caa4daa2ae
We use 'priv' for private data but often use 'platdata' for platform data. We can't really use 'pdata' since that is ambiguous (it could mean private or platform data). Rename some of the latter variables to end with 'plat' for consistency. Signed-off-by: Simon Glass <sjg@chromium.org>
113 lines
2.3 KiB
C
113 lines
2.3 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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};
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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_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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return 0;
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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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};
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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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