speed of 1000Mbps of the named network device.
Setting this value also immediately changes the LED state.
+What: /sys/class/leds/<led>/link_2500
+Date: Nov 2023
+KernelVersion: 6.8
+Contact: linux-leds@vger.kernel.org
+Description:
+ Signal the link speed state of 2500Mbps of the named network device.
+
+ If set to 0 (default), the LED's normal state is off.
+
+ If set to 1, the LED's normal state reflects the link state
+ speed of 2500Mbps of the named network device.
+ Setting this value also immediately changes the LED state.
+
+What: /sys/class/leds/<led>/link_5000
+Date: Nov 2023
+KernelVersion: 6.8
+Contact: linux-leds@vger.kernel.org
+Description:
+ Signal the link speed state of 5000Mbps of the named network device.
+
+ If set to 0 (default), the LED's normal state is off.
+
+ If set to 1, the LED's normal state reflects the link state
+ speed of 5000Mbps of the named network device.
+ Setting this value also immediately changes the LED state.
+
+What: /sys/class/leds/<led>/link_10000
+Date: Nov 2023
+KernelVersion: 6.8
+Contact: linux-leds@vger.kernel.org
+Description:
+ Signal the link speed state of 10000Mbps of the named network device.
+
+ If set to 0 (default), the LED's normal state is off.
+
+ If set to 1, the LED's normal state reflects the link state
+ speed of 10000Mbps of the named network device.
+ Setting this value also immediately changes the LED state.
+
What: /sys/class/leds/<led>/half_duplex
Date: Jun 2023
KernelVersion: 6.5
Contact: linux-leds@vger.kernel.org
Description:
Specifies the tty device name of the triggering tty
+
+What: /sys/class/leds/<led>/rx
+Date: February 2024
+KernelVersion: 6.8
+Description:
+ Signal reception (rx) of data on the named tty device.
+ If set to 0, the LED will not blink on reception.
+ If set to 1 (default), the LED will blink on reception.
+
+What: /sys/class/leds/<led>/tx
+Date: February 2024
+KernelVersion: 6.8
+Description:
+ Signal transmission (tx) of data on the named tty device.
+ If set to 0, the LED will not blink on transmission.
+ If set to 1 (default), the LED will blink on transmission.
+
+What: /sys/class/leds/<led>/cts
+Date: February 2024
+KernelVersion: 6.8
+Description:
+ CTS = Clear To Send
+ DCE is ready to accept data from the DTE.
+ If the line state is detected, the LED is switched on.
+ If set to 0 (default), the LED will not evaluate CTS.
+ If set to 1, the LED will evaluate CTS.
+
+What: /sys/class/leds/<led>/dsr
+Date: February 2024
+KernelVersion: 6.8
+Description:
+ DSR = Data Set Ready
+ DCE is ready to receive and send data.
+ If the line state is detected, the LED is switched on.
+ If set to 0 (default), the LED will not evaluate DSR.
+ If set to 1, the LED will evaluate DSR.
+
+What: /sys/class/leds/<led>/dcd
+Date: February 2024
+KernelVersion: 6.8
+Description:
+ DCD = Data Carrier Detect
+ DTE is receiving a carrier from the DCE.
+ If the line state is detected, the LED is switched on.
+ If set to 0 (default), the LED will not evaluate CAR (DCD).
+ If set to 1, the LED will evaluate CAR (DCD).
+
+What: /sys/class/leds/<led>/rng
+Date: February 2024
+KernelVersion: 6.8
+Description:
+ RNG = Ring Indicator
+ DCE has detected an incoming ring signal on the telephone
+ line. If the line state is detected, the LED is switched on.
+ If set to 0 (default), the LED will not evaluate RNG.
+ If set to 1, the LED will evaluate RNG.
--- /dev/null
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/allwinner,sun50i-a100-ledc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner A100 LED Controller
+
+maintainers:
+ - Samuel Holland <samuel@sholland.org>
+
+description:
+ The LED controller found in Allwinner sunxi SoCs uses a one-wire serial
+ interface to drive up to 1024 RGB LEDs.
+
+properties:
+ compatible:
+ oneOf:
+ - const: allwinner,sun50i-a100-ledc
+ - items:
+ - enum:
+ - allwinner,sun20i-d1-ledc
+ - allwinner,sun50i-r329-ledc
+ - const: allwinner,sun50i-a100-ledc
+
+ reg:
+ maxItems: 1
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ items:
+ - description: Bus clock
+ - description: Module clock
+
+ clock-names:
+ items:
+ - const: bus
+ - const: mod
+
+ resets:
+ maxItems: 1
+
+ dmas:
+ maxItems: 1
+ description: TX DMA channel
+
+ dma-names:
+ const: tx
+
+ allwinner,pixel-format:
+ description: Pixel format (subpixel transmission order), default is "grb"
+ enum:
+ - bgr
+ - brg
+ - gbr
+ - grb
+ - rbg
+ - rgb
+
+ allwinner,t0h-ns:
+ default: 336
+ description: Length of high pulse when transmitting a "0" bit
+
+ allwinner,t0l-ns:
+ default: 840
+ description: Length of low pulse when transmitting a "0" bit
+
+ allwinner,t1h-ns:
+ default: 882
+ description: Length of high pulse when transmitting a "1" bit
+
+ allwinner,t1l-ns:
+ default: 294
+ description: Length of low pulse when transmitting a "1" bit
+
+ allwinner,treset-ns:
+ default: 300000
+ description: Minimum delay between transmission frames
+
+patternProperties:
+ "^multi-led@[0-9a-f]+$":
+ type: object
+ $ref: leds-class-multicolor.yaml#
+ unevaluatedProperties: false
+ properties:
+ reg:
+ minimum: 0
+ maximum: 1023
+ description: Index of the LED in the series (must be contiguous)
+
+ required:
+ - reg
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+ - clock-names
+ - resets
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/leds/common.h>
+
+ ledc: led-controller@2008000 {
+ compatible = "allwinner,sun20i-d1-ledc",
+ "allwinner,sun50i-a100-ledc";
+ reg = <0x2008000 0x400>;
+ interrupts = <36 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&ccu 12>, <&ccu 34>;
+ clock-names = "bus", "mod";
+ resets = <&ccu 12>;
+ dmas = <&dma 42>;
+ dma-names = "tx";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ multi-led@0 {
+ reg = <0x0>;
+ color = <LED_COLOR_ID_RGB>;
+ function = LED_FUNCTION_INDICATOR;
+ };
+ };
+
+...
- Martin Kurbanov <mmkurbanov@sberdevices.ru>
description: |
- This controller is present on AW20036/AW20054/AW20072.
- It is a 3x12/6x9/6x12 matrix LED programmed via
- an I2C interface, up to 36/54/72 LEDs or 12/18/24 RGBs,
- 3 pattern controllers for auto breathing or group dimming control.
+ It is a matrix LED driver programmed via an I2C interface. Devices have
+ a set of individually controlled leds and support 3 pattern controllers
+ for auto breathing or group dimming control. Supported devices:
+ - AW20036 (3x12) 36 LEDs
+ - AW20054 (6x9) 54 LEDs
+ - AW20072 (6x12) 72 LEDs
+ - AW20108 (9x12) 108 LEDs
For more product information please see the link below:
aw20036 - https://www.awinic.com/en/productDetail/AW20036QNR#tech-docs
aw20054 - https://www.awinic.com/en/productDetail/AW20054QNR#tech-docs
aw20072 - https://www.awinic.com/en/productDetail/AW20072QNR#tech-docs
+ aw20108 - https://www.awinic.com/en/productDetail/AW20108QNR#tech-docs
properties:
compatible:
- awinic,aw20036
- awinic,aw20054
- awinic,aw20072
+ - awinic,aw20108
reg:
maxItems: 1
"#size-cells":
const: 0
- awinic,display-rows:
- $ref: /schemas/types.yaml#/definitions/uint32
- description:
- Leds matrix size
+ enable-gpios:
+ maxItems: 1
patternProperties:
- "^led@[0-9a-f]$":
+ "^led@[0-9a-f]+$":
type: object
$ref: common.yaml#
unevaluatedProperties: false
since the chip has a single global setting.
The maximum output current of each LED is calculated by the
following formula:
- IMAXled = 160000 * (592 / 600.5) * (1 / display-rows)
+ IMAXled = 160000 * (592 / 600.5) * (1 / max-current-switch-number)
And the minimum output current formula:
- IMINled = 3300 * (592 / 600.5) * (1 / display-rows)
-
-required:
- - compatible
- - reg
- - "#address-cells"
- - "#size-cells"
- - awinic,display-rows
+ IMINled = 3300 * (592 / 600.5) * (1 / max-current-switch-number)
+ where max-current-switch-number is determinated by led configuration
+ and depends on how leds are physically connected to the led driver.
allOf:
- if:
contains:
const: awinic,aw20036
then:
+ patternProperties:
+ "^led@[0-9a-f]+$":
+ properties:
+ reg:
+ items:
+ minimum: 0
+ maximum: 36
+
+ - if:
properties:
- awinic,display-rows:
- enum: [1, 2, 3]
- else:
+ compatible:
+ contains:
+ const: awinic,aw20054
+ then:
+ patternProperties:
+ "^led@[0-9a-f]+$":
+ properties:
+ reg:
+ items:
+ minimum: 0
+ maximum: 54
+
+ - if:
properties:
- awinic,display-rows:
- enum: [1, 2, 3, 4, 5, 6, 7]
+ compatible:
+ contains:
+ const: awinic,aw20072
+ then:
+ patternProperties:
+ "^led@[0-9a-f]+$":
+ properties:
+ reg:
+ items:
+ minimum: 0
+ maximum: 72
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: awinic,aw20108
+ then:
+ patternProperties:
+ "^led@[0-9a-f]+$":
+ properties:
+ reg:
+ items:
+ minimum: 0
+ maximum: 108
+
+required:
+ - compatible
+ - reg
+ - "#address-cells"
+ - "#size-cells"
additionalProperties: false
examples:
- |
+ #include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/leds/common.h>
i2c {
reg = <0x3a>;
#address-cells = <1>;
#size-cells = <0>;
- awinic,display-rows = <3>;
+ enable-gpios = <&gpio 3 GPIO_ACTIVE_HIGH>;
led@0 {
reg = <0x0>;
Note that this flag is mainly used for PWM-LEDs, where it is not possible
to map brightness to current. Drivers for other controllers should use
led-max-microamp.
