src/drivers/i2c/max98927/max98927.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 "chip.h"
   9
  10 #define MAX98927_ACPI_NAME      "MAXI"
  11 #define MAX98927_ACPI_HID       "MX98927"
  12
  13 static void max98927_fill_ssdt(const struct device *dev)
  14 {
  15         struct drivers_i2c_max98927_config *config = dev->chip_info;
  16         const char *scope = acpi_device_scope(dev);
  17         struct acpi_i2c i2c = {
  18                 .address = dev->path.i2c.device,
  19                 .mode_10bit = dev->path.i2c.mode_10bit,
  20                 .speed = config->bus_speed ? : I2C_SPEED_FAST,
  21                 .resource = scope,
  22         };
  23         struct acpi_dp *dp;
  24
  25         if (!scope)
  26                 return;
  27
  28         /* Device */
  29         acpigen_write_scope(scope);
  30         acpigen_write_device(acpi_device_name(dev));
  31         acpigen_write_name_string("_HID", MAX98927_ACPI_HID);
  32         acpigen_write_name_integer("_UID", config->uid);
  33         if (config->desc)
  34                 acpigen_write_name_string("_DDN", config->desc);
  35         acpigen_write_STA(acpi_device_status(dev));
  36
  37         /* Resources */
  38         acpigen_write_name("_CRS");
  39         acpigen_write_resourcetemplate_header();
  40         acpi_device_write_i2c(&i2c);
  41         acpigen_write_resourcetemplate_footer();
  42
  43         /* Device Properties */
  44         dp = acpi_dp_new_table("_DSD");
  45
  46         acpi_dp_add_integer(dp, "interleave_mode", config->interleave_mode);
  47         acpi_dp_add_integer(dp, "vmon-slot-no", config->vmon_slot_no);
  48         acpi_dp_add_integer(dp, "imon-slot-no", config->imon_slot_no);
  49
  50         acpi_dp_write(dp);
  51
  52         acpigen_pop_len(); /* Device */
  53         acpigen_pop_len(); /* Scope */
  54
  55         printk(BIOS_INFO, "%s: %s address 0%xh\n", acpi_device_path(dev),
  56                         dev->chip_ops->name, dev->path.i2c.device);
  57 }
  58
  59 static const char *max98927_acpi_name(const struct device *dev)
  60 {
  61         struct drivers_i2c_max98927_config *config = dev->chip_info;
  62
  63         if (config->name)
  64                 return config->name;
  65
  66         return MAX98927_ACPI_NAME;
  67 }
  68
  69 static struct device_operations max98927_ops = {
  70         .read_resources         = noop_read_resources,
  71         .set_resources          = noop_set_resources,
  72         .acpi_name              = max98927_acpi_name,
  73         .acpi_fill_ssdt         = max98927_fill_ssdt,
  74 };
  75
  76 static void max98927_enable(struct device *dev)
  77 {
  78         struct drivers_i2c_max98927_config *config = dev->chip_info;
  79
  80         dev->ops = &max98927_ops;
  81
  82         if (config && config->desc) {
  83                 dev->name = config->desc;
  84         }
  85 }
  86
  87 struct chip_operations drivers_i2c_max98927_ops = {
  88         .name = "Maxim MAX98927 Codec",
  89         .enable_dev = max98927_enable
  90 };