1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (c) 2016 Google, Inc
3*4882a593Smuzhiyun * Written by Simon Glass <sjg@chromium.org>
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <common.h>
9*4882a593Smuzhiyun #include <backlight.h>
10*4882a593Smuzhiyun #include <dm.h>
11*4882a593Smuzhiyun #include <panel.h>
12*4882a593Smuzhiyun #include <asm/gpio.h>
13*4882a593Smuzhiyun #include <power/regulator.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun DECLARE_GLOBAL_DATA_PTR;
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun struct simple_panel_priv {
18*4882a593Smuzhiyun struct udevice *reg;
19*4882a593Smuzhiyun struct udevice *backlight;
20*4882a593Smuzhiyun struct gpio_desc enable;
21*4882a593Smuzhiyun };
22*4882a593Smuzhiyun
simple_panel_enable_backlight(struct udevice * dev)23*4882a593Smuzhiyun static int simple_panel_enable_backlight(struct udevice *dev)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun struct simple_panel_priv *priv = dev_get_priv(dev);
26*4882a593Smuzhiyun int ret;
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun debug("%s: start, backlight = '%s'\n", __func__, priv->backlight->name);
29*4882a593Smuzhiyun dm_gpio_set_value(&priv->enable, 1);
30*4882a593Smuzhiyun ret = backlight_enable(priv->backlight);
31*4882a593Smuzhiyun debug("%s: done, ret = %d\n", __func__, ret);
32*4882a593Smuzhiyun if (ret)
33*4882a593Smuzhiyun return ret;
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun return 0;
36*4882a593Smuzhiyun }
37*4882a593Smuzhiyun
simple_panel_ofdata_to_platdata(struct udevice * dev)38*4882a593Smuzhiyun static int simple_panel_ofdata_to_platdata(struct udevice *dev)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun struct simple_panel_priv *priv = dev_get_priv(dev);
41*4882a593Smuzhiyun int ret;
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun if (IS_ENABLED(CONFIG_DM_REGULATOR)) {
44*4882a593Smuzhiyun ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
45*4882a593Smuzhiyun "power-supply", &priv->reg);
46*4882a593Smuzhiyun if (ret) {
47*4882a593Smuzhiyun debug("%s: Warning: cannot get power supply: ret=%d\n",
48*4882a593Smuzhiyun __func__, ret);
49*4882a593Smuzhiyun if (ret != -ENOENT)
50*4882a593Smuzhiyun return ret;
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev,
54*4882a593Smuzhiyun "backlight", &priv->backlight);
55*4882a593Smuzhiyun if (ret) {
56*4882a593Smuzhiyun debug("%s: Cannot get backlight: ret=%d\n", __func__, ret);
57*4882a593Smuzhiyun return ret;
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun ret = gpio_request_by_name(dev, "enable-gpios", 0, &priv->enable,
60*4882a593Smuzhiyun GPIOD_IS_OUT);
61*4882a593Smuzhiyun if (ret) {
62*4882a593Smuzhiyun debug("%s: Warning: cannot get enable GPIO: ret=%d\n",
63*4882a593Smuzhiyun __func__, ret);
64*4882a593Smuzhiyun if (ret != -ENOENT)
65*4882a593Smuzhiyun return ret;
66*4882a593Smuzhiyun }
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun return 0;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
simple_panel_probe(struct udevice * dev)71*4882a593Smuzhiyun static int simple_panel_probe(struct udevice *dev)
72*4882a593Smuzhiyun {
73*4882a593Smuzhiyun struct simple_panel_priv *priv = dev_get_priv(dev);
74*4882a593Smuzhiyun int ret;
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun if (IS_ENABLED(CONFIG_DM_REGULATOR) && priv->reg) {
77*4882a593Smuzhiyun debug("%s: Enable regulator '%s'\n", __func__, priv->reg->name);
78*4882a593Smuzhiyun ret = regulator_set_enable(priv->reg, true);
79*4882a593Smuzhiyun if (ret)
80*4882a593Smuzhiyun return ret;
81*4882a593Smuzhiyun }
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun return 0;
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun static const struct panel_ops simple_panel_ops = {
87*4882a593Smuzhiyun .enable_backlight = simple_panel_enable_backlight,
88*4882a593Smuzhiyun };
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun static const struct udevice_id simple_panel_ids[] = {
91*4882a593Smuzhiyun { .compatible = "simple-panel" },
92*4882a593Smuzhiyun { .compatible = "auo,b133xtn01" },
93*4882a593Smuzhiyun { .compatible = "auo,b116xw03" },
94*4882a593Smuzhiyun { .compatible = "auo,b133htn01" },
95*4882a593Smuzhiyun { }
96*4882a593Smuzhiyun };
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun U_BOOT_DRIVER(simple_panel) = {
99*4882a593Smuzhiyun .name = "simple_panel",
100*4882a593Smuzhiyun .id = UCLASS_PANEL,
101*4882a593Smuzhiyun .of_match = simple_panel_ids,
102*4882a593Smuzhiyun .ops = &simple_panel_ops,
103*4882a593Smuzhiyun .ofdata_to_platdata = simple_panel_ofdata_to_platdata,
104*4882a593Smuzhiyun .probe = simple_panel_probe,
105*4882a593Smuzhiyun .priv_auto_alloc_size = sizeof(struct simple_panel_priv),
106*4882a593Smuzhiyun };
107