max98927.c

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/* 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 <device/path.h>
#include "chip.h"
 
#define MAX98927_ACPI_NAME      "MAXI"
#define MAX98927_ACPI_HID       "MX98927"
 
static void max98927_fill_ssdt(const struct device *dev)
{
        struct drivers_i2c_max98927_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;
 
        if (!scope)
                return;
 
        /* Device */
        acpigen_write_scope(scope);
        acpigen_write_device(acpi_device_name(dev));
        acpigen_write_name_string("_HID", MAX98927_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);
        acpigen_write_resourcetemplate_footer();
 
        /* Device Properties */
        dp = acpi_dp_new_table("_DSD");
 
        acpi_dp_add_integer(dp, "interleave_mode", config->interleave_mode);
        acpi_dp_add_integer(dp, "vmon-slot-no", config->vmon_slot_no);
        acpi_dp_add_integer(dp, "imon-slot-no", config->imon_slot_no);
 
        acpi_dp_write(dp);
 
        acpigen_pop_len(); /* Device */
        acpigen_pop_len(); /* Scope */
 
        printk(BIOS_INFO, "%s: %s address 0%xh\n", acpi_device_path(dev),
                        dev->chip_ops->name, dev->path.i2c.device);
}
 
static const char *max98927_acpi_name(const struct device *dev)
{
        struct drivers_i2c_max98927_config *config = dev->chip_info;
 
        if (config->name)
                return config->name;
 
        return MAX98927_ACPI_NAME;
}
 
static struct device_operations max98927_ops = {
        .read_resources         = noop_read_resources,
        .set_resources          = noop_set_resources,
        .acpi_name              = max98927_acpi_name,
        .acpi_fill_ssdt         = max98927_fill_ssdt,
};
 
static void max98927_enable(struct device *dev)
{
        struct drivers_i2c_max98927_config *config = dev->chip_info;
 
        dev->ops = &max98927_ops;
 
        if (config && config->desc) {
                dev->name = config->desc;
        }
}
 
struct chip_operations drivers_i2c_max98927_ops = {
        CHIP_NAME("Maxim MAX98927 Codec")
        .enable_dev = max98927_enable
};