From: George Stark <gnstark@xxxxxxxxxxxxxxxxx> According to datasheets of aw200xx devices software reset takes at least 1ms so add delay after reset before issuing commands to device. Signed-off-by: George Stark <gnstark@xxxxxxxxxxxxxxxxx> Signed-off-by: Dmitry Rokosov <ddrokosov@xxxxxxxxxxxxxxxxx> Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx> --- 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 4bce5e7381c0..bb17e48b3e2a 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 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
