diff options
| author | Jonas Karlman <jonas@kwiboo.se> | 2023-07-02 15:41:15 +0300 |
|---|---|---|
| committer | Kever Yang <kever.yang@rock-chips.com> | 2023-07-31 15:33:18 +0300 |
| commit | fea7a29cc8d86a0bbcb4bcf740d47924839b1f81 (patch) | |
| tree | e9512c5069dc2383d10e51e69498a7d5ff2fb316 | |
| parent | b8fc65473ae74776e7cac47c793a5ac295dea928 (diff) | |
| download | u-boot-fea7a29cc8d86a0bbcb4bcf740d47924839b1f81.tar.xz | |
power: regulator: rk8xx: Add 500us delay after LDO regulator is enabled
A quick power cycle of a LDO regulator during dw-mmc signal voltage
change has shown that SD-card does not always get recognized.
Linux driver use an enable_time of 400us for LDO regulators. Apply a
500us delay when a LDO regulator is enabled to fix possible issues.
Fixes: 94afc1cb466a ("power: regulator: rk8xx: update the driver for rk808 and rk818")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: elaine.zhang<elaine.zhang@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
| -rw-r--r-- | drivers/power/regulator/rk8xx.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/power/regulator/rk8xx.c b/drivers/power/regulator/rk8xx.c index 0ee07ad299..e95640a39b 100644 --- a/drivers/power/regulator/rk8xx.c +++ b/drivers/power/regulator/rk8xx.c @@ -12,6 +12,7 @@ #include <dm.h> #include <errno.h> #include <log.h> +#include <linux/delay.h> #include <power/rk8xx_pmic.h> #include <power/pmic.h> #include <power/regulator.h> @@ -616,6 +617,9 @@ static int _ldo_set_enable(struct udevice *pmic, int ldo, bool enable) break; } + if (enable) + udelay(500); + return ret; } |