From: George Stark <gnstark@xxxxxxxxxxxxxxxxx> According to the datasheets of AW200xx devices, the software reset takes at least 1ms. Therefore, it is required to add a delay after the reset before issuing commands to the device. Signed-off-by: George Stark <gnstark@xxxxxxxxxxxxxxxxx> Signed-off-by: Dmitry Rokosov <ddrokosov@xxxxxxxxxxxxxxxxx> --- drivers/leds/leds-aw200xx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/leds/leds-aw200xx.c b/drivers/leds/leds-aw200xx.c index 91ba580edf87..12c4251211dd 100644 --- a/drivers/leds/leds-aw200xx.c +++ b/drivers/leds/leds-aw200xx.c @@ -321,6 +321,9 @@ static int aw200xx_chip_reset(const struct aw200xx *const chip) if (ret) return ret; + /* According to the datasheet software reset takes at least 1ms */ + fsleep(1000); + regcache_mark_dirty(chip->regmap); return regmap_write(chip->regmap, AW200XX_REG_FCD, AW200XX_FCD_CLEAR); } -- 2.36.0
