Merge branch 'next-s5pv310' into for-next

Conflicts:
	arch/arm/mach-s5pv310/Makefile

7 files changed, 710 insertions, 9 deletions

diff --git a/arch/arm/mach-s5pv310/Makefile b/arch/arm/mach-s5pv310/Makefile
index e01a4d050a4c..651f1933e228 100644
--- a/arch/arm/mach-s5pv310/Makefile
+++ b/arch/arm/mach-s5pv310/Makefile
@@ -14,6 +14,7 @@ obj-				:=
 
 obj-$(CONFIG_CPU_S5PV310)       += cpu.o init.o clock.o irq-combiner.o
 obj-$(CONFIG_CPU_S5PV310)       += setup-i2c0.o time.o gpiolib.o irq-eint.o dma.o
+obj-$(CONFIG_CPU_FREQ)          += cpufreq.o
 
 obj-$(CONFIG_SMP)               += platsmp.o headsmp.o
 obj-$(CONFIG_LOCAL_TIMERS)      += localtimer.o
diff --git a/arch/arm/mach-s5pv310/clock.c b/arch/arm/mach-s5pv310/clock.c
index 6d22c43c6ee8..753fa4465876 100644
--- a/arch/arm/mach-s5pv310/clock.c
+++ b/arch/arm/mach-s5pv310/clock.c
@@ -244,7 +244,7 @@ static struct clksrc_clk clk_mout_corebus = {
                 .id             = -1,
         },
         .sources        = &clkset_mout_corebus,
-        .reg_src        = { .reg = S5P_CLKSRC_CORE, .shift = 4, .size = 1 },
+        .reg_src        = { .reg = S5P_CLKSRC_DMC, .shift = 4, .size = 1 },
 };
 
 static struct clksrc_clk clk_sclk_dmc = {
@@ -253,7 +253,7 @@ static struct clksrc_clk clk_sclk_dmc = {
                 .id             = -1,
                 .parent         = &clk_mout_corebus.clk,
         },
-        .reg_div        = { .reg = S5P_CLKDIV_CORE0, .shift = 12, .size = 3 },
+        .reg_div        = { .reg = S5P_CLKDIV_DMC0, .shift = 12, .size = 3 },
 };
 
 static struct clksrc_clk clk_aclk_cored = {
@@ -262,7 +262,7 @@ static struct clksrc_clk clk_aclk_cored = {
                 .id             = -1,
                 .parent         = &clk_sclk_dmc.clk,
         },
-        .reg_div        = { .reg = S5P_CLKDIV_CORE0, .shift = 16, .size = 3 },
+        .reg_div        = { .reg = S5P_CLKDIV_DMC0, .shift = 16, .size = 3 },
 };
 
 static struct clksrc_clk clk_aclk_corep = {
@@ -271,7 +271,7 @@ static struct clksrc_clk clk_aclk_corep = {
                 .id             = -1,
                 .parent         = &clk_aclk_cored.clk,
         },
-        .reg_div        = { .reg = S5P_CLKDIV_CORE0, .shift = 20, .size = 3 },
+        .reg_div        = { .reg = S5P_CLKDIV_DMC0, .shift = 20, .size = 3 },
 };
 
 static struct clksrc_clk clk_aclk_acp = {
@@ -280,7 +280,7 @@ static struct clksrc_clk clk_aclk_acp = {
                 .id             = -1,
                 .parent         = &clk_mout_corebus.clk,
         },
-        .reg_div        = { .reg = S5P_CLKDIV_CORE0, .shift = 0, .size = 3 },
+        .reg_div        = { .reg = S5P_CLKDIV_DMC0, .shift = 0, .size = 3 },
 };
 
 static struct clksrc_clk clk_pclk_acp = {
@@ -289,7 +289,7 @@ static struct clksrc_clk clk_pclk_acp = {
                 .id             = -1,
                 .parent         = &clk_aclk_acp.clk,
         },
-        .reg_div        = { .reg = S5P_CLKDIV_CORE0, .shift = 4, .size = 3 },
+        .reg_div        = { .reg = S5P_CLKDIV_DMC0, .shift = 4, .size = 3 },
 };
 
