linux-kernel - [PATCH 4.6 038/121] ath9k: Add a module parameter to invert LED polarity.

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Date:	Sun,  5 Jun 2016 14:43:10 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, linux-wireless@...r.kernel.org,
	ath9k-devel@....qualcomm.com, ath9k-devel@...ts.ath9k.org,
	Vittorio Gambaletta <linuxbugs@...tgam.net>,
	Kalle Valo <kvalo@....qualcomm.com>
Subject: [PATCH 4.6 038/121] ath9k: Add a module parameter to invert LED polarity.

4.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Vittorio Gambaletta (VittGam) <linux-wireless@...tgam.net>

commit cd84042ce9040ad038e958bc67a46fcfc015c736 upstream.

The LED can be active high instead of active low on some hardware.

Add the led_active_high module parameter. It defaults to -1 to obey
platform data as before.

Setting the parameter to 1 or 0 will force the LED respectively
active high or active low.

Cc: <linux-wireless@...r.kernel.org>
Cc: <ath9k-devel@....qualcomm.com>
Cc: <ath9k-devel@...ts.ath9k.org>
Signed-off-by: Vittorio Gambaletta <linuxbugs@...tgam.net>
Signed-off-by: Kalle Valo <kvalo@....qualcomm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/wireless/ath/ath9k/init.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -49,6 +49,10 @@ int ath9k_led_blink;
 module_param_named(blink, ath9k_led_blink, int, 0444);
 MODULE_PARM_DESC(blink, "Enable LED blink on activity");
 
+static int ath9k_led_active_high = -1;
+module_param_named(led_active_high, ath9k_led_active_high, int, 0444);
+MODULE_PARM_DESC(led_active_high, "Invert LED polarity");
+
 static int ath9k_btcoex_enable;
 module_param_named(btcoex_enable, ath9k_btcoex_enable, int, 0444);
 MODULE_PARM_DESC(btcoex_enable, "Enable wifi-BT coexistence");
@@ -600,6 +604,9 @@ static int ath9k_init_softc(u16 devid, s
 	if (ret)
 		return ret;
 
+	if (ath9k_led_active_high != -1)
+		ah->config.led_active_high = ath9k_led_active_high == 1;
+
 	/*
 	 * Enable WLAN/BT RX Antenna diversity only when:
 	 *