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path: root/drivers/leds/leds-lp8860.c
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Diffstat (limited to 'drivers/leds/leds-lp8860.c')
-rw-r--r--drivers/leds/leds-lp8860.c66
1 files changed, 45 insertions, 21 deletions
diff --git a/drivers/leds/leds-lp8860.c b/drivers/leds/leds-lp8860.c
index 3e70775a2d54..39c72a908f3b 100644
--- a/drivers/leds/leds-lp8860.c
+++ b/drivers/leds/leds-lp8860.c
@@ -22,6 +22,7 @@
#include <linux/of_gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/slab.h>
+#include <uapi/linux/uleds.h>
#define LP8860_DISP_CL1_BRT_MSB 0x00
#define LP8860_DISP_CL1_BRT_LSB 0x01
@@ -86,8 +87,6 @@
#define LP8860_CLEAR_FAULTS 0x01
-#define LP8860_DISP_LED_NAME "display_cluster"
-
/**
* struct lp8860_led -
* @lock - Lock for reading/writing the device
@@ -98,7 +97,7 @@
* @enable_gpio - VDDIO/EN gpio to enable communication interface
* @regulator - LED supply regulator pointer
* @label - LED label
-**/
+ */
struct lp8860_led {
struct mutex lock;
struct i2c_client *client;
@@ -107,7 +106,7 @@ struct lp8860_led {
struct regmap *eeprom_regmap;
struct gpio_desc *enable_gpio;
struct regulator *regulator;
- const char *label;
+ char label[LED_MAX_NAME_SIZE];
};
struct lp8860_eeprom_reg {
@@ -247,6 +246,15 @@ static int lp8860_init(struct lp8860_led *led)
unsigned int read_buf;
int ret, i, reg_count;
+ if (led->regulator) {
+ ret = regulator_enable(led->regulator);
+ if (ret) {
+ dev_err(&led->client->dev,
+ "Failed to enable regulator\n");
+ return ret;
+ }
+ }
+
if (led->enable_gpio)
gpiod_direction_output(led->enable_gpio, 1);
@@ -282,12 +290,25 @@ static int lp8860_init(struct lp8860_led *led)
ret = regmap_write(led->regmap,
LP8860_EEPROM_CNTRL,
LP8860_PROGRAM_EEPROM);
- if (ret)
+ if (ret) {
dev_err(&led->client->dev, "Failed programming EEPROM\n");
+ goto out;
+ }
+
+ return ret;
+
out:
if (ret)
if (led->enable_gpio)
gpiod_direction_output(led->enable_gpio, 0);
+
+ if (led->regulator) {
+ ret = regulator_disable(led->regulator);
+ if (ret)
+ dev_err(&led->client->dev,
+ "Failed to disable regulator\n");
+ }
+
return ret;
}
@@ -365,19 +386,25 @@ static int lp8860_probe(struct i2c_client *client,
int ret;
struct lp8860_led *led;
struct device_node *np = client->dev.of_node;
+ struct device_node *child_node;
+ const char *name;
led = devm_kzalloc(&client->dev, sizeof(*led), GFP_KERNEL);
if (!led)
return -ENOMEM;
- led->label = LP8860_DISP_LED_NAME;
-
- if (client->dev.of_node) {
- ret = of_property_read_string(np, "label", &led->label);
- if (ret) {
- dev_err(&client->dev, "Missing label in dt\n");
- return -EINVAL;
- }
+ for_each_available_child_of_node(np, child_node) {
+ led->led_dev.default_trigger = of_get_property(child_node,
+ "linux,default-trigger",
+ NULL);
+
+ ret = of_property_read_string(child_node, "label", &name);
+ if (!ret)
+ snprintf(led->label, sizeof(led->label), "%s:%s",
+ id->name, name);
+ else
+ snprintf(led->label, sizeof(led->label),
+ "%s::display_cluster", id->name);
}
led->enable_gpio = devm_gpiod_get_optional(&client->dev,
@@ -394,7 +421,6 @@ static int lp8860_probe(struct i2c_client *client,
led->client = client;
led->led_dev.name = led->label;
- led->led_dev.max_brightness = LED_FULL;
led->led_dev.brightness_set_blocking = lp8860_brightness_set;
mutex_init(&led->lock);
@@ -421,7 +447,7 @@ static int lp8860_probe(struct i2c_client *client,
if (ret)
return ret;
- ret = led_classdev_register(&client->dev, &led->led_dev);
+ ret = devm_led_classdev_register(&client->dev, &led->led_dev);
if (ret) {
dev_err(&client->dev, "led register err: %d\n", ret);
return ret;
@@ -435,8 +461,6 @@ static int lp8860_remove(struct i2c_client *client)
struct lp8860_led *led = i2c_get_clientdata(client);
int ret;
- led_classdev_unregister(&led->led_dev);
-
if (led->enable_gpio)
gpiod_direction_output(led->enable_gpio, 0);
@@ -447,6 +471,8 @@ static int lp8860_remove(struct i2c_client *client)
"Failed to disable regulator\n");
}
+ mutex_destroy(&led->lock);
+
return 0;
}
@@ -456,18 +482,16 @@ static const struct i2c_device_id lp8860_id[] = {
};
MODULE_DEVICE_TABLE(i2c, lp8860_id);
-#ifdef CONFIG_OF
static const struct of_device_id of_lp8860_leds_match[] = {
{ .compatible = "ti,lp8860", },
{},
};
MODULE_DEVICE_TABLE(of, of_lp8860_leds_match);
-#endif
static struct i2c_driver lp8860_driver = {
.driver = {
.name = "lp8860",
- .of_match_table = of_match_ptr(of_lp8860_leds_match),
+ .of_match_table = of_lp8860_leds_match,
},
.probe = lp8860_probe,
.remove = lp8860_remove,
@@ -477,4 +501,4 @@ module_i2c_driver(lp8860_driver);
MODULE_DESCRIPTION("Texas Instruments LP8860 LED driver");
MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");