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
17static 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, ar->hw_params.led_pin, ar->leds.gpio_state_pin);
31
32out:
33	mutex_unlock(&ar->conf_mutex);
34
35	return 0;
36}
37
38int 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
56int 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.name = ar->leds.label;
68	ar->leds.wifi_led.default_state = LEDS_GPIO_DEFSTATE_KEEP;
69
70	ar->leds.cdev.name = ar->leds.label;
71	ar->leds.cdev.brightness_set_blocking = ath10k_leds_set_brightness_blocking;
72	ar->leds.cdev.default_trigger = ar->leds.wifi_led.default_trigger;
73
74	ret = led_classdev_register(wiphy_dev(ar->hw->wiphy), &ar->leds.cdev);
75	if (ret)
76		return ret;
77
78	return 0;
79}
80
81void ath10k_leds_unregister(struct ath10k *ar)
82{
83	if (ar->hw_params.led_pin == 0)
84		/* leds not supported */
85		return;
86
87	led_classdev_unregister(&ar->leds.cdev);
88}
89