mirror of https://gitee.com/openkylin/linux.git
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>
This commit is contained in:
Milo(Woogyom) Kim
Bryan Wu
parent
6ce6176263
commit
9e9b3db1b2
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@ -738,44 +738,6 @@ static int lp5521_init_led(struct lp5521_led *led,
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return 0;
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}
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static int lp5521_register_leds(struct lp5521_chip *chip)
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{
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struct lp5521_platform_data *pdata = chip->pdata;
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struct i2c_client *client = chip->client;
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int i;
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int led;
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int ret;
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/* Initialize leds */
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chip->num_channels = pdata->num_channels;
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chip->num_leds = 0;
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led = 0;
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for (i = 0; i < pdata->num_channels; i++) {
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/* Do not initialize channels that are not connected */
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if (pdata->led_config[i].led_current == 0)
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continue;
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ret = lp5521_init_led(&chip->leds[led], client, i, pdata);
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if (ret) {
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dev_err(&client->dev, "error initializing leds\n");
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return ret;
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}
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chip->num_leds++;
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chip->leds[led].id = led;
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/* Set initial LED current */
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lp5521_set_led_current(chip, led,
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chip->leds[led].led_current);
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INIT_WORK(&(chip->leds[led].brightness_work),
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lp5521_led_brightness_work);
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led++;
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}
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return 0;
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}
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static void lp5521_unregister_leds(struct lp5521_chip *chip)
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{
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int i;
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@ -836,9 +798,9 @@ static int lp5521_probe(struct i2c_client *client,
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dev_info(&client->dev, "%s programmable led chip found\n", id->name);
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ret = lp5521_register_leds(old_chip);
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ret = lp55xx_register_leds(led, chip);
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if (ret)
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goto fail2;
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goto err_register_leds;
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ret = lp5521_register_sysfs(client);
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if (ret) {
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@ -848,6 +810,7 @@ static int lp5521_probe(struct i2c_client *client,
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return ret;
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fail2:
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lp5521_unregister_leds(old_chip);
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err_register_leds:
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lp55xx_deinit_device(chip);
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err_init:
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return ret;
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@ -822,46 +822,6 @@ static int lp5523_init_led(struct lp5523_led *led, struct device *dev,
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return 0;
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}
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static int lp5523_register_leds(struct lp5523_chip *chip, const char *name)
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{
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struct lp5523_platform_data *pdata = chip->pdata;
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struct i2c_client *client = chip->client;
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int i;
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int led;
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int ret;
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/* Initialize leds */
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chip->num_channels = pdata->num_channels;
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chip->num_leds = 0;
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led = 0;
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for (i = 0; i < pdata->num_channels; i++) {
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/* Do not initialize channels that are not connected */
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if (pdata->led_config[i].led_current == 0)
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continue;
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INIT_WORK(&chip->leds[led].brightness_work,
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lp5523_led_brightness_work);
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ret = lp5523_init_led(&chip->leds[led], &client->dev, i, pdata,
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name);
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if (ret) {
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dev_err(&client->dev, "error initializing leds\n");
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return ret;
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}
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chip->num_leds++;
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chip->leds[led].id = led;
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/* Set LED current */
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lp5523_write(client,
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LP5523_REG_LED_CURRENT_BASE + chip->leds[led].chan_nr,
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chip->leds[led].led_current);
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led++;
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}
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return 0;
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}
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static void lp5523_unregister_leds(struct lp5523_chip *chip)
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{
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int i;
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@ -922,9 +882,9 @@ static int lp5523_probe(struct i2c_client *client,
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dev_info(&client->dev, "%s Programmable led chip found\n", id->name);
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ret = lp5523_register_leds(old_chip, id->name);
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ret = lp55xx_register_leds(led, chip);
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if (ret)
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goto fail2;
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goto err_register_leds;
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ret = lp5523_register_sysfs(client);
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if (ret) {
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@ -934,6 +894,7 @@ static int lp5523_probe(struct i2c_client *client,
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return ret;
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fail2:
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lp5523_unregister_leds(old_chip);
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err_register_leds:
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lp55xx_deinit_device(chip);
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err_init:
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return ret;
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@ -63,6 +63,12 @@ static int lp55xx_post_init_device(struct lp55xx_chip *chip)
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return cfg->post_init_device(chip);
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}
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static int lp55xx_init_led(struct lp55xx_led *led,
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struct lp55xx_chip *chip, int chan)
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{
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return 0;
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}
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int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val)
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{
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return i2c_smbus_write_byte_data(chip->cl, reg, val);
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@ -170,6 +176,55 @@ void lp55xx_deinit_device(struct lp55xx_chip *chip)
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}
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EXPORT_SYMBOL_GPL(lp55xx_deinit_device);
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int lp55xx_register_leds(struct lp55xx_led *led, struct lp55xx_chip *chip)
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{
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struct lp55xx_platform_data *pdata = chip->pdata;
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struct lp55xx_device_config *cfg = chip->cfg;
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int num_channels = pdata->num_channels;
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struct lp55xx_led *each;
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u8 led_current;
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int ret;
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int i;
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if (!cfg->brightness_work_fn) {
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dev_err(&chip->cl->dev, "empty brightness configuration\n");
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return -EINVAL;
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}
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for (i = 0; i < num_channels; i++) {
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/* do not initialize channels that are not connected */
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if (pdata->led_config[i].led_current == 0)
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continue;
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led_current = pdata->led_config[i].led_current;
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each = led + i;
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ret = lp55xx_init_led(each, chip, i);
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if (ret)
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goto err_init_led;
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INIT_WORK(&each->brightness_work, cfg->brightness_work_fn);
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chip->num_leds++;
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each->chip = chip;
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/* setting led current at each channel */
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if (cfg->set_led_current)
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cfg->set_led_current(each, led_current);
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}
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return 0;
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err_init_led:
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for (i = 0; i < chip->num_leds; i++) {
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each = led + i;
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led_classdev_unregister(&each->cdev);
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flush_work(&each->brightness_work);
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}
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return ret;
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}
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EXPORT_SYMBOL_GPL(lp55xx_register_leds);
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MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
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MODULE_DESCRIPTION("LP55xx Common Driver");
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MODULE_LICENSE("GPL");
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@ -33,6 +33,8 @@ struct lp55xx_reg {
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* @reset : Chip specific reset command
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* @enable : Chip specific enable command
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* @post_init_device : Chip specific initialization code
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* @brightness_work_fn : Brightness work function
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* @set_led_current : LED current set function
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*/
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struct lp55xx_device_config {
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const struct lp55xx_reg reset;
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@ -40,6 +42,12 @@ struct lp55xx_device_config {
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/* define if the device has specific initialization process */
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int (*post_init_device) (struct lp55xx_chip *chip);
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/* access brightness register */
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void (*brightness_work_fn)(struct work_struct *work);
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/* current setting function */
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void (*set_led_current) (struct lp55xx_led *led, u8 led_current);
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};
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/*
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@ -88,4 +96,7 @@ extern int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg,
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extern int lp55xx_init_device(struct lp55xx_chip *chip);
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extern void lp55xx_deinit_device(struct lp55xx_chip *chip);
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/* common LED class device functions */
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extern int lp55xx_register_leds(struct lp55xx_led *led,
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struct lp55xx_chip *chip);
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#endif /* _LEDS_LP55XX_COMMON_H */
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