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