drivers/platform/x86/intel/int3472/led.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Author: Hans de Goede <hdegoede@redhat.com> */
   3
   4 #include <linux/acpi.h>
   5 #include <linux/gpio/consumer.h>
   6 #include <linux/leds.h>
   7 #include "common.h"
   8
   9 static int int3472_pled_set(struct led_classdev *led_cdev,
  10                                      enum led_brightness brightness)
  11 {
  12         struct int3472_discrete_device *int3472 =
  13                 container_of(led_cdev, struct int3472_discrete_device, pled.classdev);
  14
  15         gpiod_set_value_cansleep(int3472->pled.gpio, brightness);
  16         return 0;
  17 }
  18
  19 int skl_int3472_register_pled(struct int3472_discrete_device *int3472, struct gpio_desc *gpio)
  20 {
  21         char *p;
  22         int ret;
  23
  24         if (int3472->pled.classdev.dev)
  25                 return -EBUSY;
  26
  27         int3472->pled.gpio = gpio;
  28
  29         /* Generate the name, replacing the ':' in the ACPI devname with '_' */
  30         snprintf(int3472->pled.name, sizeof(int3472->pled.name),
  31                  "%s::privacy_led", acpi_dev_name(int3472->sensor));
  32         p = strchr(int3472->pled.name, ':');
  33         if (p)
  34                 *p = '_';
  35
  36         int3472->pled.classdev.name = int3472->pled.name;
  37         int3472->pled.classdev.max_brightness = 1;
  38         int3472->pled.classdev.brightness_set_blocking = int3472_pled_set;
  39
  40         ret = led_classdev_register(int3472->dev, &int3472->pled.classdev);
  41         if (ret)
  42                 return ret;
  43
  44         int3472->pled.lookup.provider = int3472->pled.name;
  45         int3472->pled.lookup.dev_id = int3472->sensor_name;
  46         int3472->pled.lookup.con_id = "privacy-led";
  47         led_add_lookup(&int3472->pled.lookup);
  48
  49         return 0;
  50 }
  51
  52 void skl_int3472_unregister_pled(struct int3472_discrete_device *int3472)
  53 {
  54         if (IS_ERR_OR_NULL(int3472->pled.classdev.dev))
  55                 return;
  56
  57         led_remove_lookup(&int3472->pled.lookup);
  58         led_classdev_unregister(&int3472->pled.classdev);
  59 }