ath9k: Fix LED configuration

On some x86 platforms, the LED gpio is active high
instead of active low. Identify such cards and modify
the GPIO usage to make sure LED works properly.

Cc: Russell Hu <rhu@qca.qualcomm.com>
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

6 files changed, 19 insertions, 5 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index d5a2019921bd..0f6db12967d9 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -931,6 +931,7 @@ void ath_ant_comb_scan(struct ath_softc *sc, struct ath_rx_status *rs);
 #define ATH9K_PCI_AR9565_2ANT     0x0100
 #define ATH9K_PCI_NO_PLL_PWRSAVE  0x0200
 #define ATH9K_PCI_KILLER          0x0400
+#define ATH9K_PCI_LED_ACT_HI      0x0800
 
 /*
  * Default cache line size, in bytes.
diff --git a/drivers/net/wireless/ath/ath9k/gpio.c b/drivers/net/wireless/ath/ath9k/gpio.c
index b1956bf6e01e..2fef7a480fec 100644
--- a/drivers/net/wireless/ath/ath9k/gpio.c
+++ b/drivers/net/wireless/ath/ath9k/gpio.c
@@ -25,7 +25,12 @@ 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));
+	u32 val = (brightness == LED_OFF);
+
+	if (sc->sc_ah->config.led_active_high)
+		val = !val;
+
+	ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, val);
 }
 
 void ath_deinit_leds(struct ath_softc *sc)
@@ -82,7 +87,7 @@ void ath_fill_led_pin(struct ath_softc *sc)
 	ath9k_hw_cfg_output(ah, ah->led_pin, AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 
 	/* LED off, active low */
-	ath9k_hw_set_gpio(ah, ah->led_pin, 1);
+	ath9k_hw_set_gpio(ah, ah->led_pin, (ah->config.led_active_high) ? 0 : 1);
 }
 #endif
 
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 55ee0a5bc6fa..d2c044885aff 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -329,6 +329,7 @@ struct ath9k_ops_config {
 	bool alt_mingainidx;
 	bool no_pll_pwrsave;
 	bool tx_gain_buffalo;
+	bool led_active_high;
 };
 
 enum ath9k_int {
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 41736e5a49e0..39157ca723d6 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -441,6 +441,9 @@ static void ath9k_init_pcoem_platform(struct ath_softc *sc)
 		ah->config.no_pll_pwrsave = true;
 		ath_info(common, "Disable PLL PowerSave\n");
 	}
+
+	if (sc->driver_data & ATH9K_PCI_LED_ACT_HI)
+		ah->config.led_active_high = true;
 }
 
 static void ath9k_eeprom_request_cb(const struct firmware *eeprom_blob,
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index ca71f2fdc276..5a2a8d288487 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -727,7 +727,8 @@ static int ath9k_start(struct ieee80211_hw *hw)
 	if (ah->led_pin >= 0) {
 		ath9k_hw_cfg_output(ah, ah->led_pin,
 				    AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
-		ath9k_hw_set_gpio(ah, ah->led_pin, 0);
+		ath9k_hw_set_gpio(ah, ah->led_pin,
+				  (ah->config.led_active_high) ? 1 : 0);
 	}
 
 	/*
@@ -869,7 +870,8 @@ static void ath9k_stop(struct ieee80211_hw *hw)
 	spin_lock_bh(&sc->sc_pcu_lock);
 
 	if (ah->led_pin >= 0) {
-		ath9k_hw_set_gpio(ah, ah->led_pin, 1);
+		ath9k_hw_set_gpio(ah, ah->led_pin,
+				  (ah->config.led_active_high) ? 0 : 1);
 		ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
 	}
 
diff --git a/drivers/net/wireless/ath/ath9k/pci.c b/drivers/net/wireless/ath/ath9k/pci.c
index e3f60d5c5263..f009b5b57e5e 100644
--- a/drivers/net/wireless/ath/ath9k/pci.c
+++ b/drivers/net/wireless/ath/ath9k/pci.c
@@ -657,7 +657,9 @@ static const struct pci_device_id ath_pci_id_table[] = {
 			 0x0036,
 			 PCI_VENDOR_ID_DELL,
 			 0x020E),
-	  .driver_data = ATH9K_PCI_AR9565_2ANT | ATH9K_PCI_BT_ANT_DIV },
+	  .driver_data = ATH9K_PCI_AR9565_2ANT |
+			 ATH9K_PCI_BT_ANT_DIV |
+			 ATH9K_PCI_LED_ACT_HI},
 
 	/* PCI-E AR9565 (WB335) */
 	{ PCI_VDEVICE(ATHEROS, 0x0036),