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-rw-r--r--Documentation/devicetree/bindings/leds/leds-pwm.txt50
-rw-r--r--Documentation/devicetree/bindings/leds/leds-pwm.yaml70
-rw-r--r--Documentation/leds/leds-class.rst10
-rw-r--r--drivers/leds/leds-lp50xx.c6
-rw-r--r--drivers/leds/leds-netxbig.c35
-rw-r--r--drivers/leds/leds-turris-omnia.c85
6 files changed, 139 insertions, 117 deletions
diff --git a/Documentation/devicetree/bindings/leds/leds-pwm.txt b/Documentation/devicetree/bindings/leds/leds-pwm.txt
deleted file mode 100644
index 6c6583c35f2f..000000000000
--- a/Documentation/devicetree/bindings/leds/leds-pwm.txt
+++ /dev/null
@@ -1,50 +0,0 @@
-LED connected to PWM
-
-Required properties:
-- compatible : should be "pwm-leds".
-
-Each LED is represented as a sub-node of the pwm-leds device. Each
-node's name represents the name of the corresponding LED.
-
-LED sub-node properties:
-- pwms : PWM property to point to the PWM device (phandle)/port (id) and to
- specify the period time to be used: <&phandle id period_ns>;
-- pwm-names : (optional) Name to be used by the PWM subsystem for the PWM device
- For the pwms and pwm-names property please refer to:
- Documentation/devicetree/bindings/pwm/pwm.txt
-- max-brightness : Maximum brightness possible for the LED
-- active-low : (optional) For PWMs where the LED is wired to supply
- rather than ground.
-- label : (optional)
- see Documentation/devicetree/bindings/leds/common.txt
-- linux,default-trigger : (optional)
- see Documentation/devicetree/bindings/leds/common.txt
-
-Example:
-
-twl_pwm: pwm {
- /* provides two PWMs (id 0, 1 for PWM1 and PWM2) */
- compatible = "ti,twl6030-pwm";
- #pwm-cells = <2>;
-};
-
-twl_pwmled: pwmled {
- /* provides one PWM (id 0 for Charing indicator LED) */
- compatible = "ti,twl6030-pwmled";
- #pwm-cells = <2>;
-};
-
-pwmleds {
- compatible = "pwm-leds";
- kpad {
- label = "omap4::keypad";
- pwms = <&twl_pwm 0 7812500>;
- max-brightness = <127>;
- };
-
- charging {
- label = "omap4:green:chrg";
- pwms = <&twl_pwmled 0 7812500>;
- max-brightness = <255>;
- };
-};
diff --git a/Documentation/devicetree/bindings/leds/leds-pwm.yaml b/Documentation/devicetree/bindings/leds/leds-pwm.yaml
new file mode 100644
index 000000000000..fe4d5fd25913
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-pwm.yaml
@@ -0,0 +1,70 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/leds-pwm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: LEDs connected to PWM
+
+maintainers:
+ - Pavel Machek <pavel@ucw.cz>
+
+description:
+ Each LED is represented as a sub-node of the pwm-leds device. Each
+ node's name represents the name of the corresponding LED.
+
+properties:
+ compatible:
+ const: pwm-leds
+
+patternProperties:
+ "^led(-[0-9a-f]+)?$":
+ type: object
+
+ $ref: common.yaml#
+
+ properties:
+ pwms:
+ maxItems: 1
+
+ pwm-names: true
+
+ max-brightness:
+ description:
+ Maximum brightness possible for the LED
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ active-low:
+ description:
+ For PWMs where the LED is wired to supply rather than ground.
+ type: boolean
+
+ required:
+ - pwms
+ - max-brightness
+
+additionalProperties: false
+
+examples:
+ - |
+
+ #include <dt-bindings/leds/common.h>
+
+ led-controller {
+ compatible = "pwm-leds";
+
+ led-1 {
+ label = "omap4::keypad";
+ pwms = <&twl_pwm 0 7812500>;
+ max-brightness = <127>;
+ };
+
+ led-2 {
+ color = <LED_COLOR_ID_GREEN>;
+ function = LED_FUNCTION_CHARGING;
+ pwms = <&twl_pwmled 0 7812500>;
+ max-brightness = <255>;
+ };
+ };
+
+...
diff --git a/Documentation/leds/leds-class.rst b/Documentation/leds/leds-class.rst
index a0708d3f3d0b..cd155ead8703 100644
--- a/Documentation/leds/leds-class.rst
+++ b/Documentation/leds/leds-class.rst
@@ -177,13 +177,3 @@ The LED Trigger core cannot be a module as the simple trigger functions
would cause nightmare dependency issues. I see this as a minor issue
compared to the benefits the simple trigger functionality brings. The
rest of the LED subsystem can be modular.
