[PATCH 0/4] ARM: SAMSUNG: Add support CPU ID and Rev. at runtime

[PATCH 0/4] ARM: SAMSUNG: Add support CPU ID and Rev. at runtime

[Kukjin Kim]

This patch adds support handling of CPU ID and varialble silicon revision
at runtime.

[PATCH 1/4] ARM: SAMSUNG: Add support for detecting CPU at runtime
[PATCH 2/4] ARM: S5P64X0: Use cpu_is_s5p64x0() to distinguish cpu at runtime
[PATCH 3/4] ARM: SAMSUNG: Add support for handling of cpu revision
[PATCH 4/4] ARM: EXYNOS4: Use samsung_rev() to distinguish silicon revision

[PATCH 1/4] ARM: SAMSUNG: Add support for detecting CPU at runtime

[Kukjin Kim]

The cpu_is_[name]() can be used to distinguish cpu at runtime.

This patch was originally from Changhwan Youn <chaos.youn@samsung.com>

Acked-by: Changhwan Youn <chaos.youn@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
---
 arch/arm/mach-s3c64xx/cpu.c              |   18 +++----
 arch/arm/plat-s3c24xx/cpu.c              |    8 +--
 arch/arm/plat-s5p/cpu.c                  |   26 ++++-----
 arch/arm/plat-samsung/include/plat/cpu.h |   87 +++++++++++++++++++++++++++++-
 arch/arm/plat-samsung/init.c             |    1 +
 5 files changed, 110 insertions(+), 30 deletions(-)

diff --git a/arch/arm/mach-s3c64xx/cpu.c b/arch/arm/mach-s3c64xx/cpu.c
index 374e45e..7b665f3 100644
--- a/arch/arm/mach-s3c64xx/cpu.c
+++ b/arch/arm/mach-s3c64xx/cpu.c
@@ -43,16 +43,16 @@ static const char name_s3c6410[] = "S3C6410";
 
 static struct cpu_table cpu_ids[] __initdata = {
 	{
-		.idcode		= 0x36400000,
-		.idmask		= 0xfffff000,
+		.idcode		= S3C6400_CPU_ID,
+		.idmask		= S3C64XX_CPU_MASK,
 		.map_io		= s3c6400_map_io,
 		.init_clocks	= s3c6400_init_clocks,
 		.init_uarts	= s3c6400_init_uarts,
 		.init		= s3c6400_init,
 		.name		= name_s3c6400,
 	}, {
-		.idcode		= 0x36410100,
-		.idmask		= 0xffffff00,
+		.idcode		= S3C6410_CPU_ID,
+		.idmask		= S3C64XX_CPU_MASK,
 		.map_io		= s3c6410_map_io,
 		.init_clocks	= s3c6410_init_clocks,
 		.init_uarts	= s3c6410_init_uarts,
@@ -140,22 +140,20 @@ void __init s3c6400_common_init_uarts(struct s3c2410_uartcfg *cfg, int no)
 
 void __init s3c64xx_init_io(struct map_desc *mach_desc, int size)
 {
-	unsigned long idcode;
-
 	/* initialise the io descriptors we need for initialisation */
 	iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc));
 	iotable_init(mach_desc, size);
 
-	idcode = __raw_readl(S3C_VA_SYS + 0x118);
-	if (!idcode) {
+	samsung_cpu_id = __raw_readl(S3C_VA_SYS + 0x118);
+	if (!samsung_cpu_id) {
 		/* S3C6400 has the ID register in a different place,
 		 * and needs a write before it can be read. */
 
 		__raw_writel(0x0, S3C_VA_SYS + 0xA1C);
-		idcode = __raw_readl(S3C_VA_SYS + 0xA1C);
+		samsung_cpu_id = __raw_readl(S3C_VA_SYS + 0xA1C);
 	}
 
-	s3c_init_cpu(idcode, cpu_ids, ARRAY_SIZE(cpu_ids));
+	s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
 }
 
 static __init int s3c64xx_sysdev_init(void)
diff --git a/arch/arm/plat-s3c24xx/cpu.c b/arch/arm/plat-s3c24xx/cpu.c
index c1fc6c6..ead21a4 100644
--- a/arch/arm/plat-s3c24xx/cpu.c
+++ b/arch/arm/plat-s3c24xx/cpu.c
@@ -215,19 +215,17 @@ static void s3c24xx_pm_restart(char mode, const char *cmd)
 
 void __init s3c24xx_init_io(struct map_desc *mach_desc, int size)
 {
-	unsigned long idcode = 0x0;
-
 	/* initialise the io descriptors we need for initialisation */
 	iotable_init(mach_desc, size);
 	iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc));
 
 	if (cpu_architecture() >= CPU_ARCH_ARMv5) {
-		idcode = s3c24xx_read_idcode_v5();
+		samsung_cpu_id = s3c24xx_read_idcode_v5();
 	} else {
-		idcode = s3c24xx_read_idcode_v4();
+		samsung_cpu_id = s3c24xx_read_idcode_v4();
 	}
 
 	arm_pm_restart = s3c24xx_pm_restart;
 
