Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 8792f7cf authored by Kim Kyuwon's avatar Kim Kyuwon Committed by Richard Purdie
Browse files

leds: add the sysfs interface into the leds-bd2802 driver for changing wave... 


leds: add the sysfs interface into the leds-bd2802 driver for changing wave pattern and led current.

Allow the user application to change the wave pattern and led current by
'wave_pattern' and 'rgb_current' sysfs files.

Signed-off-by: default avatarKim Kyuwon <q1.kim@samsung.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarRichard Purdie <rpurdie@linux.intel.com>
parent 1b18cf41

drivers/leds/leds-bd2802.c

+73 −13
Original line number Diff line number Diff line
@@ -97,6 +97,10 @@ struct bd2802_led { 
	enum led_ids			led_id;

	enum led_colors			color;

	enum led_bits			state;



	/* General attributes of RGB LEDs */

	int				wave_pattern;

	int				rgb_current;

};
@@ -254,7 +258,7 @@ static void bd2802_set_on(struct bd2802_led *led, enum led_ids id, 
		bd2802_reset_cancel(led);



	reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);

	bd2802_write_byte(led->client, reg, BD2802_CURRENT_032);

	bd2802_write_byte(led->client, reg, led->rgb_current);

	reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);

	bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);

	reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN);
@@ -275,9 +279,9 @@ static void bd2802_set_blink(struct bd2802_led *led, enum led_ids id, 
	reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);

	bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);

	reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);

	bd2802_write_byte(led->client, reg, BD2802_CURRENT_032);

	bd2802_write_byte(led->client, reg, led->rgb_current);

	reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN);

	bd2802_write_byte(led->client, reg, BD2802_PATTERN_HALF);

	bd2802_write_byte(led->client, reg, led->wave_pattern);



	bd2802_enable(led, id);

	bd2802_update_state(led, id, color, BD2802_BLINK);
@@ -406,7 +410,7 @@ static void bd2802_enable_adv_conf(struct bd2802_led *led) 
		ret = device_create_file(&led->client->dev,

						bd2802_addr_attributes[i]);

		if (ret) {

			dev_err(&led->client->dev, "failed to sysfs file %s\n",

			dev_err(&led->client->dev, "failed: sysfs file %s\n",

					bd2802_addr_attributes[i]->attr.name);

			goto failed_remove_files;

		}
@@ -483,6 +487,52 @@ static struct device_attribute bd2802_adv_conf_attr = { 
	.store = bd2802_store_adv_conf,

};



#define BD2802_CONTROL_ATTR(attr_name, name_str)			\

static ssize_t bd2802_show_##attr_name(struct device *dev,		\

	struct device_attribute *attr, char *buf)			\

{									\

	struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\

	ssize_t ret;							\

	down_read(&led->rwsem);						\

	ret = sprintf(buf, "0x%02x\n", led->attr_name);			\

	up_read(&led->rwsem);						\

	return ret;							\

}									\

static ssize_t bd2802_store_##attr_name(struct device *dev,		\

	struct device_attribute *attr, const char *buf, size_t count)	\

{									\

	struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\

	unsigned long val;						\

	int ret;							\

	if (!count)							\

		return -EINVAL;						\

	ret = strict_strtoul(buf, 16, &val);				\

	if (ret)							\

		return ret;						\

	down_write(&led->rwsem);					\

	led->attr_name = val;						\

	up_write(&led->rwsem);						\

	return count;							\

}									\

static struct device_attribute bd2802_##attr_name##_attr = {		\

	.attr = {							\

		.name = name_str,					\

		.mode = 0644,						\

		.owner = THIS_MODULE					\

	},								\

	.show = bd2802_show_##attr_name,				\

	.store = bd2802_store_##attr_name,				\

};



BD2802_CONTROL_ATTR(wave_pattern, "wave_pattern");

BD2802_CONTROL_ATTR(rgb_current, "rgb_current");



static struct device_attribute *bd2802_attributes[] = {

	&bd2802_adv_conf_attr,

	&bd2802_wave_pattern_attr,

	&bd2802_rgb_current_attr,

};



static void bd2802_led_work(struct work_struct *work)

{

	struct bd2802_led *led = container_of(work, struct bd2802_led, work);
@@ -635,7 +685,7 @@ static int __devinit bd2802_probe(struct i2c_client *client, 
{

	struct bd2802_led *led;

	struct bd2802_led_platform_data *pdata;

	int ret;

	int ret, i;



	led = kzalloc(sizeof(struct bd2802_led), GFP_KERNEL);

	if (!led) {
@@ -665,13 +715,20 @@ static int __devinit bd2802_probe(struct i2c_client *client, 
	/* To save the power, reset BD2802 after detecting */

	gpio_set_value(led->pdata->reset_gpio, 0);



	/* Default attributes */

	led->wave_pattern = BD2802_PATTERN_HALF;

	led->rgb_current = BD2802_CURRENT_032;



	init_rwsem(&led->rwsem);



	ret = device_create_file(&client->dev, &bd2802_adv_conf_attr);

	for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++) {

		ret = device_create_file(&led->client->dev,

						bd2802_attributes[i]);

		if (ret) {

		dev_err(&client->dev, "failed to create sysfs file %s\n",

					bd2802_adv_conf_attr.attr.name);

		goto failed_free;

			dev_err(&led->client->dev, "failed: sysfs file %s\n",

					bd2802_attributes[i]->attr.name);

			goto failed_unregister_dev_file;

		}

	}



	ret = bd2802_register_led_classdev(led);
@@ -681,7 +738,8 @@ static int __devinit bd2802_probe(struct i2c_client *client, 
	return 0;



failed_unregister_dev_file:

	device_remove_file(&client->dev, &bd2802_adv_conf_attr);

	for (i--; i >= 0; i--)

		device_remove_file(&led->client->dev, bd2802_attributes[i]);

failed_free:

	i2c_set_clientdata(client, NULL);

	kfree(led);
@@ -692,12 +750,14 @@ static int __devinit bd2802_probe(struct i2c_client *client, 
static int __exit bd2802_remove(struct i2c_client *client)

{

	struct bd2802_led *led = i2c_get_clientdata(client);

	int i;



	bd2802_unregister_led_classdev(led);

	gpio_set_value(led->pdata->reset_gpio, 0);

	bd2802_unregister_led_classdev(led);

	if (led->adf_on)

		bd2802_disable_adv_conf(led);

	device_remove_file(&client->dev, &bd2802_adv_conf_attr);

	for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++)

		device_remove_file(&led->client->dev, bd2802_attributes[i]);

	i2c_set_clientdata(client, NULL);

	kfree(led);