diff --git a/arch/arm/mach-imx/clock-imx27.c b/arch/arm/mach-imx/clock-imx27.c
index 98a25bada783..2202b88667b5 100644
--- a/arch/arm/mach-imx/clock-imx27.c
+++ b/arch/arm/mach-imx/clock-imx27.c
@@ -125,7 +125,7 @@ static int clk_cpu_set_parent(struct clk *clk, struct clk *parent)
 	if (clk->parent == parent)
 		return 0;
 
-	if (mx27_revision() >= CHIP_REV_2_0) {
+	if (mx27_revision() >= IMX_CHIP_REVISION_2_0) {
 		if (parent == &mpll_main1_clk) {
 			cscr |= CCM_CSCR_ARM_SRC;
 		} else {
@@ -174,7 +174,7 @@ static int set_rate_cpu(struct clk *clk, unsigned long rate)
 	div--;
 
 	reg = __raw_readl(CCM_CSCR);
-	if (mx27_revision() >= CHIP_REV_2_0) {
+	if (mx27_revision() >= IMX_CHIP_REVISION_2_0) {
 		reg &= ~(3 << 12);
 		reg |= div << 12;
 		reg &= ~(CCM_CSCR_FPM | CCM_CSCR_SPEN);
@@ -244,7 +244,7 @@ static unsigned long get_rate_ssix(struct clk *clk, unsigned long pdf)
 
 	parent_rate = clk_get_rate(clk->parent);
 
-	if (mx27_revision() >= CHIP_REV_2_0)
+	if (mx27_revision() >= IMX_CHIP_REVISION_2_0)
 		pdf += 4;  /* MX27 TO2+ */
 	else
 		pdf = (pdf < 2) ? 124UL : pdf;  /* MX21 & MX27 TO1 */
@@ -269,7 +269,7 @@ static unsigned long get_rate_nfc(struct clk *clk)
 
 	parent_rate = clk_get_rate(clk->parent);
 
-	if (mx27_revision() >= CHIP_REV_2_0)
+	if (mx27_revision() >= IMX_CHIP_REVISION_2_0)
 		nfc_pdf = (__raw_readl(CCM_PCDR0) >> 6) & 0xf;
 	else
 		nfc_pdf = (__raw_readl(CCM_PCDR0) >> 12) & 0xf;
@@ -284,7 +284,7 @@ static unsigned long get_rate_vpu(struct clk *clk)
 
 	parent_rate = clk_get_rate(clk->parent);
 
-	if (mx27_revision() >= CHIP_REV_2_0) {
+	if (mx27_revision() >= IMX_CHIP_REVISION_2_0) {
 		vpu_pdf = (__raw_readl(CCM_PCDR0) >> 10) & 0x3f;
 		vpu_pdf += 4;
 	} else {
@@ -347,7 +347,7 @@ static unsigned long get_rate_mpll_main(struct clk *clk)
 	 * clk->id == 0: arm clock source path 1 which is from 2 * MPLL / 2
 	 * clk->id == 1: arm clock source path 2 which is from 2 * MPLL / 3
 	 */
-	if (mx27_revision() >= CHIP_REV_2_0 && clk->id == 1)
+	if (mx27_revision() >= IMX_CHIP_REVISION_2_0 && clk->id == 1)
 		return 2UL * parent_rate / 3UL;
 
 	return parent_rate;
@@ -365,7 +365,7 @@ static unsigned long get_rate_spll(struct clk *clk)
 	/* On TO2 we have to write the value back. Otherwise we
 	 * read 0 from this register the next time.
 	 */
-	if (mx27_revision() >= CHIP_REV_2_0)
+	if (mx27_revision() >= IMX_CHIP_REVISION_2_0)
 		__raw_writel(reg, CCM_SPCTL0);
 
 	return mxc_decode_pll(reg, rate);
@@ -376,7 +376,7 @@ static unsigned long get_rate_cpu(struct clk *clk)
 	u32 div;
 	unsigned long rate;
 
-	if (mx27_revision() >= CHIP_REV_2_0)
+	if (mx27_revision() >= IMX_CHIP_REVISION_2_0)
 		div = (__raw_readl(CCM_CSCR) >> 12) & 0x3;
 	else
 		div = (__raw_readl(CCM_CSCR) >> 13) & 0x7;
@@ -389,7 +389,7 @@ static unsigned long get_rate_ahb(struct clk *clk)
 {
 	unsigned long rate, bclk_pdf;
 