- $ref: /schemas/types.yaml#definitions/uint32
+ $ref: /schemas/types.yaml#/definitions/uint32
panic-indicator:
description:
examples:
- |
#include <dt-bindings/leds/common.h>
- spmi {
+
+ pmic {
#address-cells = <1>;
#size-cells = <0>;
+
led-controller@ee00 {
compatible = "qcom,pm8350c-flash-led", "qcom,spmi-flash-led";
reg = <0xee00>;
Say Y to if your machine is a Dell Wyse 3020 thin client.
config LEDS_AW200XX
- tristate "LED support for Awinic AW20036/AW20054/AW20072"
+ tristate "LED support for Awinic AW20036/AW20054/AW20072/AW20108"
depends on LEDS_CLASS
depends on I2C
help
- This option enables support for the AW20036/AW20054/AW20072 LED driver.
- It is a 3x12/6x9/6x12 matrix LED driver programmed via
- an I2C interface, up to 36/54/72 LEDs or 12/18/24 RGBs,
- 3 pattern controllers for auto breathing or group dimming control.
+ This option enables support for the Awinic AW200XX LED controllers.
+ It is a matrix LED driver programmed via an I2C interface. Devices have
+ a set of individually controlled LEDs and support 3 pattern controllers
+ for auto breathing or group dimming control. Supported devices:
+ - AW20036 (3x12) 36 LEDs
+ - AW20054 (6x9) 54 LEDs
+ - AW20072 (6x12) 72 LEDs
+ - AW20108 (9x12) 108 LEDs
To compile this driver as a module, choose M here: the module
will be called leds-aw200xx.
config LEDS_AW2013
tristate "LED support for Awinic AW2013"
depends on LEDS_CLASS && I2C && OF
+ select REGMAP_I2C
help
This option enables support for the AW2013 3-channel
LED driver.
help
This option enables support for the Cobalt Raq series LEDs.
+config LEDS_SUN50I_A100
+ tristate "LED support for Allwinner A100 RGB LED controller"
+ depends on LEDS_CLASS_MULTICOLOR
+ depends on ARCH_SUNXI || COMPILE_TEST
+ help
+ This option enables support for the RGB LED controller found
+ in some Allwinner sunxi SoCs, including A100, R329, and D1.
+ It uses a one-wire interface to control up to 1024 LEDs.
+
config LEDS_SUNFIRE
tristate "LED support for SunFire servers."
depends on LEDS_CLASS
To compile this driver as a module, choose M here: the module will
be called leds-adp5520.
+config LEDS_MAX5970
+ tristate "LED Support for Maxim 5970"
+ depends on LEDS_CLASS
+ depends on MFD_MAX5970
+ help
+ This option enables support for the Maxim MAX5970 & MAX5978 smart
+ switch indication LEDs via the I2C bus.
+
+ To compile this driver as a module, choose M here: the module will
+ be called leds-max5970.
+
config LEDS_MC13783
tristate "LED Support for MC13XXX PMIC"
depends on LEDS_CLASS
obj-$(CONFIG_LEDS_LP8788) += leds-lp8788.o
obj-$(CONFIG_LEDS_LP8860) += leds-lp8860.o
obj-$(CONFIG_LEDS_LT3593) += leds-lt3593.o
+obj-$(CONFIG_LEDS_MAX5970) += leds-max5970.o
obj-$(CONFIG_LEDS_MAX77650) += leds-max77650.o
obj-$(CONFIG_LEDS_MAX8997) += leds-max8997.o
obj-$(CONFIG_LEDS_MC13783) += leds-mc13783.o
obj-$(CONFIG_LEDS_PWM) += leds-pwm.o
obj-$(CONFIG_LEDS_REGULATOR) += leds-regulator.o
obj-$(CONFIG_LEDS_SC27XX_BLTC) += leds-sc27xx-bltc.o
+obj-$(CONFIG_LEDS_SUN50I_A100) += leds-sun50i-a100.o
obj-$(CONFIG_LEDS_SUNFIRE) += leds-sunfire.o
obj-$(CONFIG_LEDS_SYSCON) += leds-syscon.o
obj-$(CONFIG_LEDS_TCA6507) += leds-tca6507.o
}
EXPORT_SYMBOL_GPL(led_trigger_set_default);
-void led_trigger_rename_static(const char *name, struct led_trigger *trig)
-{
- /* new name must be on a temporary string to prevent races */
- BUG_ON(name == trig->name);
-
- down_write(&triggers_list_lock);
- /* this assumes that trig->name was originaly allocated to
- * non constant storage */
- strcpy((char *)trig->name, name);
- up_write(&triggers_list_lock);
-}
-EXPORT_SYMBOL_GPL(led_trigger_rename_static);
-
/* LED Trigger Interface */
int led_trigger_register(struct led_trigger *trig)
// SPDX-License-Identifier: GPL-2.0
/*
- * Awinic AW20036/AW20054/AW20072 LED driver
+ * Awinic AW20036/AW20054/AW20072/AW20108 LED driver
*
* Copyright (c) 2023, SberDevices. All Rights Reserved.
*
#include <linux/bitfield.h>
#include <linux/bits.h>
#include <linux/container_of.h>
+#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/mod_devicetable.h>
#define AW200XX_LED2REG(x, columns) \
((x) + (((x) / (columns)) * (AW200XX_DSIZE_COLUMNS_MAX - (columns))))
+/* DIM current configuration register on page 1 */
+#define AW200XX_REG_DIM_PAGE1(x, columns) \
+ AW200XX_REG(AW200XX_PAGE1, AW200XX_LED2REG(x, columns))
+
/*
* DIM current configuration register (page 4).
* The even address for current DIM configuration.
#define AW200XX_REG_DIM(x, columns) \
AW200XX_REG(AW200XX_PAGE4, AW200XX_LED2REG(x, columns) * 2)
#define AW200XX_REG_DIM2FADE(x) ((x) + 1)
+#define AW200XX_REG_FADE2DIM(fade) \
+ DIV_ROUND_UP((fade) * AW200XX_DIM_MAX, AW200XX_FADE_MAX)
/*
* Duty ratio of display scan (see p.15 of datasheet for formula):
struct mutex mutex;
u32 num_leds;
u32 display_rows;
+ struct gpio_desc *hwen;
struct aw200xx_led leds[] __counted_by(num_leds);
};
if (dim >= 0) {
ret = regmap_write(chip->regmap,
- AW200XX_REG_DIM(led->num, columns), dim);
+ AW200XX_REG_DIM_PAGE1(led->num, columns),
+ dim);
if (ret)
goto out_unlock;
}
dim = led->dim;
if (dim < 0)
- dim = max_t(int,
- brightness / (AW200XX_FADE_MAX / AW200XX_DIM_MAX),
- 1);
+ dim = AW200XX_REG_FADE2DIM(brightness);
ret = regmap_write(chip->regmap, reg, dim);
if (ret)
if (ret)
return ret;
+ /* According to the datasheet software reset takes at least 1ms */
+ fsleep(1000);
+
regcache_mark_dirty(chip->regmap);
return regmap_write(chip->regmap, AW200XX_REG_FCD, AW200XX_FCD_CLEAR);
}
return 0;
}
+static void aw200xx_enable(const struct aw200xx *const chip)
+{
+ gpiod_set_value_cansleep(chip->hwen, 1);
+
+ /*
+ * After HWEN pin set high the chip begins to load the OTP information,
+ * which takes 200us to complete. About 200us wait time is needed for
+ * internal oscillator startup and display SRAM initialization. After
+ * display SRAM initialization, the registers in page1 to page5 can be
+ * configured via i2c interface.
