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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>
73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017, STMicroelectronics - All Rights Reserved
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* Author: Patrick Delaunay <patrick.delaunay@st.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <backlight.h>
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#include <log.h>
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#include <asm/gpio.h>
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struct gpio_backlight_priv {
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struct gpio_desc gpio;
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bool def_value;
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};
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static int gpio_backlight_enable(struct udevice *dev)
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{
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struct gpio_backlight_priv *priv = dev_get_priv(dev);
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dm_gpio_set_value(&priv->gpio, 1);
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return 0;
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}
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static int gpio_backlight_ofdata_to_platdata(struct udevice *dev)
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{
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struct gpio_backlight_priv *priv = dev_get_priv(dev);
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int ret;
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ret = gpio_request_by_name(dev, "gpios", 0, &priv->gpio,
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GPIOD_IS_OUT);
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if (ret) {
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debug("%s: Warning: cannot get GPIO: ret=%d\n",
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__func__, ret);
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return ret;
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}
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priv->def_value = dev_read_bool(dev, "default-on");
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return 0;
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}
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static int gpio_backlight_probe(struct udevice *dev)
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{
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struct gpio_backlight_priv *priv = dev_get_priv(dev);
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if (priv->def_value)
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gpio_backlight_enable(dev);
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return 0;
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}
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static const struct backlight_ops gpio_backlight_ops = {
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.enable = gpio_backlight_enable,
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};
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static const struct udevice_id gpio_backlight_ids[] = {
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{ .compatible = "gpio-backlight" },
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{ }
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};
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U_BOOT_DRIVER(gpio_backlight) = {
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.name = "gpio_backlight",
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.id = UCLASS_PANEL_BACKLIGHT,
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.of_match = gpio_backlight_ids,
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.ops = &gpio_backlight_ops,
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.ofdata_to_platdata = gpio_backlight_ofdata_to_platdata,
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.probe = gpio_backlight_probe,
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.priv_auto = sizeof(struct gpio_backlight_priv),
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};
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