blob: 7a968e740c5653b7fb08f1dcb5410bca38963373 [file] [log] [blame]
Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Simon Glasscd9c2072016-01-21 19:44:59 -07002/*
3 * Copyright (c) 2016 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
Simon Glasscd9c2072016-01-21 19:44:59 -07005 */
6
7#include <common.h>
8#include <backlight.h>
9#include <dm.h>
10#include <panel.h>
11#include <asm/gpio.h>
12#include <power/regulator.h>
13
Simon Glasscd9c2072016-01-21 19:44:59 -070014struct simple_panel_priv {
15 struct udevice *reg;
16 struct udevice *backlight;
17 struct gpio_desc enable;
18};
19
20static int simple_panel_enable_backlight(struct udevice *dev)
21{
22 struct simple_panel_priv *priv = dev_get_priv(dev);
23 int ret;
24
Simon Glass1a9f3da2017-06-12 06:21:38 -060025 debug("%s: start, backlight = '%s'\n", __func__, priv->backlight->name);
Simon Glasscd9c2072016-01-21 19:44:59 -070026 dm_gpio_set_value(&priv->enable, 1);
27 ret = backlight_enable(priv->backlight);
Simon Glass1a9f3da2017-06-12 06:21:38 -060028 debug("%s: done, ret = %d\n", __func__, ret);
Simon Glasscd9c2072016-01-21 19:44:59 -070029 if (ret)
30 return ret;
31
32 return 0;
33}
34
Simon Glassa4f737a2018-10-01 12:22:41 -060035static int simple_panel_set_backlight(struct udevice *dev, int percent)
36{
37 struct simple_panel_priv *priv = dev_get_priv(dev);
38 int ret;
39
40 debug("%s: start, backlight = '%s'\n", __func__, priv->backlight->name);
41 dm_gpio_set_value(&priv->enable, 1);
42 ret = backlight_set_brightness(priv->backlight, percent);
43 debug("%s: done, ret = %d\n", __func__, ret);
44 if (ret)
45 return ret;
46
47 return 0;
48}
49
Simon Glasscd9c2072016-01-21 19:44:59 -070050static int simple_panel_ofdata_to_platdata(struct udevice *dev)
51{
52 struct simple_panel_priv *priv = dev_get_priv(dev);
53 int ret;
54
Simon Glasse23c6c22016-03-06 19:27:48 -070055 if (IS_ENABLED(CONFIG_DM_REGULATOR)) {
56 ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
57 "power-supply", &priv->reg);
58 if (ret) {
Marcel Ziswiler28c694c2016-09-28 11:24:06 +020059 debug("%s: Warning: cannot get power supply: ret=%d\n",
Simon Glasse23c6c22016-03-06 19:27:48 -070060 __func__, ret);
61 if (ret != -ENOENT)
62 return ret;
63 }
Simon Glasscd9c2072016-01-21 19:44:59 -070064 }
65 ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev,
66 "backlight", &priv->backlight);
67 if (ret) {
68 debug("%s: Cannot get backlight: ret=%d\n", __func__, ret);
Simon Glassa4f737a2018-10-01 12:22:41 -060069 return log_ret(ret);
Simon Glasscd9c2072016-01-21 19:44:59 -070070 }
71 ret = gpio_request_by_name(dev, "enable-gpios", 0, &priv->enable,
72 GPIOD_IS_OUT);
73 if (ret) {
74 debug("%s: Warning: cannot get enable GPIO: ret=%d\n",
75 __func__, ret);
76 if (ret != -ENOENT)
Simon Glassa4f737a2018-10-01 12:22:41 -060077 return log_ret(ret);
Simon Glasscd9c2072016-01-21 19:44:59 -070078 }
79
80 return 0;
81}
82
83static int simple_panel_probe(struct udevice *dev)
84{
85 struct simple_panel_priv *priv = dev_get_priv(dev);
86 int ret;
87
Simon Glasse23c6c22016-03-06 19:27:48 -070088 if (IS_ENABLED(CONFIG_DM_REGULATOR) && priv->reg) {
Simon Glasscd9c2072016-01-21 19:44:59 -070089 debug("%s: Enable regulator '%s'\n", __func__, priv->reg->name);
90 ret = regulator_set_enable(priv->reg, true);
91 if (ret)
92 return ret;
93 }
94
95 return 0;
96}
97
98static const struct panel_ops simple_panel_ops = {
99 .enable_backlight = simple_panel_enable_backlight,
Simon Glassa4f737a2018-10-01 12:22:41 -0600100 .set_backlight = simple_panel_set_backlight,
Simon Glasscd9c2072016-01-21 19:44:59 -0700101};
102
103static const struct udevice_id simple_panel_ids[] = {
104 { .compatible = "simple-panel" },
Simon Glassd7659212016-01-30 16:37:50 -0700105 { .compatible = "auo,b133xtn01" },
Simon Glassbb5930d2016-02-21 21:09:01 -0700106 { .compatible = "auo,b116xw03" },
107 { .compatible = "auo,b133htn01" },
Simon Glasscd9c2072016-01-21 19:44:59 -0700108 { }
109};
110
111U_BOOT_DRIVER(simple_panel) = {
112 .name = "simple_panel",
113 .id = UCLASS_PANEL,
114 .of_match = simple_panel_ids,
115 .ops = &simple_panel_ops,
116 .ofdata_to_platdata = simple_panel_ofdata_to_platdata,
117 .probe = simple_panel_probe,
118 .priv_auto_alloc_size = sizeof(struct simple_panel_priv),
119};