+ */
+ fsleep(400);
+}
+
+static void aw200xx_disable(const struct aw200xx *const chip)
+{
+ return gpiod_set_value_cansleep(chip->hwen, 0);
+}
+
+static int aw200xx_probe_get_display_rows(struct device *dev,
+ struct aw200xx *chip)
+{
+ struct fwnode_handle *child;
+ u32 max_source = 0;
+
+ device_for_each_child_node(dev, child) {
+ u32 source;
+ int ret;
+
+ ret = fwnode_property_read_u32(child, "reg", &source);
+ if (ret || source >= chip->cdef->channels)
+ continue;
+
+ max_source = max(max_source, source);
+ }
+
+ if (max_source == 0)
+ return -EINVAL;
+
+ chip->display_rows = max_source / chip->cdef->display_size_columns + 1;
+
+ return 0;
+}
+
static int aw200xx_probe_fw(struct device *dev, struct aw200xx *chip)
{
struct fwnode_handle *child;
int ret;
int i;
- ret = device_property_read_u32(dev, "awinic,display-rows",
- &chip->display_rows);
+ ret = aw200xx_probe_get_display_rows(dev, chip);
if (ret)
return dev_err_probe(dev, ret,
- "Failed to read 'display-rows' property\n");
-
- if (!chip->display_rows ||
- chip->display_rows > chip->cdef->display_size_rows_max) {
- return dev_err_probe(dev, -EINVAL,
- "Invalid leds display size %u\n",
- chip->display_rows);
- }
+ "No valid led definitions found\n");
current_max = aw200xx_imax_from_global(chip, AW200XX_IMAX_MAX_uA);
current_min = aw200xx_imax_from_global(chip, AW200XX_IMAX_MIN_uA);
led->num = source;
led->chip = chip;
led->cdev.brightness_set_blocking = aw200xx_brightness_set;
+ led->cdev.max_brightness = AW200XX_FADE_MAX;
led->cdev.groups = dim_groups;
init_data.fwnode = child;
.rd_table = &aw200xx_readable_table,
.wr_table = &aw200xx_writeable_table,
.cache_type = REGCACHE_MAPLE,
+ .disable_locking = true,
};
static int aw200xx_probe(struct i2c_client *client)
if (IS_ERR(chip->regmap))
return PTR_ERR(chip->regmap);
+ chip->hwen = devm_gpiod_get_optional(&client->dev, "enable",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(chip->hwen))
+ return dev_err_probe(&client->dev, PTR_ERR(chip->hwen),
+ "Cannot get enable GPIO");
+
+ aw200xx_enable(chip);
+
ret = aw200xx_chip_check(chip);
if (ret)
return ret;
ret = aw200xx_chip_init(chip);
out_unlock:
+ if (ret)
+ aw200xx_disable(chip);
+
mutex_unlock(&chip->mutex);
return ret;
}
struct aw200xx *chip = i2c_get_clientdata(client);
aw200xx_chip_reset(chip);
+ aw200xx_disable(chip);
mutex_destroy(&chip->mutex);
}
.display_size_columns = 12,
};
+static const struct aw200xx_chipdef aw20108_cdef = {
+ .channels = 108,
+ .display_size_rows_max = 9,
+ .display_size_columns = 12,
+};
+
static const struct i2c_device_id aw200xx_id[] = {
{ "aw20036" },
{ "aw20054" },
{ "aw20072" },
+ { "aw20108" },
{}
};
MODULE_DEVICE_TABLE(i2c, aw200xx_id);
{ .compatible = "awinic,aw20036", .data = &aw20036_cdef, },
{ .compatible = "awinic,aw20054", .data = &aw20054_cdef, },
{ .compatible = "awinic,aw20072", .data = &aw20072_cdef, },
+ { .compatible = "awinic,aw20108", .data = &aw20108_cdef, },
{}
};
MODULE_DEVICE_TABLE(of, aw200xx_match_table);
led.gpiod = devm_fwnode_gpiod_get(dev, child, NULL, GPIOD_ASIS,
NULL);
if (IS_ERR(led.gpiod)) {
+ dev_err_probe(dev, PTR_ERR(led.gpiod), "Failed to get GPIO '%pfw'\n",
+ child);
fwnode_handle_put(child);
return ERR_CAST(led.gpiod);
}
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device driver for leds in MAX5970 and MAX5978 IC
+ *
+ * Copyright (c) 2022 9elements GmbH
+ *
+ * Author: Patrick Rudolph <patrick.rudolph@9elements.com>
+ */
+
+#include <linux/bits.h>
+#include <linux/container_of.h>
+#include <linux/device.h>
+#include <linux/leds.h>
+#include <linux/mfd/max5970.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+
+#define ldev_to_maxled(c) container_of(c, struct max5970_led, cdev)
+
+struct max5970_led {
+ struct device *dev;
+ struct regmap *regmap;
+ struct led_classdev cdev;
+ unsigned int index;
+};
+
+static int max5970_led_set_brightness(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct max5970_led *ddata = ldev_to_maxled(cdev);
+ int ret, val;
+
+ /* Set/clear corresponding bit for given led index */
+ val = !brightness ? BIT(ddata->index) : 0;
+
+ ret = regmap_update_bits(ddata->regmap, MAX5970_REG_LED_FLASH, BIT(ddata->index), val);
+ if (ret < 0)
+ dev_err(cdev->dev, "failed to set brightness %d", ret);
+
+ return ret;
+}
+
+static int max5970_led_probe(struct platform_device *pdev)
+{
+ struct fwnode_handle *led_node, *child;
+ struct device *dev = &pdev->dev;
+ struct regmap *regmap;
+ struct max5970_led *ddata;
+ int ret = -ENODEV;
+
+ regmap = dev_get_regmap(dev->parent, NULL);
+ if (!regmap)
+ return -ENODEV;
+
+ led_node = device_get_named_child_node(dev->parent, "leds");
+ if (!led_node)
+ return -ENODEV;
+
+ fwnode_for_each_available_child_node(led_node, child) {
+ u32 reg;
+
+ if (fwnode_property_read_u32(child, "reg", ®))
+ continue;
+
+ if (reg >= MAX5970_NUM_LEDS) {
+ dev_err_probe(dev, -EINVAL, "invalid LED (%u >= %d)\n", reg, MAX5970_NUM_LEDS);
+ continue;
+ }
+
+ ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
+ if (!ddata) {
+ fwnode_handle_put(child);
+ return -ENOMEM;
+ }
+
+ ddata->index = reg;
+ ddata->regmap = regmap;
+ ddata->dev = dev;
+
+ if (fwnode_property_read_string(child, "label", &ddata->cdev.name))
+ ddata->cdev.name = fwnode_get_name(child);
+
+ ddata->cdev.max_brightness = 1;
+ ddata->cdev.brightness_set_blocking = max5970_led_set_brightness;
+ ddata->cdev.default_trigger = "none";
+
+ ret = devm_led_classdev_register(dev, &ddata->cdev);
+ if (ret < 0) {
+ fwnode_handle_put(child);
+ return dev_err_probe(dev, ret, "Failed to initialize LED %u\n", reg);
+ }
+ }
+
+ return ret;
+}
+
+static struct platform_driver max5970_led_driver = {
+ .driver = {
+ .name = "max5970-led",
+ },
+ .probe = max5970_led_probe,
+};
+module_platform_driver(max5970_led_driver);
+
+MODULE_AUTHOR("Patrick Rudolph <patrick.rudolph@9elements.com>");
+MODULE_AUTHOR("Naresh Solanki <Naresh.Solanki@9elements.com>");
+MODULE_DESCRIPTION("MAX5970_hot-swap controller LED driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021-2023 Samuel Holland <samuel@sholland.org>
+ *
+ * Partly based on drivers/leds/leds-turris-omnia.c, which is:
+ * Copyright (c) 2020 by Marek Behún <kabel@kernel.org>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/led-class-multicolor.h>
+#include <linux/leds.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/property.h>
+#include <linux/reset.h>
+#include <linux/spinlock.h>
+
+#define LEDC_CTRL_REG 0x0000
+#define LEDC_CTRL_REG_DATA_LENGTH GENMASK(28, 16)
+#define LEDC_CTRL_REG_RGB_MODE GENMASK(8, 6)
+#define LEDC_CTRL_REG_LEDC_EN BIT(0)
+#define LEDC_T01_TIMING_CTRL_REG 0x0004
+#define LEDC_T01_TIMING_CTRL_REG_T1H GENMASK(26, 21)
+#define LEDC_T01_TIMING_CTRL_REG_T1L GENMASK(20, 16)
+#define LEDC_T01_TIMING_CTRL_REG_T0H GENMASK(10, 6)
+#define LEDC_T01_TIMING_CTRL_REG_T0L GENMASK(5, 0)
+#define LEDC_RESET_TIMING_CTRL_REG 0x000c
+#define LEDC_RESET_TIMING_CTRL_REG_TR GENMASK(28, 16)
+#define LEDC_RESET_TIMING_CTRL_REG_LED_NUM GENMASK(9, 0)
+#define LEDC_DATA_REG 0x0014
+#define LEDC_DMA_CTRL_REG 0x0018
+#define LEDC_DMA_CTRL_REG_DMA_EN BIT(5)
+#define LEDC_DMA_CTRL_REG_FIFO_TRIG_LEVEL GENMASK(4, 0)
+#define LEDC_INT_CTRL_REG 0x001c
+#define LEDC_INT_CTRL_REG_GLOBAL_INT_EN BIT(5)
+#define LEDC_INT_CTRL_REG_FIFO_CPUREQ_INT_EN BIT(1)
+#define LEDC_INT_CTRL_REG_TRANS_FINISH_INT_EN BIT(0)
+#define LEDC_INT_STS_REG 0x0020
+#define LEDC_INT_STS_REG_FIFO_WLW GENMASK(15, 10)
+#define LEDC_INT_STS_REG_FIFO_CPUREQ_INT BIT(1)
+#define LEDC_INT_STS_REG_TRANS_FINISH_INT BIT(0)
+
+#define LEDC_FIFO_DEPTH 32U
+#define LEDC_MAX_LEDS 1024
+#define LEDC_CHANNELS_PER_LED 3 /* RGB */
+
+#define LEDS_TO_BYTES(n) ((n) * sizeof(u32))
+
+struct sun50i_a100_ledc_led {
+ struct led_classdev_mc mc_cdev;
+ struct mc_subled subled_info[LEDC_CHANNELS_PER_LED];
+ u32 addr;
+};
+
+#define to_ledc_led(mc) container_of(mc, struct sun50i_a100_ledc_led, mc_cdev)
+
+struct sun50i_a100_ledc_timing {
+ u32 t0h_ns;
+ u32 t0l_ns;
+ u32 t1h_ns;
+ u32 t1l_ns;
+ u32 treset_ns;
+};
+
+struct sun50i_a100_ledc {
+ struct device *dev;
+ void __iomem *base;
+ struct clk *bus_clk;
+ struct clk *mod_clk;
+ struct reset_control *reset;
+
+ u32 *buffer;
+ struct dma_chan *dma_chan;
+ dma_addr_t dma_handle;
+ unsigned int pio_length;
+ unsigned int pio_offset;
+
+ spinlock_t lock;
+ unsigned int next_length;
+ bool xfer_active;
+
+ u32 format;
+ struct sun50i_a100_ledc_timing timing;
+
+ u32 max_addr;
+ u32 num_leds;
+ struct sun50i_a100_ledc_led leds[] __counted_by(num_leds);
+};
+