-	s3c_init_cpu(idcode, cpu_ids, ARRAY_SIZE(cpu_ids));
+	s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
 }
diff --git a/arch/arm/plat-s5p/cpu.c b/arch/arm/plat-s5p/cpu.c
index bbc2aa7..3ef6734 100644
--- a/arch/arm/plat-s5p/cpu.c
+++ b/arch/arm/plat-s5p/cpu.c
@@ -36,40 +36,40 @@ static const char name_exynos4210[] = "EXYNOS4210";
 
 static struct cpu_table cpu_ids[] __initdata = {
 	{
-		.idcode		= 0x56440100,
-		.idmask		= 0xfffff000,
+		.idcode		= S5P6440_CPU_ID,
+		.idmask		= S5P64XX_CPU_MASK,
 		.map_io		= s5p6440_map_io,
 		.init_clocks	= s5p6440_init_clocks,
 		.init_uarts	= s5p6440_init_uarts,
 		.init		= s5p64x0_init,
 		.name		= name_s5p6440,
 	}, {
-		.idcode		= 0x36450000,
-		.idmask		= 0xfffff000,
+		.idcode		= S5P6450_CPU_ID,
+		.idmask		= S5P64XX_CPU_MASK,
 		.map_io		= s5p6450_map_io,
 		.init_clocks	= s5p6450_init_clocks,
 		.init_uarts	= s5p6450_init_uarts,
 		.init		= s5p64x0_init,
 		.name		= name_s5p6450,
 	}, {
-		.idcode		= 0x43100000,
-		.idmask		= 0xfffff000,
+		.idcode		= S5PC100_CPU_ID,
+		.idmask		= S5PC100_CPU_MASK,
 		.map_io		= s5pc100_map_io,
 		.init_clocks	= s5pc100_init_clocks,
 		.init_uarts	= s5pc100_init_uarts,
 		.init		= s5pc100_init,
 		.name		= name_s5pc100,
 	}, {
-		.idcode		= 0x43110000,
-		.idmask		= 0xfffff000,
+		.idcode		= S5PV210_CPU_ID,
+		.idmask		= S5PV210_CPU_MASK,
 		.map_io		= s5pv210_map_io,
 		.init_clocks	= s5pv210_init_clocks,
 		.init_uarts	= s5pv210_init_uarts,
 		.init		= s5pv210_init,
 		.name		= name_s5pv210,
 	}, {
-		.idcode		= 0x43210000,
-		.idmask		= 0xfffe0000,
+		.idcode		= EXYNOS4210_CPU_ID,
+		.idmask		= EXYNOS4_CPU_MASK,
 		.map_io		= exynos4_map_io,
 		.init_clocks	= exynos4_init_clocks,
 		.init_uarts	= exynos4_init_uarts,
@@ -114,13 +114,11 @@ static struct map_desc s5p_iodesc[] __initdata = {
 void __init s5p_init_io(struct map_desc *mach_desc,
 			int size, void __iomem *cpuid_addr)
 {
-	unsigned long idcode;
-
 	/* initialize the io descriptors we need for initialization */
 	iotable_init(s5p_iodesc, ARRAY_SIZE(s5p_iodesc));
 	if (mach_desc)
 		iotable_init(mach_desc, size);
 
-	idcode = __raw_readl(cpuid_addr);
-	s3c_init_cpu(idcode, cpu_ids, ARRAY_SIZE(cpu_ids));
+	samsung_cpu_id = __raw_readl(cpuid_addr);
+	s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
 }
diff --git a/arch/arm/plat-samsung/include/plat/cpu.h b/arch/arm/plat-samsung/include/plat/cpu.h
index c0a5741..b762b37 100644
--- a/arch/arm/plat-samsung/include/plat/cpu.h
+++ b/arch/arm/plat-samsung/include/plat/cpu.h
@@ -1,9 +1,12 @@
 /* linux/arch/arm/plat-samsung/include/plat/cpu.h
  *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com/
+ *
  * Copyright (c) 2004-2005 Simtec Electronics
  *	Ben Dooks <ben@simtec.co.uk>
  *
- * Header file for S3C24XX CPU support
+ * Header file for Samsung CPU support
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -15,6 +18,88 @@
 #ifndef __SAMSUNG_PLAT_CPU_H
 #define __SAMSUNG_PLAT_CPU_H
 
