1debee64aSJoseph Chen /*
2debee64aSJoseph Chen * (C) Copyright 2017 Rockchip Electronics Co., Ltd
3debee64aSJoseph Chen *
4debee64aSJoseph Chen * SPDX-License-Identifier: GPL-2.0+
5debee64aSJoseph Chen */
6debee64aSJoseph Chen
7debee64aSJoseph Chen #include <common.h>
8debee64aSJoseph Chen #include <dm.h>
9debee64aSJoseph Chen #include <key.h>
10debee64aSJoseph Chen
rk_key_ofdata_to_platdata(struct udevice * dev)115a54baa7SJoseph Chen static int rk_key_ofdata_to_platdata(struct udevice *dev)
12debee64aSJoseph Chen {
135a54baa7SJoseph Chen struct dm_key_uclass_platdata *uc_key;
145a54baa7SJoseph Chen u32 chn[2];
15debee64aSJoseph Chen
165a54baa7SJoseph Chen uc_key = dev_get_uclass_platdata(dev);
175a54baa7SJoseph Chen if (!uc_key)
185a54baa7SJoseph Chen return -ENXIO;
19debee64aSJoseph Chen
205a54baa7SJoseph Chen uc_key->name = dev_read_string(dev, "label");
215a54baa7SJoseph Chen uc_key->code = dev_read_u32_default(dev, "linux,code", -ENODATA);
22debee64aSJoseph Chen
235a54baa7SJoseph Chen if (dev_read_u32_array(dev_get_parent(dev), "io-channels", chn, 2)) {
245a54baa7SJoseph Chen printf("%s: read 'io-channels' failed\n", uc_key->name);
25debee64aSJoseph Chen return -EINVAL;
26debee64aSJoseph Chen }
27debee64aSJoseph Chen
285a54baa7SJoseph Chen if (dev_read_bool(dev, "rockchip,adc_value")) {
295a54baa7SJoseph Chen uc_key->type = ADC_KEY;
30*15da1b50SJoseph Chen uc_key->in_volt = 0;
315a54baa7SJoseph Chen uc_key->channel = chn[1];
32*15da1b50SJoseph Chen uc_key->center = dev_read_u32_default(dev, "rockchip,adc_value", 0);
33*15da1b50SJoseph Chen uc_key->min = uc_key->center - 30;
34*15da1b50SJoseph Chen if (uc_key->min < 0)
35*15da1b50SJoseph Chen uc_key->min = 0;
36*15da1b50SJoseph Chen uc_key->max = uc_key->center + 30;
37debee64aSJoseph Chen } else {
385a54baa7SJoseph Chen uc_key->type = GPIO_KEY;
395a54baa7SJoseph Chen if (dev_read_u32_array(dev, "gpios",
405a54baa7SJoseph Chen uc_key->gpios,
415a54baa7SJoseph Chen ARRAY_SIZE(uc_key->gpios))) {
425a54baa7SJoseph Chen printf("%s: read 'gpios' failed\n", uc_key->name);
435a54baa7SJoseph Chen return -EINVAL;
44debee64aSJoseph Chen }
45debee64aSJoseph Chen }
46debee64aSJoseph Chen
47debee64aSJoseph Chen return 0;
48debee64aSJoseph Chen }
49debee64aSJoseph Chen
505a54baa7SJoseph Chen U_BOOT_DRIVER(rk_key) = {
515a54baa7SJoseph Chen .name = "rk_key",
525a54baa7SJoseph Chen .id = UCLASS_KEY,
535a54baa7SJoseph Chen .ofdata_to_platdata = rk_key_ofdata_to_platdata,
54debee64aSJoseph Chen };
55debee64aSJoseph Chen
565a54baa7SJoseph Chen /* Key Bus */
rk_key_bus_bind(struct udevice * dev)575a54baa7SJoseph Chen static int rk_key_bus_bind(struct udevice *dev)
585a54baa7SJoseph Chen {
595a54baa7SJoseph Chen return key_bind_children(dev, "rk_key");
605a54baa7SJoseph Chen }
615a54baa7SJoseph Chen
625a54baa7SJoseph Chen static const struct udevice_id rk_key_bus_match[] = {
63debee64aSJoseph Chen { .compatible = "rockchip,key" },
64debee64aSJoseph Chen { },
65debee64aSJoseph Chen };
66debee64aSJoseph Chen
675a54baa7SJoseph Chen U_BOOT_DRIVER(rk_key_bus) = {
685a54baa7SJoseph Chen .name = "rk_key_bus",
695a54baa7SJoseph Chen .id = UCLASS_SIMPLE_BUS,
705a54baa7SJoseph Chen .of_match = rk_key_bus_match,
715a54baa7SJoseph Chen .bind = rk_key_bus_bind,
72debee64aSJoseph Chen };
73