+static int sun50i_a100_ledc_dma_xfer(struct sun50i_a100_ledc *priv, unsigned int length)
+{
+ struct dma_async_tx_descriptor *desc;
+ dma_cookie_t cookie;
+
+ desc = dmaengine_prep_slave_single(priv->dma_chan, priv->dma_handle,
+ LEDS_TO_BYTES(length), DMA_MEM_TO_DEV, 0);
+ if (!desc)
+ return -ENOMEM;
+
+ cookie = dmaengine_submit(desc);
+ if (dma_submit_error(cookie))
+ return -EIO;
+
+ dma_async_issue_pending(priv->dma_chan);
+
+ return 0;
+}
+
+static void sun50i_a100_ledc_pio_xfer(struct sun50i_a100_ledc *priv, unsigned int fifo_used)
+{
+ unsigned int burst, length, offset;
+ u32 control;
+
+ length = priv->pio_length;
+ offset = priv->pio_offset;
+ burst = min(length, LEDC_FIFO_DEPTH - fifo_used);
+
+ iowrite32_rep(priv->base + LEDC_DATA_REG, priv->buffer + offset, burst);
+
+ if (burst < length) {
+ priv->pio_length = length - burst;
+ priv->pio_offset = offset + burst;
+
+ if (!offset) {
+ control = readl(priv->base + LEDC_INT_CTRL_REG);
+ control |= LEDC_INT_CTRL_REG_FIFO_CPUREQ_INT_EN;
+ writel(control, priv->base + LEDC_INT_CTRL_REG);
+ }
+ } else {
+ /* Disable the request IRQ once all data is written. */
+ control = readl(priv->base + LEDC_INT_CTRL_REG);
+ control &= ~LEDC_INT_CTRL_REG_FIFO_CPUREQ_INT_EN;
+ writel(control, priv->base + LEDC_INT_CTRL_REG);
+ }
+}
+
+static void sun50i_a100_ledc_start_xfer(struct sun50i_a100_ledc *priv, unsigned int length)
+{
+ bool use_dma = false;
+ u32 control;
+
+ if (priv->dma_chan && length > LEDC_FIFO_DEPTH) {
+ int ret;
+
+ ret = sun50i_a100_ledc_dma_xfer(priv, length);
+ if (ret)
+ dev_warn(priv->dev, "Failed to set up DMA (%d), using PIO\n", ret);
+ else
+ use_dma = true;
+ }
+
+ /* The DMA trigger level must be at least the burst length. */
+ control = FIELD_PREP(LEDC_DMA_CTRL_REG_DMA_EN, use_dma) |
+ FIELD_PREP_CONST(LEDC_DMA_CTRL_REG_FIFO_TRIG_LEVEL, LEDC_FIFO_DEPTH / 2);
+ writel(control, priv->base + LEDC_DMA_CTRL_REG);
+
+ control = readl(priv->base + LEDC_CTRL_REG);
+ control &= ~LEDC_CTRL_REG_DATA_LENGTH;
+ control |= FIELD_PREP(LEDC_CTRL_REG_DATA_LENGTH, length) | LEDC_CTRL_REG_LEDC_EN;
+ writel(control, priv->base + LEDC_CTRL_REG);
+
+ if (!use_dma) {
+ /* The FIFO is empty when starting a new transfer. */
+ unsigned int fifo_used = 0;
+
+ priv->pio_length = length;
+ priv->pio_offset = 0;
+
+ sun50i_a100_ledc_pio_xfer(priv, fifo_used);
+ }
+}
+
+static irqreturn_t sun50i_a100_ledc_irq(int irq, void *data)
+{
+ struct sun50i_a100_ledc *priv = data;
+ u32 status;
+
+ status = readl(priv->base + LEDC_INT_STS_REG);
+
+ if (status & LEDC_INT_STS_REG_TRANS_FINISH_INT) {
+ unsigned int next_length;
+
+ spin_lock(&priv->lock);
+
+ /* If another transfer is queued, dequeue and start it. */
+ next_length = priv->next_length;
+ if (next_length)
+ priv->next_length = 0;
+ else
+ priv->xfer_active = false;
+
+ spin_unlock(&priv->lock);
+
+ if (next_length)
+ sun50i_a100_ledc_start_xfer(priv, next_length);
+ } else if (status & LEDC_INT_STS_REG_FIFO_CPUREQ_INT) {
+ /* Continue the current transfer. */
+ sun50i_a100_ledc_pio_xfer(priv, FIELD_GET(LEDC_INT_STS_REG_FIFO_WLW, status));
+ }
+
+ /* Clear the W1C status bits. */
+ writel(status, priv->base + LEDC_INT_STS_REG);
+
+ return IRQ_HANDLED;
+}
+
+static void sun50i_a100_ledc_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct sun50i_a100_ledc *priv = dev_get_drvdata(cdev->dev->parent);
+ struct led_classdev_mc *mc_cdev = lcdev_to_mccdev(cdev);
+ struct sun50i_a100_ledc_led *led = to_ledc_led(mc_cdev);
+ unsigned int next_length;
+ unsigned long flags;
+ bool xfer_active;
+
+ led_mc_calc_color_components(mc_cdev, brightness);
+
+ priv->buffer[led->addr] = led->subled_info[0].brightness << 16 |
+ led->subled_info[1].brightness << 8 |
+ led->subled_info[2].brightness;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ /* Start, enqueue, or extend an enqueued transfer, as appropriate. */
+ next_length = max(priv->next_length, led->addr + 1);
+ xfer_active = priv->xfer_active;
+ if (xfer_active)
+ priv->next_length = next_length;
+ else
+ priv->xfer_active = true;
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ if (!xfer_active)
+ sun50i_a100_ledc_start_xfer(priv, next_length);
+}
+
+static const char *const sun50i_a100_ledc_formats[] = {
+ "rgb", "rbg", "grb", "gbr", "brg", "bgr",
+};
+
+static int sun50i_a100_ledc_parse_format(struct device *dev,
+ struct sun50i_a100_ledc *priv)
+{
+ const char *format = "grb";
+ u32 i;
+
+ device_property_read_string(dev, "allwinner,pixel-format", &format);
+
+ for (i = 0; i < ARRAY_SIZE(sun50i_a100_ledc_formats); i++) {
+ if (!strcmp(format, sun50i_a100_ledc_formats[i])) {
+ priv->format = i;
+ return 0;
+ }
+ }
+
+ return dev_err_probe(dev, -EINVAL, "Bad pixel format '%s'\n", format);
+}
+
+static void sun50i_a100_ledc_set_format(struct sun50i_a100_ledc *priv)
+{
+ u32 control;
+
+ control = readl(priv->base + LEDC_CTRL_REG);
+ control &= ~LEDC_CTRL_REG_RGB_MODE;
+ control |= FIELD_PREP(LEDC_CTRL_REG_RGB_MODE, priv->format);
+ writel(control, priv->base + LEDC_CTRL_REG);
+}
+
+static const struct sun50i_a100_ledc_timing sun50i_a100_ledc_default_timing = {
+ .t0h_ns = 336,
+ .t0l_ns = 840,
+ .t1h_ns = 882,
+ .t1l_ns = 294,
+ .treset_ns = 300000,
+};
+
+static int sun50i_a100_ledc_parse_timing(struct device *dev,
+ struct sun50i_a100_ledc *priv)
+{
+ struct sun50i_a100_ledc_timing *timing = &priv->timing;
+
+ *timing = sun50i_a100_ledc_default_timing;
+
+ device_property_read_u32(dev, "allwinner,t0h-ns", &timing->t0h_ns);
+ device_property_read_u32(dev, "allwinner,t0l-ns", &timing->t0l_ns);
+ device_property_read_u32(dev, "allwinner,t1h-ns", &timing->t1h_ns);
+ device_property_read_u32(dev, "allwinner,t1l-ns", &timing->t1l_ns);
+ device_property_read_u32(dev, "allwinner,treset-ns", &timing->treset_ns);
+
+ return 0;
+}
+
+static void sun50i_a100_ledc_set_timing(struct sun50i_a100_ledc *priv)
+{
+ const struct sun50i_a100_ledc_timing *timing = &priv->timing;
+ unsigned long mod_freq = clk_get_rate(priv->mod_clk);
+ u32 cycle_ns;
+ u32 control;
+
+ if (!mod_freq)
+ return;
+
+ cycle_ns = NSEC_PER_SEC / mod_freq;
+ control = FIELD_PREP(LEDC_T01_TIMING_CTRL_REG_T1H, timing->t1h_ns / cycle_ns) |
+ FIELD_PREP(LEDC_T01_TIMING_CTRL_REG_T1L, timing->t1l_ns / cycle_ns) |
+ FIELD_PREP(LEDC_T01_TIMING_CTRL_REG_T0H, timing->t0h_ns / cycle_ns) |
+ FIELD_PREP(LEDC_T01_TIMING_CTRL_REG_T0L, timing->t0l_ns / cycle_ns);
+ writel(control, priv->base + LEDC_T01_TIMING_CTRL_REG);
+
+ control = FIELD_PREP(LEDC_RESET_TIMING_CTRL_REG_TR, timing->treset_ns / cycle_ns) |
+ FIELD_PREP(LEDC_RESET_TIMING_CTRL_REG_LED_NUM, priv->max_addr);
+ writel(control, priv->base + LEDC_RESET_TIMING_CTRL_REG);
+}
+
+static int sun50i_a100_ledc_resume(struct device *dev)
+{
+ struct sun50i_a100_ledc *priv = dev_get_drvdata(dev);
+ int ret;
+
+ ret = reset_control_deassert(priv->reset);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(priv->bus_clk);
+ if (ret)
+ goto err_assert_reset;
+
+ ret = clk_prepare_enable(priv->mod_clk);
+ if (ret)
+ goto err_disable_bus_clk;
+
+ sun50i_a100_ledc_set_format(priv);
+ sun50i_a100_ledc_set_timing(priv);
+
+ writel(LEDC_INT_CTRL_REG_GLOBAL_INT_EN | LEDC_INT_CTRL_REG_TRANS_FINISH_INT_EN,
+ priv->base + LEDC_INT_CTRL_REG);
+
+ return 0;
+
+err_disable_bus_clk:
+ clk_disable_unprepare(priv->bus_clk);
+err_assert_reset:
+ reset_control_assert(priv->reset);
+
+ return ret;
+}
+
+static int sun50i_a100_ledc_suspend(struct device *dev)
+{
+ struct sun50i_a100_ledc *priv = dev_get_drvdata(dev);
+
+ /* Wait for all transfers to complete. */
+ for (;;) {
+ unsigned long flags;
+ bool xfer_active;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ xfer_active = priv->xfer_active;
+ spin_unlock_irqrestore(&priv->lock, flags);
+ if (!xfer_active)
+ break;
+
+ msleep(1);
+ }
+
+ clk_disable_unprepare(priv->mod_clk);
+ clk_disable_unprepare(priv->bus_clk);
+ reset_control_assert(priv->reset);
+
+ return 0;
+}
+
+static void sun50i_a100_ledc_dma_cleanup(void *data)
+{
+ struct sun50i_a100_ledc *priv = data;
+
+ dma_release_channel(priv->dma_chan);
+}
+
+static int sun50i_a100_ledc_probe(struct platform_device *pdev)
+{
+ struct dma_slave_config dma_cfg = {};
+ struct led_init_data init_data = {};
+ struct sun50i_a100_ledc_led *led;
+ struct device *dev = &pdev->dev;
+ struct sun50i_a100_ledc *priv;
+ struct fwnode_handle *child;
+ struct resource *mem;
+ u32 max_addr = 0;
+ u32 num_leds = 0;
+ int irq, ret;
+
+ /*
+ * The maximum LED address must be known in sun50i_a100_ledc_resume() before
+ * class device registration, so parse and validate the subnodes up front.
