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Subject[PATCH 12/33] leds-lp55xx: use lp55xx common led registration function
Date

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:
When LED registration failure occurs, device should be de-initialized
rather than unregistering LEDs.

This patch is not complete one because LED registration needs
additional patches. Please refer next patches.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
---
drivers/leds/leds-lp5521.c | 44 +++------------------------------
drivers/leds/leds-lp5523.c | 46 +++-------------------------------
drivers/leds/leds-lp55xx-common.c | 49 +++++++++++++++++++++++++++++++++++++
drivers/leds/leds-lp55xx-common.h | 3 +++
4 files changed, 58 insertions(+), 84 deletions(-)

diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
index 99f35b8..33c3110 100644
--- a/drivers/leds/leds-lp5521.c
+++ b/drivers/leds/leds-lp5521.c
@@ -733,44 +733,6 @@ static int __devinit lp5521_init_led(struct lp5521_led *led,
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;
@@ -831,9 +793,9 @@ static int __devinit lp5521_probe(struct i2c_client *client,

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) {
@@ -843,7 +805,7 @@ static int __devinit lp5521_probe(struct i2c_client *client,
return ret;
fail2:
lp5521_unregister_leds(old_chip);
-fail1:
+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 2f5213d..aa77f40 100644
--- a/drivers/leds/leds-lp5523.c
+++ b/drivers/leds/leds-lp5523.c
@@ -834,46 +834,6 @@ static int __devinit lp5523_init_led(struct lp5523_led *led, struct device *dev,
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;
@@ -934,9 +894,9 @@ static int __devinit lp5523_probe(struct i2c_client *client,

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) {
@@ -946,7 +906,7 @@ static int __devinit lp5523_probe(struct i2c_client *client,
return ret;
fail2:
lp5523_unregister_leds(old_chip);
-fail1:
+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 66ba500..55ac340 100644
--- a/drivers/leds/leds-lp55xx-common.c
+++ b/drivers/leds/leds-lp55xx-common.c
@@ -169,3 +169,52 @@ void lp55xx_deinit_device(struct lp55xx_chip *chip)
pdata->release_resources();
}
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);
diff --git a/drivers/leds/leds-lp55xx-common.h b/drivers/leds/leds-lp55xx-common.h
index 908b00a..8283906 100644
--- a/drivers/leds/leds-lp55xx-common.h
+++ b/drivers/leds/leds-lp55xx-common.h
@@ -88,4 +88,7 @@ extern int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg,
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 */
--
1.7.9.5

Best Regards,
Milo




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