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regulator_fixed: Do not disable fixed regulator at probe

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If the regulator is unused it will be disabled by the regulator_shutdown sysinit.

Tested on pinebook where the backlight is controlled by a fixed-regulator.
The regulator doesn't have a regulator-boot-on param (I'm gonna upstream this) and so we disable it at probe.
We later enable it but this cause the screen to go black.
Linux doesn't disable regulator at boot (at least for fixed-regulator) so better match this to have the same UX.

MFC after:	1 month
Differential Revision:	https://reviews.freebsd.org/D17978
This commit is contained in:
Emmanuel Vadot 2018-11-26 18:46:15 +00:00
parent 72bce9fff6
commit 3cb36739ce
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=340989
1 changed files with 8 additions and 8 deletions
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16
sys/dev/extres/regulator/regulator_fixed.c
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@ -145,7 +145,6 @@ regnode_fixed_init(struct regnode *regnode)
struct regnode_fixed_sc *sc;
struct gpiobus_pin *pin;
uint32_t flags;
bool enable;
int rv;
sc = regnode_get_softc(regnode);
@ -158,14 +157,15 @@ regnode_fixed_init(struct regnode *regnode)
flags = GPIO_PIN_OUTPUT;
if (sc->gpio_open_drain)
flags |= GPIO_PIN_OPENDRAIN;
enable = sc->param->boot_on || sc->param->always_on;
if (!sc->param->enable_active_high)
enable = !enable;
rv = GPIO_PIN_SET(pin->dev, pin->pin, enable);
if (rv != 0) {
device_printf(dev, "Cannot set GPIO pin: %d\n", pin->pin);
return (rv);
if (sc->param->boot_on || sc->param->always_on) {
rv = GPIO_PIN_SET(pin->dev, pin->pin, sc->param->enable_active_high);
if (rv != 0) {
device_printf(dev, "Cannot set GPIO pin: %d\n",
pin->pin);
return (rv);
}
}
rv = GPIO_PIN_SETFLAGS(pin->dev, pin->pin, flags);
if (rv != 0) {
device_printf(dev, "Cannot configure GPIO pin: %d\n", pin->pin);