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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Toggles a GPIO pin to power down a device
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*
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* Created using the Linux driver as reference, which
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* has been written by:
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*
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* Jamie Lentin <jm@lentin.co.uk>
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* Andrew Lunn <andrew@lunn.ch>
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*
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* Copyright (C) 2012 Jamie Lentin
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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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#include <linux/delay.h>
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struct poweroff_gpio_info {
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struct gpio_desc gpio;
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u32 active_delay_ms;
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u32 inactive_delay_ms;
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u32 timeout_ms;
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};
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static int poweroff_gpio_request(struct udevice *dev, enum sysreset_t type)
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{
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struct poweroff_gpio_info *priv = dev_get_priv(dev);
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int r;
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if (type != SYSRESET_POWER_OFF)
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return -EPROTONOSUPPORT;
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debug("GPIO poweroff\n");
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/* drive it active, also inactive->active edge */
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r = dm_gpio_set_value(&priv->gpio, 1);
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if (r < 0)
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return r;
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mdelay(priv->active_delay_ms);
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/* drive inactive, also active->inactive edge */
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r = dm_gpio_set_value(&priv->gpio, 0);
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if (r < 0)
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return r;
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mdelay(priv->inactive_delay_ms);
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/* drive it active, also inactive->active edge */
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r = dm_gpio_set_value(&priv->gpio, 1);
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if (r < 0)
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return r;
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/* give it some time */
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mdelay(priv->timeout_ms);
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return -EINPROGRESS;
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}
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static int poweroff_gpio_probe(struct udevice *dev)
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{
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struct poweroff_gpio_info *priv = dev_get_priv(dev);
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int flags;
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flags = dev_read_bool(dev, "input") ? GPIOD_IS_IN : GPIOD_IS_OUT;
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priv->active_delay_ms = dev_read_u32_default(dev, "active-delay-ms", 100);
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priv->inactive_delay_ms = dev_read_u32_default(dev, "inactive-delay-ms", 100);
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priv->timeout_ms = dev_read_u32_default(dev, "timeout-ms", 3000);
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return gpio_request_by_name(dev, "gpios", 0, &priv->gpio, flags);
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}
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static struct sysreset_ops poweroff_gpio_ops = {
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.request = poweroff_gpio_request,
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};
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static const struct udevice_id poweroff_gpio_ids[] = {
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{ .compatible = "gpio-poweroff", },
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{},
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};
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U_BOOT_DRIVER(poweroff_gpio) = {
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.name = "poweroff-gpio",
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.id = UCLASS_SYSRESET,
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.ops = &poweroff_gpio_ops,
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.probe = poweroff_gpio_probe,
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.priv_auto = sizeof(struct poweroff_gpio_info),
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.of_match = poweroff_gpio_ids,
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};
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