-	if (mx27_revision() >= CHIP_REV_2_0)
+	if (mx27_revision() >= IMX_CHIP_REVISION_2_0)
 		bclk_pdf = (__raw_readl(CCM_CSCR) >> 8) & 0x3;
 	else
 		bclk_pdf = (__raw_readl(CCM_CSCR) >> 9) & 0xf;
@@ -402,7 +402,7 @@ static unsigned long get_rate_ipg(struct clk *clk)
 {
 	unsigned long rate, ipg_pdf;
 
-	if (mx27_revision() >= CHIP_REV_2_0)
+	if (mx27_revision() >= IMX_CHIP_REVISION_2_0)
 		return clk_get_rate(clk->parent);
 	else
 		ipg_pdf = (__raw_readl(CCM_CSCR) >> 8) & 1;
@@ -683,7 +683,7 @@ static void __init to2_adjust_clocks(void)
 {
 	unsigned long cscr = __raw_readl(CCM_CSCR);
 
-	if (mx27_revision() >= CHIP_REV_2_0) {
+	if (mx27_revision() >= IMX_CHIP_REVISION_2_0) {
 		if (cscr & CCM_CSCR_ARM_SRC)
 			cpu_clk.parent = &mpll_main1_clk;
 
diff --git a/arch/arm/mach-imx/cpu-imx27.c b/arch/arm/mach-imx/cpu-imx27.c
index d8d3b2d84dc5..3b117be37bd2 100644
--- a/arch/arm/mach-imx/cpu-imx27.c
+++ b/arch/arm/mach-imx/cpu-imx27.c
@@ -42,7 +42,19 @@ static void query_silicon_parameter(void)
 	val = __raw_readl(MX27_IO_ADDRESS(MX27_SYSCTRL_BASE_ADDR
 				+ SYS_CHIP_ID));
 
-	cpu_silicon_rev = (int)(val >> 28);
+	switch (val >> 28) {
+	case 0:
+		cpu_silicon_rev = IMX_CHIP_REVISION_1_0;
+		break;
+	case 1:
+		cpu_silicon_rev = IMX_CHIP_REVISION_2_0;
+		break;
+	case 2:
+		cpu_silicon_rev = IMX_CHIP_REVISION_2_1;
+		break;
+	default:
+		cpu_silicon_rev = IMX_CHIP_REVISION_UNKNOWN;
+	}
 	cpu_partnumber = (int)((val >> 12) & 0xFFFF);
 }
 
diff --git a/arch/arm/mach-mx3/clock-imx31.c b/arch/arm/mach-mx3/clock-imx31.c
index 109e98f323e0..7cf6d29f376b 100644
--- a/arch/arm/mach-mx3/clock-imx31.c
+++ b/arch/arm/mach-mx3/clock-imx31.c
@@ -615,7 +615,7 @@ int __init mx31_clocks_init(unsigned long fref)
 
 	mx31_read_cpu_rev();
 
-	if (mx31_revision() >= MX31_CHIP_REV_2_0) {
+	if (mx31_revision() >= IMX_CHIP_REVISION_2_0) {
 		reg = __raw_readl(MXC_CCM_PMCR1);
 		/* No PLL restart on DVFS switch; enable auto EMI handshake */
 		reg |= MXC_CCM_PMCR1_PLLRDIS | MXC_CCM_PMCR1_EMIRQ_EN;
diff --git a/arch/arm/mach-mx3/cpu.c b/arch/arm/mach-mx3/cpu.c
index d00a75457812..d1d339576fdf 100644
--- a/arch/arm/mach-mx3/cpu.c
+++ b/arch/arm/mach-mx3/cpu.c
@@ -25,15 +25,15 @@ struct mx3_cpu_type {
 };
 
