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/* $OpenBSD: ofw_regulator.c,v 1.1 2016/08/13 10:52:21 kettenis Exp $ */
/*
* Copyright (c) 2016 Mark Kettenis
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_gpio.h>
#include <dev/ofw/ofw_pinctrl.h>
#include <dev/ofw/ofw_regulator.h>
int
regulator_set(uint32_t phandle, int enable)
{
uint32_t *gpio;
uint32_t startup_delay;
int active;
int node;
int len;
node = OF_getnodebyphandle(phandle);
if (node == 0)
return -1;
if (!OF_is_compatible(node, "regulator-fixed"))
return -1;
pinctrl_byname(node, "default");
if (OF_getproplen(node, "enable-active-high") == 0)
active = 1;
else
active = 0;
/* The "gpio" property is optional. */
len = OF_getproplen(node, "gpio");
if (len < 0)
return 0;
gpio = malloc(len, M_TEMP, M_WAITOK);
OF_getpropintarray(node, "gpio", gpio, len);
gpio_controller_config_pin(gpio, GPIO_CONFIG_OUTPUT);
if (enable)
gpio_controller_set_pin(gpio, active);
else
gpio_controller_set_pin(gpio, !active);
free(gpio, M_TEMP, len);
startup_delay = OF_getpropint(node, "startup-delay-us", 0);
if (enable && startup_delay > 0)
delay(startup_delay);
return 0;
}
int
regulator_enable(uint32_t phandle)
{
return regulator_set(phandle, 1);
}
int
regulator_disable(uint32_t phandle)
{
return regulator_set(phandle, 0);
}
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