+extern unsigned long samsung_cpu_id;
+
+#define S3C24XX_CPU_ID		0x32400000
+#define S3C24XX_CPU_MASK	0xFFF00000
+
+#define S3C6400_CPU_ID		0x36400000
+#define S3C6410_CPU_ID		0x36410000
+#define S3C64XX_CPU_ID		(S3C6400_CPU_ID & S3C6410_CPU_ID)
+#define S3C64XX_CPU_MASK	0x1FF40000
+
+#define S5P6440_CPU_ID		0x56440000
+#define S5P6450_CPU_ID		0x36450000
+#define S5P64XX_CPU_MASK	0x1FF40000
+
+#define S5PC100_CPU_ID		0x43100000
+#define S5PC100_CPU_MASK	0xFFFFF000
+
+#define S5PV210_CPU_ID		0x43110000
+#define S5PV210_CPU_MASK	0xFFFFF000
+
+#define EXYNOS4210_CPU_ID	0x43210000
+#define EXYNOS4_CPU_MASK	0xFFFE0000
+
+#define IS_SAMSUNG_CPU(name, id, mask)		\
+static inline int is_samsung_##name(void)	\
+{						\
+	return ((samsung_cpu_id & mask) == (id & mask));	\
+}
+
+IS_SAMSUNG_CPU(s3c24xx, S3C24XX_CPU_ID, S3C24XX_CPU_MASK)
+IS_SAMSUNG_CPU(s3c64xx, S3C64XX_CPU_ID, S3C64XX_CPU_MASK)
+IS_SAMSUNG_CPU(s5p6440, S5P6440_CPU_ID, S5P64XX_CPU_MASK)
+IS_SAMSUNG_CPU(s5p6450, S5P6450_CPU_ID, S5P64XX_CPU_MASK)
+IS_SAMSUNG_CPU(s5pc100, S5PC100_CPU_ID, S5PC100_CPU_MASK)
+IS_SAMSUNG_CPU(s5pv210, S5PV210_CPU_ID, S5PV210_CPU_MASK)
+IS_SAMSUNG_CPU(exynos4210, EXYNOS4210_CPU_ID, EXYNOS4_CPU_MASK)
+
+#if defined(CONFIG_CPU_S3C2410) || defined(CONFIG_CPU_S3C2412) || \
+    defined(CONFIG_CPU_S3C2416) || defined(CONFIG_CPU_S3C2440) || \
+    defined(CONFIG_CPU_S3C2442) || defined(CONFIG_CPU_S3C244X) || \
+    defined(CONFIG_CPU_S3C2443)
+# define cpu_is_s3c24xx()	is_samsung_s3c24xx()
+#else
+# define cpu_is_s3c24xx()	0
+#endif
+
+#if defined(CONFIG_CPU_S3C6400) || defined(CONFIG_CPU_S3C6410)
+# define cpu_is_s3c64xx()	is_samsung_s3c64xx()
+#else
+# define cpu_is_s3c64xx()	0
+#endif
+
+#if defined(CONFIG_CPU_S5P6440)
+# define cpu_is_s5p6440()	is_samsung_s5p6440()
+#else
+# define cpu_is_s5p6440()	0
+#endif
+
+#if defined(CONFIG_CPU_S5P6450)
+# define cpu_is_s5p6450()	is_samsung_s5p6450()
+#else
+# define cpu_is_s5p6450()	0
+#endif
+
+#if defined(CONFIG_CPU_S5PC100)
+# define cpu_is_s5pc100()	is_samsung_s5pc100()
+#else
+# define cpu_is_s5pc100()	0
+#endif
+
+#if defined(CONFIG_CPU_S5PV210)
+# define cpu_is_s5pv210()	is_samsung_s5pv210()
+#else
+# define cpu_is_s5pv210()	0
+#endif
+
+#if defined(CONFIG_CPU_EXYNOS4210)
+# define cpu_is_exynos4210()	is_samsung_exynos4210()
+#else
+# define cpu_is_exynos4210()	0
+#endif
+
 #define IODESC_ENT(x) { (unsigned long)S3C24XX_VA_##x, __phys_to_pfn(S3C24XX_PA_##x), S3C24XX_SZ_##x, MT_DEVICE }
 
 #ifndef MHZ
diff --git a/arch/arm/plat-samsung/init.c b/arch/arm/plat-samsung/init.c
index 79d10fc..40b1228 100644
--- a/arch/arm/plat-samsung/init.c
+++ b/arch/arm/plat-samsung/init.c
@@ -30,6 +30,7 @@
 #include <plat/regs-serial.h>
 
 static struct cpu_table *cpu;
+unsigned long samsung_cpu_id;
 
 static struct cpu_table * __init s3c_lookup_cpu(unsigned long idcode,
 						struct cpu_table *tab,
-- 
1.7.1

[PATCH 2/4] ARM: S5P64X0: Use cpu_is_s5p64x0() to distinguish cpu at runtime

[Kukjin Kim]

