drivers/net/wireless/ath/ath10k/leds.c

   1 // SPDX-License-Identifier: ISC
   2 /*
   3  * Copyright (c) 2005-2011 Atheros Communications Inc.
   4  * Copyright (c) 2011-2017 Qualcomm Atheros, Inc.
   5  * Copyright (c) 2018 Sebastian Gottschall <s.gottschall@dd-wrt.com>
   6  * Copyright (c) 2018 The Linux Foundation. All rights reserved.
   7  */
   8
   9 #include <linux/leds.h>
  10
  11 #include "core.h"
  12 #include "wmi.h"
  13 #include "wmi-ops.h"
  14
  15 #include "leds.h"
  16
  17 static int ath10k_leds_set_brightness_blocking(struct led_classdev *led_cdev,
  18                                                enum led_brightness brightness)
  19 {
  20         struct ath10k *ar = container_of(led_cdev, struct ath10k,
  21                                          leds.cdev);
  22         struct gpio_led *led = &ar->leds.wifi_led;
  23
  24         mutex_lock(&ar->conf_mutex);
  25
  26         if (ar->state != ATH10K_STATE_ON)
  27                 goto out;
  28
  29         ar->leds.gpio_state_pin = (brightness != LED_OFF) ^ led->active_low;
  30         ath10k_wmi_gpio_output(ar, led->gpio, ar->leds.gpio_state_pin);
  31
  32 out:
  33         mutex_unlock(&ar->conf_mutex);
  34
  35         return 0;
  36 }
  37
  38 int ath10k_leds_start(struct ath10k *ar)
  39 {
  40         if (ar->hw_params.led_pin == 0)
  41                 /* leds not supported */
  42                 return 0;
  43
  44         /* under some circumstances, the gpio pin gets reconfigured
  45          * to default state by the firmware, so we need to
  46          * reconfigure it this behaviour has only ben seen on
  47          * QCA9984 and QCA99XX devices so far
  48          */
  49         ath10k_wmi_gpio_config(ar, ar->hw_params.led_pin, 0,
  50                                WMI_GPIO_PULL_NONE, WMI_GPIO_INTTYPE_DISABLE);
  51         ath10k_wmi_gpio_output(ar, ar->hw_params.led_pin, 1);
  52
  53         return 0;
  54 }
  55
  56 int ath10k_leds_register(struct ath10k *ar)
  57 {
  58         int ret;
  59
  60         if (ar->hw_params.led_pin == 0)
  61                 /* leds not supported */
  62                 return 0;
  63
  64         snprintf(ar->leds.label, sizeof(ar->leds.label), "ath10k-%s",
  65                  wiphy_name(ar->hw->wiphy));
  66         ar->leds.wifi_led.active_low = 1;
  67         ar->leds.wifi_led.gpio = ar->hw_params.led_pin;
  68         ar->leds.wifi_led.name = ar->leds.label;
  69         ar->leds.wifi_led.default_state = LEDS_GPIO_DEFSTATE_KEEP;
  70
  71         ar->leds.cdev.name = ar->leds.label;
  72         ar->leds.cdev.brightness_set_blocking = ath10k_leds_set_brightness_blocking;
  73         ar->leds.cdev.default_trigger = ar->leds.wifi_led.default_trigger;
  74
  75         ret = led_classdev_register(wiphy_dev(ar->hw->wiphy), &ar->leds.cdev);
  76         if (ret)
  77                 return ret;
  78
  79         return 0;
  80 }
  81
  82 void ath10k_leds_unregister(struct ath10k *ar)
  83 {
  84         if (ar->hw_params.led_pin == 0)
  85                 /* leds not supported */
  86                 return;
  87
  88         led_classdev_unregister(&ar->leds.cdev);
  89 }
  90