[U-Boot] [PATCH V2] MX31: change return value of get_cpu_rev

[Stefano Babic]

Drop warnings in get_cpu_rev and changes the return value
(a u32 instead of char * is returned) of the function
to be coherent with other processors.

Signed-off-by: Stefano Babic <sbabic at denx.de>
CC: Detlev Zundel <dzu at denx.de>
CC: Fabio Estevam <fabio.estevam at freescale.com>
---

Changes:
- commit message
- "unknown" will be printed together with the
	revision register if the value of the register
	cannot be translated.

 arch/arm/cpu/arm1136/mx31/generic.c       |   31 ++++++++++++++++------------
 arch/arm/include/asm/arch-mx31/imx-regs.h |    2 +-
 2 files changed, 19 insertions(+), 14 deletions(-)

diff --git a/arch/arm/cpu/arm1136/mx31/generic.c b/arch/arm/cpu/arm1136/mx31/generic.c
index 18572b9..af6da91 100644
--- a/arch/arm/cpu/arm1136/mx31/generic.c
+++ b/arch/arm/cpu/arm1136/mx31/generic.c
@@ -107,18 +107,18 @@ void mx31_set_pad(enum iomux_pins pin, u32 config)
 }
 
 struct mx3_cpu_type mx31_cpu_type[] = {
-	{ .srev = 0x00,	.v = "1.0"  },
-	{ .srev = 0x10,	.v = "1.1"  },
-	{ .srev = 0x11,	.v = "1.1"  },
-	{ .srev = 0x12,	.v = "1.15" },
-	{ .srev = 0x13,	.v = "1.15" },
-	{ .srev = 0x14,	.v = "1.2"  },
-	{ .srev = 0x15,	.v = "1.2"  },
-	{ .srev = 0x28,	.v = "2.0"  },
-	{ .srev = 0x29,	.v = "2.0"  },
+	{ .srev = 0x00, .v = 0x10 },
+	{ .srev = 0x10, .v = 0x11 },
+	{ .srev = 0x11, .v = 0x11 },
+	{ .srev = 0x12, .v = 0x1F },
+	{ .srev = 0x13, .v = 0x1F },
+	{ .srev = 0x14, .v = 0x12 },
+	{ .srev = 0x15, .v = 0x12 },
+	{ .srev = 0x28, .v = 0x20 },
+	{ .srev = 0x29, .v = 0x20 },
 };
 
-char *get_cpu_rev(void)
+u32 get_cpu_rev(void)
 {
 	u32 i, srev;
 
@@ -129,7 +129,8 @@ char *get_cpu_rev(void)
 	for (i = 0; i < ARRAY_SIZE(mx31_cpu_type); i++)
 		if (srev == mx31_cpu_type[i].srev)
 			return mx31_cpu_type[i].v;
-		return "unknown";
+
+	return srev | 0x8000;
 }
 
 char *get_reset_cause(void)
@@ -161,8 +162,12 @@ char *get_reset_cause(void)
 #if defined(CONFIG_DISPLAY_CPUINFO)
 int print_cpuinfo (void)
 {
-	printf("CPU:   Freescale i.MX31 rev %s at %d MHz.",
-			get_cpu_rev(), mx31_get_mcu_main_clk() / 1000000);
+	u32 srev = get_cpu_rev();
+
+	printf("CPU:   Freescale i.MX31 rev %d.%d %s at %d MHz.",
+			(srev & 0xF0) >> 4, (srev & 0x0F),
+			((srev & 0x8000) ? "unknown" : ""),
+			mx31_get_mcu_main_clk() / 1000000);
 	printf("Reset cause: %s\n", get_reset_cause());
 	return 0;
 }
diff --git a/arch/arm/include/asm/arch-mx31/imx-regs.h b/arch/arm/include/asm/arch-mx31/imx-regs.h
index c830a03..306f966 100644
--- a/arch/arm/include/asm/arch-mx31/imx-regs.h
+++ b/arch/arm/include/asm/arch-mx31/imx-regs.h
@@ -105,7 +105,7 @@ struct iim_regs {
 
 struct mx3_cpu_type {
 	u8 srev;
-	char *v;
+	u32 v;
 };
 
 #define IOMUX_PADNUM_MASK	0x1ff
-- 
1.7.1