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path: root/drivers/leds/leds-bd2802.c
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Diffstat (limited to 'drivers/leds/leds-bd2802.c')
-rw-r--r--drivers/leds/leds-bd2802.c96
1 files changed, 75 insertions, 21 deletions
diff --git a/drivers/leds/leds-bd2802.c b/drivers/leds/leds-bd2802.c
index 4149ecb3a9b2..779d7f262c04 100644
--- a/drivers/leds/leds-bd2802.c
+++ b/drivers/leds/leds-bd2802.c
@@ -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);
@@ -538,7 +588,6 @@ static int bd2802_register_led_classdev(struct bd2802_led *led)
led->cdev_led1r.brightness = LED_OFF;
led->cdev_led1r.brightness_set = bd2802_set_led1r_brightness;
led->cdev_led1r.blink_set = bd2802_set_led1r_blink;
- led->cdev_led1r.flags |= LED_CORE_SUSPENDRESUME;
ret = led_classdev_register(&led->client->dev, &led->cdev_led1r);
if (ret < 0) {
@@ -551,7 +600,6 @@ static int bd2802_register_led_classdev(struct bd2802_led *led)
led->cdev_led1g.brightness = LED_OFF;
led->cdev_led1g.brightness_set = bd2802_set_led1g_brightness;
led->cdev_led1g.blink_set = bd2802_set_led1g_blink;
- led->cdev_led1g.flags |= LED_CORE_SUSPENDRESUME;
ret = led_classdev_register(&led->client->dev, &led->cdev_led1g);
if (ret < 0) {
@@ -564,7 +612,6 @@ static int bd2802_register_led_classdev(struct bd2802_led *led)
led->cdev_led1b.brightness = LED_OFF;
led->cdev_led1b.brightness_set = bd2802_set_led1b_brightness;
led->cdev_led1b.blink_set = bd2802_set_led1b_blink;
- led->cdev_led1b.flags |= LED_CORE_SUSPENDRESUME;
ret = led_classdev_register(&led->client->dev, &led->cdev_led1b);
if (ret < 0) {
@@ -577,7 +624,6 @@ static int bd2802_register_led_classdev(struct bd2802_led *led)
led->cdev_led2r.brightness = LED_OFF;
led->cdev_led2r.brightness_set = bd2802_set_led2r_brightness;
led->cdev_led2r.blink_set = bd2802_set_led2r_blink;
- led->cdev_led2r.flags |= LED_CORE_SUSPENDRESUME;
ret = led_classdev_register(&led->client->dev, &led->cdev_led2r);
if (ret < 0) {
@@ -590,7 +636,6 @@ static int bd2802_register_led_classdev(struct bd2802_led *led)
led->cdev_led2g.brightness = LED_OFF;
led->cdev_led2g.brightness_set = bd2802_set_led2g_brightness;
led->cdev_led2g.blink_set = bd2802_set_led2g_blink;
- led->cdev_led2g.flags |= LED_CORE_SUSPENDRESUME;
ret = led_classdev_register(&led->client->dev, &led->cdev_led2g);
if (ret < 0) {
@@ -640,7 +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) {
@@ -670,13 +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);
- if (ret) {
- dev_err(&client->dev, "failed to create sysfs file %s\n",
- bd2802_adv_conf_attr.attr.name);
- goto failed_free;
+ for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++) {
+ ret = device_create_file(&led->client->dev,
+ bd2802_attributes[i]);
+ if (ret) {
+ 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);
@@ -686,7 +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);
@@ -697,12 +750,14 @@ failed_free:
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);
@@ -723,8 +778,7 @@ static int bd2802_resume(struct i2c_client *client)
struct bd2802_led *led = i2c_get_clientdata(client);
if (!bd2802_is_all_off(led) || led->adf_on) {
- gpio_set_value(led->pdata->reset_gpio, 1);
- udelay(100);
+ bd2802_reset_cancel(led);
bd2802_restore_state(led);
}
@@ -762,4 +816,4 @@ module_exit(bd2802_exit);
MODULE_AUTHOR("Kim Kyuwon <q1.kim@samsung.com>");
MODULE_DESCRIPTION("BD2802 LED driver");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.