leds-lp55xx: use lp55xx common led registration function
LED class devices are registered in lp5521_register_leds() and
lp5523_register_leds().
Two separate functions are merged into consolidated lp55xx function,
lp55xx_register_leds().
Error handling fix:
Unregistering LEDS are handled in lp55xx_register_leds() when LED registration
failure occurs. So each driver error handler is changed to 'err_register_leds'
Chip dependency: 'brightness_work_fn' and 'set_led_current'
To make the structure abstract, both functions are configured in each driver.
Those functions should be done by each driver because register control is
chip-dependant work.
lp55xx_init_led: skeleton
Will be filled in next patch
Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
index dd4526e..dc58f41 100644
--- a/drivers/leds/leds-lp5521.c
+++ b/drivers/leds/leds-lp5521.c
@@ -738,44 +738,6 @@
return 0;
}
-static int lp5521_register_leds(struct lp5521_chip *chip)
-{
- struct lp5521_platform_data *pdata = chip->pdata;
- struct i2c_client *client = chip->client;
- int i;
- int led;
- int ret;
-
- /* Initialize leds */
- chip->num_channels = pdata->num_channels;
- chip->num_leds = 0;
- led = 0;
- for (i = 0; i < pdata->num_channels; i++) {
- /* Do not initialize channels that are not connected */
- if (pdata->led_config[i].led_current == 0)
- continue;
-
- ret = lp5521_init_led(&chip->leds[led], client, i, pdata);
- if (ret) {
- dev_err(&client->dev, "error initializing leds\n");
- return ret;
- }
- chip->num_leds++;
-
- chip->leds[led].id = led;
- /* Set initial LED current */
- lp5521_set_led_current(chip, led,
- chip->leds[led].led_current);
-
- INIT_WORK(&(chip->leds[led].brightness_work),
- lp5521_led_brightness_work);
-
- led++;
- }
-
- return 0;
-}
-
static void lp5521_unregister_leds(struct lp5521_chip *chip)
{
int i;
@@ -836,9 +798,9 @@
dev_info(&client->dev, "%s programmable led chip found\n", id->name);
- ret = lp5521_register_leds(old_chip);
+ ret = lp55xx_register_leds(led, chip);
if (ret)
- goto fail2;
+ goto err_register_leds;
ret = lp5521_register_sysfs(client);
if (ret) {
@@ -848,6 +810,7 @@
return ret;
fail2:
lp5521_unregister_leds(old_chip);
+err_register_leds:
lp55xx_deinit_device(chip);
err_init:
return ret;
diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
index 3f506e3..41ac502 100644
--- a/drivers/leds/leds-lp5523.c
+++ b/drivers/leds/leds-lp5523.c
@@ -822,46 +822,6 @@
return 0;
}
-static int lp5523_register_leds(struct lp5523_chip *chip, const char *name)
-{
- struct lp5523_platform_data *pdata = chip->pdata;
- struct i2c_client *client = chip->client;
- int i;
- int led;
- int ret;
-
- /* Initialize leds */
- chip->num_channels = pdata->num_channels;
- chip->num_leds = 0;
- led = 0;
- for (i = 0; i < pdata->num_channels; i++) {
- /* Do not initialize channels that are not connected */
- if (pdata->led_config[i].led_current == 0)
- continue;
-
- INIT_WORK(&chip->leds[led].brightness_work,
- lp5523_led_brightness_work);
-
- ret = lp5523_init_led(&chip->leds[led], &client->dev, i, pdata,
- name);
- if (ret) {
- dev_err(&client->dev, "error initializing leds\n");
- return ret;
- }
- chip->num_leds++;
-
- chip->leds[led].id = led;
- /* Set LED current */
- lp5523_write(client,
- LP5523_REG_LED_CURRENT_BASE + chip->leds[led].chan_nr,
- chip->leds[led].led_current);
-
- led++;
- }
-
- return 0;
-}
-
static void lp5523_unregister_leds(struct lp5523_chip *chip)
