src/drivers/i2c/nau8825/nau8825.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <acpi/acpi_device.h>
   4 #include <acpi/acpigen.h>
   5 #include <console/console.h>
   6 #include <device/i2c_simple.h>
   7 #include <device/device.h>
   8 #include <stdint.h>
   9 #include "chip.h"
  10
  11 #if CONFIG(HAVE_ACPI_TABLES)
  12
  13 #define NAU8825_ACPI_NAME       "NAU8"
  14 #define NAU8825_ACPI_HID        "10508825"
  15
  16 #define NAU8825_DP_INT(key,val) \
  17         acpi_dp_add_integer(dp, "nuvoton," key, (val))
  18
  19 static void nau8825_fill_ssdt(const struct device *dev)
  20 {
  21         struct drivers_i2c_nau8825_config *config = dev->chip_info;
  22         const char *scope = acpi_device_scope(dev);
  23         struct acpi_i2c i2c = {
  24                 .address = dev->path.i2c.device,
  25                 .mode_10bit = dev->path.i2c.mode_10bit,
  26                 .speed = config->bus_speed ? : I2C_SPEED_FAST,
  27                 .resource = scope,
  28         };
  29         struct acpi_dp *dp = NULL;
  30
  31         if (!scope)
  32                 return;
  33         if (config->sar_threshold_num > NAU8825_MAX_BUTTONS)
  34                 return;
  35
  36         /* Device */
  37         acpigen_write_scope(scope);
  38         acpigen_write_device(acpi_device_name(dev));
  39         acpigen_write_name_string("_HID", NAU8825_ACPI_HID);
  40         acpigen_write_name_integer("_UID", 0);
  41         acpigen_write_name_string("_DDN", dev->chip_ops->name);
  42         acpigen_write_STA(acpi_device_status(dev));
  43
  44         /* Resources */
  45         acpigen_write_name("_CRS");
  46         acpigen_write_resourcetemplate_header();
  47         acpi_device_write_i2c(&i2c);
  48         /* Allow either GpioInt() or Interrupt() */
  49         if (config->irq_gpio.pin_count)
  50                 acpi_device_write_gpio(&config->irq_gpio);
  51         else
  52                 acpi_device_write_interrupt(&config->irq);
  53         acpigen_write_resourcetemplate_footer();
  54
  55         /* Device Properties */
  56         dp = acpi_dp_new_table("_DSD");
  57         NAU8825_DP_INT("jkdet-enable", config->jkdet_enable);
  58         NAU8825_DP_INT("jkdet-pull-enable", config->jkdet_pull_enable);
  59         NAU8825_DP_INT("jkdet-pull-up", config->jkdet_pull_up);
  60         NAU8825_DP_INT("jkdet-polarity", config->jkdet_polarity);
  61         NAU8825_DP_INT("vref-impedance", config->vref_impedance);
  62         NAU8825_DP_INT("micbias-voltage", config->micbias_voltage);
  63         NAU8825_DP_INT("sar-hysteresis", config->sar_hysteresis);
  64         NAU8825_DP_INT("sar-voltage", config->sar_voltage);
  65         NAU8825_DP_INT("sar-compare-time", config->sar_compare_time);
  66         NAU8825_DP_INT("sar-sampling-time", config->sar_sampling_time);
  67         NAU8825_DP_INT("short-key-debounce", config->short_key_debounce);
  68         NAU8825_DP_INT("jack-insert-debounce", config->jack_insert_debounce);
  69         NAU8825_DP_INT("jack-eject-debounce", config->jack_eject_debounce);
  70         NAU8825_DP_INT("sar-threshold-num", config->sar_threshold_num);
  71         NAU8825_DP_INT("adcout-drive-strong", config->adcout_ds ? 1 : 0);
  72         acpi_dp_add_integer_array(dp, "nuvoton,sar-threshold",
  73                           config->sar_threshold, config->sar_threshold_num);
  74         acpi_dp_write(dp);
  75
  76         acpigen_pop_len(); /* Device */
  77         acpigen_pop_len(); /* Scope */
  78
  79         printk(BIOS_INFO, "%s: %s address 0%xh irq %d\n",
  80                acpi_device_path(dev), dev->chip_ops->name,
  81                dev->path.i2c.device, config->irq.pin);
  82 }
  83
  84 static const char *nau8825_acpi_name(const struct device *dev)
  85 {
  86         return NAU8825_ACPI_NAME;
  87 }
  88 #endif
  89
  90 static struct device_operations nau8825_ops = {
  91         .read_resources         = noop_read_resources,
  92         .set_resources          = noop_set_resources,
  93 #if CONFIG(HAVE_ACPI_TABLES)
  94         .acpi_name              = nau8825_acpi_name,
  95         .acpi_fill_ssdt         = nau8825_fill_ssdt,
  96 #endif
  97 };
  98
  99 static void nau8825_enable(struct device *dev)
 100 {
 101         dev->ops = &nau8825_ops;
 102 }
 103
 104 struct chip_operations drivers_i2c_nau8825_ops = {
 105         .name = "Nuvoton NAU8825 Codec",
 106         .enable_dev = nau8825_enable
 107 };