 /* Core list of CMU_TOP side */
@@ -1020,6 +1020,17 @@ static struct clksrc_clk *sysclks[] = {
         &clk_dout_mmc4,
 };
 
+static int xtal_rate;
+
+static unsigned long s5pv310_fout_apll_get_rate(struct clk *clk)
+{
+        return s5p_get_pll45xx(xtal_rate, __raw_readl(S5P_APLL_CON0), pll_4508);
+}
+
+static struct clk_ops s5pv310_fout_apll_ops = {
+        .get_rate = s5pv310_fout_apll_get_rate,
+};
+
 void __init_or_cpufreq s5pv310_setup_clocks(void)
 {
         struct clk *xtal_clk;
@@ -1043,6 +1054,9 @@ void __init_or_cpufreq s5pv310_setup_clocks(void)
         BUG_ON(IS_ERR(xtal_clk));
 
         xtal = clk_get_rate(xtal_clk);
+
+        xtal_rate = xtal;
+
         clk_put(xtal_clk);
 
         printk(KERN_DEBUG "%s: xtal is %ld\n", __func__, xtal);
@@ -1056,7 +1070,7 @@ void __init_or_cpufreq s5pv310_setup_clocks(void)
         vpll = s5p_get_pll46xx(vpllsrc, __raw_readl(S5P_VPLL_CON0),
                                 __raw_readl(S5P_VPLL_CON1), pll_4650);
 
