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If either "regulator-boot-on" or "regulator-always-on" properties are true,

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explicitly enable the regulator at attach time. In addition, if the
"startup-delay-us" property is present, delay after enabling the regulator.
This commit is contained in:
jmcneill 2016-06-15 13:13:40 +00:00
parent 4df2af8f4b
commit 75e20526bb
1 changed files with 22 additions and 13 deletions
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35
sys/dev/fdt/fixedregulator.c
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@ -1,4 +1,4 @@
/* $NetBSD: fixedregulator.c,v 1.3 2015/12/22 22:19:07 jmcneill Exp $ */
/* $NetBSD: fixedregulator.c,v 1.4 2016/06/15 13:13:40 jmcneill Exp $ */
/*-
* Copyright (c) 2015 Jared D. McNeill <jmcneill@invisible.ca>
@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: fixedregulator.c,v 1.3 2015/12/22 22:19:07 jmcneill Exp $");
__KERNEL_RCSID(0, "$NetBSD: fixedregulator.c,v 1.4 2016/06/15 13:13:40 jmcneill Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -57,7 +57,9 @@ struct fixedregulator_softc {
struct fdtbus_gpio_pin *sc_pin;
bool sc_always_on;
bool sc_boot_on;
bool sc_enable_val;
uint32_t sc_delay;
};
CFATTACH_DECL_NEW(fregulator, sizeof(struct fixedregulator_softc),
@ -104,13 +106,24 @@ fixedregulator_attach(device_t parent, device_t self, void *aux)
gpioflags |= GPIO_PIN_OPENDRAIN;
sc->sc_always_on = of_getprop_bool(phandle, "regulator-always-on");
sc->sc_boot_on = of_getprop_bool(phandle, "regulator-boot-on");
sc->sc_enable_val = of_getprop_bool(phandle, "enable-active-high");
if (of_getprop_uint32(phandle, "startup-delay-us", &sc->sc_delay) != 0)
sc->sc_delay = 0;
sc->sc_pin = fdtbus_gpio_acquire(phandle, "gpio", gpioflags);
if (sc->sc_pin == NULL)
sc->sc_always_on = true;
sc->sc_enable_val = of_getprop_bool(phandle, "enable-active-high");
fdtbus_register_regulator_controller(self, phandle,
&fixedregulator_funcs);
/*
* If the regulator is flagged as always on or enabled at boot,
* ensure that it is enabled
*/
if (sc->sc_always_on || sc->sc_boot_on)
fixedregulator_enable(self, true);
}
static int
@ -130,18 +143,14 @@ fixedregulator_enable(device_t dev, bool enable)
struct fixedregulator_softc * const sc = device_private(dev);
if (enable) {
if (sc->sc_always_on) {
return 0;
} else {
if (sc->sc_pin != NULL)
fdtbus_gpio_write_raw(sc->sc_pin, sc->sc_enable_val);
return 0;
}
if (sc->sc_delay > 0)
delay(sc->sc_delay);
} else {
if (sc->sc_always_on) {
if (sc->sc_always_on)
return EIO;
} else {
fdtbus_gpio_write_raw(sc->sc_pin, !sc->sc_enable_val);
return 0;
}
fdtbus_gpio_write_raw(sc->sc_pin, !sc->sc_enable_val);
}
return 0;
}