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
---
 arch/arm/mach-s5p64x0/dev-spi.c  |    8 +++-----
 arch/arm/mach-s5p64x0/dma.c      |    7 ++-----
 arch/arm/mach-s5p64x0/gpiolib.c  |    7 ++-----
 arch/arm/mach-s5p64x0/irq-eint.c |    3 ++-
 4 files changed, 9 insertions(+), 16 deletions(-)

diff --git a/arch/arm/mach-s5p64x0/dev-spi.c b/arch/arm/mach-s5p64x0/dev-spi.c
index ac825e8..aa24442 100644
--- a/arch/arm/mach-s5p64x0/dev-spi.c
+++ b/arch/arm/mach-s5p64x0/dev-spi.c
@@ -21,6 +21,7 @@
 #include <mach/regs-clock.h>
 #include <mach/spi-clocks.h>
 
+#include <plat/cpu.h>
 #include <plat/s3c64xx-spi.h>
 #include <plat/gpio-cfg.h>
 
@@ -185,11 +186,8 @@ struct platform_device s5p64x0_device_spi1 = {
 
 void __init s5p64x0_spi_set_info(int cntrlr, int src_clk_nr, int num_cs)
 {
-	unsigned int id;
 	struct s3c64xx_spi_info *pd;
 
-	id = __raw_readl(S5P64X0_SYS_ID) & 0xFF000;
-
 	/* Reject invalid configuration */
 	if (!num_cs || src_clk_nr < 0
 			|| src_clk_nr > S5P64X0_SPI_SRCCLK_SCLK) {
@@ -199,7 +197,7 @@ void __init s5p64x0_spi_set_info(int cntrlr, int src_clk_nr, int num_cs)
 
 	switch (cntrlr) {
 	case 0:
-		if (id == 0x50000)
+		if (cpu_is_s5p6450())
 			pd = &s5p6450_spi0_pdata;
 		else
 			pd = &s5p6440_spi0_pdata;
@@ -207,7 +205,7 @@ void __init s5p64x0_spi_set_info(int cntrlr, int src_clk_nr, int num_cs)
 		s5p64x0_device_spi0.dev.platform_data = pd;
 		break;
 	case 1:
-		if (id == 0x50000)
+		if (cpu_is_s5p6450())
 			pd = &s5p6450_spi1_pdata;
 		else
 			pd = &s5p6440_spi1_pdata;
diff --git a/arch/arm/mach-s5p64x0/dma.c b/arch/arm/mach-s5p64x0/dma.c
index d7ad944..0ac3d59 100644
--- a/arch/arm/mach-s5p64x0/dma.c
+++ b/arch/arm/mach-s5p64x0/dma.c
@@ -28,6 +28,7 @@
 #include <mach/irqs.h>
 #include <mach/regs-clock.h>
 
+#include <plat/cpu.h>
 #include <plat/devs.h>
 #include <plat/s3c-pl330-pdata.h>
 
@@ -133,11 +134,7 @@ static struct platform_device s5p64x0_device_pdma = {
 
 static int __init s5p64x0_dma_init(void)
 {
-	unsigned int id;
-
-	id = __raw_readl(S5P64X0_SYS_ID) & 0xFF000;
-
-	if (id == 0x50000)
+	if (cpu_is_s5p6450())
 		s5p64x0_device_pdma.dev.platform_data = &s5p6450_pdma_pdata;
 	else
 		s5p64x0_device_pdma.dev.platform_data = &s5p6440_pdma_pdata;
diff --git a/arch/arm/mach-s5p64x0/gpiolib.c b/arch/arm/mach-s5p64x0/gpiolib.c
index e7fb3b0..c65684e 100644
--- a/arch/arm/mach-s5p64x0/gpiolib.c
+++ b/arch/arm/mach-s5p64x0/gpiolib.c
@@ -19,6 +19,7 @@
 #include <mach/regs-gpio.h>
 #include <mach/regs-clock.h>
 
+#include <plat/cpu.h>
 #include <plat/gpio-core.h>
 #include <plat/gpio-cfg.h>
 #include <plat/gpio-cfg-helpers.h>
@@ -473,14 +474,10 @@ static void __init s5p64x0_gpio_add_rbank_4bit2(struct s3c_gpio_chip *chip,
 
 static int __init s5p64x0_gpiolib_init(void)
 {
-	unsigned int chipid;
-
-	chipid = __raw_readl(S5P64X0_SYS_ID);
-
 	s5p64x0_gpiolib_set_cfg(s5p64x0_gpio_cfgs,
 				ARRAY_SIZE(s5p64x0_gpio_cfgs));
 