-        clk_fout_apll.rate = apll;
+        clk_fout_apll.ops = &s5pv310_fout_apll_ops;
         clk_fout_mpll.rate = mpll;
         clk_fout_epll.rate = epll;
         clk_fout_vpll.rate = vpll;
diff --git a/arch/arm/mach-s5pv310/cpu.c b/arch/arm/mach-s5pv310/cpu.c
index 9900464082db..72092db104c5 100644
--- a/arch/arm/mach-s5pv310/cpu.c
+++ b/arch/arm/mach-s5pv310/cpu.c
@@ -78,6 +78,11 @@ static struct map_desc s5pv310_iodesc[] __initdata = {
                 .length         = SZ_256,
                 .type           = MT_DEVICE,
         }, {
+                .virtual        = (unsigned long)S5P_VA_DMC0,
+                .pfn            = __phys_to_pfn(S5PV310_PA_DMC0),
+                .length         = SZ_4K,
+                .type           = MT_DEVICE,
+        }, {
                 .virtual        = (unsigned long)S3C_VA_UART,
                 .pfn            = __phys_to_pfn(S3C_PA_UART),
                 .length         = SZ_512K,
diff --git a/arch/arm/mach-s5pv310/cpufreq.c b/arch/arm/mach-s5pv310/cpufreq.c
new file mode 100644
index 000000000000..b04cbc731128
--- /dev/null
+++ b/arch/arm/mach-s5pv310/cpufreq.c
@@ -0,0 +1,580 @@
+/* linux/arch/arm/mach-s5pv310/cpufreq.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com
+ *
+ * S5PV310 - CPU frequency scaling 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/types.h>
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/regulator/consumer.h>
+#include <linux/cpufreq.h>
+
+#include <mach/map.h>
+#include <mach/regs-clock.h>
+#include <mach/regs-mem.h>
+
+#include <plat/clock.h>
+#include <plat/pm.h>
+
+static struct clk *cpu_clk;
+static struct clk *moutcore;
+static struct clk *mout_mpll;
+static struct clk *mout_apll;
+
+#ifdef CONFIG_REGULATOR
+static struct regulator *arm_regulator;
+static struct regulator *int_regulator;
+#endif
+
+static struct cpufreq_freqs freqs;
+static unsigned int memtype;
+
+enum s5pv310_memory_type {
+        DDR2 = 4,
+        LPDDR2,
+        DDR3,
+};
+
+enum cpufreq_level_index {
+        L0, L1, L2, L3, CPUFREQ_LEVEL_END,
+};
+
+static struct cpufreq_frequency_table s5pv310_freq_table[] = {
+        {L0, 1000*1000},
+        {L1, 800*1000},
+        {L2, 400*1000},
+        {L3, 100*1000},
+        {0, CPUFREQ_TABLE_END},
+};
+
+static unsigned int clkdiv_cpu0[CPUFREQ_LEVEL_END][7] = {
+        /*
+         * Clock divider value for following
+         * { DIVCORE, DIVCOREM0, DIVCOREM1, DIVPERIPH,
+         *              DIVATB, DIVPCLK_DBG, DIVAPLL }
+         */
+
+        /* ARM L0: 1000MHz */
+        { 0, 3, 7, 3, 3, 0, 1 },
+
+        /* ARM L1: 800MHz */
+        { 0, 3, 7, 3, 3, 0, 1 },
+
+        /* ARM L2: 400MHz */
+        { 0, 1, 3, 1, 3, 0, 1 },
+
+        /* ARM L3: 100MHz */
+        { 0, 0, 1, 0, 3, 1, 1 },
+};
+
+static unsigned int clkdiv_cpu1[CPUFREQ_LEVEL_END][2] = {
+        /*
+         * Clock divider value for following
+         * { DIVCOPY, DIVHPM }
+         */
+
+         /* ARM L0: 1000MHz */
+        { 3, 0 },
+
+        /* ARM L1: 800MHz */
+        { 3, 0 },
+
+        /* ARM L2: 400MHz */
+        { 3, 0 },
+
+        /* ARM L3: 100MHz */
+        { 3, 0 },
+};
+
+static unsigned int clkdiv_dmc0[CPUFREQ_LEVEL_END][8] = {
+        /*
+         * Clock divider value for following
+         * { DIVACP, DIVACP_PCLK, DIVDPHY, DIVDMC, DIVDMCD
+         *              DIVDMCP, DIVCOPY2, DIVCORE_TIMERS }
+         */
+
+        /* DMC L0: 400MHz */
+        { 3, 1, 1, 1, 1, 1, 3, 1 },
