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Commit 28c5fe99 authored by Felix Brack's avatar Felix Brack Committed by Jacek Anaszewski
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leds: pca9532: Extend pca9532 device tree support 



This patch extends the device tree support for the pca9532 by adding
the leds 'default-state' property.

Signed-off-by: default avatarFelix Brack <fb@ltec.ch>
Signed-off-by: default avatarJacek Anaszewski <jacek.anaszewski@gmail.com>
parent cd3b0b05

Documentation/devicetree/bindings/leds/leds-pca9532.txt

+10 −0
Original line number Diff line number Diff line
@@ -17,6 +17,8 @@ Optional sub-node properties: 
	- label: see Documentation/devicetree/bindings/leds/common.txt

	- type: Output configuration, see dt-bindings/leds/leds-pca9532.h (default NONE)

	- linux,default-trigger: see Documentation/devicetree/bindings/leds/common.txt

	- default-state: see Documentation/devicetree/bindings/leds/common.txt

	  This property is only valid for sub-nodes of type <PCA9532_TYPE_LED>.



Example:

  #include <dt-bindings/leds/leds-pca9532.h>
@@ -33,6 +35,14 @@ Example: 
      label = "pca:green:power";

      type = <PCA9532_TYPE_LED>;

    };

    kernel-booting {

      type = <PCA9532_TYPE_LED>;

      default-state = "on";

    };

    sys-stat {

      type = <PCA9532_TYPE_LED>;

      default-state = "keep"; // don't touch, was set by U-Boot

    };

  };



For more product information please see the link below:

drivers/leds/leds-pca9532.c

+26 −1
Original line number Diff line number Diff line
@@ -254,6 +254,21 @@ static void pca9532_input_work(struct work_struct *work) 
	mutex_unlock(&data->update_lock);

}



static enum pca9532_state pca9532_getled(struct pca9532_led *led)

{

	struct i2c_client *client = led->client;

	struct pca9532_data *data = i2c_get_clientdata(client);

	u8 maxleds = data->chip_info->num_leds;

	char reg;

	enum pca9532_state ret;



	mutex_lock(&data->update_lock);

	reg = i2c_smbus_read_byte_data(client, LED_REG(maxleds, led->id));

	ret = reg >> LED_NUM(led->id)/2;

	mutex_unlock(&data->update_lock);

	return ret;

}



#ifdef CONFIG_LEDS_PCA9532_GPIO

static int pca9532_gpio_request_pin(struct gpio_chip *gc, unsigned offset)

{
@@ -366,6 +381,9 @@ static int pca9532_configure(struct i2c_client *client, 
			gpios++;

			break;

		case PCA9532_TYPE_LED:

			if (pled->state == PCA9532_KEEP)

				led->state = pca9532_getled(led);

			else

				led->state = pled->state;

			led->name = pled->name;

			led->ldev.name = led->name;
@@ -456,6 +474,7 @@ pca9532_of_populate_pdata(struct device *dev, struct device_node *np) 
	const struct of_device_id *match;

	int devid, maxleds;

	int i = 0;

	const char *state;



	match = of_match_device(of_pca9532_leds_match, dev);

	if (!match)
@@ -475,6 +494,12 @@ pca9532_of_populate_pdata(struct device *dev, struct device_node *np) 
		of_property_read_u32(child, "type", &pdata->leds[i].type);

		of_property_read_string(child, "linux,default-trigger",

					&pdata->leds[i].default_trigger);

		if (!of_property_read_string(child, "default-state", &state)) {

			if (!strcmp(state, "on"))

				pdata->leds[i].state = PCA9532_ON;

			else if (!strcmp(state, "keep"))

				pdata->leds[i].state = PCA9532_KEEP;

		}

		if (++i >= maxleds) {

			of_node_put(child);

			break;

include/linux/leds-pca9532.h

+2 −2
Original line number Diff line number Diff line
@@ -22,7 +22,8 @@ enum pca9532_state { 
	PCA9532_OFF  = 0x0,

	PCA9532_ON   = 0x1,

	PCA9532_PWM0 = 0x2,

	PCA9532_PWM1 = 0x3

	PCA9532_PWM1 = 0x3,

	PCA9532_KEEP = 0xff,

};



struct pca9532_led {
@@ -44,4 +45,3 @@ struct pca9532_platform_data { 
};



#endif /* __LINUX_PCA9532_H */