1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * (C) Copyright 2017 Rockchip Electronics Co., Ltd
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <common.h>
8*4882a593Smuzhiyun #include <dm.h>
9*4882a593Smuzhiyun #include <key.h>
10*4882a593Smuzhiyun
gpio_key_ofdata_to_platdata(struct udevice * dev)11*4882a593Smuzhiyun static int gpio_key_ofdata_to_platdata(struct udevice *dev)
12*4882a593Smuzhiyun {
13*4882a593Smuzhiyun struct dm_key_uclass_platdata *uc_key;
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun uc_key = dev_get_uclass_platdata(dev);
16*4882a593Smuzhiyun if (!uc_key)
17*4882a593Smuzhiyun return -ENXIO;
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun uc_key->type = GPIO_KEY;
20*4882a593Smuzhiyun uc_key->name = dev_read_string(dev, "label");
21*4882a593Smuzhiyun uc_key->code = dev_read_u32_default(dev, "linux,code", -ENODATA);
22*4882a593Smuzhiyun if (uc_key->code < 0) {
23*4882a593Smuzhiyun printf("%s: read 'linux,code' failed\n", uc_key->name);
24*4882a593Smuzhiyun return -EINVAL;
25*4882a593Smuzhiyun }
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun if (dev_read_u32_array(dev, "gpios",
28*4882a593Smuzhiyun uc_key->gpios, ARRAY_SIZE(uc_key->gpios))) {
29*4882a593Smuzhiyun printf("%s: read 'gpios' failed\n", uc_key->name);
30*4882a593Smuzhiyun return -EINVAL;
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun return 0;
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun U_BOOT_DRIVER(gpio_key) = {
37*4882a593Smuzhiyun .name = "gpio_key",
38*4882a593Smuzhiyun .id = UCLASS_KEY,
39*4882a593Smuzhiyun .ofdata_to_platdata = gpio_key_ofdata_to_platdata,
40*4882a593Smuzhiyun };
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun /* Key Bus */
gpio_key_bus_bind(struct udevice * dev)43*4882a593Smuzhiyun static int gpio_key_bus_bind(struct udevice *dev)
44*4882a593Smuzhiyun {
45*4882a593Smuzhiyun return key_bind_children(dev, "gpio_key");
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun static const struct udevice_id gpio_key_bus_match[] = {
49*4882a593Smuzhiyun { .compatible = "gpio-keys" },
50*4882a593Smuzhiyun { },
51*4882a593Smuzhiyun };
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun U_BOOT_DRIVER(gpio_key_bus) = {
54*4882a593Smuzhiyun .name = "gpio_key_bus",
55*4882a593Smuzhiyun .id = UCLASS_SIMPLE_BUS,
56*4882a593Smuzhiyun .of_match = gpio_key_bus_match,
57*4882a593Smuzhiyun .bind = gpio_key_bus_bind,
58*4882a593Smuzhiyun };
59