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regulator: fix: enable gpio when requested

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The fix in commit b7adcdd073 has the side-effect that the regulator
will be disabled when requesting the relevant gpio in
regulator_common_ofdata_to_platdata() and enabled in
regulator_pre_probe() when the regulator was already enabled.
This leads to a short interruption in the 3.3V power to the PCIe
slot on the firefly-rk3399 which makes an ADATA SX8000NP NVMe SSD
unhappy.

Fix this by setting the GPIOD_IS_OUT_ACTIVE flag again when the
'regulator-boot-on' property is set, but check for this property
explicitly instead of relying on the "boot_on" member of
the uclass platdata.

Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
Tested-by: Patrice Chotard <patrice.chotard@st.com>
This commit is contained in:
Mark Kettenis 2020-04-27 11:09:47 +02:00 • committed by Tom Rini
parent 287be3294a
commit e88d6979d1
2 changed files with 2 additions and 3 deletions
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3
drivers/power/regulator/regulator-uclass.c
View file

@ -466,9 +466,6 @@ static int regulator_pre_probe(struct udevice *dev)
(uc_pdata->min_uA == uc_pdata->max_uA))
uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA;
if (uc_pdata->boot_on)
regulator_set_enable(dev, uc_pdata->boot_on);
return 0;
}

2
drivers/power/regulator/regulator_common.c
View file

@ -19,6 +19,8 @@ int regulator_common_ofdata_to_platdata(struct udevice *dev,
if (!dev_read_bool(dev, "enable-active-high"))
flags |= GPIOD_ACTIVE_LOW;
if (dev_read_bool(dev, "regulator-boot-on"))
flags |= GPIOD_IS_OUT_ACTIVE;
/* Get optional enable GPIO desc */
gpio = &dev_pdata->gpio;