| // SPDX-License-Identifier: GPL-2.0+ |
| |
| /* |
| * PC-Engines APUv2/APUv3 board platform driver |
| * for gpio buttons and LEDs |
| * |
| * Copyright (C) 2018 metux IT consult |
| * Author: Enrico Weigelt <info@metux.net> |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/dmi.h> |
| #include <linux/err.h> |
| #include <linux/kernel.h> |
| #include <linux/leds.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/gpio_keys.h> |
| #include <linux/gpio/machine.h> |
| #include <linux/input.h> |
| #include <linux/platform_data/gpio/gpio-amd-fch.h> |
| |
| /* |
| * NOTE: this driver only supports APUv2/3 - not APUv1, as this one |
| * has completely different register layouts |
| */ |
| |
| /* register mappings */ |
| #define APU2_GPIO_REG_LED1 AMD_FCH_GPIO_REG_GPIO57 |
| #define APU2_GPIO_REG_LED2 AMD_FCH_GPIO_REG_GPIO58 |
| #define APU2_GPIO_REG_LED3 AMD_FCH_GPIO_REG_GPIO59_DEVSLP1 |
| #define APU2_GPIO_REG_MODESW AMD_FCH_GPIO_REG_GPIO32_GE1 |
| #define APU2_GPIO_REG_SIMSWAP AMD_FCH_GPIO_REG_GPIO33_GE2 |
| |
| /* order in which the gpio lines are defined in the register list */ |
| #define APU2_GPIO_LINE_LED1 0 |
| #define APU2_GPIO_LINE_LED2 1 |
| #define APU2_GPIO_LINE_LED3 2 |
| #define APU2_GPIO_LINE_MODESW 3 |
| #define APU2_GPIO_LINE_SIMSWAP 4 |
| |
| /* gpio device */ |
| |
| static int apu2_gpio_regs[] = { |
| [APU2_GPIO_LINE_LED1] = APU2_GPIO_REG_LED1, |
| [APU2_GPIO_LINE_LED2] = APU2_GPIO_REG_LED2, |
| [APU2_GPIO_LINE_LED3] = APU2_GPIO_REG_LED3, |
| [APU2_GPIO_LINE_MODESW] = APU2_GPIO_REG_MODESW, |
| [APU2_GPIO_LINE_SIMSWAP] = APU2_GPIO_REG_SIMSWAP, |
| }; |
| |
| static const char * const apu2_gpio_names[] = { |
| [APU2_GPIO_LINE_LED1] = "front-led1", |
| [APU2_GPIO_LINE_LED2] = "front-led2", |
| [APU2_GPIO_LINE_LED3] = "front-led3", |
| [APU2_GPIO_LINE_MODESW] = "front-button", |
| [APU2_GPIO_LINE_SIMSWAP] = "simswap", |
| }; |
| |
| static const struct amd_fch_gpio_pdata board_apu2 = { |
| .gpio_num = ARRAY_SIZE(apu2_gpio_regs), |
| .gpio_reg = apu2_gpio_regs, |
| .gpio_names = apu2_gpio_names, |
| }; |
| |
| /* gpio leds device */ |
| |
| static const struct gpio_led apu2_leds[] = { |
| { .name = "apu:green:1" }, |
| { .name = "apu:green:2" }, |
| { .name = "apu:green:3" } |
| }; |
| |
| static const struct gpio_led_platform_data apu2_leds_pdata = { |
| .num_leds = ARRAY_SIZE(apu2_leds), |
| .leds = apu2_leds, |
| }; |
| |
| static struct gpiod_lookup_table gpios_led_table = { |
| .dev_id = "leds-gpio", |
| .table = { |
| GPIO_LOOKUP_IDX(AMD_FCH_GPIO_DRIVER_NAME, APU2_GPIO_LINE_LED1, |
| NULL, 0, GPIO_ACTIVE_LOW), |
| GPIO_LOOKUP_IDX(AMD_FCH_GPIO_DRIVER_NAME, APU2_GPIO_LINE_LED2, |
| NULL, 1, GPIO_ACTIVE_LOW), |
| GPIO_LOOKUP_IDX(AMD_FCH_GPIO_DRIVER_NAME, APU2_GPIO_LINE_LED3, |
| NULL, 2, GPIO_ACTIVE_LOW), |
| } |
| }; |
| |
| /* gpio keyboard device */ |
| |
| static struct gpio_keys_button apu2_keys_buttons[] = { |
| { |
| .code = KEY_SETUP, |
| .active_low = 1, |
| .desc = "front button", |
| .type = EV_KEY, |
| .debounce_interval = 10, |
| .value = 1, |
| }, |
| }; |
| |
| static const struct gpio_keys_platform_data apu2_keys_pdata = { |
| .buttons = apu2_keys_buttons, |
| .nbuttons = ARRAY_SIZE(apu2_keys_buttons), |
| .poll_interval = 100, |
| .rep = 0, |
| .name = "apu2-keys", |
| }; |
| |
| static struct gpiod_lookup_table gpios_key_table = { |
| .dev_id = "gpio-keys-polled", |
| .table = { |
| GPIO_LOOKUP_IDX(AMD_FCH_GPIO_DRIVER_NAME, APU2_GPIO_LINE_MODESW, |
| NULL, 0, GPIO_ACTIVE_LOW), |
| } |
| }; |
| |
| /* board setup */ |
| |