+
+        /* DMC L1: 400MHz */
+        { 3, 1, 1, 1, 1, 1, 3, 1 },
+
+        /* DMC L2: 266.7MHz */
+        { 7, 1, 1, 2, 1, 1, 3, 1 },
+
+        /* DMC L3: 200MHz */
+        { 7, 1, 1, 3, 1, 1, 3, 1 },
+};
+
+static unsigned int clkdiv_top[CPUFREQ_LEVEL_END][5] = {
+        /*
+         * Clock divider value for following
+         * { DIVACLK200, DIVACLK100, DIVACLK160, DIVACLK133, DIVONENAND }
+         */
+
+        /* ACLK200 L0: 200MHz */
+        { 3, 7, 4, 5, 1 },
+
+        /* ACLK200 L1: 200MHz */
+        { 3, 7, 4, 5, 1 },
+
+        /* ACLK200 L2: 160MHz */
+        { 4, 7, 5, 7, 1 },
+
+        /* ACLK200 L3: 133.3MHz */
+        { 5, 7, 7, 7, 1 },
+};
+
+static unsigned int clkdiv_lr_bus[CPUFREQ_LEVEL_END][2] = {
+        /*
+         * Clock divider value for following
+         * { DIVGDL/R, DIVGPL/R }
+         */
+
+        /* ACLK_GDL/R L0: 200MHz */
+        { 3, 1 },
+
+        /* ACLK_GDL/R L1: 200MHz */
+        { 3, 1 },
+
+        /* ACLK_GDL/R L2: 160MHz */
+        { 4, 1 },
+
+        /* ACLK_GDL/R L3: 133.3MHz */
+        { 5, 1 },
+};
+
+struct cpufreq_voltage_table {
+        unsigned int    index;          /* any */
+        unsigned int    arm_volt;       /* uV */
+        unsigned int    int_volt;
+};
+
+static struct cpufreq_voltage_table s5pv310_volt_table[CPUFREQ_LEVEL_END] = {
+        {
+                .index          = L0,
+                .arm_volt       = 1200000,
+                .int_volt       = 1100000,
+        }, {
+                .index          = L1,
+                .arm_volt       = 1100000,
+                .int_volt       = 1100000,
+        }, {
+                .index          = L2,
+                .arm_volt       = 1000000,
+                .int_volt       = 1000000,
+        }, {
+                .index          = L3,
+                .arm_volt       = 900000,
+                .int_volt       = 1000000,
+        },
+};
+
+static unsigned int s5pv310_apll_pms_table[CPUFREQ_LEVEL_END] = {
+        /* APLL FOUT L0: 1000MHz */
+        ((250 << 16) | (6 << 8) | 1),
+
+        /* APLL FOUT L1: 800MHz */
+        ((200 << 16) | (6 << 8) | 1),
+
+        /* APLL FOUT L2 : 400MHz */
+        ((200 << 16) | (6 << 8) | 2),
+
+        /* APLL FOUT L3: 100MHz */
+        ((200 << 16) | (6 << 8) | 4),
+};
+
+int s5pv310_verify_speed(struct cpufreq_policy *policy)
+{
+        return cpufreq_frequency_table_verify(policy, s5pv310_freq_table);
+}
+
+unsigned int s5pv310_getspeed(unsigned int cpu)
+{
+        return clk_get_rate(cpu_clk) / 1000;
+}
+
+void s5pv310_set_clkdiv(unsigned int div_index)
+{
+        unsigned int tmp;
+
+        /* Change Divider - CPU0 */
+
+        tmp = __raw_readl(S5P_CLKDIV_CPU);
+
+        tmp &= ~(S5P_CLKDIV_CPU0_CORE_MASK | S5P_CLKDIV_CPU0_COREM0_MASK |
+                S5P_CLKDIV_CPU0_COREM1_MASK | S5P_CLKDIV_CPU0_PERIPH_MASK |
+                S5P_CLKDIV_CPU0_ATB_MASK | S5P_CLKDIV_CPU0_PCLKDBG_MASK |
+                S5P_CLKDIV_CPU0_APLL_MASK);
+
+        tmp |= ((clkdiv_cpu0[div_index][0] << S5P_CLKDIV_CPU0_CORE_SHIFT) |
+                (clkdiv_cpu0[div_index][1] << S5P_CLKDIV_CPU0_COREM0_SHIFT) |
+                (clkdiv_cpu0[div_index][2] << S5P_CLKDIV_CPU0_COREM1_SHIFT) |
+                (clkdiv_cpu0[div_index][3] << S5P_CLKDIV_CPU0_PERIPH_SHIFT) |
+                (clkdiv_cpu0[div_index][4] << S5P_CLKDIV_CPU0_ATB_SHIFT) |
+                (clkdiv_cpu0[div_index][5] << S5P_CLKDIV_CPU0_PCLKDBG_SHIFT) |