+ */
+ device_for_each_child_node(dev, child) {
+ u32 addr, color;
+
+ ret = fwnode_property_read_u32(child, "reg", &addr);
+ if (ret || addr >= LEDC_MAX_LEDS) {
+ fwnode_handle_put(child);
+ return dev_err_probe(dev, -EINVAL, "'reg' must be between 0 and %d\n",
+ LEDC_MAX_LEDS - 1);
+ }
+
+ ret = fwnode_property_read_u32(child, "color", &color);
+ if (ret || color != LED_COLOR_ID_RGB) {
+ fwnode_handle_put(child);
+ return dev_err_probe(dev, -EINVAL, "'color' must be LED_COLOR_ID_RGB\n");
+ }
+
+ max_addr = max(max_addr, addr);
+ num_leds++;
+ }
+
+ if (!num_leds)
+ return -ENODEV;
+
+ priv = devm_kzalloc(dev, struct_size(priv, leds, num_leds), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->dev = dev;
+ priv->max_addr = max_addr;
+ priv->num_leds = num_leds;
+ spin_lock_init(&priv->lock);
+ dev_set_drvdata(dev, priv);
+
+ ret = sun50i_a100_ledc_parse_format(dev, priv);
+ if (ret)
+ return ret;
+
+ ret = sun50i_a100_ledc_parse_timing(dev, priv);
+ if (ret)
+ return ret;
+
+ priv->base = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
+
+ priv->bus_clk = devm_clk_get(dev, "bus");
+ if (IS_ERR(priv->bus_clk))
+ return PTR_ERR(priv->bus_clk);
+
+ priv->mod_clk = devm_clk_get(dev, "mod");
+ if (IS_ERR(priv->mod_clk))
+ return PTR_ERR(priv->mod_clk);
+
+ priv->reset = devm_reset_control_get_exclusive(dev, NULL);
+ if (IS_ERR(priv->reset))
+ return PTR_ERR(priv->reset);
+
+ priv->dma_chan = dma_request_chan(dev, "tx");
+ if (IS_ERR(priv->dma_chan)) {
+ if (PTR_ERR(priv->dma_chan) != -ENODEV)
+ return PTR_ERR(priv->dma_chan);
+
+ priv->dma_chan = NULL;
+
+ priv->buffer = devm_kzalloc(dev, LEDS_TO_BYTES(LEDC_MAX_LEDS), GFP_KERNEL);
+ if (!priv->buffer)
+ return -ENOMEM;
+ } else {
+ ret = devm_add_action_or_reset(dev, sun50i_a100_ledc_dma_cleanup, priv);
+ if (ret)
+ return ret;
+
+ dma_cfg.dst_addr = mem->start + LEDC_DATA_REG;
+ dma_cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dma_cfg.dst_maxburst = LEDC_FIFO_DEPTH / 2;
+
+ ret = dmaengine_slave_config(priv->dma_chan, &dma_cfg);
+ if (ret)
+ return ret;
+
+ priv->buffer = dmam_alloc_attrs(dmaengine_get_dma_device(priv->dma_chan),
+ LEDS_TO_BYTES(LEDC_MAX_LEDS), &priv->dma_handle,
+ GFP_KERNEL, DMA_ATTR_WRITE_COMBINE);
+ if (!priv->buffer)
+ return -ENOMEM;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ ret = devm_request_irq(dev, irq, sun50i_a100_ledc_irq, 0, dev_name(dev), priv);
+ if (ret)
+ return ret;
+
+ ret = sun50i_a100_ledc_resume(dev);
+ if (ret)
+ return ret;
+
+ led = priv->leds;
+ device_for_each_child_node(dev, child) {
+ struct led_classdev *cdev;
+
+ /* The node was already validated above. */
+ fwnode_property_read_u32(child, "reg", &led->addr);
+
+ led->subled_info[0].color_index = LED_COLOR_ID_RED;
+ led->subled_info[0].channel = 0;
+ led->subled_info[1].color_index = LED_COLOR_ID_GREEN;
+ led->subled_info[1].channel = 1;
+ led->subled_info[2].color_index = LED_COLOR_ID_BLUE;
+ led->subled_info[2].channel = 2;
+
+ led->mc_cdev.num_colors = ARRAY_SIZE(led->subled_info);
+ led->mc_cdev.subled_info = led->subled_info;
+
+ cdev = &led->mc_cdev.led_cdev;
+ cdev->max_brightness = U8_MAX;
+ cdev->brightness_set = sun50i_a100_ledc_brightness_set;
+
+ init_data.fwnode = child;
+
+ ret = led_classdev_multicolor_register_ext(dev, &led->mc_cdev, &init_data);
+ if (ret) {
+ dev_err_probe(dev, ret, "Failed to register multicolor LED %u", led->addr);
+ goto err_put_child;
+ }
+
+ led++;
+ }
+
+ dev_info(dev, "Registered %u LEDs\n", num_leds);
+
+ return 0;
+
+err_put_child:
+ fwnode_handle_put(child);
+ while (led-- > priv->leds)
+ led_classdev_multicolor_unregister(&led->mc_cdev);
+ sun50i_a100_ledc_suspend(&pdev->dev);
+
+ return ret;
+}
+
+static void sun50i_a100_ledc_remove(struct platform_device *pdev)
+{
+ struct sun50i_a100_ledc *priv = platform_get_drvdata(pdev);
+
+ for (u32 i = 0; i < priv->num_leds; i++)
+ led_classdev_multicolor_unregister(&priv->leds[i].mc_cdev);
+ sun50i_a100_ledc_suspend(&pdev->dev);
+}
+
+static const struct of_device_id sun50i_a100_ledc_of_match[] = {
+ { .compatible = "allwinner,sun50i-a100-ledc" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, sun50i_a100_ledc_of_match);
+
+static DEFINE_SIMPLE_DEV_PM_OPS(sun50i_a100_ledc_pm,
+ sun50i_a100_ledc_suspend,
+ sun50i_a100_ledc_resume);
+
+static struct platform_driver sun50i_a100_ledc_driver = {
+ .probe = sun50i_a100_ledc_probe,
+ .remove_new = sun50i_a100_ledc_remove,
+ .shutdown = sun50i_a100_ledc_remove,
+ .driver = {
+ .name = "sun50i-a100-ledc",
+ .of_match_table = sun50i_a100_ledc_of_match,
+ .pm = pm_ptr(&sun50i_a100_ledc_pm),
+ },
+};
+module_platform_driver(sun50i_a100_ledc_driver);
+
+MODULE_AUTHOR("Samuel Holland <samuel@sholland.org>");
+MODULE_DESCRIPTION("Allwinner A100 LED controller driver");
+MODULE_LICENSE("GPL");
sled->map = map;
- if (of_property_read_u32(np, "offset", &sled->offset))
+ if (of_property_read_u32(np, "reg", &sled->offset) &&
+ of_property_read_u32(np, "offset", &sled->offset))
return -EINVAL;
if (of_property_read_u32(np, "mask", &sled->mask))
return -EINVAL;
tca->gpio.direction_output = tca6507_gpio_direction_output;
tca->gpio.set = tca6507_gpio_set_value;
tca->gpio.parent = dev;
- err = gpiochip_add_data(&tca->gpio, tca);
+ err = devm_gpiochip_add_data(dev, &tca->gpio, tca);
if (err) {
tca->gpio.ngpio = 0;
return err;
}
return 0;
}
-
-static void tca6507_remove_gpio(struct tca6507_chip *tca)
-{
- if (tca->gpio.ngpio)
- gpiochip_remove(&tca->gpio);
-}
#else /* CONFIG_GPIOLIB */
static int tca6507_probe_gpios(struct device *dev,
struct tca6507_chip *tca,
{
return 0;
}
-static void tca6507_remove_gpio(struct tca6507_chip *tca)
-{
-}
#endif /* CONFIG_GPIOLIB */
static struct tca6507_platform_data *
l->led_cdev.brightness_set = tca6507_brightness_set;
l->led_cdev.blink_set = tca6507_blink_set;
l->bank = -1;
- err = led_classdev_register(dev, &l->led_cdev);
+ err = devm_led_classdev_register(dev, &l->led_cdev);
if (err < 0)
- goto exit;
+ return err;
}
}
err = tca6507_probe_gpios(dev, tca, pdata);
if (err)
- goto exit;
+ return err;
/* set all registers to known state - zero */
tca->reg_set = 0x7f;
schedule_work(&tca->work);
return 0;
-exit:
- while (i--) {
- if (tca->leds[i].led_cdev.name)
- led_classdev_unregister(&tca->leds[i].led_cdev);
- }
- return err;
}
static void tca6507_remove(struct i2c_client *client)
{
- int i;
struct tca6507_chip *tca = i2c_get_clientdata(client);
- struct tca6507_led *tca_leds = tca->leds;
- for (i = 0; i < NUM_LEDS; i++) {
- if (tca_leds[i].led_cdev.name)
- led_classdev_unregister(&tca_leds[i].led_cdev);
- }
- tca6507_remove_gpio(tca);
cancel_work_sync(&tca->work);
}
config LEDS_GROUP_MULTICOLOR
tristate "LEDs group multi-color support"