 static struct mx3_cpu_type mx31_cpu_type[] __initdata = {
-	{ .srev = 0x00, .name = "i.MX31(L)", .v = "1.0",  .rev = MX3x_CHIP_REV_1_0 },
-	{ .srev = 0x10, .name = "i.MX31",    .v = "1.1",  .rev = MX3x_CHIP_REV_1_1 },
-	{ .srev = 0x11, .name = "i.MX31L",   .v = "1.1",  .rev = MX3x_CHIP_REV_1_1 },
-	{ .srev = 0x12, .name = "i.MX31",    .v = "1.15", .rev = MX3x_CHIP_REV_1_1 },
-	{ .srev = 0x13, .name = "i.MX31L",   .v = "1.15", .rev = MX3x_CHIP_REV_1_1 },
-	{ .srev = 0x14, .name = "i.MX31",    .v = "1.2",  .rev = MX3x_CHIP_REV_1_2 },
-	{ .srev = 0x15, .name = "i.MX31L",   .v = "1.2",  .rev = MX3x_CHIP_REV_1_2 },
-	{ .srev = 0x28, .name = "i.MX31",    .v = "2.0",  .rev = MX3x_CHIP_REV_2_0 },
-	{ .srev = 0x29, .name = "i.MX31L",   .v = "2.0",  .rev = MX3x_CHIP_REV_2_0 },
+	{ .srev = 0x00, .name = "i.MX31(L)", .v = "1.0",  .rev = IMX_CHIP_REVISION_1_0	},
+	{ .srev = 0x10, .name = "i.MX31",    .v = "1.1",  .rev = IMX_CHIP_REVISION_1_1	},
+	{ .srev = 0x11, .name = "i.MX31L",   .v = "1.1",  .rev = IMX_CHIP_REVISION_1_1	},
+	{ .srev = 0x12, .name = "i.MX31",    .v = "1.15", .rev = IMX_CHIP_REVISION_1_1	},
+	{ .srev = 0x13, .name = "i.MX31L",   .v = "1.15", .rev = IMX_CHIP_REVISION_1_1	},
+	{ .srev = 0x14, .name = "i.MX31",    .v = "1.2",  .rev = IMX_CHIP_REVISION_1_2	},
+	{ .srev = 0x15, .name = "i.MX31L",   .v = "1.2",  .rev = IMX_CHIP_REVISION_1_2	},
+	{ .srev = 0x28, .name = "i.MX31",    .v = "2.0",  .rev = IMX_CHIP_REVISION_2_0	},
+	{ .srev = 0x29, .name = "i.MX31L",   .v = "2.0",  .rev = IMX_CHIP_REVISION_2_0	},
 };
 
 void __init mx31_read_cpu_rev(void)
@@ -53,6 +53,8 @@ void __init mx31_read_cpu_rev(void)
 			return;
 		}
 
+	mx31_cpu_rev = IMX_CHIP_REVISION_UNKNOWN;
+
 	printk(KERN_WARNING "Unknown CPU identifier. srev = %02x\n", srev);
 }
 
@@ -62,22 +64,25 @@ EXPORT_SYMBOL(mx35_cpu_rev);
 void __init mx35_read_cpu_rev(void)
 {
 	u32 rev;
-	char *srev = "unknown";
+	char *srev;
 
 	rev = __raw_readl(MX35_IO_ADDRESS(MX35_IIM_BASE_ADDR + MXC_IIMSREV));
 	switch (rev) {
 	case 0x00:
-		mx35_cpu_rev = MX3x_CHIP_REV_1_0;
+		mx35_cpu_rev = IMX_CHIP_REVISION_1_0;
 		srev = "1.0";
 		break;
 	case 0x10:
-		mx35_cpu_rev = MX3x_CHIP_REV_2_0;
+		mx35_cpu_rev = IMX_CHIP_REVISION_2_0;
 		srev = "2.0";
 		break;
 	case 0x11:
-		mx35_cpu_rev = MX3x_CHIP_REV_2_1;
+		mx35_cpu_rev = IMX_CHIP_REVISION_2_1;
 		srev = "2.1";
 		break;
+	default:
+		mx35_cpu_rev = IMX_CHIP_REVISION_UNKNOWN;
+		srev = "unknown";
 	}
 
 	printk(KERN_INFO "CPU identified as i.MX35, silicon rev %s\n", srev);
diff --git a/arch/arm/mach-mx5/clock-mx51-mx53.c b/arch/arm/mach-mx5/clock-mx51-mx53.c
index ca4f9d58cfeb..344ee8ef1eef 100644
--- a/arch/arm/mach-mx5/clock-mx51-mx53.c
+++ b/arch/arm/mach-mx5/clock-mx51-mx53.c
@@ -780,6 +780,12 @@ static struct clk ahb_clk = {
 	.round_rate = _clk_ahb_round_rate,
 };
 
