src/drivers/generic/alc1015/alc1015.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/device.h>
   7 #include <device/path.h>
   8 #include "chip.h"
   9
  10 static void alc1015_fill_ssdt(const struct device *dev)
  11 {
  12         struct drivers_generic_alc1015_config *config = dev->chip_info;
  13         const char *path;
  14         struct acpi_dp *dp;
  15
  16         if (!config)
  17                 return;
  18
  19         const char *scope = acpi_device_scope(dev);
  20         const char *name = acpi_device_name(dev);
  21         if (!scope || !name)
  22                 return;
  23
  24         /* Device */
  25         acpigen_write_scope(scope);
  26         acpigen_write_device(name);
  27
  28         if (config->hid)
  29                 acpigen_write_name_string("_HID", config->hid);
  30         else
  31                 acpigen_write_name_string("_HID", "RTL1015");
  32         acpigen_write_name_integer("_UID", 0);
  33         acpigen_write_name_string("_DDN", dev->chip_ops->name);
  34         acpigen_write_STA(acpi_device_status(dev));
  35
  36         /* Resources */
  37         acpigen_write_name("_CRS");
  38         acpigen_write_resourcetemplate_header();
  39         acpi_device_write_gpio(&config->sdb);
  40         acpigen_write_resourcetemplate_footer();
  41
  42         /* _DSD for devicetree properties */
  43         /* This points to the first pin in the first gpio entry in _CRS */
  44         path = acpi_device_path(dev);
  45         dp = acpi_dp_new_table("_DSD");
  46         acpi_dp_add_gpio(dp, "sdb-gpios", path, 0, 0, config->sdb.active_low);
  47         acpi_dp_write(dp);
  48
  49         acpigen_pop_len(); /* Device */
  50         acpigen_pop_len(); /* Scope */
  51
  52         printk(BIOS_INFO, "%s: %s\n", path, dev->chip_ops->name);
  53 }
  54
  55 static const char *alc1015_acpi_name(const struct device *dev)
  56 {
  57         return "ALCP";
  58 }
  59
  60 static struct device_operations alc1015_ops = {
  61         .read_resources         = noop_read_resources,
  62         .set_resources          = noop_set_resources,
  63         .acpi_name              = alc1015_acpi_name,
  64         .acpi_fill_ssdt         = alc1015_fill_ssdt,
  65 };
  66
  67 static void alc1015_enable(struct device *dev)
  68 {
  69         dev->ops = &alc1015_ops;
  70 }
  71
  72 struct chip_operations drivers_generic_alc1015_ops = {
  73         CHIP_NAME("ASoC RT1015P Amplifier driver")
  74         .enable_dev = alc1015_enable
  75 };