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