ARM: mx53: Print silicon revision on boot

Having the silicon revision to appear on the boot log is a useful information.

MX31, MX35 and MX51 already show the silicon revision on boot.

Add support for displaying such information for MX53 as well.

Tested on a mx53loco board, where it shows:

CPU identified as i.MX53, silicon rev 2.0
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
LAKML-Reference: 1301068367-18937-1-git-send-email-fabio.estevam@freescale.com
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/mach-mx5/clock-mx51-mx53.c

@@ -1563,6 +1563,7 @@ int __init mx53_clocks_init(unsigned long ckil, unsigned long osc,
 	clk_enable(&iim_clk);
 	mx53_revision();
 	clk_disable(&iim_clk);
+	mx53_display_revision();
 
 	/* Set SDHC parents to be PLL2 */
 	clk_set_parent(&esdhc1_clk, &pll2_sw_clk);

arch/arm/mach-mx5/cpu.c

@@ -166,6 +166,29 @@ int mx50_revision(void)
 }
 EXPORT_SYMBOL(mx50_revision);
 
+void mx53_display_revision(void)
+{
+	int rev;
+	char *srev;
+	rev = mx53_revision();
+
+	switch (rev) {
+	case IMX_CHIP_REVISION_1_0:
+		srev = IMX_CHIP_REVISION_1_0_STRING;
+		break;
+	case IMX_CHIP_REVISION_2_0:
+		srev = IMX_CHIP_REVISION_2_0_STRING;
+		break;
+	case IMX_CHIP_REVISION_2_1:
+		srev = IMX_CHIP_REVISION_2_1_STRING;
+		break;
+	default:
+		srev = IMX_CHIP_REVISION_UNKNOWN_STRING;
+	}
+	printk(KERN_INFO "CPU identified as i.MX53, silicon rev %s\n", srev);
+}
+EXPORT_SYMBOL(mx53_display_revision);
+
 static int __init post_cpu_init(void)
 {
 	unsigned int reg;

arch/arm/plat-mxc/include/mach/common.h

@@ -68,4 +68,5 @@ extern void mxc91231_arch_reset(int, const char *);
 extern void mxc91231_prepare_idle(void);
 extern void mx51_efikamx_reset(void);
 extern int mx53_revision(void);
+extern int mx53_display_revision(void);
 #endif

arch/arm/plat-mxc/include/mach/mx53.h

@@ -337,17 +337,4 @@
 #define MX53_INT_GPIO7_LOW	107
 #define MX53_INT_GPIO7_HIGH	108
 
-/* silicon revisions specific to i.MX53 */
-#define MX53_CHIP_REV_1_0		0x10
-#define MX53_CHIP_REV_1_1		0x11
-#define MX53_CHIP_REV_1_2		0x12
-#define MX53_CHIP_REV_1_3		0x13
-#define MX53_CHIP_REV_2_0		0x20
-#define MX53_CHIP_REV_2_1		0x21
-#define MX53_CHIP_REV_2_2		0x22
-#define MX53_CHIP_REV_2_3		0x23
-#define MX53_CHIP_REV_3_0		0x30
-#define MX53_CHIP_REV_3_1		0x31
-#define MX53_CHIP_REV_3_2		0x32
-
 #endif /* ifndef __MACH_MX53_H__ */