diff options
| author | Jonas Karlman <[email protected]> | 2023-07-02 12:41:15 +0000 |
|---|---|---|
| committer | Kever Yang <[email protected]> | 2023-07-31 20:33:18 +0800 |
| commit | fea7a29cc8d86a0bbcb4bcf740d47924839b1f81 (patch) | |
| tree | e9512c5069dc2383d10e51e69498a7d5ff2fb316 /drivers | |
| parent | b8fc65473ae74776e7cac47c793a5ac295dea928 (diff) | |
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 <[email protected]>
Reviewed-by: elaine.zhang<[email protected]>
Reviewed-by: Kever Yang <[email protected]>
Diffstat (limited to 'drivers')
| -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 0ee07ad299d..e95640a39b0 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; } |