ath9k_hw: correct AR_PHY_SPECTRAL_SCAN register offset

We had 0x9912 but AR_PHY_SPECTRAL_SCAN is 0x9910. By using the
0x9912 we were making the hardware unresponsive. This allows us
to move forward with hardware reset on ar9271 on the ath9k_htc
driver.
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/hw.c

@@ -1274,7 +1274,8 @@ static void ath9k_hw_override_ini(struct ath_hw *ah,
 		 * AR9271 1.1
 		 */
 		if (AR_SREV_9271_10(ah)) {
-			val = REG_READ(ah, AR_PHY_SPECTRAL_SCAN) | AR_PHY_SPECTRAL_SCAN_ENABLE;
+			val = REG_READ(ah, AR_PHY_SPECTRAL_SCAN) |
+			      AR_PHY_SPECTRAL_SCAN_ENABLE;
 			REG_WRITE(ah, AR_PHY_SPECTRAL_SCAN, val);
 		}
 		else if (AR_SREV_9271_11(ah))

drivers/net/wireless/ath/ath9k/phy.h

@@ -186,8 +186,20 @@ bool ath9k_hw_init_rf(struct ath_hw *ah,
 #define AR_PHY_PLL_CTL_44_2133  0xeb
 #define AR_PHY_PLL_CTL_40_2133  0xea
 
-#define AR_PHY_SPECTRAL_SCAN		0x9912
-#define AR_PHY_SPECTRAL_SCAN_ENABLE	0x1
+#define AR_PHY_SPECTRAL_SCAN			0x9910  /* AR9280 spectral scan configuration register */
+#define	AR_PHY_SPECTRAL_SCAN_ENABLE		0x1
+#define AR_PHY_SPECTRAL_SCAN_ENA		0x00000001  /* Enable spectral scan, reg 68, bit 0 */
+#define AR_PHY_SPECTRAL_SCAN_ENA_S		0  /* Enable spectral scan, reg 68, bit 0 */
+#define AR_PHY_SPECTRAL_SCAN_ACTIVE		0x00000002  /* Activate spectral scan reg 68, bit 1*/
+#define AR_PHY_SPECTRAL_SCAN_ACTIVE_S		1  /* Activate spectral scan reg 68, bit 1*/
+#define AR_PHY_SPECTRAL_SCAN_FFT_PERIOD		0x000000F0  /* Interval for FFT reports, reg 68, bits 4-7*/
+#define AR_PHY_SPECTRAL_SCAN_FFT_PERIOD_S	4
+#define AR_PHY_SPECTRAL_SCAN_PERIOD		0x0000FF00  /* Interval for FFT reports, reg 68, bits 8-15*/
+#define AR_PHY_SPECTRAL_SCAN_PERIOD_S		8
+#define AR_PHY_SPECTRAL_SCAN_COUNT		0x00FF0000  /* Number of reports, reg 68, bits 16-23*/
+#define AR_PHY_SPECTRAL_SCAN_COUNT_S		16
+#define AR_PHY_SPECTRAL_SCAN_SHORT_REPEAT	0x01000000  /* Short repeat, reg 68, bit 24*/
+#define AR_PHY_SPECTRAL_SCAN_SHORT_REPEAT_S	24  /* Short repeat, reg 68, bit 24*/
 
 #define AR_PHY_RX_DELAY           0x9914
 #define AR_PHY_SEARCH_START_DELAY 0x9918