-
-
-Future Development
-==================
-
-At the moment, a trigger can't be created specifically for a single LED.
-There are a number of cases where a trigger might only be mappable to a
-particular LED (ACPI?). The addition of triggers provided by the LED driver
-should cover this option and be possible to add without breaking the
-current interface.
diff --git a/drivers/leds/leds-lp50xx.c b/drivers/leds/leds-lp50xx.c
index 5fb4f24aeb2e..f13117eed976 100644
--- a/drivers/leds/leds-lp50xx.c
+++ b/drivers/leds/leds-lp50xx.c
@@ -487,8 +487,10 @@ static int lp50xx_probe_dt(struct lp50xx *priv)
*/
mc_led_info = devm_kcalloc(priv->dev, LP50XX_LEDS_PER_MODULE,
sizeof(*mc_led_info), GFP_KERNEL);
- if (!mc_led_info)
- return -ENOMEM;
+ if (!mc_led_info) {
+ ret = -ENOMEM;
+ goto child_out;
+ }
fwnode_for_each_child_node(child, led_node) {
ret = fwnode_property_read_u32(led_node, "color",
diff --git a/drivers/leds/leds-netxbig.c b/drivers/leds/leds-netxbig.c
index e6fd47365b58..68fbf0b66fad 100644
--- a/drivers/leds/leds-netxbig.c
+++ b/drivers/leds/leds-netxbig.c
@@ -448,31 +448,39 @@ static int netxbig_leds_get_of_pdata(struct device *dev,
gpio_ext = devm_kzalloc(dev, sizeof(*gpio_ext), GFP_KERNEL);
if (!gpio_ext) {
of_node_put(gpio_ext_np);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto put_device;
}
ret = netxbig_gpio_ext_get(dev, gpio_ext_dev, gpio_ext);
of_node_put(gpio_ext_np);
if (ret)
- return ret;
+ goto put_device;
pdata->gpio_ext = gpio_ext;
/* Timers (optional) */
ret = of_property_count_u32_elems(np, "timers");
if (ret > 0) {
- if (ret % 3)
- return -EINVAL;
+ if (ret % 3) {
+ ret = -EINVAL;
+ goto put_device;
+ }
+
num_timers = ret / 3;
timers = devm_kcalloc(dev, num_timers, sizeof(*timers),
GFP_KERNEL);
- if (!timers)
- return -ENOMEM;
+ if (!timers) {
+ ret = -ENOMEM;
+ goto put_device;
+ }
for (i = 0; i < num_timers; i++) {
u32 tmp;
of_property_read_u32_index(np, "timers", 3 * i,
&timers[i].mode);
- if (timers[i].mode >= NETXBIG_LED_MODE_NUM)
- return -EINVAL;
+ if (timers[i].mode >= NETXBIG_LED_MODE_NUM) {
+ ret = -EINVAL;
+ goto put_device;
+ }
of_property_read_u32_index(np, "timers",
3 * i + 1, &tmp);
timers[i].delay_on = tmp;
@@ -488,12 +496,15 @@ static int netxbig_leds_get_of_pdata(struct device *dev,
num_leds = of_get_available_child_count(np);
if (!num_leds) {
dev_err(dev, "No LED subnodes found in DT\n");
- return -ENODEV;
+ ret = -ENODEV;
+ goto put_device;
}
leds = devm_kcalloc(dev, num_leds, sizeof(*leds), GFP_KERNEL);
- if (!leds)
- return -ENOMEM;
+ if (!leds) {
+ ret = -ENOMEM;
+ goto put_device;
+ }
led = leds;
for_each_available_child_of_node(np, child) {
@@ -574,6 +585,8 @@ static int netxbig_leds_get_of_pdata(struct device *dev,
err_node_put:
of_node_put(child);
+put_device:
+ put_device(gpio_ext_dev);
return ret;
}
diff --git a/drivers/leds/leds-turris-omnia.c b/drivers/leds/leds-turris-omnia.c
index 8c5bdc3847ee..7b2f4d0ae3fe 100644
