[ARM] 4690/1: PXA: fix CKEN corruption in PXA27x AC97 cold reset code

Fix CKEN register corruption in the PXA27x cold reset code
located in sound/arm/pxa27x-ac97.c. The problem has been
introduced with a pxa_set_cken() function change in linux 2.6.23.
This patch is based on patch 4527/1 that fixes the same problem in
the ASoC PXA-AC97 driver. Additionally a definition for the CKEN
index value is added and applied to both PXA AC97 drivers.

Signed-off-by: Michael Brunner <mibru@gmx.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

include/asm-arm/arch-pxa/pxa-regs.h

@@ -1784,6 +1784,7 @@
 #define CCCR_M_MASK	0x0060		/* Memory Frequency to Run Mode Frequency Multiplier */
 #define CCCR_L_MASK	0x001f		/* Crystal Frequency to Memory Frequency Multiplier */
 
+#define CKEN_AC97CONF   (31)    /* AC97 Controller Configuration */
 #define CKEN_CAMERA	(24)	/* Camera Interface Clock Enable */
 #define CKEN_SSP1	(23)	/* SSP1 Unit Clock Enable */
 #define CKEN_MEMC	(22)	/* Memory Controller Clock Enable */

sound/arm/pxa2xx-ac97.c

@@ -113,9 +113,9 @@ static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
 	gsr_bits = 0;
 #ifdef CONFIG_PXA27x
 	/* PXA27x Developers Manual section 13.5.2.2.1 */
-	pxa_set_cken(1 << 31, 1);
+	pxa_set_cken(CKEN_AC97CONF, 1);
 	udelay(5);
-	pxa_set_cken(1 << 31, 0);
+	pxa_set_cken(CKEN_AC97CONF, 0);
 	GCR = GCR_COLD_RST;
 	udelay(50);
 #else

sound/soc/pxa/pxa2xx-ac97.c

@@ -160,9 +160,9 @@ static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97)
 	gsr_bits = 0;
 #ifdef CONFIG_PXA27x
 	/* PXA27x Developers Manual section 13.5.2.2.1 */
-	pxa_set_cken(31, 1);
+	pxa_set_cken(CKEN_AC97CONF, 1);
 	udelay(5);
-	pxa_set_cken(31, 0);
+	pxa_set_cken(CKEN_AC97CONF, 0);
 	GCR = GCR_COLD_RST;
 	udelay(50);
 #else