mirror of
https://github.com/brain-hackers/u-boot-brain
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41575d8e4c
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2018 Xilinx, Inc. - Michal Simek
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <log.h>
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#include <sysreset.h>
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#include <asm/gpio.h>
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struct gpio_reboot_priv {
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struct gpio_desc gpio;
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};
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static int gpio_reboot_request(struct udevice *dev, enum sysreset_t type)
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{
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struct gpio_reboot_priv *priv = dev_get_priv(dev);
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/*
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* When debug log is enabled please make sure that chars won't end up
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* in output fifo. Or you can append udelay(); to get enough time
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* to HW to emit output fifo.
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*/
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debug("GPIO reset\n");
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/* Writing 1 respects polarity (active high/low) based on gpio->flags */
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return dm_gpio_set_value(&priv->gpio, 1);
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}
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static struct sysreset_ops gpio_reboot_ops = {
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.request = gpio_reboot_request,
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};
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int gpio_reboot_probe(struct udevice *dev)
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{
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struct gpio_reboot_priv *priv = dev_get_priv(dev);
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/*
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* Linux kernel DT binding contain others optional properties
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* which are not supported now
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*/
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return gpio_request_by_name(dev, "gpios", 0, &priv->gpio, GPIOD_IS_OUT);
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}
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static const struct udevice_id led_gpio_ids[] = {
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{ .compatible = "gpio-restart" },
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{ }
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};
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U_BOOT_DRIVER(gpio_reboot) = {
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.id = UCLASS_SYSRESET,
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.name = "gpio_restart",
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.of_match = led_gpio_ids,
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.ops = &gpio_reboot_ops,
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.priv_auto = sizeof(struct gpio_reboot_priv),
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.probe = gpio_reboot_probe,
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};
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