diff --git a/MAINTAINERS b/MAINTAINERS index 5e4135c78862..1e1351bc366d 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11522,6 +11522,11 @@ F: lib/parman.c F: lib/test_parman.c F: include/linux/parman.h +PC ENGINES APU BOARD DRIVER +M: Enrico Weigelt, metux IT consult +S: Maintained +F: drivers/platform/x86/pcengines-apuv2.c + PC87360 HARDWARE MONITORING DRIVER M: Jim Cromie L: linux-hwmon@vger.kernel.org diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index b5e9db85e881..851ea921a58d 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -1303,6 +1303,18 @@ config HUAWEI_WMI To compile this driver as a module, choose M here: the module will be called huawei-wmi. +config PCENGINES_APU2 + tristate "PC Engines APUv2/3 front button and LEDs driver" + select GPIO_AMD_FCH + select KEYBOARD_GPIO_POLLED + select LEDS_GPIO + help + This driver provides support for the front button and LEDs on + PC Engines APUv2/APUv3 board. + + To compile this driver as a module, choose M here: the module + will be called pcengines-apuv2. + endif # X86_PLATFORM_DEVICES config PMC_ATOM diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile index ce8da260c223..86cb76677bc8 100644 --- a/drivers/platform/x86/Makefile +++ b/drivers/platform/x86/Makefile @@ -96,3 +96,4 @@ obj-$(CONFIG_INTEL_TURBO_MAX_3) += intel_turbo_max_3.o obj-$(CONFIG_INTEL_CHTDC_TI_PWRBTN) += intel_chtdc_ti_pwrbtn.o obj-$(CONFIG_I2C_MULTI_INSTANTIATE) += i2c-multi-instantiate.o obj-$(CONFIG_INTEL_ATOMISP2_PM) += intel_atomisp2_pm.o +obj-$(CONFIG_PCENGINES_APU2) += pcengines-apuv2.o diff --git a/drivers/platform/x86/pcengines-apuv2.c b/drivers/platform/x86/pcengines-apuv2.c new file mode 100644 index 000000000000..dcb084f6b892 --- /dev/null +++ b/drivers/platform/x86/pcengines-apuv2.c @@ -0,0 +1,261 @@ +// 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 + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * 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, +}; + +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", +}; + +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) +{ + int rc; + 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 "); +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");