-	if ((chipid & 0xff000) == 0x50000) {
+	if (cpu_is_s5p6450()) {
 		samsung_gpiolib_add_2bit_chips(s5p6450_gpio_2bit,
 					ARRAY_SIZE(s5p6450_gpio_2bit));
 
diff --git a/arch/arm/mach-s5p64x0/irq-eint.c b/arch/arm/mach-s5p64x0/irq-eint.c
index 69ed454..eef01f1 100644
--- a/arch/arm/mach-s5p64x0/irq-eint.c
+++ b/arch/arm/mach-s5p64x0/irq-eint.c
@@ -17,6 +17,7 @@
 #include <linux/irq.h>
 #include <linux/io.h>
 
+#include <plat/cpu.h>
 #include <plat/regs-irqtype.h>
 #include <plat/gpio-cfg.h>
 
@@ -67,7 +68,7 @@ static int s5p64x0_irq_eint_set_type(struct irq_data *data, unsigned int type)
 	__raw_writel(ctrl, S5P64X0_EINT0CON0);
 
 	/* Configure the GPIO pin for 6450 or 6440 based on CPU ID */
-	if (0x50000 == (__raw_readl(S5P64X0_SYS_ID) & 0xFF000))
+	if (cpu_is_s5p6450())
 		s3c_gpio_cfgpin(S5P6450_GPN(offs), S3C_GPIO_SFN(2));
 	else
 		s3c_gpio_cfgpin(S5P6440_GPN(offs), S3C_GPIO_SFN(2));
-- 
1.7.1

[PATCH 3/4] ARM: SAMSUNG: Add support for handling of cpu revision

[Kukjin Kim]

This patch adds plat-samsung/cpu.c for detecting of cpu id and
silicon revision.

This patch was originally from Changhwan Youn <chaos.youn@samsung.com>

Acked-by: Changhwan Youn <chaos.youn@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
---
 arch/arm/mach-s3c64xx/cpu.c              |   10 +----
 arch/arm/plat-s3c24xx/cpu.c              |    1 +
 arch/arm/plat-s5p/cpu.c                  |    4 ++-
 arch/arm/plat-samsung/Makefile           |    2 +-
 arch/arm/plat-samsung/cpu.c              |   58 ++++++++++++++++++++++++++++++
 arch/arm/plat-samsung/include/plat/cpu.h |    4 ++
 arch/arm/plat-samsung/init.c             |    1 -
 7 files changed, 69 insertions(+), 11 deletions(-)
 create mode 100644 arch/arm/plat-samsung/cpu.c

diff --git a/arch/arm/mach-s3c64xx/cpu.c b/arch/arm/mach-s3c64xx/cpu.c
index 7b665f3..6c498f9 100644
--- a/arch/arm/mach-s3c64xx/cpu.c
+++ b/arch/arm/mach-s3c64xx/cpu.c
@@ -144,14 +144,8 @@ void __init s3c64xx_init_io(struct map_desc *mach_desc, int size)
 	iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc));
 	iotable_init(mach_desc, size);
 
-	samsung_cpu_id = __raw_readl(S3C_VA_SYS + 0x118);
-	if (!samsung_cpu_id) {
-		/* S3C6400 has the ID register in a different place,
-		 * and needs a write before it can be read. */
-
-		__raw_writel(0x0, S3C_VA_SYS + 0xA1C);
-		samsung_cpu_id = __raw_readl(S3C_VA_SYS + 0xA1C);
-	}
+	/* detect cpu id */
+	s3c64xx_init_cpu();
 
 	s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
 }
diff --git a/arch/arm/plat-s3c24xx/cpu.c b/arch/arm/plat-s3c24xx/cpu.c
index ead21a4..3c63353 100644
--- a/arch/arm/plat-s3c24xx/cpu.c
+++ b/arch/arm/plat-s3c24xx/cpu.c
@@ -224,6 +224,7 @@ void __init s3c24xx_init_io(struct map_desc *mach_desc, int size)
 	} else {
 		samsung_cpu_id = s3c24xx_read_idcode_v4();
 	}
+	s3c24xx_init_cpu();
 
 	arm_pm_restart = s3c24xx_pm_restart;
 
diff --git a/arch/arm/plat-s5p/cpu.c b/arch/arm/plat-s5p/cpu.c
index 3ef6734..04392c7 100644
--- a/arch/arm/plat-s5p/cpu.c
+++ b/arch/arm/plat-s5p/cpu.c
@@ -119,6 +119,8 @@ void __init s5p_init_io(struct map_desc *mach_desc,
 	if (mach_desc)
 		iotable_init(mach_desc, size);
 
-	samsung_cpu_id = __raw_readl(cpuid_addr);
+	/* detect cpu id and rev. */
+	s5p_init_cpu(cpuid_addr);
+
 	s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
 }
diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile
index 853764b..3de756d 100644
--- a/arch/arm/plat-samsung/Makefile
+++ b/arch/arm/plat-samsung/Makefile
@@ -11,7 +11,7 @@ obj-				:=
 
