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author | Milo(Woogyom) Kim <milo.kim@ti.com> | 2013-02-05 19:06:27 +0900 |
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committer | Bryan Wu <cooloney@gmail.com> | 2013-02-06 15:59:28 -0800 |
commit | 9e9b3db1b2f725bacaf1b7e8708a0c78265bde97 (patch) | |
tree | 498353c79883feb33c7ea93dda7742eb7c1b7dcc /drivers/leds/leds-lp55xx-common.c | |
parent | 6ce6176263393dd80b9a537c1e1462b8529f240b (diff) | |
download | blackbird-op-linux-9e9b3db1b2f725bacaf1b7e8708a0c78265bde97.tar.gz blackbird-op-linux-9e9b3db1b2f725bacaf1b7e8708a0c78265bde97.zip |
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>
Diffstat (limited to 'drivers/leds/leds-lp55xx-common.c')
-rw-r--r-- | drivers/leds/leds-lp55xx-common.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c index bcabf2cb949a..1fab1d1c4502 100644 --- a/drivers/leds/leds-lp55xx-common.c +++ b/drivers/leds/leds-lp55xx-common.c @@ -63,6 +63,12 @@ static int lp55xx_post_init_device(struct lp55xx_chip *chip) 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 @@ void lp55xx_deinit_device(struct lp55xx_chip *chip) } 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"); |