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
rk_key_ofdata_to_platdata(struct udevice * dev)11*4882a593Smuzhiyun static int rk_key_ofdata_to_platdata(struct udevice *dev)
12*4882a593Smuzhiyun {
13*4882a593Smuzhiyun struct dm_key_uclass_platdata *uc_key;
14*4882a593Smuzhiyun u32 chn[2];
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun uc_key = dev_get_uclass_platdata(dev);
17*4882a593Smuzhiyun if (!uc_key)
18*4882a593Smuzhiyun return -ENXIO;
19*4882a593Smuzhiyun
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
23*4882a593Smuzhiyun if (dev_read_u32_array(dev_get_parent(dev), "io-channels", chn, 2)) {
24*4882a593Smuzhiyun printf("%s: read 'io-channels' failed\n", uc_key->name);
25*4882a593Smuzhiyun return -EINVAL;
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun if (dev_read_bool(dev, "rockchip,adc_value")) {
29*4882a593Smuzhiyun uc_key->type = ADC_KEY;
30*4882a593Smuzhiyun uc_key->in_volt = 0;
31*4882a593Smuzhiyun uc_key->channel = chn[1];
32*4882a593Smuzhiyun uc_key->center = dev_read_u32_default(dev, "rockchip,adc_value", 0);
33*4882a593Smuzhiyun uc_key->min = uc_key->center - 30;
34*4882a593Smuzhiyun if (uc_key->min < 0)
35*4882a593Smuzhiyun uc_key->min = 0;
36*4882a593Smuzhiyun uc_key->max = uc_key->center + 30;
37*4882a593Smuzhiyun } else {
38*4882a593Smuzhiyun uc_key->type = GPIO_KEY;
39*4882a593Smuzhiyun if (dev_read_u32_array(dev, "gpios",
40*4882a593Smuzhiyun uc_key->gpios,
41*4882a593Smuzhiyun ARRAY_SIZE(uc_key->gpios))) {
42*4882a593Smuzhiyun printf("%s: read 'gpios' failed\n", uc_key->name);
43*4882a593Smuzhiyun return -EINVAL;
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun return 0;
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun U_BOOT_DRIVER(rk_key) = {
51*4882a593Smuzhiyun .name = "rk_key",
52*4882a593Smuzhiyun .id = UCLASS_KEY,
53*4882a593Smuzhiyun .ofdata_to_platdata = rk_key_ofdata_to_platdata,
54*4882a593Smuzhiyun };
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun /* Key Bus */
rk_key_bus_bind(struct udevice * dev)57*4882a593Smuzhiyun static int rk_key_bus_bind(struct udevice *dev)
58*4882a593Smuzhiyun {
59*4882a593Smuzhiyun return key_bind_children(dev, "rk_key");
60*4882a593Smuzhiyun }
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun static const struct udevice_id rk_key_bus_match[] = {
63*4882a593Smuzhiyun { .compatible = "rockchip,key" },
64*4882a593Smuzhiyun { },
65*4882a593Smuzhiyun };
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun U_BOOT_DRIVER(rk_key_bus) = {
68*4882a593Smuzhiyun .name = "rk_key_bus",
69*4882a593Smuzhiyun .id = UCLASS_SIMPLE_BUS,
70*4882a593Smuzhiyun .of_match = rk_key_bus_match,
71*4882a593Smuzhiyun .bind = rk_key_bus_bind,
72*4882a593Smuzhiyun };
73