openwrtv4/package/kernel/mac80211/patches/530-ath9k_extra_leds.patch

--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -557,6 +557,9 @@ struct ath9k_wow_pattern {
 void ath_init_leds(struct ath_softc *sc);
 void ath_deinit_leds(struct ath_softc *sc);
 void ath_fill_led_pin(struct ath_softc *sc);
+int ath_create_gpio_led(struct ath_softc *sc, int gpio, const char *name,
+                        const char *trigger, bool active_low);
+
 #else
 static inline void ath_init_leds(struct ath_softc *sc)
 {
@@ -732,6 +735,13 @@ enum spectral_mode {
 	SPECTRAL_CHANSCAN,
 };
 
+struct ath_led {
+	struct list_head list;
+	struct ath_softc *sc;
+	const struct gpio_led *gpio;
+	struct led_classdev cdev;
+};
+
 struct ath_softc {
 	struct ieee80211_hw *hw;
 	struct device *dev;
@@ -774,9 +784,8 @@ struct ath_softc {
 	struct ieee80211_supported_band sbands[IEEE80211_NUM_BANDS];
 
 #ifdef CPTCFG_MAC80211_LEDS
-	bool led_registered;
-	char led_name[32];
-	struct led_classdev led_cdev;
+	const char *led_default_trigger;
+	struct list_head leds;
 #endif
 
 	struct ath9k_hw_cal_data caldata;
--- a/drivers/net/wireless/ath/ath9k/gpio.c
+++ b/drivers/net/wireless/ath/ath9k/gpio.c
@@ -24,40 +24,102 @@
 static void ath_led_brightness(struct led_classdev *led_cdev,
 			       enum led_brightness brightness)
 {
-	struct ath_softc *sc = container_of(led_cdev, struct ath_softc, led_cdev);
-	ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, (brightness == LED_OFF));
+	struct ath_led *led = container_of(led_cdev, struct ath_led, cdev);
+	struct ath_softc *sc = led->sc;
+
+	ath9k_ps_wakeup(sc);
+	ath9k_hw_set_gpio(sc->sc_ah, led->gpio->gpio,
+			  (brightness != LED_OFF) ^ led->gpio->active_low);
+	ath9k_ps_restore(sc);
+}
+
+static int ath_add_led(struct ath_softc *sc, struct ath_led *led)
+{
+	const struct gpio_led *gpio = led->gpio;
+	int ret;
+
+	led->cdev.name = gpio->name;
+	led->cdev.default_trigger = gpio->default_trigger;
+	led->cdev.brightness_set = ath_led_brightness;
+
+	ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &led->cdev);
+	if (ret < 0)
+		return ret;
+
+	led->sc = sc;
+	list_add(&led->list, &sc->leds);
+
+	/* Configure gpio for output */
+	ath9k_hw_cfg_output(sc->sc_ah, gpio->gpio,
+			    AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
+
+	/* LED off */
+	ath9k_hw_set_gpio(sc->sc_ah, gpio->gpio, gpio->active_low);
+
+	return 0;
+}
+
+int ath_create_gpio_led(struct ath_softc *sc, int gpio_num, const char *name,
+			const char *trigger, bool active_low)
+{
+	struct ath_led *led;
+	struct gpio_led *gpio;
+	char *_name;
+	int ret;
+
+	led = kzalloc(sizeof(*led) + sizeof(*gpio) + strlen(name) + 1,
+		      GFP_KERNEL);
+	if (!led)
+		return -ENOMEM;
+
+	led->gpio = gpio = (struct gpio_led *) (led + 1);
+	_name = (char *) (led->gpio + 1);
+
+	strcpy(_name, name);
+	gpio->name = _name;
+	gpio->gpio = gpio_num;
+	gpio->active_low = active_low;
+	gpio->default_trigger = trigger;
+
+	ret = ath_add_led(sc, led);
+	if (unlikely(ret < 0))
+		kfree(led);
+
+	return ret;
 }
 
 void ath_deinit_leds(struct ath_softc *sc)
 {
-	if (!sc->led_registered)
-		return;
+	struct ath_led *led;
 
