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>

4 files changed, 25 insertions, 13 deletions

diff --git a/arch/arm/mach-mx5/clock-mx51-mx53.c b/arch/arm/mach-mx5/clock-mx51-mx53.c
index fdbc05ed551..6b89c1bf4eb 100644
--- a/arch/arm/mach-mx5/clock-mx51-mx53.c
+++ b/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);
diff --git a/arch/arm/mach-mx5/cpu.c b/arch/arm/mach-mx5/cpu.c
index 472bdfab2e5..86f87da59c6 100644
--- a/arch/arm/mach-mx5/cpu.c
+++ b/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;
diff --git a/arch/arm/plat-mxc/include/mach/common.h b/arch/arm/plat-mxc/include/mach/common.h
index a22ebe11a60..bfa1ffca5d7 100644
--- a/arch/arm/plat-mxc/include/mach/common.h
+++ b/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
diff --git a/arch/arm/plat-mxc/include/mach/mx53.h b/arch/arm/plat-mxc/include/mach/mx53.h
index ace17864575..9d2a1ef84de 100644
--- a/arch/arm/plat-mxc/include/mach/mx53.h
+++ b/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__ */