- depends on OF || COMPILE_TEST
+ depends on OF
help
This option enables support for monochrome LEDs that are grouped
into multicolor LEDs which is useful in the case where LEDs of
ret = count;
goto err_malformed;
} else if (count != lpg->data->num_channels * 2) {
- dev_err(lpg->dev, "qcom,dtest needs to be %d items\n",
- lpg->data->num_channels * 2);
- return -EINVAL;
+ return dev_err_probe(lpg->dev, -EINVAL,
+ "qcom,dtest needs to be %d items\n",
+ lpg->data->num_channels * 2);
}
for (i = 0; i < lpg->data->num_channels; i++) {
return 0;
err_malformed:
- dev_err(lpg->dev, "malformed qcom,dtest\n");
- return ret;
+ return dev_err_probe(lpg->dev, ret, "malformed qcom,dtest\n");
}
static void lpg_apply_dtest(struct lpg_channel *chan)
return lpg_pattern_clear(led);
}
+static inline struct lpg *lpg_pwm_from_chip(struct pwm_chip *chip)
+{
+ return container_of(chip, struct lpg, pwm);
+}
+
static int lpg_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
{
- struct lpg *lpg = container_of(chip, struct lpg, pwm);
+ struct lpg *lpg = lpg_pwm_from_chip(chip);
struct lpg_channel *chan = &lpg->channels[pwm->hwpwm];
return chan->in_use ? -EBUSY : 0;
static int lpg_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
const struct pwm_state *state)
{
- struct lpg *lpg = container_of(chip, struct lpg, pwm);
+ struct lpg *lpg = lpg_pwm_from_chip(chip);
struct lpg_channel *chan = &lpg->channels[pwm->hwpwm];
int ret = 0;
static int lpg_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
struct pwm_state *state)
{
- struct lpg *lpg = container_of(chip, struct lpg, pwm);
+ struct lpg *lpg = lpg_pwm_from_chip(chip);
struct lpg_channel *chan = &lpg->channels[pwm->hwpwm];
unsigned int resolution;
unsigned int pre_div;
lpg->pwm.npwm = lpg->num_channels;
lpg->pwm.ops = &lpg_pwm_ops;
- ret = pwmchip_add(&lpg->pwm);
+ ret = devm_pwmchip_add(lpg->dev, &lpg->pwm);
if (ret)
- dev_err(lpg->dev, "failed to add PWM chip: ret %d\n", ret);
+ dev_err_probe(lpg->dev, ret, "failed to add PWM chip\n");
return ret;
}
int ret;
ret = of_property_read_u32(np, "reg", ®);
- if (ret || !reg || reg > lpg->num_channels) {
- dev_err(lpg->dev, "invalid \"reg\" of %pOFn\n", np);
- return -EINVAL;
- }
+ if (ret || !reg || reg > lpg->num_channels)
+ return dev_err_probe(lpg->dev, -EINVAL, "invalid \"reg\" of %pOFn\n", np);
chan = &lpg->channels[reg - 1];
chan->in_use = true;
ret = of_property_read_u32(np, "color", &color);
- if (ret < 0 && ret != -EINVAL) {
- dev_err(lpg->dev, "failed to parse \"color\" of %pOF\n", np);
- return ret;
- }
+ if (ret < 0 && ret != -EINVAL)
+ return dev_err_probe(lpg->dev, ret,
+ "failed to parse \"color\" of %pOF\n", np);
chan->color = color;
int i;
ret = of_property_read_u32(np, "color", &color);
- if (ret < 0 && ret != -EINVAL) {
- dev_err(lpg->dev, "failed to parse \"color\" of %pOF\n", np);
- return ret;
- }
+ if (ret < 0 && ret != -EINVAL)
+ return dev_err_probe(lpg->dev, ret,
+ "failed to parse \"color\" of %pOF\n", np);
if (color == LED_COLOR_ID_RGB)
num_channels = of_get_available_child_count(np);
else
ret = devm_led_classdev_register_ext(lpg->dev, &led->cdev, &init_data);
if (ret)
- dev_err(lpg->dev, "unable to register %s\n", cdev->name);
+ dev_err_probe(lpg->dev, ret, "unable to register %s\n", cdev->name);
return ret;
}
if (lpg->triled_has_src_sel) {
ret = of_property_read_u32(np, "qcom,power-source", &lpg->triled_src);
- if (ret || lpg->triled_src == 2 || lpg->triled_src > 3) {
- dev_err(lpg->dev, "invalid power source\n");
- return -EINVAL;
- }
+ if (ret || lpg->triled_src == 2 || lpg->triled_src > 3)
+ return dev_err_probe(lpg->dev, -EINVAL,
+ "invalid power source\n");
}
/* Disable automatic trickle charge LED */
if (!lpg->data)
return -EINVAL;
- platform_set_drvdata(pdev, lpg);
-
lpg->dev = &pdev->dev;
mutex_init(&lpg->lock);
return lpg_add_pwm(lpg);
}
-static void lpg_remove(struct platform_device *pdev)
-{
- struct lpg *lpg = platform_get_drvdata(pdev);
-
- pwmchip_remove(&lpg->pwm);
-}
-
static const struct lpg_data pm8916_pwm_data = {
.num_channels = 1,
.channels = (const struct lpg_channel_data[]) {
static struct platform_driver lpg_driver = {
.probe = lpg_probe,
- .remove_new = lpg_remove,
.driver = {
.name = "qcom-spmi-lpg",
.of_match_table = lpg_of_table,
return IRQ_HANDLED;
}
-static ssize_t gpio_trig_brightness_show(struct device *dev,
+static ssize_t desired_brightness_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gpio_trig_data *gpio_data = led_trigger_get_drvdata(dev);
- return sprintf(buf, "%u\n", gpio_data->desired_brightness);
+ return sysfs_emit(buf, "%u\n", gpio_data->desired_brightness);
}
-static ssize_t gpio_trig_brightness_store(struct device *dev,
+static ssize_t desired_brightness_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t n)
{
struct gpio_trig_data *gpio_data = led_trigger_get_drvdata(dev);
- unsigned desired_brightness;
+ u8 desired_brightness;
int ret;
- ret = sscanf(buf, "%u", &desired_brightness);
- if (ret < 1 || desired_brightness > 255) {
- dev_err(dev, "invalid value\n");
- return -EINVAL;
- }
+ ret = kstrtou8(buf, 10, &desired_brightness);
+ if (ret)
+ return ret;
gpio_data->desired_brightness = desired_brightness;
return n;
}
-static DEVICE_ATTR(desired_brightness, 0644, gpio_trig_brightness_show,
- gpio_trig_brightness_store);
+static DEVICE_ATTR_RW(desired_brightness);
static struct attribute *gpio_trig_attrs[] = {
&dev_attr_desired_brightness.attr,
* The generic property "trigger-sources" is followed,
* and we hope that this is a GPIO.
*/
- gpio_data->gpiod = fwnode_gpiod_get_index(dev->fwnode,
- "trigger-sources",
- 0, GPIOD_IN,
- "led-trigger");
+ gpio_data->gpiod = gpiod_get_optional(dev, "trigger-sources", GPIOD_IN);
if (IS_ERR(gpio_data->gpiod)) {
ret = PTR_ERR(gpio_data->gpiod);
kfree(gpio_data);
return -EINVAL;
}
+ gpiod_set_consumer_name(gpio_data->gpiod, "led-trigger");
+
gpio_data->led = led;
led_set_trigger_data(led, gpio_data);
* tx - LED blinks on transmitted data
* rx - LED blinks on receive data
*
+ * Note: If the user selects a mode that is not supported by hw, default
+ * behavior is to fall back to software control of the LED. However not every
+ * hw supports software control. LED callbacks brightness_set() and
+ * brightness_set_blocking() are NULL in this case. hw_control_is_supported()
+ * should use available means supported by hw to inform the user that selected
+ * mode isn't supported by hw. This could be switching off the LED or any
+ * hw blink mode. If software control fallback isn't possible, we return
+ * -EOPNOTSUPP to the user, but still store the selected mode. This is needed
+ * in case an intermediate unsupported mode is necessary to switch from one
+ * supported mode to another.
