src/drivers/i2c/max98373/max98373.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 MAX98373_ACPI_NAME      "MAXI"
  11 #define MAX98373_ACPI_HID       "MX98373"
  12
  13 static void max98373_fill_ssdt(const struct device *dev)
  14 {
  15         struct drivers_i2c_max98373_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                 printk(BIOS_ERR, "%s: dev not enabled\n", __func__);
  27                 return;
  28         }
  29
  30         /* Device */
  31         acpigen_write_scope(scope);
  32         acpigen_write_device(acpi_device_name(dev));
  33         acpigen_write_name_string("_HID", MAX98373_ACPI_HID);
  34         acpigen_write_name_integer("_UID", config->uid);
  35         if (config->desc)
  36                 acpigen_write_name_string("_DDN", config->desc);
  37         acpigen_write_STA(acpi_device_status(dev));
  38
  39         /* Resources */
  40         acpigen_write_name("_CRS");
  41         acpigen_write_resourcetemplate_header();
  42         acpi_device_write_i2c(&i2c);
  43         acpigen_write_resourcetemplate_footer();
  44
  45         /* Device Properties */
  46         dp = acpi_dp_new_table("_DSD");
  47
  48         if (config->interleave_mode)
  49                 acpi_dp_add_integer(dp, "maxim,interleave_mode",
  50                                 config->interleave_mode);
  51         acpi_dp_add_integer(dp, "maxim,vmon-slot-no", config->vmon_slot_no);
  52         acpi_dp_add_integer(dp, "maxim,imon-slot-no", config->imon_slot_no);
  53
  54         acpi_dp_write(dp);
  55
  56         acpigen_pop_len(); /* Device */
  57         acpigen_pop_len(); /* Scope */
  58
  59         printk(BIOS_INFO, "%s: %s address 0%xh\n", acpi_device_path(dev),
  60                         dev->chip_ops->name, dev->path.i2c.device);
  61 }
  62
  63 static const char *max98373_acpi_name(const struct device *dev)
  64 {
  65         struct drivers_i2c_max98373_config *config = dev->chip_info;
  66
  67         if (config->name)
  68                 return config->name;
  69
  70         return MAX98373_ACPI_NAME;
  71 }
  72
  73 static struct device_operations max98373_ops = {
  74         .read_resources         = noop_read_resources,
  75         .set_resources          = noop_set_resources,
  76         .acpi_name              = max98373_acpi_name,
  77         .acpi_fill_ssdt         = max98373_fill_ssdt,
  78 };
  79
  80 static void max98373_enable(struct device *dev)
  81 {
  82         struct drivers_i2c_max98373_config *config = dev->chip_info;
  83
  84         dev->ops = &max98373_ops;
  85
  86         if (config && config->desc) {
  87                 dev->name = config->desc;
  88         }
  89 }
  90
  91 struct chip_operations drivers_i2c_max98373_ops = {
  92         .name = "Maxim MAX98373 Codec",
  93         .enable_dev = max98373_enable
  94 };