD) += rx-offload.o

diff --git a/drivers/net/can/m_can/Kconfig b/drivers/net/can/m_can/Kconfig
index 45ad1b3..fc2afab 100644 (file)
--- a/drivers/net/can/m_can/Kconfig
+++ b/drivers/net/can/m_can/Kconfig
@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 menuconfig CAN_M_CAN
        tristate "Bosch M_CAN support"
+       select CAN_RX_OFFLOAD
        help
          Say Y here if you want support for Bosch M_CAN controller framework.
          This is common support for devices that embed the Bosch M_CAN IP.

diff --git a/drivers/net/can/spi/mcp251xfd/Kconfig b/drivers/net/can/spi/mcp251xfd/Kconfig
index dd0fc0a..877e435 100644 (file)
--- a/drivers/net/can/spi/mcp251xfd/Kconfig
+++ b/drivers/net/can/spi/mcp251xfd/Kconfig
@@ -2,6 +2,7 @@
 
 config CAN_MCP251XFD
        tristate "Microchip MCP251xFD SPI CAN controllers"
+       select CAN_RX_OFFLOAD
        select REGMAP
        select WANT_DEV_COREDUMP
        help