*/
struct led_netdev_data {
trigger_data->link_speed == SPEED_1000)
blink_on = true;
+ if (test_bit(TRIGGER_NETDEV_LINK_2500, &trigger_data->mode) &&
+ trigger_data->link_speed == SPEED_2500)
+ blink_on = true;
+
+ if (test_bit(TRIGGER_NETDEV_LINK_5000, &trigger_data->mode) &&
+ trigger_data->link_speed == SPEED_5000)
+ blink_on = true;
+
+ if (test_bit(TRIGGER_NETDEV_LINK_10000, &trigger_data->mode) &&
+ trigger_data->link_speed == SPEED_10000)
+ blink_on = true;
+
if (test_bit(TRIGGER_NETDEV_HALF_DUPLEX, &trigger_data->mode) &&
trigger_data->duplex == DUPLEX_HALF)
blink_on = true;
case TRIGGER_NETDEV_LINK_10:
case TRIGGER_NETDEV_LINK_100:
case TRIGGER_NETDEV_LINK_1000:
+ case TRIGGER_NETDEV_LINK_2500:
+ case TRIGGER_NETDEV_LINK_5000:
+ case TRIGGER_NETDEV_LINK_10000:
case TRIGGER_NETDEV_HALF_DUPLEX:
case TRIGGER_NETDEV_FULL_DUPLEX:
case TRIGGER_NETDEV_TX:
size_t size, enum led_trigger_netdev_modes attr)
{
struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
+ struct led_classdev *led_cdev = trigger_data->led_cdev;
unsigned long state, mode = trigger_data->mode;
int ret;
int bit;
case TRIGGER_NETDEV_LINK_10:
case TRIGGER_NETDEV_LINK_100:
case TRIGGER_NETDEV_LINK_1000:
+ case TRIGGER_NETDEV_LINK_2500:
+ case TRIGGER_NETDEV_LINK_5000:
+ case TRIGGER_NETDEV_LINK_10000:
case TRIGGER_NETDEV_HALF_DUPLEX:
case TRIGGER_NETDEV_FULL_DUPLEX:
case TRIGGER_NETDEV_TX:
if (test_bit(TRIGGER_NETDEV_LINK, &mode) &&
(test_bit(TRIGGER_NETDEV_LINK_10, &mode) ||
test_bit(TRIGGER_NETDEV_LINK_100, &mode) ||
- test_bit(TRIGGER_NETDEV_LINK_1000, &mode)))
+ test_bit(TRIGGER_NETDEV_LINK_1000, &mode) ||
+ test_bit(TRIGGER_NETDEV_LINK_2500, &mode) ||
+ test_bit(TRIGGER_NETDEV_LINK_5000, &mode) ||
+ test_bit(TRIGGER_NETDEV_LINK_10000, &mode)))
return -EINVAL;
cancel_delayed_work_sync(&trigger_data->work);
trigger_data->mode = mode;
trigger_data->hw_control = can_hw_control(trigger_data);
+ if (!led_cdev->brightness_set && !led_cdev->brightness_set_blocking &&
+ !trigger_data->hw_control)
+ return -EOPNOTSUPP;
+
set_baseline_state(trigger_data);
return size;
DEFINE_NETDEV_TRIGGER(link_10, TRIGGER_NETDEV_LINK_10);
DEFINE_NETDEV_TRIGGER(link_100, TRIGGER_NETDEV_LINK_100);
DEFINE_NETDEV_TRIGGER(link_1000, TRIGGER_NETDEV_LINK_1000);
+DEFINE_NETDEV_TRIGGER(link_2500, TRIGGER_NETDEV_LINK_2500);
+DEFINE_NETDEV_TRIGGER(link_5000, TRIGGER_NETDEV_LINK_5000);
+DEFINE_NETDEV_TRIGGER(link_10000, TRIGGER_NETDEV_LINK_10000);
DEFINE_NETDEV_TRIGGER(half_duplex, TRIGGER_NETDEV_HALF_DUPLEX);
DEFINE_NETDEV_TRIGGER(full_duplex, TRIGGER_NETDEV_FULL_DUPLEX);
DEFINE_NETDEV_TRIGGER(tx, TRIGGER_NETDEV_TX);
&dev_attr_link_10.attr,
&dev_attr_link_100.attr,
&dev_attr_link_1000.attr,
+ &dev_attr_link_2500.attr,
+ &dev_attr_link_5000.attr,
+ &dev_attr_link_10000.attr,
&dev_attr_full_duplex.attr,
&dev_attr_half_duplex.attr,
&dev_attr_rx.attr,
test_bit(TRIGGER_NETDEV_LINK_10, &trigger_data->mode) ||
test_bit(TRIGGER_NETDEV_LINK_100, &trigger_data->mode) ||
test_bit(TRIGGER_NETDEV_LINK_1000, &trigger_data->mode) ||
+ test_bit(TRIGGER_NETDEV_LINK_2500, &trigger_data->mode) ||
+ test_bit(TRIGGER_NETDEV_LINK_5000, &trigger_data->mode) ||
+ test_bit(TRIGGER_NETDEV_LINK_10000, &trigger_data->mode) ||
test_bit(TRIGGER_NETDEV_HALF_DUPLEX, &trigger_data->mode) ||
test_bit(TRIGGER_NETDEV_FULL_DUPLEX, &trigger_data->mode);
interval = jiffies_to_msecs(
static int __init ledtrig_panic_init(void)
{
+ led_trigger_register_simple("panic", &trigger);
+ if (!trigger)
+ return -ENOMEM;
+
atomic_notifier_chain_register(&panic_notifier_list,
&led_trigger_panic_nb);
- led_trigger_register_simple("panic", &trigger);
panic_blink = led_panic_blink;
return 0;
}
// SPDX-License-Identifier: GPL-2.0
+#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/leds.h>
#include <linux/module.h>
struct ledtrig_tty_data {
struct led_classdev *led_cdev;
struct delayed_work dwork;
- struct mutex mutex;
+ struct completion sysfs;
const char *ttyname;
struct tty_struct *tty;
int rx, tx;
+ bool mode_rx;
+ bool mode_tx;
+ bool mode_cts;
+ bool mode_dsr;
+ bool mode_dcd;
+ bool mode_rng;
};
-static void ledtrig_tty_restart(struct ledtrig_tty_data *trigger_data)
+/* Indicates which state the LED should now display */
+enum led_trigger_tty_state {
+ TTY_LED_BLINK,
+ TTY_LED_ENABLE,
+ TTY_LED_DISABLE,
+};
+
+enum led_trigger_tty_modes {
+ TRIGGER_TTY_RX = 0,
+ TRIGGER_TTY_TX,
+ TRIGGER_TTY_CTS,
+ TRIGGER_TTY_DSR,
+ TRIGGER_TTY_DCD,
+ TRIGGER_TTY_RNG,
+};
+
+static int ledtrig_tty_wait_for_completion(struct device *dev)
{
- schedule_delayed_work(&trigger_data->dwork, 0);
+ struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
+ int ret;
+
+ ret = wait_for_completion_timeout(&trigger_data->sysfs,
+ msecs_to_jiffies(LEDTRIG_TTY_INTERVAL * 20));
+ if (ret == 0)
+ return -ETIMEDOUT;
+
+ return ret;
}
static ssize_t ttyname_show(struct device *dev,
{
struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
ssize_t len = 0;
+ int completion;
- mutex_lock(&trigger_data->mutex);
+ reinit_completion(&trigger_data->sysfs);
+ completion = ledtrig_tty_wait_for_completion(dev);
+ if (completion < 0)
+ return completion;
if (trigger_data->ttyname)
len = sprintf(buf, "%s\n", trigger_data->ttyname);
- mutex_unlock(&trigger_data->mutex);
-
return len;
}
struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
char *ttyname;
ssize_t ret = size;
- bool running;
+ int completion;
if (size > 0 && buf[size - 1] == '\n')
size -= 1;
ttyname = NULL;
}
- mutex_lock(&trigger_data->mutex);
-
- running = trigger_data->ttyname != NULL;
+ reinit_completion(&trigger_data->sysfs);
+ completion = ledtrig_tty_wait_for_completion(dev);
+ if (completion < 0)
+ return completion;
kfree(trigger_data->ttyname);
tty_kref_put(trigger_data->tty);
trigger_data->ttyname = ttyname;
- mutex_unlock(&trigger_data->mutex);
-
- if (ttyname && !running)
- ledtrig_tty_restart(trigger_data);
-
return ret;
}
static DEVICE_ATTR_RW(ttyname);
+static ssize_t ledtrig_tty_attr_show(struct device *dev, char *buf,
+ enum led_trigger_tty_modes attr)
+{
+ struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
+ bool state;
+
+ switch (attr) {
+ case TRIGGER_TTY_RX:
+ state = trigger_data->mode_rx;
+ break;
+ case TRIGGER_TTY_TX:
+ state = trigger_data->mode_tx;
+ break;
+ case TRIGGER_TTY_CTS:
+ state = trigger_data->mode_cts;
+ break;
+ case TRIGGER_TTY_DSR:
+ state = trigger_data->mode_dsr;
+ break;
+ case TRIGGER_TTY_DCD:
+ state = trigger_data->mode_dcd;
+ break;
+ case TRIGGER_TTY_RNG:
+ state = trigger_data->mode_rng;
+ break;
+ }
+
+ return sysfs_emit(buf, "%u\n", state);
+}
+
+static ssize_t ledtrig_tty_attr_store(struct device *dev, const char *buf,
+ size_t size, enum led_trigger_tty_modes attr)
+{
+ struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
+ bool state;
+ int ret;
+
