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| author | Milo Kim <milo.kim@ti.com> | 2013-11-20 22:13:34 -0800 |
|---|---|---|
| committer | Bryan Wu <cooloney@gmail.com> | 2014-01-27 17:28:48 -0800 |
| commit | 28c9266b38a00a07497daad0237f7fa154652ece (patch) | |
| tree | 211c339c861923ea835a3644eef88aa5f5633e50 /drivers/leds/leds-lp5521.c | |
| parent | 1f431afdb4572c4f1dc8a3c5159fe910c53fc814 (diff) | |
| download | linux-28c9266b38a00a07497daad0237f7fa154652ece.tar.gz linux-28c9266b38a00a07497daad0237f7fa154652ece.tar.bz2 linux-28c9266b38a00a07497daad0237f7fa154652ece.zip | |
leds: lp5521/5523: Fix multiple engine usage bug
Whenever the engine is loaded by the user-application, the operation mode is
reset first. But it has a problem in case of multiple engine used because
previous engine settings are cleared.
The driver should update not whole 8bits but each engine bit by masking.
On the other hands, whole engines should be reset when the driver is unloaded
and on initializing the LP5523 driver.
So, new functions are used for this handling - lp5521/5523_stop_all_engines().
Cc: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Milo Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Diffstat (limited to 'drivers/leds/leds-lp5521.c')
| -rw-r--r-- | drivers/leds/leds-lp5521.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c index 05188351711d..26f89ac15998 100644 --- a/drivers/leds/leds-lp5521.c +++ b/drivers/leds/leds-lp5521.c @@ -152,12 +152,26 @@ static void lp5521_load_engine(struct lp55xx_chip *chip) lp5521_wait_opmode_done(); } -static void lp5521_stop_engine(struct lp55xx_chip *chip) +static void lp5521_stop_all_engines(struct lp55xx_chip *chip) { lp55xx_write(chip, LP5521_REG_OP_MODE, 0); lp5521_wait_opmode_done(); } +static void lp5521_stop_engine(struct lp55xx_chip *chip) +{ + enum lp55xx_engine_index idx = chip->engine_idx; + u8 mask[] = { + [LP55XX_ENGINE_1] = LP5521_MODE_R_M, + [LP55XX_ENGINE_2] = LP5521_MODE_G_M, + [LP55XX_ENGINE_3] = LP5521_MODE_B_M, + }; + + lp55xx_update_bits(chip, LP5521_REG_OP_MODE, mask[idx], 0); + + lp5521_wait_opmode_done(); +} + static void lp5521_run_engine(struct lp55xx_chip *chip, bool start) { int ret; @@ -568,7 +582,7 @@ static int lp5521_remove(struct i2c_client *client) struct lp55xx_led *led = i2c_get_clientdata(client); struct lp55xx_chip *chip = led->chip; - lp5521_stop_engine(chip); + lp5521_stop_all_engines(chip); lp55xx_unregister_sysfs(chip); lp55xx_unregister_leds(led, chip); lp55xx_deinit_device(chip); |