+static struct clk iim_clk = {
+	.parent = &ipg_clk,
+	.enable_reg = MXC_CCM_CCGR0,
+	.enable_shift = MXC_CCM_CCGRx_CG15_OFFSET,
+};
+
 /* Main IP interface clock for access to registers */
 static struct clk ipg_clk = {
 	.parent = &ahb_clk,
@@ -1099,6 +1105,7 @@ static struct clk_lookup mx51_lookups[] = {
 	_REGISTER_CLOCK("sdhci-esdhc-imx.0", NULL, esdhc1_clk)
 	_REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_clk)
 	_REGISTER_CLOCK(NULL, "cpu_clk", cpu_clk)
+	_REGISTER_CLOCK(NULL, "iim_clk", iim_clk)
 };
 
 static struct clk_lookup mx53_lookups[] = {
@@ -1107,6 +1114,7 @@ static struct clk_lookup mx53_lookups[] = {
 	_REGISTER_CLOCK("imx-uart.2", NULL, uart3_clk)
 	_REGISTER_CLOCK(NULL, "gpt", gpt_clk)
 	_REGISTER_CLOCK("fec.0", NULL, fec_clk)
+	_REGISTER_CLOCK(NULL, "iim_clk", iim_clk)
 };
 
 static void clk_tree_init(void)
@@ -1147,6 +1155,10 @@ int __init mx51_clocks_init(unsigned long ckil, unsigned long osc,
 	clk_enable(&cpu_clk);
 	clk_enable(&main_bus_clk);
 
+	clk_enable(&iim_clk);
+	mx51_revision();
+	clk_disable(&iim_clk);
+
 	/* set the usboh3_clk parent to pll2_sw_clk */
 	clk_set_parent(&usboh3_clk, &pll2_sw_clk);
 
@@ -1182,6 +1194,10 @@ int __init mx53_clocks_init(unsigned long ckil, unsigned long osc,
 	clk_enable(&cpu_clk);
 	clk_enable(&main_bus_clk);
 
+	clk_enable(&iim_clk);
+	mx53_revision();
+	clk_disable(&iim_clk);
+
 	/* System timer */
 	mxc_timer_init(&gpt_clk, MX53_IO_ADDRESS(MX53_GPT1_BASE_ADDR),
 		MX53_INT_GPT);
diff --git a/arch/arm/mach-mx5/cpu.c b/arch/arm/mach-mx5/cpu.c
index a00d2bc7246a..d40671da4372 100644
--- a/arch/arm/mach-mx5/cpu.c
+++ b/arch/arm/mach-mx5/cpu.c
@@ -20,37 +20,18 @@
 
 static int cpu_silicon_rev = -1;
 
-#define SI_REV 0x48
+#define IIM_SREV 0x24
 
-static void query_silicon_parameter(void)
+static int get_mx51_srev(void)
 {
-	void __iomem *rom = ioremap(MX51_IROM_BASE_ADDR, MX51_IROM_SIZE);
-	u32 rev;
+	void __iomem *iim_base = MX51_IO_ADDRESS(MX51_IIM_BASE_ADDR);
+	u32 rev = readl(iim_base + IIM_SREV) & 0xff;
 
-	if (!rom) {
-		cpu_silicon_rev = -EINVAL;
-		return;
-	}
-
-	rev = readl(rom + SI_REV);
-	switch (rev) {
-	case 0x1:
-		cpu_silicon_rev = MX51_CHIP_REV_1_0;
-		break;
-	case 0x2:
-		cpu_silicon_rev = MX51_CHIP_REV_1_1;
-		break;
-	case 0x10:
-		cpu_silicon_rev = MX51_CHIP_REV_2_0;
-		break;
-	case 0x20:
-		cpu_silicon_rev = MX51_CHIP_REV_3_0;
-		break;
-	default:
-		cpu_silicon_rev = 0;
-	}
-
-	iounmap(rom);
+	if (rev == 0x0)
+		return IMX_CHIP_REVISION_2_0;
+	else if (rev == 0x10)
+		return IMX_CHIP_REVISION_3_0;
+	return 0;
 }
 
 /*
@@ -64,7 +45,7 @@ int mx51_revision(void)
 		return -EINVAL;
 
 	if (cpu_silicon_rev == -1)
-		query_silicon_parameter();
+		cpu_silicon_rev = get_mx51_srev();
 
 	return cpu_silicon_rev;
 }
@@ -82,7 +63,7 @@ static int __init mx51_neon_fixup(void)
 	if (!cpu_is_mx51())
 		return 0;
 
-	if (mx51_revision() < MX51_CHIP_REV_3_0 && (elf_hwcap & HWCAP_NEON)) {
+	if (mx51_revision() < IMX_CHIP_REVISION_3_0 && (elf_hwcap & HWCAP_NEON)) {
 		elf_hwcap &= ~HWCAP_NEON;
 		pr_info("Turning off NEON support, detected broken NEON implementation\n");
 	}
@@ -92,6 +73,18 @@ static int __init mx51_neon_fixup(void)
 late_initcall(mx51_neon_fixup);
 #endif
 