-	ath_led_brightness(&sc->led_cdev, LED_OFF);
-	led_classdev_unregister(&sc->led_cdev);
+	while (!list_empty(&sc->leds)) {
+		led = list_first_entry(&sc->leds, struct ath_led, list);
+		list_del(&led->list);
+		ath_led_brightness(&led->cdev, LED_OFF);
+		led_classdev_unregister(&led->cdev);
+		kfree(led);
+	}
 }
 
 void ath_init_leds(struct ath_softc *sc)
 {
-	int ret;
+	char led_name[32];
+	const char *trigger;
+
+	INIT_LIST_HEAD(&sc->leds);
 
 	if (AR_SREV_9100(sc->sc_ah))
 		return;
 
-	if (!led_blink)
-		sc->led_cdev.default_trigger =
-			ieee80211_get_radio_led_name(sc->hw);
-
-	snprintf(sc->led_name, sizeof(sc->led_name),
-		"ath9k-%s", wiphy_name(sc->hw->wiphy));
-	sc->led_cdev.name = sc->led_name;
-	sc->led_cdev.brightness_set = ath_led_brightness;
+	snprintf(led_name, sizeof(led_name), "ath9k-%s",
+		 wiphy_name(sc->hw->wiphy));
 
-	ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &sc->led_cdev);
-	if (ret < 0)
-		return;
+	if (led_blink)
+		trigger = sc->led_default_trigger;
+	else
+		trigger = ieee80211_get_radio_led_name(sc->hw);
 
-	sc->led_registered = true;
+	ath_create_gpio_led(sc, sc->sc_ah->led_pin, led_name, trigger, 1);
 }
 
 void ath_fill_led_pin(struct ath_softc *sc)
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -1016,7 +1016,7 @@ int ath9k_init_device(u16 devid, struct 
 
 #ifdef CPTCFG_MAC80211_LEDS
 	/* must be initialized before ieee80211_register_hw */
-	sc->led_cdev.default_trigger = ieee80211_create_tpt_led_trigger(sc->hw,
+	sc->led_default_trigger = ieee80211_create_tpt_led_trigger(sc->hw,
 		IEEE80211_TPT_LEDTRIG_FL_RADIO, ath9k_tpt_blink,
 		ARRAY_SIZE(ath9k_tpt_blink));
 #endif
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -1874,6 +1874,61 @@ static const struct file_operations fops
 	.llseek = default_llseek,
 };
 
+#ifdef CONFIG_MAC80211_LEDS
+
+static ssize_t write_file_gpio_led(struct file *file, const char __user *ubuf,
+				   size_t count, loff_t *ppos)
+{
+	struct ath_softc *sc = file->private_data;
+	char buf[32], *str, *name, *c;
+	ssize_t len;
+	unsigned int gpio;
+	bool active_low = false;
+
+	len = min(count, sizeof(buf) - 1);
+	if (copy_from_user(buf, ubuf, len))
+		return -EFAULT;
+
+	buf[len] = '\0';
+	name = strchr(buf, ',');
+	if (!name)
+		return -EINVAL;
+
+	*(name++) = 0;
+	if (!*name)
+		return -EINVAL;
+
+	c = strchr(name, '\n');
+	if (c)
+		*c = 0;
+
+	str = buf;
+	if (*str == '!') {
+		str++;
+		active_low = true;
+	}
+
+	if (kstrtouint(str, 0, &gpio) < 0)
+		return -EINVAL;
+
+	if (gpio >= sc->sc_ah->caps.num_gpio_pins)
+		return -EINVAL;
+
+	if (ath_create_gpio_led(sc, gpio, name, NULL, active_low) < 0)
+		return -EINVAL;
+
+	return count;
+}
+
+static const struct file_operations fops_gpio_led = {
+	.write = write_file_gpio_led,
+	.open = simple_open,
+	.owner = THIS_MODULE,
+	.llseek = default_llseek,
+};
+
+#endif
+
 
 int ath9k_init_debug(struct ath_hw *ah)
 {
@@ -1897,6 +1952,10 @@ int ath9k_init_debug(struct ath_hw *ah)
 			    &fops_eeprom);
 	debugfs_create_file("chanbw", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
 			    sc, &fops_chanbw);
+#ifdef CONFIG_MAC80211_LEDS
+	debugfs_create_file("gpio_led", S_IWUSR,
+			   sc->debug.debugfs_phy, sc, &fops_gpio_led);
+#endif
 	debugfs_create_file("dma", S_IRUSR, sc->debug.debugfs_phy, sc,
 			    &fops_dma);
 	debugfs_create_file("interrupt", S_IRUSR, sc->debug.debugfs_phy, sc,