 # Objects we always build independent of SoC choice
 
-obj-y				+= init.o
+obj-y				+= init.o cpu.o
 obj-$(CONFIG_ARCH_USES_GETTIMEOFFSET)   += time.o
 obj-y				+= clock.o
 obj-y				+= pwm-clock.o
diff --git a/arch/arm/plat-samsung/cpu.c b/arch/arm/plat-samsung/cpu.c
new file mode 100644
index 0000000..fb3b293
--- /dev/null
+++ b/arch/arm/plat-samsung/cpu.c
@@ -0,0 +1,58 @@
+/* linux/arch/arm/plat-samsung/cpu.c
+ *
+ * Copyright (c) 2009-2011 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Samsung CPU Support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+
+#include <asm/system.h>
+
+#include <mach/map.h>
+#include <plat/cpu.h>
+
+unsigned long samsung_cpu_id;
+static unsigned int samsung_cpu_rev;
+
+unsigned int samsung_rev(void)
+{
+	return samsung_cpu_rev;
+}
+EXPORT_SYMBOL(samsung_rev);
+
+void __init s3c24xx_init_cpu(void)
+{
+	/* nothing here yet */
+
+	samsung_cpu_rev = 0;
+}
+
+void __init s3c64xx_init_cpu(void)
+{
+	samsung_cpu_id = __raw_readl(S3C_VA_SYS + 0x118);
+	if (!samsung_cpu_id) {
+		/*
+		 * S3C6400 has the ID register in a different place,
+		 * and needs a write before it can be read.
+		 */
+		__raw_writel(0x0, S3C_VA_SYS + 0xA1C);
+		samsung_cpu_id = __raw_readl(S3C_VA_SYS + 0xA1C);
+	}
+
+	samsung_cpu_rev = 0;
+}
+
+void __init s5p_init_cpu(void __iomem *cpuid_addr)
+{
+	samsung_cpu_id = __raw_readl(cpuid_addr);
+	samsung_cpu_rev = samsung_cpu_id & 0xF;
+}
diff --git a/arch/arm/plat-samsung/include/plat/cpu.h b/arch/arm/plat-samsung/include/plat/cpu.h
index b762b37..16238c8 100644
--- a/arch/arm/plat-samsung/include/plat/cpu.h
+++ b/arch/arm/plat-samsung/include/plat/cpu.h
@@ -140,6 +140,10 @@ extern void s3c64xx_init_io(struct map_desc *mach_desc, int size);
 extern void s5p_init_io(struct map_desc *mach_desc,
 			int size, void __iomem *cpuid_addr);
 
+extern void s3c24xx_init_cpu(void);
+extern void s3c64xx_init_cpu(void);
+extern void s5p_init_cpu(void __iomem *cpuid_addr);
+
 extern void s3c24xx_init_uarts(struct s3c2410_uartcfg *cfg, int no);
 
 extern void s3c24xx_init_clocks(int xtal);
diff --git a/arch/arm/plat-samsung/init.c b/arch/arm/plat-samsung/init.c
index 40b1228..79d10fc 100644
--- a/arch/arm/plat-samsung/init.c
+++ b/arch/arm/plat-samsung/init.c
@@ -30,7 +30,6 @@
 #include <plat/regs-serial.h>
 
 static struct cpu_table *cpu;
-unsigned long samsung_cpu_id;
 
 static struct cpu_table * __init s3c_lookup_cpu(unsigned long idcode,
 						struct cpu_table *tab,
-- 
1.7.1

[PATCH 4/4] ARM: EXYNOS4: Use samsung_rev() to distinguish silicon revision

[Kukjin Kim]

This patch uses samsung_rev() to support variable silicon revision of
EXYNOS4210 so that can support for EXYNOS4210 REV0, REV1.0 and REV1.1.

Note: Need to change timer setting on REV0.

Acked-by: Changhwan Youn <chaos.youn@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
---
 arch/arm/mach-exynos4/cpu.c              |   28 +++++++++++++++++++++++-----
 arch/arm/mach-exynos4/include/mach/map.h |    3 ++-
 arch/arm/mach-exynos4/platsmp.c          |    8 ++++++--
 arch/arm/plat-samsung/include/plat/cpu.h |    6 ++++++
 4 files changed, 37 insertions(+), 8 deletions(-)

diff --git a/arch/arm/mach-exynos4/cpu.c b/arch/arm/mach-exynos4/cpu.c
index 2d8a40c..f188c6d 100644
--- a/arch/arm/mach-exynos4/cpu.c
+++ b/arch/arm/mach-exynos4/cpu.c
@@ -43,11 +43,6 @@ static struct map_desc exynos4_iodesc[] __initdata = {
 		.length		= SZ_4K,
 		.type	 	= MT_DEVICE,
 	}, {
-		.virtual	= (unsigned long)S5P_VA_SYSRAM,
-		.pfn		= __phys_to_pfn(EXYNOS4_PA_SYSRAM),
-		.length		= SZ_4K,
-		.type		= MT_DEVICE,
-	}, {
 		.virtual	= (unsigned long)S5P_VA_CMU,
 		.pfn		= __phys_to_pfn(EXYNOS4_PA_CMU),
 		.length		= SZ_128K,
@@ -128,6 +123,24 @@ static void exynos4_idle(void)
 	local_irq_enable();
 }
 