+static int get_mx53_srev(void)
+{
+	void __iomem *iim_base = MX51_IO_ADDRESS(MX53_IIM_BASE_ADDR);
+	u32 rev = readl(iim_base + IIM_SREV) & 0xff;
+
+	if (rev == 0x0)
+		return IMX_CHIP_REVISION_1_0;
+	else if (rev == 0x10)
+		return IMX_CHIP_REVISION_2_0;
+	return 0;
+}
+
 /*
  * Returns:
  *	the silicon revision of the cpu
@@ -103,7 +96,7 @@ int mx53_revision(void)
 		return -EINVAL;
 
 	if (cpu_silicon_rev == -1)
-		query_silicon_parameter();
+		cpu_silicon_rev = get_mx53_srev();
 
 	return cpu_silicon_rev;
 }
diff --git a/arch/arm/mach-mx5/mm.c b/arch/arm/mach-mx5/mm.c
index cbaf282fb818..e57f96858f0d 100644
--- a/arch/arm/mach-mx5/mm.c
+++ b/arch/arm/mach-mx5/mm.c
@@ -68,7 +68,7 @@ void __init mx51_init_irq(void)
 	unsigned long tzic_addr;
 	void __iomem *tzic_virt;
 
-	if (mx51_revision() < MX51_CHIP_REV_2_0)
+	if (mx51_revision() < IMX_CHIP_REVISION_2_0)
 		tzic_addr = MX51_TZIC_BASE_ADDR_TO1;
 	else
 		tzic_addr = MX51_TZIC_BASE_ADDR;
diff --git a/arch/arm/plat-mxc/include/mach/mx27.h b/arch/arm/plat-mxc/include/mach/mx27.h
index eb09ec09dbe5..cbc43ad5ef48 100644
--- a/arch/arm/plat-mxc/include/mach/mx27.h
+++ b/arch/arm/plat-mxc/include/mach/mx27.h
@@ -244,10 +244,6 @@ static inline void mx27_setup_weimcs(size_t cs,
 #define MX27_DMA_REQ_SDHC3	36
 #define MX27_DMA_REQ_NFC	37
 
-/* silicon revisions specific to i.MX27 */
-#define CHIP_REV_1_0		0x00
-#define CHIP_REV_2_0		0x01
-
 #ifndef __ASSEMBLY__
 extern int mx27_revision(void);
 #endif
diff --git a/arch/arm/plat-mxc/include/mach/mx31.h b/arch/arm/plat-mxc/include/mach/mx31.h
index 092323144e2b..79e7fc01bb59 100644
--- a/arch/arm/plat-mxc/include/mach/mx31.h
+++ b/arch/arm/plat-mxc/include/mach/mx31.h
@@ -203,20 +203,4 @@ static inline void mx31_setup_weimcs(size_t cs,
 
 #define MX31_PROD_SIGNATURE		0x1	/* For MX31 */
 
-/* silicon revisions specific to i.MX31 */
-#define MX31_CHIP_REV_1_0		0x10
-#define MX31_CHIP_REV_1_1		0x11
-#define MX31_CHIP_REV_1_2		0x12
-#define MX31_CHIP_REV_1_3		0x13
-#define MX31_CHIP_REV_2_0		0x20
-#define MX31_CHIP_REV_2_1		0x21
-#define MX31_CHIP_REV_2_2		0x22
-#define MX31_CHIP_REV_2_3		0x23
-#define MX31_CHIP_REV_3_0		0x30
-#define MX31_CHIP_REV_3_1		0x31
-#define MX31_CHIP_REV_3_2		0x32
-
-#define MX31_SYSTEM_REV_MIN		MX31_CHIP_REV_1_0
-#define MX31_SYSTEM_REV_NUM		3
-
 #endif /* ifndef __MACH_MX31_H__ */
diff --git a/arch/arm/plat-mxc/include/mach/mx35.h b/arch/arm/plat-mxc/include/mach/mx35.h
index 0fa3f6855349..d13dbfeef08a 100644
--- a/arch/arm/plat-mxc/include/mach/mx35.h
+++ b/arch/arm/plat-mxc/include/mach/mx35.h
@@ -186,7 +186,4 @@
 