{
int i;
@@ -922,9 +882,9 @@
dev_info(&client->dev, "%s Programmable led chip found\n", id->name);
- ret = lp5523_register_leds(old_chip, id->name);
+ ret = lp55xx_register_leds(led, chip);
if (ret)
- goto fail2;
+ goto err_register_leds;
ret = lp5523_register_sysfs(client);
if (ret) {
@@ -934,6 +894,7 @@
return ret;
fail2:
lp5523_unregister_leds(old_chip);
+err_register_leds:
lp55xx_deinit_device(chip);
err_init:
return ret;
diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c
index bcabf2c..1fab1d1c 100644
--- a/drivers/leds/leds-lp55xx-common.c
+++ b/drivers/leds/leds-lp55xx-common.c
@@ -63,6 +63,12 @@
return cfg->post_init_device(chip);
}
+static int lp55xx_init_led(struct lp55xx_led *led,
+ struct lp55xx_chip *chip, int chan)
+{
+ return 0;
+}
+
int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val)
{
return i2c_smbus_write_byte_data(chip->cl, reg, val);
@@ -170,6 +176,55 @@
}
EXPORT_SYMBOL_GPL(lp55xx_deinit_device);
+int lp55xx_register_leds(struct lp55xx_led *led, struct lp55xx_chip *chip)
+{
+ struct lp55xx_platform_data *pdata = chip->pdata;
+ struct lp55xx_device_config *cfg = chip->cfg;
+ int num_channels = pdata->num_channels;
+ struct lp55xx_led *each;
+ u8 led_current;
+ int ret;
+ int i;
+
+ if (!cfg->brightness_work_fn) {
+ dev_err(&chip->cl->dev, "empty brightness configuration\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < num_channels; i++) {
+
+ /* do not initialize channels that are not connected */
+ if (pdata->led_config[i].led_current == 0)
+ continue;
+
+ led_current = pdata->led_config[i].led_current;
+ each = led + i;
+ ret = lp55xx_init_led(each, chip, i);
+ if (ret)
+ goto err_init_led;
+
+ INIT_WORK(&each->brightness_work, cfg->brightness_work_fn);
+
+ chip->num_leds++;
+ each->chip = chip;
+
+ /* setting led current at each channel */
+ if (cfg->set_led_current)
+ cfg->set_led_current(each, led_current);
+ }
+
+ return 0;
+
+err_init_led:
+ for (i = 0; i < chip->num_leds; i++) {
+ each = led + i;
+ led_classdev_unregister(&each->cdev);
+ flush_work(&each->brightness_work);
+ }
+ return ret;
+}
+EXPORT_SYMBOL_GPL(lp55xx_register_leds);
+
MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
MODULE_DESCRIPTION("LP55xx Common Driver");
MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-lp55xx-common.h b/drivers/leds/leds-lp55xx-common.h
index 908b00a..219780a 100644
--- a/drivers/leds/leds-lp55xx-common.h
+++ b/drivers/leds/leds-lp55xx-common.h
@@ -33,6 +33,8 @@
* @reset : Chip specific reset command
* @enable : Chip specific enable command
* @post_init_device : Chip specific initialization code
+ * @brightness_work_fn : Brightness work function
+ * @set_led_current : LED current set function
*/
struct lp55xx_device_config {
const struct lp55xx_reg reset;
@@ -40,6 +42,12 @@
/* define if the device has specific initialization process */
int (*post_init_device) (struct lp55xx_chip *chip);
+
+ /* access brightness register */
+ void (*brightness_work_fn)(struct work_struct *work);
+
+ /* current setting function */
+ void (*set_led_current) (struct lp55xx_led *led, u8 led_current);
};
/*
@@ -88,4 +96,7 @@
extern int lp55xx_init_device(struct lp55xx_chip *chip);
extern void lp55xx_deinit_device(struct lp55xx_chip *chip);
+/* common LED class device functions */
+extern int lp55xx_register_leds(struct lp55xx_led *led,
+ struct lp55xx_chip *chip);
#endif /* _LEDS_LP55XX_COMMON_H */