--- a/drivers/leds/leds-turris-omnia.c
+++ b/drivers/leds/leds-turris-omnia.c
@@ -12,28 +12,20 @@
#include <linux/of.h>
#include "leds.h"
-#define OMNIA_BOARD_LEDS 12
-#define OMNIA_LED_NUM_CHANNELS 3
+#define OMNIA_BOARD_LEDS 12
+#define OMNIA_LED_NUM_CHANNELS 3
-#define CMD_LED_MODE 3
-#define CMD_LED_MODE_LED(l) ((l) & 0x0f)
-#define CMD_LED_MODE_USER 0x10
+#define CMD_LED_MODE 3
+#define CMD_LED_MODE_LED(l) ((l) & 0x0f)
+#define CMD_LED_MODE_USER 0x10
-#define CMD_LED_STATE 4
-#define CMD_LED_STATE_LED(l) ((l) & 0x0f)
-#define CMD_LED_STATE_ON 0x10
+#define CMD_LED_STATE 4
+#define CMD_LED_STATE_LED(l) ((l) & 0x0f)
+#define CMD_LED_STATE_ON 0x10
-#define CMD_LED_COLOR 5
-#define CMD_LED_SET_BRIGHTNESS 7
-#define CMD_LED_GET_BRIGHTNESS 8
-
-#define OMNIA_CMD 0
-
-#define OMNIA_CMD_LED_COLOR_LED 1
-#define OMNIA_CMD_LED_COLOR_R 2
-#define OMNIA_CMD_LED_COLOR_G 3
-#define OMNIA_CMD_LED_COLOR_B 4
-#define OMNIA_CMD_LED_COLOR_LEN 5
+#define CMD_LED_COLOR 5
+#define CMD_LED_SET_BRIGHTNESS 7
+#define CMD_LED_GET_BRIGHTNESS 8
struct omnia_led {
struct led_classdev_mc mc_cdev;
@@ -41,7 +33,7 @@ struct omnia_led {
int reg;
};
-#define to_omnia_led(l) container_of(l, struct omnia_led, mc_cdev)
+#define to_omnia_led(l) container_of(l, struct omnia_led, mc_cdev)
struct omnia_leds {
struct i2c_client *client;
@@ -55,21 +47,21 @@ static int omnia_led_brightness_set_blocking(struct led_classdev *cdev,
struct led_classdev_mc *mc_cdev = lcdev_to_mccdev(cdev);
struct omnia_leds *leds = dev_get_drvdata(cdev->dev->parent);
struct omnia_led *led = to_omnia_led(mc_cdev);
- u8 buf[OMNIA_CMD_LED_COLOR_LEN], state;
+ u8 buf[5], state;
int ret;
mutex_lock(&leds->lock);
led_mc_calc_color_components(&led->mc_cdev, brightness);
- buf[OMNIA_CMD] = CMD_LED_COLOR;
- buf[OMNIA_CMD_LED_COLOR_LED] = led->reg;
- buf[OMNIA_CMD_LED_COLOR_R] = mc_cdev->subled_info[0].brightness;
- buf[OMNIA_CMD_LED_COLOR_G] = mc_cdev->subled_info[1].brightness;
- buf[OMNIA_CMD_LED_COLOR_B] = mc_cdev->subled_info[2].brightness;
+ buf[0] = CMD_LED_COLOR;
+ buf[1] = led->reg;
+ buf[2] = mc_cdev->subled_info[0].brightness;
+ buf[3] = mc_cdev->subled_info[1].brightness;
+ buf[4] = mc_cdev->subled_info[2].brightness;
state = CMD_LED_STATE_LED(led->reg);
- if (buf[OMNIA_CMD_LED_COLOR_R] || buf[OMNIA_CMD_LED_COLOR_G] || buf[OMNIA_CMD_LED_COLOR_B])
+ if (buf[2] || buf[3] || buf[4])
state |= CMD_LED_STATE_ON;
ret = i2c_smbus_write_byte_data(leds->client, CMD_LED_STATE, state);
@@ -98,9 +90,9 @@ static int omnia_led_register(struct i2c_client *client, struct omnia_led *led,
}
ret = of_property_read_u32(np, "color", &color);
- if (ret || color != LED_COLOR_ID_MULTI) {
+ if (ret || color != LED_COLOR_ID_RGB) {
dev_warn(dev,
- "Node %pOF: must contain 'color' property with value LED_COLOR_ID_MULTI\n",
+ "Node %pOF: must contain 'color' property with value LED_COLOR_ID_RGB\n",
np);
return 0;
}
@@ -126,18 +118,21 @@ static int omnia_led_register(struct i2c_client *client, struct omnia_led *led,
