blob: 621930009707de1ceca28183c5d1e21f11f0d7a8 [file] [log] [blame]
Simon Glasscd9c2072016-01-21 19:44:59 -07001/*
2 * Copyright (c) 2016 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8#include <common.h>
9#include <backlight.h>
10#include <dm.h>
11#include <panel.h>
12#include <asm/gpio.h>
13#include <power/regulator.h>
14
15DECLARE_GLOBAL_DATA_PTR;
16
17struct simple_panel_priv {
18 struct udevice *reg;
19 struct udevice *backlight;
20 struct gpio_desc enable;
21};
22
23static int simple_panel_enable_backlight(struct udevice *dev)
24{
25 struct simple_panel_priv *priv = dev_get_priv(dev);
26 int ret;
27
28 dm_gpio_set_value(&priv->enable, 1);
29 ret = backlight_enable(priv->backlight);
30 if (ret)
31 return ret;
32
33 return 0;
34}
35
36static int simple_panel_ofdata_to_platdata(struct udevice *dev)
37{
38 struct simple_panel_priv *priv = dev_get_priv(dev);
39 int ret;
40
Simon Glasse23c6c22016-03-06 19:27:48 -070041 if (IS_ENABLED(CONFIG_DM_REGULATOR)) {
42 ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
43 "power-supply", &priv->reg);
44 if (ret) {
45 debug("%s: Warning: cnnot get power supply: ret=%d\n",
46 __func__, ret);
47 if (ret != -ENOENT)
48 return ret;
49 }
Simon Glasscd9c2072016-01-21 19:44:59 -070050 }
51 ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev,
52 "backlight", &priv->backlight);
53 if (ret) {
54 debug("%s: Cannot get backlight: ret=%d\n", __func__, ret);
55 return ret;
56 }
57 ret = gpio_request_by_name(dev, "enable-gpios", 0, &priv->enable,
58 GPIOD_IS_OUT);
59 if (ret) {
60 debug("%s: Warning: cannot get enable GPIO: ret=%d\n",
61 __func__, ret);
62 if (ret != -ENOENT)
63 return ret;
64 }
65
66 return 0;
67}
68
69static int simple_panel_probe(struct udevice *dev)
70{
71 struct simple_panel_priv *priv = dev_get_priv(dev);
72 int ret;
73
Simon Glasse23c6c22016-03-06 19:27:48 -070074 if (IS_ENABLED(CONFIG_DM_REGULATOR) && priv->reg) {
Simon Glasscd9c2072016-01-21 19:44:59 -070075 debug("%s: Enable regulator '%s'\n", __func__, priv->reg->name);
76 ret = regulator_set_enable(priv->reg, true);
77 if (ret)
78 return ret;
79 }
80
81 return 0;
82}
83
84static const struct panel_ops simple_panel_ops = {
85 .enable_backlight = simple_panel_enable_backlight,
86};
87
88static const struct udevice_id simple_panel_ids[] = {
89 { .compatible = "simple-panel" },
Simon Glassd7659212016-01-30 16:37:50 -070090 { .compatible = "auo,b133xtn01" },
Simon Glasscd9c2072016-01-21 19:44:59 -070091 { }
92};
93
94U_BOOT_DRIVER(simple_panel) = {
95 .name = "simple_panel",
96 .id = UCLASS_PANEL,
97 .of_match = simple_panel_ids,
98 .ops = &simple_panel_ops,
99 .ofdata_to_platdata = simple_panel_ofdata_to_platdata,
100 .probe = simple_panel_probe,
101 .priv_auto_alloc_size = sizeof(struct simple_panel_priv),
102};