/* SPDX-License-Identifier: GPL-2.0-only */ #include <acpi/acpi_device.h> #include <acpi/acpigen.h> #include <console/console.h> #include <device/i2c_simple.h> #include <device/device.h> #include <stdio.h> #include "chip.h" #define MAX98396_ACPI_HID "ADS8396" static void max98396_fill_ssdt(const struct device *dev) { struct drivers_i2c_max98396_config *config = dev->chip_info; const char *scope = acpi_device_scope(dev); struct acpi_i2c i2c = { .address = dev->path.i2c.device, .mode_10bit = dev->path.i2c.mode_10bit, .speed = config->bus_speed ? : I2C_SPEED_FAST, .resource = scope, }; struct acpi_dp *dp; const char *path = acpi_device_path(dev); if (!scope) { printk(BIOS_ERR, "%s: dev not enabled\n", __func__); return; } /* Device */ acpigen_write_scope(scope); acpigen_write_device(acpi_device_name(dev)); acpigen_write_name_string("_HID", MAX98396_ACPI_HID); acpigen_write_name_integer("_UID", config->uid); if (config->desc) acpigen_write_name_string("_DDN", config->desc); acpigen_write_STA(acpi_device_status(dev)); /* Resources */ acpigen_write_name("_CRS"); acpigen_write_resourcetemplate_header(); acpi_device_write_i2c(&i2c); if (config->reset_gpio.pin_count) acpi_device_write_gpio(&config->reset_gpio); acpigen_write_resourcetemplate_footer(); /* Device Properties */ dp = acpi_dp_new_table("_DSD"); acpi_dp_add_integer(dp, "adi,vmon-slot-no", config->vmon_slot_no); acpi_dp_add_integer(dp, "adi,imon-slot-no", config->imon_slot_no); acpi_dp_add_integer(dp, "adi,spkfb-slot-no", config->spkfb_slot_no); if (config->reset_gpio.pin_count) acpi_dp_add_gpio(dp, "reset-gpios", path, 0, /* Index = 0 */ 0, /* Pin = 0 */ config->reset_gpio.active_low); acpi_dp_write(dp); acpigen_write_device_end(); acpigen_write_scope_end(); printk(BIOS_INFO, "%s: %s address 0%xh\n", acpi_device_path(dev), dev->chip_ops->name, dev->path.i2c.device); } static const char *max98396_acpi_name(const struct device *dev) { struct drivers_i2c_max98396_config *config = dev->chip_info; static char name[ACPI_NAME_BUFFER_SIZE]; if (config->name && strlen(config->name) == 4) return config->name; snprintf(name, sizeof(name), "D%03.3X", dev->path.i2c.device); return name; } static struct device_operations max98396_ops = { .read_resources = noop_read_resources, .set_resources = noop_set_resources, .acpi_name = max98396_acpi_name, .acpi_fill_ssdt = max98396_fill_ssdt, }; static void max98396_enable(struct device *dev) { struct drivers_i2c_max98396_config *config = dev->chip_info; dev->ops = &max98396_ops; if (config->desc) dev->name = config->desc; } struct chip_operations drivers_i2c_max98396_ops = { .name = "Maxim MAX98396 Codec", .enable_dev = max98396_enable };