nau8825.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 <stdint.h>
#include "chip.h"
 
#if CONFIG(HAVE_ACPI_TABLES)
 
#define NAU8825_ACPI_NAME       "NAU8"
#define NAU8825_ACPI_HID        "10508825"
 
#define NAU8825_DP_INT(key,val) \
        acpi_dp_add_integer(dp, "nuvoton," key, (val))
 
static void nau8825_fill_ssdt(const struct device *dev)
{
        struct drivers_i2c_nau8825_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 = NULL;
 
        if (!scope)
                return;
        if (config->sar_threshold_num > NAU8825_MAX_BUTTONS)
                return;
 
        /* Device */
        acpigen_write_scope(scope);
        acpigen_write_device(acpi_device_name(dev));
        acpigen_write_name_string("_HID", NAU8825_ACPI_HID);
        acpigen_write_name_integer("_UID", 0);
        acpigen_write_name_string("_DDN", dev->chip_ops->name);
        acpigen_write_STA(acpi_device_status(dev));
 
        /* Resources */
        acpigen_write_name("_CRS");
        acpigen_write_resourcetemplate_header();
        acpi_device_write_i2c(&i2c);
        /* Allow either GpioInt() or Interrupt() */
        if (config->irq_gpio.pin_count)
                acpi_device_write_gpio(&config->irq_gpio);
        else
                acpi_device_write_interrupt(&config->irq);
        acpigen_write_resourcetemplate_footer();
 
        /* Device Properties */
        dp = acpi_dp_new_table("_DSD");
        NAU8825_DP_INT("jkdet-enable", config->jkdet_enable);
        NAU8825_DP_INT("jkdet-pull-enable", config->jkdet_pull_enable);
        NAU8825_DP_INT("jkdet-pull-up", config->jkdet_pull_up);
        NAU8825_DP_INT("jkdet-polarity", config->jkdet_polarity);
        NAU8825_DP_INT("vref-impedance", config->vref_impedance);
        NAU8825_DP_INT("micbias-voltage", config->micbias_voltage);
        NAU8825_DP_INT("sar-hysteresis", config->sar_hysteresis);
        NAU8825_DP_INT("sar-voltage", config->sar_voltage);
        NAU8825_DP_INT("sar-compare-time", config->sar_compare_time);
        NAU8825_DP_INT("sar-sampling-time", config->sar_sampling_time);
        NAU8825_DP_INT("short-key-debounce", config->short_key_debounce);
        NAU8825_DP_INT("jack-insert-debounce", config->jack_insert_debounce);
        NAU8825_DP_INT("jack-eject-deboune", config->jack_eject_debounce);
        NAU8825_DP_INT("sar-threshold-num", config->sar_threshold_num);
        acpi_dp_add_integer_array(dp, "nuvoton,sar-threshold",
                          config->sar_threshold, config->sar_threshold_num);
        acpi_dp_write(dp);
 
        acpigen_pop_len(); /* Device */
        acpigen_pop_len(); /* Scope */
 
        printk(BIOS_INFO, "%s: %s address 0%xh irq %d\n",
               acpi_device_path(dev), dev->chip_ops->name,
               dev->path.i2c.device, config->irq.pin);
}
 
static const char *nau8825_acpi_name(const struct device *dev)
{
        return NAU8825_ACPI_NAME;
}
#endif
 
static struct device_operations nau8825_ops = {
        .read_resources         = noop_read_resources,
        .set_resources          = noop_set_resources,
#if CONFIG(HAVE_ACPI_TABLES)
        .acpi_name              = nau8825_acpi_name,
        .acpi_fill_ssdt         = nau8825_fill_ssdt,
#endif
};
 
static void nau8825_enable(struct device *dev)
{
        dev->ops = &nau8825_ops;
}
 
struct chip_operations drivers_i2c_nau8825_ops = {
        CHIP_NAME("Nuvoton NAU8825 Codec")
        .enable_dev = nau8825_enable
};