src/ec/google/chromeec/mux/conn/conn.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #include <acpi/acpigen.h>
   4 #include <stdio.h>
   5
   6 #include "chip.h"
   7
   8 static const char *conn_acpi_name(const struct device *dev)
   9 {
  10         static char name[5];
  11         snprintf(name, sizeof(name), "CON%1X", dev->path.generic.id);
  12         return name;
  13 }
  14
  15 static void conn_fill_ssdt(const struct device *dev)
  16 {
  17         const struct ec_google_chromeec_mux_conn_config *config = dev->chip_info;
  18         const char *name;
  19         name = acpi_device_name(dev);
  20         if (!name)
  21                 return;
  22
  23         acpigen_write_scope(acpi_device_scope(dev));
  24         acpigen_write_device(name);
  25
  26         acpigen_write_name_integer("_ADR", dev->path.generic.id);
  27
  28         if (config) {
  29                 struct acpi_dp *dsd = acpi_dp_new_table("_DSD");
  30
  31                 if (config->mode_switch)
  32                         acpi_dp_add_integer(dsd, "mode-switch", 1);
  33                 if (config->retimer_switch)
  34                         acpi_dp_add_integer(dsd, "retimer-switch", 1);
  35
  36                 acpi_dp_write(dsd);
  37         }
  38
  39         acpigen_write_device_end();
  40         acpigen_write_scope_end();
  41 }
  42
  43 static struct device_operations conn_dev_ops = {
  44         .read_resources = noop_read_resources,
  45         .set_resources  = noop_set_resources,
  46         .acpi_name      = conn_acpi_name,
  47         .acpi_fill_ssdt = conn_fill_ssdt,
  48 };
  49
  50 static void conn_enable(struct device *dev)
  51 {
  52         dev->ops = &conn_dev_ops;
  53 }
  54
  55 struct chip_operations ec_google_chromeec_mux_conn_ops = {
  56         .name = "CrosEC Type C Mux device",
  57         .enable_dev     = conn_enable,
  58 };