+static struct map_desc exynos4_iodesc0[] __initdata = {
+	{
+		.virtual	= (unsigned long)S5P_VA_SYSRAM,
+		.pfn		= __phys_to_pfn(EXYNOS4_PA_SYSRAM0),
+		.length		= SZ_4K,
+		.type	 	= MT_DEVICE,
+	},
+};
+
+static struct map_desc exynos4_iodesc1[] __initdata = {
+	{
+		.virtual	= (unsigned long)S5P_VA_SYSRAM,
+		.pfn		= __phys_to_pfn(EXYNOS4_PA_SYSRAM1),
+		.length		= SZ_4K,
+		.type	 	= MT_DEVICE,
+	},
+};
+
 /*
  * exynos4_map_io
  *
@@ -137,6 +150,11 @@ void __init exynos4_map_io(void)
 {
 	iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
 
+	if (samsung_rev() == EXYNOS4210_REV_0)
+		iotable_init(exynos4_iodesc0, ARRAY_SIZE(exynos4_iodesc0));
+	else if (samsung_rev() == EXYNOS4210_REV_1_0)
+		iotable_init(exynos4_iodesc1, ARRAY_SIZE(exynos4_iodesc1));
+
 	/* initialize device information early */
 	exynos4_default_sdhci0();
 	exynos4_default_sdhci1();
diff --git a/arch/arm/mach-exynos4/include/mach/map.h b/arch/arm/mach-exynos4/include/mach/map.h
index d32296d..7073ac7 100644
--- a/arch/arm/mach-exynos4/include/mach/map.h
+++ b/arch/arm/mach-exynos4/include/mach/map.h
@@ -23,7 +23,8 @@
 
 #include <plat/map-s5p.h>
 
-#define EXYNOS4_PA_SYSRAM		0x02020000
+#define EXYNOS4_PA_SYSRAM0		0x02025000
+#define EXYNOS4_PA_SYSRAM1		0x02020000
 
 #define EXYNOS4_PA_FIMC0		0x11800000
 #define EXYNOS4_PA_FIMC1		0x11810000
diff --git a/arch/arm/mach-exynos4/platsmp.c b/arch/arm/mach-exynos4/platsmp.c
index 7c2282c..96cc651 100644
--- a/arch/arm/mach-exynos4/platsmp.c
+++ b/arch/arm/mach-exynos4/platsmp.c
@@ -30,9 +30,12 @@
 #include <mach/regs-clock.h>
 #include <mach/regs-pmu.h>
 
+#include <plat/cpu.h>
+
 extern void exynos4_secondary_startup(void);
 
-#define CPU1_BOOT_REG S5P_VA_SYSRAM
+#define CPU1_BOOT_REG		(samsung_rev() == EXYNOS4210_REV_1_1 ? \
+				S5P_INFORM5 : S5P_VA_SYSRAM)
 
 /*
  * control for which core is the next to come out of the secondary
@@ -216,5 +219,6 @@ void __init platform_smp_prepare_cpus(unsigned int max_cpus)
 	 * until it receives a soft interrupt, and then the
 	 * secondary CPU branches to this address.
 	 */
-	__raw_writel(BSYM(virt_to_phys(exynos4_secondary_startup)), S5P_VA_SYSRAM);
+	__raw_writel(BSYM(virt_to_phys(exynos4_secondary_startup)),
+			CPU1_BOOT_REG);
 }
diff --git a/arch/arm/plat-samsung/include/plat/cpu.h b/arch/arm/plat-samsung/include/plat/cpu.h
index 16238c8..b0d3d59 100644
--- a/arch/arm/plat-samsung/include/plat/cpu.h
+++ b/arch/arm/plat-samsung/include/plat/cpu.h
@@ -100,6 +100,10 @@ IS_SAMSUNG_CPU(exynos4210, EXYNOS4210_CPU_ID, EXYNOS4_CPU_MASK)
 # define cpu_is_exynos4210()	0
 #endif
 
+#define EXYNOS4210_REV_0	(0x0)
+#define EXYNOS4210_REV_1_0	(0x2)
+#define EXYNOS4210_REV_1_1	(0x3)
+
 #define IODESC_ENT(x) { (unsigned long)S3C24XX_VA_##x, __phys_to_pfn(S3C24XX_PA_##x), S3C24XX_SZ_##x, MT_DEVICE }
 
