diff options
| author | jmcneill <jmcneill@NetBSD.org> | 2016-06-15 13:13:40 +0000 |
|---|---|---|
| committer | jmcneill <jmcneill@NetBSD.org> | 2016-06-15 13:13:40 +0000 |
| commit | a9abd0ccbe4af3aba53ba8a1271d2a634bb65cae (patch) | |
| tree | 0e43740ddf1f7edca306df3004c1d4ee7f13c617 /sys/dev | |
| parent | 0faafe2604e184e8b091a7cf5c9087acbe187cc5 (diff) | |
If either "regulator-boot-on" or "regulator-always-on" properties are true,
explicitly enable the regulator at attach time. In addition, if the
"startup-delay-us" property is present, delay after enabling the regulator.
Diffstat (limited to 'sys/dev')
| -rw-r--r-- | sys/dev/fdt/fixedregulator.c | 35 |
1 files changed, 22 insertions, 13 deletions
diff --git a/sys/dev/fdt/fixedregulator.c b/sys/dev/fdt/fixedregulator.c index 5df08b0130f..d5f4b00f990 100644 --- a/sys/dev/fdt/fixedregulator.c +++ b/sys/dev/fdt/fixedregulator.c @@ -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; } |
