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https://github.com/u-boot/u-boot.git
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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>
127 lines
2.6 KiB
C
127 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2020 Philippe Reynes <philippe.reynes@softathome.com>
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*/
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#include <common.h>
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#include <button.h>
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#include <dm.h>
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#include <dm/lists.h>
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#include <dm/uclass-internal.h>
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#include <log.h>
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#include <asm/gpio.h>
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struct button_gpio_priv {
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struct gpio_desc gpio;
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int linux_code;
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};
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static enum button_state_t button_gpio_get_state(struct udevice *dev)
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{
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struct button_gpio_priv *priv = dev_get_priv(dev);
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int ret;
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if (!dm_gpio_is_valid(&priv->gpio))
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return -EREMOTEIO;
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ret = dm_gpio_get_value(&priv->gpio);
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if (ret < 0)
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return ret;
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return ret ? BUTTON_ON : BUTTON_OFF;
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}
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static int button_gpio_get_code(struct udevice *dev)
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{
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struct button_gpio_priv *priv = dev_get_priv(dev);
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int code = priv->linux_code;
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if (!code)
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return -ENODATA;
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return code;
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}
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static int button_gpio_probe(struct udevice *dev)
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{
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struct button_uc_plat *uc_plat = dev_get_uclass_plat(dev);
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struct button_gpio_priv *priv = dev_get_priv(dev);
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int ret;
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/* Ignore the top-level button node */
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if (!uc_plat->label)
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return 0;
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ret = gpio_request_by_name(dev, "gpios", 0, &priv->gpio, GPIOD_IS_IN);
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if (ret)
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return ret;
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ret = dev_read_u32(dev, "linux,code", &priv->linux_code);
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return ret;
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}
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static int button_gpio_remove(struct udevice *dev)
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{
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/*
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* The GPIO driver may have already been removed. We will need to
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* address this more generally.
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*/
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if (!IS_ENABLED(CONFIG_SANDBOX)) {
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struct button_gpio_priv *priv = dev_get_priv(dev);
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if (dm_gpio_is_valid(&priv->gpio))
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dm_gpio_free(dev, &priv->gpio);
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}
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return 0;
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}
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static int button_gpio_bind(struct udevice *parent)
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{
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struct udevice *dev;
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ofnode node;
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int ret;
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dev_for_each_subnode(node, parent) {
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struct button_uc_plat *uc_plat;
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const char *label;
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label = ofnode_read_string(node, "label");
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if (!label) {
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debug("%s: node %s has no label\n", __func__,
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ofnode_get_name(node));
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return -EINVAL;
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}
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ret = device_bind_driver_to_node(parent, "button_gpio",
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ofnode_get_name(node),
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node, &dev);
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if (ret)
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return ret;
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uc_plat = dev_get_uclass_plat(dev);
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uc_plat->label = label;
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}
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return 0;
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}
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static const struct button_ops button_gpio_ops = {
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.get_state = button_gpio_get_state,
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.get_code = button_gpio_get_code,
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};
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static const struct udevice_id button_gpio_ids[] = {
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{ .compatible = "gpio-keys" },
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{ .compatible = "gpio-keys-polled" },
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{ }
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};
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U_BOOT_DRIVER(button_gpio) = {
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.name = "button_gpio",
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.id = UCLASS_BUTTON,
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.of_match = button_gpio_ids,
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.ops = &button_gpio_ops,
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.priv_auto = sizeof(struct button_gpio_priv),
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.bind = button_gpio_bind,
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.probe = button_gpio_probe,
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.remove = button_gpio_remove,
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};
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