src/drivers/intel/pmc_mux/mux.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #include <acpi/acpigen.h>
   4 #include <device/device.h>
   5 #include "chip.h"
   6
   7 #define TGL_PMC_MUX_HID "INTC105C"
   8
   9 static const char *mux_acpi_name(const struct device *dev)
  10 {
  11         return "MUX";
  12 }
  13
  14 static void mux_fill_ssdt(const struct device *dev)
  15 {
  16         const char *scope = acpi_device_scope(dev);
  17         const char *name = acpi_device_name(dev);
  18
  19         if (!scope || !name)
  20                 return;
  21
  22         acpigen_write_scope(scope);
  23         acpigen_write_device(name);
  24
  25         acpigen_write_name_string("_HID", TGL_PMC_MUX_HID);
  26         acpigen_write_name_string("_DDN", dev->chip_ops->name);
  27
  28         acpigen_pop_len(); /* Device */
  29         acpigen_pop_len(); /* Scope */
  30 }
  31
  32 static struct device_operations mux_dev_ops = {
  33         .read_resources = noop_read_resources,
  34         .set_resources  = noop_set_resources,
  35         .acpi_name      = mux_acpi_name,
  36         .acpi_fill_ssdt = mux_fill_ssdt,
  37         .scan_bus       = scan_static_bus,
  38 };
  39
  40 static void mux_enable(struct device *dev)
  41 {
  42         dev->ops = &mux_dev_ops;
  43 }
  44
  45 struct chip_operations drivers_intel_pmc_mux_ops = {
  46         .name = "Intel PMC MUX Driver",
  47         .enable_dev     = mux_enable,
  48 };