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cd9c2070 SG |
1 | /* |
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 | ||
15 | DECLARE_GLOBAL_DATA_PTR; | |
16 | ||
17 | struct simple_panel_priv { | |
18 | struct udevice *reg; | |
19 | struct udevice *backlight; | |
20 | struct gpio_desc enable; | |
21 | }; | |
22 | ||
23 | static 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 | ||
36 | static int simple_panel_ofdata_to_platdata(struct udevice *dev) | |
37 | { | |
38 | struct simple_panel_priv *priv = dev_get_priv(dev); | |
39 | int ret; | |
40 | ||
e23c6c28 SG |
41 | 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 | } | |
cd9c2070 SG |
50 | } |
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 | ||
69 | static int simple_panel_probe(struct udevice *dev) | |
70 | { | |
71 | struct simple_panel_priv *priv = dev_get_priv(dev); | |
72 | int ret; | |
73 | ||
e23c6c28 | 74 | if (IS_ENABLED(CONFIG_DM_REGULATOR) && priv->reg) { |
cd9c2070 SG |
75 | 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 | ||
84 | static const struct panel_ops simple_panel_ops = { | |
85 | .enable_backlight = simple_panel_enable_backlight, | |
86 | }; | |
87 | ||
88 | static const struct udevice_id simple_panel_ids[] = { | |
89 | { .compatible = "simple-panel" }, | |
d7659212 | 90 | { .compatible = "auo,b133xtn01" }, |
bb5930d5 SG |
91 | { .compatible = "auo,b116xw03" }, |
92 | { .compatible = "auo,b133htn01" }, | |
cd9c2070 SG |
93 | { } |
94 | }; | |
95 | ||
96 | U_BOOT_DRIVER(simple_panel) = { | |
97 | .name = "simple_panel", | |
98 | .id = UCLASS_PANEL, | |
99 | .of_match = simple_panel_ids, | |
100 | .ops = &simple_panel_ops, | |
101 | .ofdata_to_platdata = simple_panel_ofdata_to_platdata, | |
102 | .probe = simple_panel_probe, | |
103 | .priv_auto_alloc_size = sizeof(struct simple_panel_priv), | |
104 | }; |