mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-21 10:43:06 +00:00
8a8d24bdf1
Try to maintain some consistency between these variables by using _plat as a suffix for them. Signed-off-by: Simon Glass <sjg@chromium.org>
91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2019 Disruptive Technologies Research AS
|
|
* Sven Schwermer <sven.svenschwermer@disruptive-technologies.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <log.h>
|
|
#include <linux/delay.h>
|
|
#include <power/regulator.h>
|
|
|
|
#include "regulator_common.h"
|
|
|
|
int regulator_common_of_to_plat(struct udevice *dev,
|
|
struct regulator_common_plat *dev_pdata,
|
|
const char *enable_gpio_name)
|
|
{
|
|
struct gpio_desc *gpio;
|
|
int flags = GPIOD_IS_OUT;
|
|
int ret;
|
|
|
|
if (!dev_read_bool(dev, "enable-active-high"))
|
|
flags |= GPIOD_ACTIVE_LOW;
|
|
if (dev_read_bool(dev, "regulator-boot-on"))
|
|
flags |= GPIOD_IS_OUT_ACTIVE;
|
|
|
|
/* Get optional enable GPIO desc */
|
|
gpio = &dev_pdata->gpio;
|
|
ret = gpio_request_by_name(dev, enable_gpio_name, 0, gpio, flags);
|
|
if (ret) {
|
|
debug("Regulator '%s' optional enable GPIO - not found! Error: %d\n",
|
|
dev->name, ret);
|
|
if (ret != -ENOENT)
|
|
return ret;
|
|
}
|
|
|
|
/* Get optional ramp up delay */
|
|
dev_pdata->startup_delay_us = dev_read_u32_default(dev,
|
|
"startup-delay-us", 0);
|
|
dev_pdata->off_on_delay_us =
|
|
dev_read_u32_default(dev, "off-on-delay-us", 0);
|
|
if (!dev_pdata->off_on_delay_us) {
|
|
dev_pdata->off_on_delay_us =
|
|
dev_read_u32_default(dev, "u-boot,off-on-delay-us", 0);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int regulator_common_get_enable(const struct udevice *dev,
|
|
struct regulator_common_plat *dev_pdata)
|
|
{
|
|
/* Enable GPIO is optional */
|
|
if (!dev_pdata->gpio.dev)
|
|
return true;
|
|
|
|
return dm_gpio_get_value(&dev_pdata->gpio);
|
|
}
|
|
|
|
int regulator_common_set_enable(const struct udevice *dev,
|
|
struct regulator_common_plat *dev_pdata, bool enable)
|
|
{
|
|
int ret;
|
|
|
|
debug("%s: dev='%s', enable=%d, delay=%d, has_gpio=%d\n", __func__,
|
|
dev->name, enable, dev_pdata->startup_delay_us,
|
|
dm_gpio_is_valid(&dev_pdata->gpio));
|
|
/* Enable GPIO is optional */
|
|
if (!dm_gpio_is_valid(&dev_pdata->gpio)) {
|
|
if (!enable)
|
|
return -ENOSYS;
|
|
return 0;
|
|
}
|
|
|
|
ret = dm_gpio_set_value(&dev_pdata->gpio, enable);
|
|
if (ret) {
|
|
pr_err("Can't set regulator : %s gpio to: %d\n", dev->name,
|
|
enable);
|
|
return ret;
|
|
}
|
|
|
|
if (enable && dev_pdata->startup_delay_us)
|
|
udelay(dev_pdata->startup_delay_us);
|
|
debug("%s: done\n", __func__);
|
|
|
|
if (!enable && dev_pdata->off_on_delay_us)
|
|
udelay(dev_pdata->off_on_delay_us);
|
|
|
|
return 0;
|
|
}
|