mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-05 18:56:15 +09:00
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>
137 lines
3.2 KiB
C
137 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
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* Keerthy <j-keerthy@ti.com>
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*/
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#include <common.h>
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#include <fdtdec.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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#define GPIO_REGULATOR_MAX_STATES 2
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DECLARE_GLOBAL_DATA_PTR;
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struct gpio_regulator_platdata {
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struct gpio_desc gpio; /* GPIO for regulator voltage control */
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int states[GPIO_REGULATOR_MAX_STATES];
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int voltages[GPIO_REGULATOR_MAX_STATES];
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};
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static int gpio_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 gpio_regulator_platdata *dev_pdata;
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struct gpio_desc *gpio;
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const void *blob = gd->fdt_blob;
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int node = dev_of_offset(dev);
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int ret, count, i, j;
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u32 states_array[8];
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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 gpio */
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uc_pdata->type = REGULATOR_TYPE_GPIO;
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/*
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* Get gpio regulator gpio desc
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* Assuming one GPIO per regulator.
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* Can be extended later to multiple GPIOs
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* per gpio-regulator. As of now no instance with multiple
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* gpios is presnt
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*/
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gpio = &dev_pdata->gpio;
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ret = gpio_request_by_name(dev, "gpios", 0, gpio, GPIOD_IS_OUT);
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if (ret)
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debug("regulator gpio - not found! Error: %d", ret);
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count = fdtdec_get_int_array_count(blob, node, "states",
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states_array, 8);
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if (!count)
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return -EINVAL;
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for (i = 0, j = 0; i < count; i += 2) {
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dev_pdata->voltages[j] = states_array[i];
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dev_pdata->states[j] = states_array[i + 1];
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j++;
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}
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return 0;
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}
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static int gpio_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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struct gpio_regulator_platdata *dev_pdata = dev_get_platdata(dev);
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int enable;
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if (!dev_pdata->gpio.dev)
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return -ENOSYS;
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uc_pdata = dev_get_uclass_platdata(dev);
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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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enable = dm_gpio_get_value(&dev_pdata->gpio);
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if (enable == dev_pdata->states[0])
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return dev_pdata->voltages[0];
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else
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return dev_pdata->voltages[1];
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}
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static int gpio_regulator_set_value(struct udevice *dev, int uV)
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{
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struct gpio_regulator_platdata *dev_pdata = dev_get_platdata(dev);
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int ret;
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bool enable;
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if (!dev_pdata->gpio.dev)
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return -ENOSYS;
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if (uV == dev_pdata->voltages[0])
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enable = dev_pdata->states[0];
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else if (uV == dev_pdata->voltages[1])
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enable = dev_pdata->states[1];
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else
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return -EINVAL;
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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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return 0;
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}
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static const struct dm_regulator_ops gpio_regulator_ops = {
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.get_value = gpio_regulator_get_value,
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.set_value = gpio_regulator_set_value,
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};
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static const struct udevice_id gpio_regulator_ids[] = {
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{ .compatible = "regulator-gpio" },
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{ },
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};
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U_BOOT_DRIVER(gpio_regulator) = {
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.name = "gpio regulator",
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.id = UCLASS_REGULATOR,
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.ops = &gpio_regulator_ops,
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.of_match = gpio_regulator_ids,
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.ofdata_to_platdata = gpio_regulator_ofdata_to_platdata,
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.platdata_auto_alloc_size = sizeof(struct gpio_regulator_platdata),
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};
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