+                (clkdiv_cpu0[div_index][6] << S5P_CLKDIV_CPU0_APLL_SHIFT));
+
+        __raw_writel(tmp, S5P_CLKDIV_CPU);
+
+        do {
+                tmp = __raw_readl(S5P_CLKDIV_STATCPU);
+        } while (tmp & 0x1111111);
+
+        /* Change Divider - CPU1 */
+
+        tmp = __raw_readl(S5P_CLKDIV_CPU1);
+
+        tmp &= ~((0x7 << 4) | 0x7);
+
+        tmp |= ((clkdiv_cpu1[div_index][0] << 4) |
+                (clkdiv_cpu1[div_index][1] << 0));
+
+        __raw_writel(tmp, S5P_CLKDIV_CPU1);
+
+        do {
+                tmp = __raw_readl(S5P_CLKDIV_STATCPU1);
+        } while (tmp & 0x11);
+
+        /* Change Divider - DMC0 */
+
+        tmp = __raw_readl(S5P_CLKDIV_DMC0);
+
+        tmp &= ~(S5P_CLKDIV_DMC0_ACP_MASK | S5P_CLKDIV_DMC0_ACPPCLK_MASK |
+                S5P_CLKDIV_DMC0_DPHY_MASK | S5P_CLKDIV_DMC0_DMC_MASK |
+                S5P_CLKDIV_DMC0_DMCD_MASK | S5P_CLKDIV_DMC0_DMCP_MASK |
+                S5P_CLKDIV_DMC0_COPY2_MASK | S5P_CLKDIV_DMC0_CORETI_MASK);
+
+        tmp |= ((clkdiv_dmc0[div_index][0] << S5P_CLKDIV_DMC0_ACP_SHIFT) |
+                (clkdiv_dmc0[div_index][1] << S5P_CLKDIV_DMC0_ACPPCLK_SHIFT) |
+                (clkdiv_dmc0[div_index][2] << S5P_CLKDIV_DMC0_DPHY_SHIFT) |
+                (clkdiv_dmc0[div_index][3] << S5P_CLKDIV_DMC0_DMC_SHIFT) |
+                (clkdiv_dmc0[div_index][4] << S5P_CLKDIV_DMC0_DMCD_SHIFT) |
+                (clkdiv_dmc0[div_index][5] << S5P_CLKDIV_DMC0_DMCP_SHIFT) |
+                (clkdiv_dmc0[div_index][6] << S5P_CLKDIV_DMC0_COPY2_SHIFT) |
+                (clkdiv_dmc0[div_index][7] << S5P_CLKDIV_DMC0_CORETI_SHIFT));
+
+        __raw_writel(tmp, S5P_CLKDIV_DMC0);
+
+        do {
+                tmp = __raw_readl(S5P_CLKDIV_STAT_DMC0);
+        } while (tmp & 0x11111111);
+
+        /* Change Divider - TOP */
+
+        tmp = __raw_readl(S5P_CLKDIV_TOP);
+
+        tmp &= ~(S5P_CLKDIV_TOP_ACLK200_MASK | S5P_CLKDIV_TOP_ACLK100_MASK |
+                S5P_CLKDIV_TOP_ACLK160_MASK | S5P_CLKDIV_TOP_ACLK133_MASK |
+                S5P_CLKDIV_TOP_ONENAND_MASK);
+
+        tmp |= ((clkdiv_top[div_index][0] << S5P_CLKDIV_TOP_ACLK200_SHIFT) |
+                (clkdiv_top[div_index][1] << S5P_CLKDIV_TOP_ACLK100_SHIFT) |
+                (clkdiv_top[div_index][2] << S5P_CLKDIV_TOP_ACLK160_SHIFT) |
+                (clkdiv_top[div_index][3] << S5P_CLKDIV_TOP_ACLK133_SHIFT) |
+                (clkdiv_top[div_index][4] << S5P_CLKDIV_TOP_ONENAND_SHIFT));
+
+        __raw_writel(tmp, S5P_CLKDIV_TOP);
+
+        do {
+                tmp = __raw_readl(S5P_CLKDIV_STAT_TOP);
+        } while (tmp & 0x11111);
+
+        /* Change Divider - LEFTBUS */
+
+        tmp = __raw_readl(S5P_CLKDIV_LEFTBUS);
+
+        tmp &= ~(S5P_CLKDIV_BUS_GDLR_MASK | S5P_CLKDIV_BUS_GPLR_MASK);
+
+        tmp |= ((clkdiv_lr_bus[div_index][0] << S5P_CLKDIV_BUS_GDLR_SHIFT) |
+                (clkdiv_lr_bus[div_index][1] << S5P_CLKDIV_BUS_GPLR_SHIFT));
+
+        __raw_writel(tmp, S5P_CLKDIV_LEFTBUS);
+
+        do {
+                tmp = __raw_readl(S5P_CLKDIV_STAT_LEFTBUS);
+        } while (tmp & 0x11);
+
+        /* Change Divider - RIGHTBUS */
+
+        tmp = __raw_readl(S5P_CLKDIV_RIGHTBUS);
+
+        tmp &= ~(S5P_CLKDIV_BUS_GDLR_MASK | S5P_CLKDIV_BUS_GPLR_MASK);
+
+        tmp |= ((clkdiv_lr_bus[div_index][0] << S5P_CLKDIV_BUS_GDLR_SHIFT) |
+                (clkdiv_lr_bus[div_index][1] << S5P_CLKDIV_BUS_GPLR_SHIFT));
+
+        __raw_writel(tmp, S5P_CLKDIV_RIGHTBUS);
