/* * Copyright (c) 2016 Google, Inc * Written by Simon Glass <sjg@chromium.org> * * SPDX-License-Identifier: GPL-2.0+ */ #include <common.h> #include <backlight.h> #include <dm.h> #include <panel.h> #include <asm/gpio.h> #include <power/regulator.h> DECLARE_GLOBAL_DATA_PTR; struct simple_panel_priv { struct udevice *reg; struct udevice *backlight; struct gpio_desc enable; }; static int simple_panel_enable_backlight(struct udevice *dev) { struct simple_panel_priv *priv = dev_get_priv(dev); int ret; dm_gpio_set_value(&priv->enable, 1); ret = backlight_enable(priv->backlight); if (ret) return ret; return 0; } static int simple_panel_ofdata_to_platdata(struct udevice *dev) { struct simple_panel_priv *priv = dev_get_priv(dev); int ret; if (IS_ENABLED(CONFIG_DM_REGULATOR)) { ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev, "power-supply", &priv->reg); if (ret) { debug("%s: Warning: cnnot get power supply: ret=%d\n", __func__, ret); if (ret != -ENOENT) return ret; } } ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev, "backlight", &priv->backlight); if (ret) { debug("%s: Cannot get backlight: ret=%d\n", __func__, ret); return ret; } ret = gpio_request_by_name(dev, "enable-gpios", 0, &priv->enable, GPIOD_IS_OUT); if (ret) { debug("%s: Warning: cannot get enable GPIO: ret=%d\n", __func__, ret); if (ret != -ENOENT) return ret; } return 0; } static int simple_panel_probe(struct udevice *dev) { struct simple_panel_priv *priv = dev_get_priv(dev); int ret; if (IS_ENABLED(CONFIG_DM_REGULATOR) && priv->reg) { debug("%s: Enable regulator '%s'\n", __func__, priv->reg->name); ret = regulator_set_enable(priv->reg, true); if (ret) return ret; } return 0; } static const struct panel_ops simple_panel_ops = { .enable_backlight = simple_panel_enable_backlight, }; static const struct udevice_id simple_panel_ids[] = { { .compatible = "simple-panel" }, { .compatible = "auo,b133xtn01" }, { } }; U_BOOT_DRIVER(simple_panel) = { .name = "simple_panel", .id = UCLASS_PANEL, .of_match = simple_panel_ids, .ops = &simple_panel_ops, .ofdata_to_platdata = simple_panel_ofdata_to_platdata, .probe = simple_panel_probe, .priv_auto_alloc_size = sizeof(struct simple_panel_priv), };