From d883a5ab2f345c2adca781901731795ab94886fb Mon Sep 17 00:00:00 2001 From: George Stark Date: Sat, 25 Nov 2023 23:05:14 +0300 Subject: leds: aw200xx: Add delay after software reset 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 Signed-off-by: Dmitry Rokosov Link: https://lore.kernel.org/r/20231125200519.1750-7-ddrokosov@salutedevices.com Signed-off-by: Lee Jones --- 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 1756b012a0b7..d4877722eb56 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); } -- cgit v1.2.3