Dear Tom

The commit e8e9715df2d4 ("regulator: fixed: Modify enable-active-high behavior") fixed the regulator driver behavior when 'enable-active-high' is defined. Unfortunately, this patch used dm_regulator_platdata()'s "boot_on" member to set GPIOD_IS_OUT_ACTIVE flag and enable the regulator.

The issue here is that regulator_common_ofdata_to_platdata() is called _before_ regulator_pre_probe() function in which the 'regulator-boot-on' property is asserted.

As a result the GPIOD_IS_OUT_ACTIVE flag is not set and gpio_request_by_name() called in the former function is not enabling the regulator. This is problematic for e.g. i.MX ethernet driver, which then tries to perform initialization without power (and fails).

The solution here is to explicitly enable regulator in regulator_pre_probe() callback only when 'regulator-boot-on' property is present in device tree. The GPIOD_IS_OUT_ACTIVE flag is not set at all, but relevant gpio is requested.

Signed-off-by: Lukasz Majewski lukma@denx.de

Tom, could you pull this fix? (I would prefer to avoid pulling my own fixes).

It has been already tested-by Patrice.

Thanks in advance.

---

drivers/power/regulator/regulator-uclass.c | 3 +++ drivers/power/regulator/regulator_common.c | 5 ----- 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/power/regulator/regulator-uclass.c b/drivers/power/regulator/regulator-uclass.c index 90961de95c..c9d26344d7 100644 --- a/drivers/power/regulator/regulator-uclass.c +++ b/drivers/power/regulator/regulator-uclass.c @@ -464,6 +464,9 @@ 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;

}

diff --git a/drivers/power/regulator/regulator_common.c b/drivers/power/regulator/regulator_common.c index 939efb2c0d..33b73b7c2f 100644 --- a/drivers/power/regulator/regulator_common.c +++ b/drivers/power/regulator/regulator_common.c @@ -12,16 +12,11 @@ int regulator_common_ofdata_to_platdata(struct udevice *dev, struct regulator_common_platdata *dev_pdata, const char *enable_gpio_name) { struct gpio_desc *gpio;

• struct dm_regulator_uclass_platdata *uc_pdata; int flags = GPIOD_IS_OUT; int ret;

• uc_pdata = dev_get_uclass_platdata(dev);

• if (!dev_read_bool(dev, "enable-active-high")) flags |= GPIOD_ACTIVE_LOW;

• if (uc_pdata->boot_on)

• flags |= GPIOD_IS_OUT_ACTIVE;
  
  

  /* Get optional enable GPIO desc */ gpio = &dev_pdata->gpio;

Best regards,

Lukasz Majewski

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