ath5k: support LEDs on Acer Aspire One netbook

Add vendor ID for Foxconn and use it to set the ath5k LED gpio and
polarity for Acer branded laptops.

base.c:
Changes-licensed-under: 3-Clause-BSD

Reported-by: Maxim Levitsky <maximlevitsky@gmail.com>
Tested-by: Maxim Levitsky <maximlevitsky@gmail.com>
Tested-by: Andreas Mohr <andi@lisas.de>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath5k/base.c

@@ -2596,6 +2596,13 @@ ath5k_init_leds(struct ath5k_softc *sc)
 		sc->led_pin = 1;
 		sc->led_on = 1;  /* active high */
 	}
+	/* Pin 3 on Foxconn chips used in Acer Aspire One (0x105b:e008) */
+	if (pdev->subsystem_vendor == PCI_VENDOR_ID_FOXCONN) {
+		__set_bit(ATH_STAT_LEDSOFT, sc->status);
+		sc->led_pin = 3;
+		sc->led_on = 0;  /* active low */
+	}
+
 	if (!test_bit(ATH_STAT_LEDSOFT, sc->status))
 		goto out;
 

include/linux/pci_ids.h

@@ -834,6 +834,8 @@
 #define PCI_DEVICE_ID_PROMISE_20276	0x5275
 #define PCI_DEVICE_ID_PROMISE_20277	0x7275
 
+#define PCI_VENDOR_ID_FOXCONN		0x105b
+
 #define PCI_VENDOR_ID_UMC		0x1060
 #define PCI_DEVICE_ID_UMC_UM8673F	0x0101
 #define PCI_DEVICE_ID_UMC_UM8886BF	0x673a