/* SPDX-License-Identifier: GPL-2.0-only */ #include <acpi/acpi_device.h> #include <acpi/acpigen.h> #include <device/device.h> #include <device/path.h> #include <string.h> #include "chip.h" static struct acpi_dp *gpio_keys_add_child_node( struct drivers_generic_gpio_keys_config *config, const char *parent_path) { struct key_info *key = &config->key; struct acpi_dp *dsd; if (!key->dev_name || !key->linux_code) return NULL; dsd = acpi_dp_new_table(config->key.dev_name); acpi_dp_add_integer(dsd, "linux,code", key->linux_code); if (key->linux_input_type) acpi_dp_add_integer(dsd, "linux,input-type", key->linux_input_type); if (key->label) acpi_dp_add_string(dsd, "label", key->label); if (key->wakeup_route == WAKEUP_ROUTE_SCI) acpigen_write_PRW(key->wake_gpe, 3); if (key->wakeup_route != WAKEUP_ROUTE_DISABLED) { acpi_dp_add_integer(dsd, "wakeup-source", 1); acpi_dp_add_integer(dsd, "wakeup-event-action", key->wakeup_event_action); } if (key->can_be_disabled) acpi_dp_add_integer(dsd, "linux,can-disable", key->can_be_disabled); if (key->debounce_interval) acpi_dp_add_integer(dsd, "debounce-interval", key->debounce_interval); acpi_dp_add_gpio(dsd, "gpios", parent_path, 0, 0, config->gpio.active_low); return dsd; } static void gpio_keys_fill_ssdt_generator(const struct device *dev) { struct drivers_generic_gpio_keys_config *config = dev->chip_info; const char *scope = acpi_device_scope(dev); const char *path = acpi_device_path(dev); struct acpi_dp *dsd, *child; const char *drv_string = config->is_polled ? "gpio-keys-polled" : "gpio-keys"; if (!scope || !path || !config->gpio.pin_count) return; /* Device */ acpigen_write_scope(scope); acpigen_write_device(acpi_device_name(dev)); /* _HID is set to PRP0001 */ acpigen_write_name_string("_HID", ACPI_DT_NAMESPACE_HID); /* Resources - _CRS */ acpigen_write_name("_CRS"); acpigen_write_resourcetemplate_header(); acpi_device_write_gpio(&config->gpio); acpigen_write_resourcetemplate_footer(); /* DSD */ dsd = acpi_dp_new_table("_DSD"); acpi_dp_add_string(dsd, "compatible", drv_string); if (config->label) acpi_dp_add_string(dsd, "label", config->label); if (config->is_polled) acpi_dp_add_integer(dsd, "poll-interval", config->poll_interval); /* Child device defining key */ child = gpio_keys_add_child_node(config, path); if (child) acpi_dp_add_child(dsd, "button-0", child); acpi_dp_write(dsd); acpigen_pop_len(); /* Device */ acpigen_pop_len(); /* Scope */ } static const char *gpio_keys_acpi_name(const struct device *dev) { struct drivers_generic_gpio_keys_config *config = dev->chip_info; static char name[5]; if (config->name) return config->name; snprintf(name, sizeof(name), "K%03.3X", config->gpio.pins[0]); name[4] = '\0'; return name; } static struct device_operations gpio_keys_ops = { .read_resources = noop_read_resources, .set_resources = noop_set_resources, .acpi_name = gpio_keys_acpi_name, .acpi_fill_ssdt = gpio_keys_fill_ssdt_generator, }; static void gpio_keys_enable(struct device *dev) { dev->ops = &gpio_keys_ops; } struct chip_operations drivers_generic_gpio_keys_ops = { CHIP_NAME("GPIO Keys") .enable_dev = gpio_keys_enable };