CMD_LED_MODE_LED(led->reg) |
CMD_LED_MODE_USER);
if (ret < 0) {
- dev_err(dev, "Cannot set LED %pOF to software mode: %i\n", np, ret);
+ dev_err(dev, "Cannot set LED %pOF to software mode: %i\n", np,
+ ret);
return ret;
}
/* disable the LED */
- ret = i2c_smbus_write_byte_data(client, CMD_LED_STATE, CMD_LED_STATE_LED(led->reg));
+ ret = i2c_smbus_write_byte_data(client, CMD_LED_STATE,
+ CMD_LED_STATE_LED(led->reg));
if (ret < 0) {
dev_err(dev, "Cannot set LED %pOF brightness: %i\n", np, ret);
return ret;
}
- ret = devm_led_classdev_multicolor_register_ext(dev, &led->mc_cdev, &init_data);
+ ret = devm_led_classdev_multicolor_register_ext(dev, &led->mc_cdev,
+ &init_data);
if (ret < 0) {
dev_err(dev, "Cannot register LED %pOF: %i\n", np, ret);
return ret;
@@ -157,7 +152,8 @@ static int omnia_led_register(struct i2c_client *client, struct omnia_led *led,
* file lives in the device directory of the LED controller, not an individual
* LED, so it should not confuse users.
*/
-static ssize_t brightness_show(struct device *dev, struct device_attribute *a, char *buf)
+static ssize_t brightness_show(struct device *dev, struct device_attribute *a,
+ char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct omnia_leds *leds = i2c_get_clientdata(client);
@@ -173,22 +169,23 @@ static ssize_t brightness_show(struct device *dev, struct device_attribute *a, c
return sprintf(buf, "%d\n", ret);
}
-static ssize_t brightness_store(struct device *dev, struct device_attribute *a, const char *buf,
- size_t count)
+static ssize_t brightness_store(struct device *dev, struct device_attribute *a,
+ const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct omnia_leds *leds = i2c_get_clientdata(client);
- unsigned int brightness;
+ unsigned long brightness;
int ret;
- if (sscanf(buf, "%u", &brightness) != 1)
+ if (kstrtoul(buf, 10, &brightness))
return -EINVAL;
if (brightness > 100)
return -EINVAL;
mutex_lock(&leds->lock);
- ret = i2c_smbus_write_byte_data(client, CMD_LED_SET_BRIGHTNESS, (u8) brightness);
+ ret = i2c_smbus_write_byte_data(client, CMD_LED_SET_BRIGHTNESS,
+ (u8)brightness);
mutex_unlock(&leds->lock);
if (ret < 0)
@@ -250,18 +247,18 @@ static int omnia_leds_probe(struct i2c_client *client,
static int omnia_leds_remove(struct i2c_client *client)
{
- u8 buf[OMNIA_CMD_LED_COLOR_LEN];
+ u8 buf[5];
/* put all LEDs into default (HW triggered) mode */
i2c_smbus_write_byte_data(client, CMD_LED_MODE,
CMD_LED_MODE_LED(OMNIA_BOARD_LEDS));
/* set all LEDs color to [255, 255, 255] */
- buf[OMNIA_CMD] = CMD_LED_COLOR;
- buf[OMNIA_CMD_LED_COLOR_LED] = OMNIA_BOARD_LEDS;
- buf[OMNIA_CMD_LED_COLOR_R] = 255;
- buf[OMNIA_CMD_LED_COLOR_G] = 255;
- buf[OMNIA_CMD_LED_COLOR_B] = 255;
+ buf[0] = CMD_LED_COLOR;
+ buf[1] = OMNIA_BOARD_LEDS;
+ buf[2] = 255;
+ buf[3] = 255;
+ buf[4] = 255;
i2c_master_send(client, buf, 5);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 15:12:45 +0000