+ ret = kstrtobool(buf, &state);
+ if (ret)
+ return ret;
+
+ switch (attr) {
+ case TRIGGER_TTY_RX:
+ trigger_data->mode_rx = state;
+ break;
+ case TRIGGER_TTY_TX:
+ trigger_data->mode_tx = state;
+ break;
+ case TRIGGER_TTY_CTS:
+ trigger_data->mode_cts = state;
+ break;
+ case TRIGGER_TTY_DSR:
+ trigger_data->mode_dsr = state;
+ break;
+ case TRIGGER_TTY_DCD:
+ trigger_data->mode_dcd = state;
+ break;
+ case TRIGGER_TTY_RNG:
+ trigger_data->mode_rng = state;
+ break;
+ }
+
+ return size;
+}
+
+#define DEFINE_TTY_TRIGGER(trigger_name, trigger) \
+ static ssize_t trigger_name##_show(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+ { \
+ return ledtrig_tty_attr_show(dev, buf, trigger); \
+ } \
+ static ssize_t trigger_name##_store(struct device *dev, \
+ struct device_attribute *attr, const char *buf, size_t size) \
+ { \
+ return ledtrig_tty_attr_store(dev, buf, size, trigger); \
+ } \
+ static DEVICE_ATTR_RW(trigger_name)
+
+DEFINE_TTY_TRIGGER(rx, TRIGGER_TTY_RX);
+DEFINE_TTY_TRIGGER(tx, TRIGGER_TTY_TX);
+DEFINE_TTY_TRIGGER(cts, TRIGGER_TTY_CTS);
+DEFINE_TTY_TRIGGER(dsr, TRIGGER_TTY_DSR);
+DEFINE_TTY_TRIGGER(dcd, TRIGGER_TTY_DCD);
+DEFINE_TTY_TRIGGER(rng, TRIGGER_TTY_RNG);
+
static void ledtrig_tty_work(struct work_struct *work)
{
struct ledtrig_tty_data *trigger_data =
container_of(work, struct ledtrig_tty_data, dwork.work);
- struct serial_icounter_struct icount;
+ enum led_trigger_tty_state state = TTY_LED_DISABLE;
+ unsigned long interval = LEDTRIG_TTY_INTERVAL;
+ bool invert = false;
+ int status;
int ret;
- mutex_lock(&trigger_data->mutex);
-
- if (!trigger_data->ttyname) {
- /* exit without rescheduling */
- mutex_unlock(&trigger_data->mutex);
- return;
- }
+ if (!trigger_data->ttyname)
+ goto out;
/* try to get the tty corresponding to $ttyname */
if (!trigger_data->tty) {
trigger_data->tty = tty;
}
- ret = tty_get_icount(trigger_data->tty, &icount);
- if (ret) {
- dev_info(trigger_data->tty->dev, "Failed to get icount, stopped polling\n");
- mutex_unlock(&trigger_data->mutex);
- return;
+ status = tty_get_tiocm(trigger_data->tty);
+ if (status > 0) {
+ if (trigger_data->mode_cts) {
+ if (status & TIOCM_CTS)
+ state = TTY_LED_ENABLE;
+ }
+
+ if (trigger_data->mode_dsr) {
+ if (status & TIOCM_DSR)
+ state = TTY_LED_ENABLE;
+ }
+
+ if (trigger_data->mode_dcd) {
+ if (status & TIOCM_CAR)
+ state = TTY_LED_ENABLE;
+ }
+
+ if (trigger_data->mode_rng) {
+ if (status & TIOCM_RNG)
+ state = TTY_LED_ENABLE;
+ }
}
- if (icount.rx != trigger_data->rx ||
- icount.tx != trigger_data->tx) {
- unsigned long interval = LEDTRIG_TTY_INTERVAL;
+ /*
+ * The evaluation of rx/tx must be done after the evaluation
+ * of TIOCM_*, because rx/tx has priority.
+ */
+ if (trigger_data->mode_rx || trigger_data->mode_tx) {
+ struct serial_icounter_struct icount;
- led_blink_set_oneshot(trigger_data->led_cdev, &interval,
- &interval, 0);
+ ret = tty_get_icount(trigger_data->tty, &icount);
+ if (ret)
+ goto out;
- trigger_data->rx = icount.rx;
- trigger_data->tx = icount.tx;
+ if (trigger_data->mode_tx && (icount.tx != trigger_data->tx)) {
+ trigger_data->tx = icount.tx;
+ invert = state == TTY_LED_ENABLE;
+ state = TTY_LED_BLINK;
+ }
+
+ if (trigger_data->mode_rx && (icount.rx != trigger_data->rx)) {
+ trigger_data->rx = icount.rx;
+ invert = state == TTY_LED_ENABLE;
+ state = TTY_LED_BLINK;
+ }
}
out:
- mutex_unlock(&trigger_data->mutex);
+ switch (state) {
+ case TTY_LED_BLINK:
+ led_blink_set_oneshot(trigger_data->led_cdev, &interval,
+ &interval, invert);
+ break;
+ case TTY_LED_ENABLE:
+ led_set_brightness(trigger_data->led_cdev,
+ trigger_data->led_cdev->blink_brightness);
+ break;
+ case TTY_LED_DISABLE:
+ fallthrough;
+ default:
+ led_set_brightness(trigger_data->led_cdev, LED_OFF);
+ break;
+ }
+
+ complete_all(&trigger_data->sysfs);
schedule_delayed_work(&trigger_data->dwork,
msecs_to_jiffies(LEDTRIG_TTY_INTERVAL * 2));
}
static struct attribute *ledtrig_tty_attrs[] = {
&dev_attr_ttyname.attr,
+ &dev_attr_rx.attr,
+ &dev_attr_tx.attr,
+ &dev_attr_cts.attr,
+ &dev_attr_dsr.attr,
+ &dev_attr_dcd.attr,
+ &dev_attr_rng.attr,
NULL
};
ATTRIBUTE_GROUPS(ledtrig_tty);
if (!trigger_data)
return -ENOMEM;
+ /* Enable default rx/tx mode */
+ trigger_data->mode_rx = true;
+ trigger_data->mode_tx = true;
+
led_set_trigger_data(led_cdev, trigger_data);
INIT_DELAYED_WORK(&trigger_data->dwork, ledtrig_tty_work);
trigger_data->led_cdev = led_cdev;
- mutex_init(&trigger_data->mutex);
+ init_completion(&trigger_data->sysfs);
+
+ schedule_delayed_work(&trigger_data->dwork, 0);
return 0;
}
cancel_delayed_work_sync(&trigger_data->dwork);
+ kfree(trigger_data->ttyname);
+ tty_kref_put(trigger_data->tty);
+ trigger_data->tty = NULL;
+
kfree(trigger_data);
}
return retval;
}
+/**
+ * tty_get_tiocm - get tiocm status register
+ * @tty: tty device
+ *
+ * Obtain the modem status bits from the tty driver if the feature
+ * is supported.
+ */
+int tty_get_tiocm(struct tty_struct *tty)
+{
+ int retval = -ENOTTY;
+
+ if (tty->ops->tiocmget)
+ retval = tty->ops->tiocmget(tty);
+
+ return retval;
+}
+EXPORT_SYMBOL_GPL(tty_get_tiocm);
+
/**
* tty_tiocmget - get modem status
* @tty: tty device
*/
static int tty_tiocmget(struct tty_struct *tty, int __user *p)
{
- int retval = -ENOTTY;
+ int retval;
- if (tty->ops->tiocmget) {
- retval = tty->ops->tiocmget(tty);
+ retval = tty_get_tiocm(tty);
+ if (retval >= 0)
+ retval = put_user(retval, p);
- if (retval >= 0)
- retval = put_user(retval, p);
- }
return retval;
}
return led_cdev->trigger_data;
}
-/**
- * led_trigger_rename_static - rename a trigger
- * @name: the new trigger name
- * @trig: the LED trigger to rename
- *
- * Change a LED trigger name by copying the string passed in
- * name into current trigger name, which MUST be large
- * enough for the new string.
- *
- * Note that name must NOT point to the same string used
- * during LED registration, as that could lead to races.
- *
- * This is meant to be used on triggers with statically
- * allocated name.
- */
-void led_trigger_rename_static(const char *name, struct led_trigger *trig);
-
#define module_led_trigger(__led_trigger) \
module_driver(__led_trigger, led_trigger_register, \
led_trigger_unregister)
TRIGGER_NETDEV_LINK_10,
TRIGGER_NETDEV_LINK_100,
TRIGGER_NETDEV_LINK_1000,
+ TRIGGER_NETDEV_LINK_2500,
+ TRIGGER_NETDEV_LINK_5000,
+ TRIGGER_NETDEV_LINK_10000,
TRIGGER_NETDEV_HALF_DUPLEX,
TRIGGER_NETDEV_FULL_DUPLEX,
TRIGGER_NETDEV_TX,
int tty_do_resize(struct tty_struct *tty, struct winsize *ws);
int tty_get_icount(struct tty_struct *tty,
struct serial_icounter_struct *icount);
+int tty_get_tiocm(struct tty_struct *tty);
int is_current_pgrp_orphaned(void);
void tty_hangup(struct tty_struct *tty);
void tty_vhangup(struct tty_struct *tty);
projects / linux-2.6-microblaze.git / commitdiff