mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-04 02:20:25 +00:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
148 lines
3.5 KiB
C
148 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2015 Samsung Electronics
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*
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* Przemyslaw Marczak <p.marczak@samsung.com>
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*/
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#include <common.h>
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#include <errno.h>
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#include <dm.h>
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#include <i2c.h>
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#include <asm/gpio.h>
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#include <power/pmic.h>
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#include <power/regulator.h>
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struct fixed_regulator_platdata {
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struct gpio_desc gpio; /* GPIO for regulator enable control */
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unsigned int startup_delay_us;
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};
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static int fixed_regulator_ofdata_to_platdata(struct udevice *dev)
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{
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struct dm_regulator_uclass_platdata *uc_pdata;
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struct fixed_regulator_platdata *dev_pdata;
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struct gpio_desc *gpio;
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int flags = GPIOD_IS_OUT;
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int ret;
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dev_pdata = dev_get_platdata(dev);
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uc_pdata = dev_get_uclass_platdata(dev);
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if (!uc_pdata)
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return -ENXIO;
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/* Set type to fixed */
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uc_pdata->type = REGULATOR_TYPE_FIXED;
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if (dev_read_bool(dev, "enable-active-high"))
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flags |= GPIOD_IS_OUT_ACTIVE;
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/* Get fixed regulator optional enable GPIO desc */
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gpio = &dev_pdata->gpio;
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ret = gpio_request_by_name(dev, "gpio", 0, gpio, flags);
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if (ret) {
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debug("Fixed regulator optional enable GPIO - not found! Error: %d\n",
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ret);
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if (ret != -ENOENT)
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return ret;
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}
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/* Get optional ramp up delay */
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dev_pdata->startup_delay_us = dev_read_u32_default(dev,
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"startup-delay-us", 0);
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return 0;
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}
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static int fixed_regulator_get_value(struct udevice *dev)
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{
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struct dm_regulator_uclass_platdata *uc_pdata;
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uc_pdata = dev_get_uclass_platdata(dev);
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if (!uc_pdata)
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return -ENXIO;
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if (uc_pdata->min_uV != uc_pdata->max_uV) {
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debug("Invalid constraints for: %s\n", uc_pdata->name);
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return -EINVAL;
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}
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return uc_pdata->min_uV;
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}
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static int fixed_regulator_get_current(struct udevice *dev)
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{
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struct dm_regulator_uclass_platdata *uc_pdata;
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uc_pdata = dev_get_uclass_platdata(dev);
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if (!uc_pdata)
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return -ENXIO;
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if (uc_pdata->min_uA != uc_pdata->max_uA) {
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debug("Invalid constraints for: %s\n", uc_pdata->name);
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return -EINVAL;
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}
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return uc_pdata->min_uA;
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}
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static int fixed_regulator_get_enable(struct udevice *dev)
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{
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struct fixed_regulator_platdata *dev_pdata = dev_get_platdata(dev);
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/* Enable GPIO is optional */
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if (!dev_pdata->gpio.dev)
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return true;
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return dm_gpio_get_value(&dev_pdata->gpio);
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}
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static int fixed_regulator_set_enable(struct udevice *dev, bool enable)
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{
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struct fixed_regulator_platdata *dev_pdata = dev_get_platdata(dev);
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int ret;
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debug("%s: dev='%s', enable=%d, delay=%d, has_gpio=%d\n", __func__,
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dev->name, enable, dev_pdata->startup_delay_us,
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dm_gpio_is_valid(&dev_pdata->gpio));
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/* Enable GPIO is optional */
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if (!dm_gpio_is_valid(&dev_pdata->gpio)) {
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if (!enable)
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return -ENOSYS;
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return 0;
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}
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ret = dm_gpio_set_value(&dev_pdata->gpio, enable);
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if (ret) {
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pr_err("Can't set regulator : %s gpio to: %d\n", dev->name,
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enable);
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return ret;
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}
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if (enable && dev_pdata->startup_delay_us)
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udelay(dev_pdata->startup_delay_us);
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debug("%s: done\n", __func__);
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return 0;
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}
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static const struct dm_regulator_ops fixed_regulator_ops = {
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.get_value = fixed_regulator_get_value,
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.get_current = fixed_regulator_get_current,
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.get_enable = fixed_regulator_get_enable,
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.set_enable = fixed_regulator_set_enable,
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};
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static const struct udevice_id fixed_regulator_ids[] = {
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{ .compatible = "regulator-fixed" },
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{ },
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};
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U_BOOT_DRIVER(fixed_regulator) = {
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.name = "fixed regulator",
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.id = UCLASS_REGULATOR,
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.ops = &fixed_regulator_ops,
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.of_match = fixed_regulator_ids,
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.ofdata_to_platdata = fixed_regulator_ofdata_to_platdata,
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.platdata_auto_alloc_size = sizeof(struct fixed_regulator_platdata),
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};
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