 #ifndef MHZ
@@ -144,6 +148,8 @@ extern void s3c24xx_init_cpu(void);
 extern void s3c64xx_init_cpu(void);
 extern void s5p_init_cpu(void __iomem *cpuid_addr);
 
+extern unsigned int samsung_rev(void);
+
 extern void s3c24xx_init_uarts(struct s3c2410_uartcfg *cfg, int no);
 
 extern void s3c24xx_init_clocks(int xtal);
-- 
1.7.1

[PATCH 0/4] ARM: SAMSUNG: Add support CPU ID and Rev. at runtime

[Kyungmin Park]

Good

change the mind to use the runtime soc detection. it's really required
feature. but previous time Ben did'n like it.
https://lkml.org/lkml/2010/3/30/831

I'm still prefer to use it when only early boot time if possible

and another mail said cpu_is_* doesn't proper name, soc_is_* is better.


Thank you,
Kyungmin Park

On Sat, Aug 20, 2011 at 2:05 PM, Kukjin Kim <kgene.kim@samsung.com> wrote:
> This patch adds support handling of CPU ID and varialble silicon revision
> at runtime.
>
> [PATCH 1/4] ARM: SAMSUNG: Add support for detecting CPU at runtime
> [PATCH 2/4] ARM: S5P64X0: Use cpu_is_s5p64x0() to distinguish cpu at runtime
> [PATCH 3/4] ARM: SAMSUNG: Add support for handling of cpu revision
> [PATCH 4/4] ARM: EXYNOS4: Use samsung_rev() to distinguish silicon revision
> --
> To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
> the body of a message to majordomo at vger.kernel.org
> More majordomo info at ?http://vger.kernel.org/majordomo-info.html
>

[PATCH 1/4] ARM: SAMSUNG: Add support for detecting CPU at runtime

[Russell King - ARM Linux]

On Sat, Aug 20, 2011 at 02:05:56PM +0900, Kukjin Kim wrote:
> The cpu_is_[name]() can be used to distinguish cpu at runtime.

This really should be soc_is_xxx().  The CPU is stuff like ARM920, ARM926,
Cortex-A9 etc.  The SoC is the CPU plus the peripherals.

S3C6410 describes the entire SoC, not just the CPU.

[PATCH 1/4] ARM: SAMSUNG: Add support for detecting CPU at runtime

[Kukjin Kim]

Russell King - ARM Linux wrote:
> 
> On Sat, Aug 20, 2011 at 02:05:56PM +0900, Kukjin Kim wrote:
> > The cpu_is_[name]() can be used to distinguish cpu at runtime.
> 
> This really should be soc_is_xxx().  The CPU is stuff like ARM920, ARM926,
> Cortex-A9 etc.  The SoC is the CPU plus the peripherals.
> 
> S3C6410 describes the entire SoC, not just the CPU.

OK and will address comments from you.

Russell, I'm not sure it is required to change CPU_XXX such as
CPU_EXYNOS4210 to SOC_XXX in Kconfig.

Thanks.

Best regards,
Kgene.
--
Kukjin Kim <kgene.kim@samsung.com>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.

[PATCH 3/4] ARM: SAMSUNG: Add support for handling of cpu revision

[Kukjin Kim]

Kukjin Kim wrote:
> 
> This patch adds plat-samsung/cpu.c for detecting of cpu id and
> silicon revision.
> 
> This patch was originally from Changhwan Youn <chaos.youn@samsung.com>
> 
> Acked-by: Changhwan Youn <chaos.youn@samsung.com>
> Cc: Ben Dooks <ben-linux@fluff.org>
> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
> ---

(snip)

> +void __init s5p_init_cpu(void __iomem *cpuid_addr)
> +{
> +	samsung_cpu_id = __raw_readl(cpuid_addr);
> +	samsung_cpu_rev = samsung_cpu_id & 0xF;

Oops, should be 0xFF not 0xF.

Thanks.

Best regards,
Kgene.
--
Kukjin Kim <kgene.kim@samsung.com>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.

[PATCH 4/4] ARM: EXYNOS4: Use samsung_rev() to distinguish silicon revision

[Kukjin Kim]

Kukjin Kim wrote:
> 
> This patch uses samsung_rev() to support variable silicon revision of
> EXYNOS4210 so that can support for EXYNOS4210 REV0, REV1.0 and REV1.1.
> 
> Note: Need to change timer setting on REV0.
> 
> Acked-by: Changhwan Youn <chaos.youn@samsung.com>
> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
> ---

(snip)

> +#define EXYNOS4210_REV_1_0	(0x2)
> +#define EXYNOS4210_REV_1_1	(0x3)

Should be following...

+#define EXYNOS4210_REV_1_0	(0x10)
+#define EXYNOS4210_REV_1_1	(0x11)

Thanks.

Best regards,
Kgene.
--
Kukjin Kim <kgene.kim@samsung.com>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.