[U-Boot] [PATCH v2 7/9] power: regulator: s2mps11: Add enable delay

Krzysztof Kozlowski
2019-02-13T16:46:46Z

According to datasheet, the output on LDO regulators will start
appearing after 10-15 us.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
drivers/power/regulator/s2mps11_regulator.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/power/regulator/s2mps11_regulator.c b/drivers/power/regulator/s2mps11_regulator.c
index 723d27f67c9a..1f1581852ee2 100644
--- a/drivers/power/regulator/s2mps11_regulator.c
+++ b/drivers/power/regulator/s2mps11_regulator.c
@@ -551,7 +551,14 @@ static int ldo_get_enable(struct udevice *dev)

static int ldo_set_enable(struct udevice *dev, bool enable)
{
- return s2mps11_ldo_enable(dev, PMIC_OP_SET, &enable);
+ int ret;
+
+ ret = s2mps11_ldo_enable(dev, PMIC_OP_SET, &enable);
+
+ /* Wait the "enable delay" for voltage to start to rise */
+ udelay(15);
+
+ return ret;
}

static int ldo_get_mode(struct udevice *dev)
--
2.17.1