[U-Boot] [RFT 6/8] power: regulator: s2mps11: Add enable delay
Lukasz Majewski
lukma at denx.de
Mon Feb 11 07:11:41 UTC 2019
Hi Krzysztof,
> According to datasheet, the output on LDO regulators will start
> appearing after 10-15 us.
>
> Signed-off-by: Krzysztof Kozlowski <krzk at 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);
I assume, that this value is the same as in the Linux driver?
> +
> + return ret;
> }
>
> static int ldo_get_mode(struct udevice *dev)
Best regards,
Lukasz Majewski
--
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