 #define MX35_PROD_SIGNATURE		0x1	/* For MX31 */
 
-#define MX35_SYSTEM_REV_MIN		MX3x_CHIP_REV_1_0
-#define MX35_SYSTEM_REV_NUM		3
-
 #endif /* ifndef __MACH_MX35_H__ */
diff --git a/arch/arm/plat-mxc/include/mach/mx3x.h b/arch/arm/plat-mxc/include/mach/mx3x.h
index 8c7f34e737d0..388a407d72d6 100644
--- a/arch/arm/plat-mxc/include/mach/mx3x.h
+++ b/arch/arm/plat-mxc/include/mach/mx3x.h
@@ -184,22 +184,6 @@
 
 #define MX3x_PROD_SIGNATURE		0x1	/* For MX31 */
 
-/* silicon revisions specific to i.MX31 and i.MX35 */
-#define MX3x_CHIP_REV_1_0		0x10
-#define MX3x_CHIP_REV_1_1		0x11
-#define MX3x_CHIP_REV_1_2		0x12
-#define MX3x_CHIP_REV_1_3		0x13
-#define MX3x_CHIP_REV_2_0		0x20
-#define MX3x_CHIP_REV_2_1		0x21
-#define MX3x_CHIP_REV_2_2		0x22
-#define MX3x_CHIP_REV_2_3		0x23
-#define MX3x_CHIP_REV_3_0		0x30
-#define MX3x_CHIP_REV_3_1		0x31
-#define MX3x_CHIP_REV_3_2		0x32
-
-#define MX3x_SYSTEM_REV_MIN		MX3x_CHIP_REV_1_0
-#define MX3x_SYSTEM_REV_NUM		3
-
 /* Mandatory defines used globally */
 
 #if !defined(__ASSEMBLY__) && !defined(__MXC_BOOT_UNCOMPRESS)
diff --git a/arch/arm/plat-mxc/include/mach/mx51.h b/arch/arm/plat-mxc/include/mach/mx51.h
index 636347c3fa88..8fddfef9b4e8 100644
--- a/arch/arm/plat-mxc/include/mach/mx51.h
+++ b/arch/arm/plat-mxc/include/mach/mx51.h
@@ -345,19 +345,6 @@
 #define MX51_MXC_INT_EMI_NFC		101
 #define MX51_MXC_INT_GPU_IDLE		102
 
-/* silicon revisions specific to i.MX51 */
-#define MX51_CHIP_REV_1_0		0x10
-#define MX51_CHIP_REV_1_1		0x11
-#define MX51_CHIP_REV_1_2		0x12
-#define MX51_CHIP_REV_1_3		0x13
-#define MX51_CHIP_REV_2_0		0x20
-#define MX51_CHIP_REV_2_1		0x21
-#define MX51_CHIP_REV_2_2		0x22
-#define MX51_CHIP_REV_2_3		0x23
-#define MX51_CHIP_REV_3_0		0x30
-#define MX51_CHIP_REV_3_1		0x31
-#define MX51_CHIP_REV_3_2		0x32
-
 #if !defined(__ASSEMBLY__) && !defined(__MXC_BOOT_UNCOMPRESS)
 extern int mx51_revision(void);
 #endif
diff --git a/arch/arm/plat-mxc/include/mach/mxc.h b/arch/arm/plat-mxc/include/mach/mxc.h
index 4c17515650b8..4abbdd11d5c6 100644
--- a/arch/arm/plat-mxc/include/mach/mxc.h
+++ b/arch/arm/plat-mxc/include/mach/mxc.h
@@ -36,6 +36,20 @@
 #define MXC_CPU_MX53		53
 #define MXC_CPU_MXC91231	91231
 
+#define IMX_CHIP_REVISION_1_0		0x10
+#define IMX_CHIP_REVISION_1_1		0x11
+#define IMX_CHIP_REVISION_1_2		0x12
+#define IMX_CHIP_REVISION_1_3		0x13
+#define IMX_CHIP_REVISION_2_0		0x20
+#define IMX_CHIP_REVISION_2_1		0x21
+#define IMX_CHIP_REVISION_2_2		0x22
+#define IMX_CHIP_REVISION_2_3		0x23
+#define IMX_CHIP_REVISION_3_0		0x30
+#define IMX_CHIP_REVISION_3_1		0x31
+#define IMX_CHIP_REVISION_3_2		0x32
+#define IMX_CHIP_REVISION_3_3		0x33
+#define IMX_CHIP_REVISION_UNKNOWN	0xff
+
 #ifndef __ASSEMBLY__
 extern unsigned int __mxc_cpu_type;
 #endif