| /* note: matching works on string prefix, so "apu2" must come before "apu" */ |
| static const struct dmi_system_id apu_gpio_dmi_table[] __initconst = { |
| |
| /* APU2 w/ legacy bios < 4.0.8 */ |
| { |
| .ident = "apu2", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"), |
| DMI_MATCH(DMI_BOARD_NAME, "APU2") |
| }, |
| .driver_data = (void *)&board_apu2, |
| }, |
| /* APU2 w/ legacy bios >= 4.0.8 */ |
| { |
| .ident = "apu2", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"), |
| DMI_MATCH(DMI_BOARD_NAME, "apu2") |
| }, |
| .driver_data = (void *)&board_apu2, |
| }, |
| /* APU2 w/ maainline bios */ |
| { |
| .ident = "apu2", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"), |
| DMI_MATCH(DMI_BOARD_NAME, "PC Engines apu2") |
| }, |
| .driver_data = (void *)&board_apu2, |
| }, |
| |
| /* APU3 w/ legacy bios < 4.0.8 */ |
| { |
| .ident = "apu3", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"), |
| DMI_MATCH(DMI_BOARD_NAME, "APU3") |
| }, |
| .driver_data = (void *)&board_apu2, |
| }, |
| /* APU3 w/ legacy bios >= 4.0.8 */ |
| { |
| .ident = "apu3", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"), |
| DMI_MATCH(DMI_BOARD_NAME, "apu3") |
| }, |
| .driver_data = (void *)&board_apu2, |
| }, |
| /* APU3 w/ mainline bios */ |
| { |
| .ident = "apu3", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"), |
| DMI_MATCH(DMI_BOARD_NAME, "PC Engines apu3") |
| }, |
| .driver_data = (void *)&board_apu2, |
| }, |
| {} |
| }; |
| |
| static struct platform_device *apu_gpio_pdev; |
| static struct platform_device *apu_leds_pdev; |
| static struct platform_device *apu_keys_pdev; |
| |
| static struct platform_device * __init apu_create_pdev( |
| const char *name, |
| const void *pdata, |
| size_t sz) |
| { |
| struct platform_device *pdev; |
| |
| pdev = platform_device_register_resndata(NULL, |
| name, |
| PLATFORM_DEVID_NONE, |
| NULL, |
| 0, |
| pdata, |
| sz); |
| |
| if (IS_ERR(pdev)) |
| pr_err("failed registering %s: %ld\n", name, PTR_ERR(pdev)); |
| |
| return pdev; |
| } |
| |
| static int __init apu_board_init(void) |
| { |
| const struct dmi_system_id *id; |
| |
| id = dmi_first_match(apu_gpio_dmi_table); |
| if (!id) { |
| pr_err("failed to detect apu board via dmi\n"); |
| return -ENODEV; |
| } |
| |
| gpiod_add_lookup_table(&gpios_led_table); |
| gpiod_add_lookup_table(&gpios_key_table); |
| |
| apu_gpio_pdev = apu_create_pdev( |
| AMD_FCH_GPIO_DRIVER_NAME, |
| id->driver_data, |
| sizeof(struct amd_fch_gpio_pdata)); |
| |
| apu_leds_pdev = apu_create_pdev( |
| "leds-gpio", |
| &apu2_leds_pdata, |
| sizeof(apu2_leds_pdata)); |
| |
| apu_keys_pdev = apu_create_pdev( |
| "gpio-keys-polled", |
| &apu2_keys_pdata, |
| sizeof(apu2_keys_pdata)); |
| |
| return 0; |
| } |
| |
| static void __exit apu_board_exit(void) |
| { |
| gpiod_remove_lookup_table(&gpios_led_table); |
| gpiod_remove_lookup_table(&gpios_key_table); |
| |
| platform_device_unregister(apu_keys_pdev); |
| platform_device_unregister(apu_leds_pdev); |
| platform_device_unregister(apu_gpio_pdev); |
| } |
| |
| module_init(apu_board_init); |
| module_exit(apu_board_exit); |
| |
| MODULE_AUTHOR("Enrico Weigelt, metux IT consult <info@metux.net>"); |
| MODULE_DESCRIPTION("PC Engines APUv2/APUv3 board GPIO/LED/keys driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_DEVICE_TABLE(dmi, apu_gpio_dmi_table); |
| MODULE_ALIAS("platform:pcengines-apuv2"); |
| MODULE_SOFTDEP("pre: platform:" AMD_FCH_GPIO_DRIVER_NAME); |
| MODULE_SOFTDEP("pre: platform:leds-gpio"); |
| MODULE_SOFTDEP("pre: platform:gpio_keys_polled"); |