Merge tag 'late-exynos-v3-for-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into late/dt

From Kukjin Kim:
This allows that device tree enables platform to setup a runtime IO
mapping for the chip id

* tag 'late-exynos-v3-for-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: dts: Add chip-id controller node on Exynos4/5 SoC
  ARM: EXYNOS: Create virtual I/O mapping for Chip-ID controller using device tree

Signed-off-by: Olof Johansson <olof@lixom.net>

4 files changed, 40 insertions, 24 deletions

diff --git a/arch/arm/boot/dts/exynos4.dtsi b/arch/arm/boot/dts/exynos4.dtsi
index b8771c5cb2a3..7cfbbd3b7732 100644
--- a/arch/arm/boot/dts/exynos4.dtsi
+++ b/arch/arm/boot/dts/exynos4.dtsi
@@ -38,6 +38,11 @@
 		i2c7 = &i2c_7;
 	};
 
+	chipid@10000000 {
+		compatible = "samsung,exynos4210-chipid";
+		reg = <0x10000000 0x100>;
+	};
+
 	pd_mfc: mfc-power-domain@10023C40 {
 		compatible = "samsung,exynos4210-pd";
 		reg = <0x10023C40 0x20>;
diff --git a/arch/arm/boot/dts/exynos5250.dtsi b/arch/arm/boot/dts/exynos5250.dtsi
index af66e6b7bc77..53c37f0b763f 100644
--- a/arch/arm/boot/dts/exynos5250.dtsi
+++ b/arch/arm/boot/dts/exynos5250.dtsi
@@ -51,6 +51,11 @@
 		pinctrl3 = &pinctrl_3;
 	};
 
+	chipid@10000000 {
+		compatible = "samsung,exynos4210-chipid";
+		reg = <0x10000000 0x100>;
+	};
+
 	pd_gsc: gsc-power-domain@0x10044000 {
 		compatible = "samsung,exynos4210-pd";
 		reg = <0x10044000 0x20>;
diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index d3efd6768ff8..3f945cf92c0f 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -119,17 +119,6 @@ static struct map_desc exynos_iodesc[] __initdata = {
 	},
 };
 
-#ifdef CONFIG_ARCH_EXYNOS5
-static struct map_desc exynos5440_iodesc[] __initdata = {
-	{
-		.virtual	= (unsigned long)S5P_VA_CHIPID,
-		.pfn		= __phys_to_pfn(EXYNOS5440_PA_CHIPID),
-		.length		= SZ_4K,
-		.type		= MT_DEVICE,
-	},
-};
-#endif
-
 static struct map_desc exynos4_iodesc[] __initdata = {
 	{
 		.virtual	= (unsigned long)S3C_VA_SYS,
@@ -320,6 +309,31 @@ void __init exynos_init_late(void)
 	exynos_pm_late_initcall();
 }
 
+#ifdef CONFIG_OF
+int __init exynos_fdt_map_chipid(unsigned long node, const char *uname,
+					int depth, void *data)
+{
+	struct map_desc iodesc;
+	__be32 *reg;
+	unsigned long len;
+
+	if (!of_flat_dt_is_compatible(node, "samsung,exynos4210-chipid") &&
+		!of_flat_dt_is_compatible(node, "samsung,exynos5440-clock"))
+		return 0;
+
+	reg = of_get_flat_dt_prop(node, "reg", &len);
+	if (reg == NULL || len != (sizeof(unsigned long) * 2))
+		return 0;
+
+	iodesc.pfn = __phys_to_pfn(be32_to_cpu(reg[0]));
+	iodesc.length = be32_to_cpu(reg[1]) - 1;
+	iodesc.virtual = (unsigned long)S5P_VA_CHIPID;
+	iodesc.type = MT_DEVICE;
+	iotable_init(&iodesc, 1);
+	return 1;
+}
+#endif
+
 /*
  * exynos_map_io
  *
@@ -328,19 +342,12 @@ void __init exynos_init_late(void)
 
 void __init exynos_init_io(struct map_desc *mach_desc, int size)
 {
-	struct map_desc *iodesc = exynos_iodesc;
-	int iodesc_sz = ARRAY_SIZE(exynos_iodesc);
-#if defined(CONFIG_OF) && defined(CONFIG_ARCH_EXYNOS5)
-	unsigned long root = of_get_flat_dt_root();
-
-	/* initialize the io descriptors we need for initialization */
-	if (of_flat_dt_is_compatible(root, "samsung,exynos5440")) {
-		iodesc = exynos5440_iodesc;
-		iodesc_sz = ARRAY_SIZE(exynos5440_iodesc);
-	}
+#ifdef CONFIG_OF
+	if (initial_boot_params)
+		of_scan_flat_dt(exynos_fdt_map_chipid, NULL);
+	else
 #endif
-
-	iotable_init(iodesc, iodesc_sz);
+		iotable_init(exynos_iodesc, ARRAY_SIZE(exynos_iodesc));
 
 	if (mach_desc)
 		iotable_init(mach_desc, size);
diff --git a/arch/arm/mach-exynos/include/mach/map.h b/arch/arm/mach-exynos/include/mach/map.h
index 7f99b7b187d6..be7abc7ceb67 100644
--- a/arch/arm/mach-exynos/include/mach/map.h
+++ b/arch/arm/mach-exynos/include/mach/map.h
@@ -53,7 +53,6 @@
 #define EXYNOS4_PA_ONENAND_DMA		0x0C600000
 
 #define EXYNOS_PA_CHIPID		0x10000000
-#define EXYNOS5440_PA_CHIPID		0x00160000
 
 #define EXYNOS4_PA_SYSCON		0x10010000
 #define EXYNOS5_PA_SYSCON		0x10050100