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7#include <common.h>
8#include <backlight.h>
9#include <dm.h>
10#include <log.h>
11#include <panel.h>
12#include <asm/gpio.h>
13#include <power/regulator.h>
14
15struct simple_panel_priv {
16 struct udevice *reg;
17 struct udevice *backlight;
18 struct gpio_desc enable;
19};
20
21static int simple_panel_enable_backlight(struct udevice *dev)
22{
23 struct simple_panel_priv *priv = dev_get_priv(dev);
24 int ret;
25
26 debug("%s: start, backlight = '%s'\n", __func__, priv->backlight->name);
27 dm_gpio_set_value(&priv->enable, 1);
28 ret = backlight_enable(priv->backlight);
29 debug("%s: done, ret = %d\n", __func__, ret);
30 if (ret)
31 return ret;
32
33 return 0;
34}
35
36static int simple_panel_set_backlight(struct udevice *dev, int percent)
37{
38 struct simple_panel_priv *priv = dev_get_priv(dev);
39 int ret;
40
41 debug("%s: start, backlight = '%s'\n", __func__, priv->backlight->name);
42 dm_gpio_set_value(&priv->enable, 1);
43 ret = backlight_set_brightness(priv->backlight, percent);
44 debug("%s: done, ret = %d\n", __func__, ret);
45 if (ret)
46 return ret;
47
48 return 0;
49}
50
51static int simple_panel_of_to_plat(struct udevice *dev)
52{
53 struct simple_panel_priv *priv = dev_get_priv(dev);
54 int ret;
55
56 if (IS_ENABLED(CONFIG_DM_REGULATOR)) {
57 ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
58 "power-supply", &priv->reg);
59 if (ret) {
60 debug("%s: Warning: cannot get power supply: ret=%d\n",
61 __func__, ret);
62 if (ret != -ENOENT)
63 return ret;
64 }
65 }
66 ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev,
67 "backlight", &priv->backlight);
68 if (ret) {
69 debug("%s: Cannot get backlight: ret=%d\n", __func__, ret);
70 return log_ret(ret);
71 }
72 ret = gpio_request_by_name(dev, "enable-gpios", 0, &priv->enable,
73 GPIOD_IS_OUT);
74 if (ret) {
75 debug("%s: Warning: cannot get enable GPIO: ret=%d\n",
76 __func__, ret);
77 if (ret != -ENOENT)
78 return log_ret(ret);
79 }
80
81 return 0;
82}
83
84static int simple_panel_probe(struct udevice *dev)
85{
86 struct simple_panel_priv *priv = dev_get_priv(dev);
87 int ret;
88
89 if (IS_ENABLED(CONFIG_DM_REGULATOR) && priv->reg) {
90 debug("%s: Enable regulator '%s'\n", __func__, priv->reg->name);
91 ret = regulator_set_enable(priv->reg, true);
92 if (ret)
93 return ret;
94 }
95
96 return 0;
97}
98
99static const struct panel_ops simple_panel_ops = {
100 .enable_backlight = simple_panel_enable_backlight,
101 .set_backlight = simple_panel_set_backlight,
102};
103
104static const struct udevice_id simple_panel_ids[] = {
105 { .compatible = "simple-panel" },
106 { .compatible = "auo,b133xtn01" },
107 { .compatible = "auo,b116xw03" },
108 { .compatible = "auo,b133htn01" },
109 { .compatible = "boe,nv140fhmn49" },
110 { .compatible = "lg,lb070wv8" },
111 { .compatible = "sharp,lq123p1jx31" },
112 { .compatible = "boe,nv101wxmn51" },
113 { }
114};
115
116U_BOOT_DRIVER(simple_panel) = {
117 .name = "simple_panel",
118 .id = UCLASS_PANEL,
119 .of_match = simple_panel_ids,
120 .ops = &simple_panel_ops,
121 .of_to_plat = simple_panel_of_to_plat,
122 .probe = simple_panel_probe,
123 .priv_auto = sizeof(struct simple_panel_priv),
124};
125
