projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 5b6a6a91 PD |
2 | /* |
| 3 | * Copyright (C) 2017, STMicroelectronics - All Rights Reserved | |
| 0f8106f8 | 4 | * Author: Patrick Delaunay <patrick.delaunay@foss.st.com> |
| 5b6a6a91 PD |
5 | */ |
| 6 | ||
| 7 | #include <common.h> | |
| 8 | #include <dm.h> | |
| 9 | #include <backlight.h> | |
| f7ae49fc | 10 | #include <log.h> |
| 5b6a6a91 PD |
11 | #include <asm/gpio.h> |
| 12 | ||
| 5b6a6a91 PD |
13 | struct gpio_backlight_priv { |
| 14 | struct gpio_desc gpio; | |
| 15 | bool def_value; | |
| 16 | }; | |
| 17 | ||
| 18 | static int gpio_backlight_enable(struct udevice *dev) | |
| 19 | { | |
| 20 | struct gpio_backlight_priv *priv = dev_get_priv(dev); | |
| 21 | ||
| 22 | dm_gpio_set_value(&priv->gpio, 1); | |
| 23 | ||
| 24 | return 0; | |
| 25 | } | |
| 26 | ||
| d1998a9f | 27 | static int gpio_backlight_of_to_plat(struct udevice *dev) |
| 5b6a6a91 PD |
28 | { |
| 29 | struct gpio_backlight_priv *priv = dev_get_priv(dev); | |
| 30 | int ret; | |
| 31 | ||
| 32 | ret = gpio_request_by_name(dev, "gpios", 0, &priv->gpio, | |
| 33 | GPIOD_IS_OUT); | |
| 34 | if (ret) { | |
| 35 | debug("%s: Warning: cannot get GPIO: ret=%d\n", | |
| 36 | __func__, ret); | |
| 37 | return ret; | |
| 38 | } | |
| 39 | ||
| 40 | priv->def_value = dev_read_bool(dev, "default-on"); | |
| 41 | ||
| 42 | return 0; | |
| 43 | } | |
| 44 | ||
| 45 | static int gpio_backlight_probe(struct udevice *dev) | |
| 46 | { | |
| 47 | struct gpio_backlight_priv *priv = dev_get_priv(dev); | |
| 48 | ||
| 49 | if (priv->def_value) | |
| 50 | gpio_backlight_enable(dev); | |
| 51 | ||
| 52 | return 0; | |
| 53 | } | |
| 54 | ||
| 55 | static const struct backlight_ops gpio_backlight_ops = { | |
| 56 | .enable = gpio_backlight_enable, | |
| 57 | }; | |
| 58 | ||
| 59 | static const struct udevice_id gpio_backlight_ids[] = { | |
| 60 | { .compatible = "gpio-backlight" }, | |
| 61 | { } | |
| 62 | }; | |
| 63 | ||
| 64 | U_BOOT_DRIVER(gpio_backlight) = { | |
| 65 | .name = "gpio_backlight", | |
| 66 | .id = UCLASS_PANEL_BACKLIGHT, | |
| 67 | .of_match = gpio_backlight_ids, | |
| 68 | .ops = &gpio_backlight_ops, | |
| d1998a9f | 69 | .of_to_plat = gpio_backlight_of_to_plat, |
| 5b6a6a91 | 70 | .probe = gpio_backlight_probe, |
| 41575d8e | 71 | .priv_auto = sizeof(struct gpio_backlight_priv), |
| 5b6a6a91 | 72 | }; |