+
+        do {
+                tmp = __raw_readl(S5P_CLKDIV_STAT_RIGHTBUS);
+        } while (tmp & 0x11);
+}
+
+static void s5pv310_set_apll(unsigned int index)
+{
+        unsigned int tmp;
+
+        /* 1. MUX_CORE_SEL = MPLL, ARMCLK uses MPLL for lock time */
+        clk_set_parent(moutcore, mout_mpll);
+
+        do {
+                tmp = (__raw_readl(S5P_CLKMUX_STATCPU)
+                        >> S5P_CLKSRC_CPU_MUXCORE_SHIFT);
+                tmp &= 0x7;
+        } while (tmp != 0x2);
+
+        /* 2. Set APLL Lock time */
+        __raw_writel(S5P_APLL_LOCKTIME, S5P_APLL_LOCK);
+
+        /* 3. Change PLL PMS values */
+        tmp = __raw_readl(S5P_APLL_CON0);
+        tmp &= ~((0x3ff << 16) | (0x3f << 8) | (0x7 << 0));
+        tmp |= s5pv310_apll_pms_table[index];
+        __raw_writel(tmp, S5P_APLL_CON0);
+
+        /* 4. wait_lock_time */
+        do {
+                tmp = __raw_readl(S5P_APLL_CON0);
+        } while (!(tmp & (0x1 << S5P_APLLCON0_LOCKED_SHIFT)));
+
+        /* 5. MUX_CORE_SEL = APLL */
+        clk_set_parent(moutcore, mout_apll);
+
+        do {
+                tmp = __raw_readl(S5P_CLKMUX_STATCPU);
+                tmp &= S5P_CLKMUX_STATCPU_MUXCORE_MASK;
+        } while (tmp != (0x1 << S5P_CLKSRC_CPU_MUXCORE_SHIFT));
+}
+
+static void s5pv310_set_frequency(unsigned int old_index, unsigned int new_index)
+{
+        unsigned int tmp;
+
+        if (old_index > new_index) {
+                /* The frequency changing to L0 needs to change apll */
+                if (freqs.new == s5pv310_freq_table[L0].frequency) {
+                        /* 1. Change the system clock divider values */
+                        s5pv310_set_clkdiv(new_index);
+
+                        /* 2. Change the apll m,p,s value */
+                        s5pv310_set_apll(new_index);
+                } else {
+                        /* 1. Change the system clock divider values */
+                        s5pv310_set_clkdiv(new_index);
+
+                        /* 2. Change just s value in apll m,p,s value */
+                        tmp = __raw_readl(S5P_APLL_CON0);
+                        tmp &= ~(0x7 << 0);
+                        tmp |= (s5pv310_apll_pms_table[new_index] & 0x7);
+                        __raw_writel(tmp, S5P_APLL_CON0);
+                }
+        }
+
+        else if (old_index < new_index) {
+                /* The frequency changing from L0 needs to change apll */
+                if (freqs.old == s5pv310_freq_table[L0].frequency) {
+                        /* 1. Change the apll m,p,s value */
+                        s5pv310_set_apll(new_index);
+
+                        /* 2. Change the system clock divider values */
+                        s5pv310_set_clkdiv(new_index);
+                } else {
+                        /* 1. Change just s value in apll m,p,s value */
+                        tmp = __raw_readl(S5P_APLL_CON0);
+                        tmp &= ~(0x7 << 0);
+                        tmp |= (s5pv310_apll_pms_table[new_index] & 0x7);
+                        __raw_writel(tmp, S5P_APLL_CON0);
+
+                        /* 2. Change the system clock divider values */
+                        s5pv310_set_clkdiv(new_index);
+                }
+        }
+}
+
+static int s5pv310_target(struct cpufreq_policy *policy,
+                          unsigned int target_freq,
+                          unsigned int relation)
+{
+        unsigned int index, old_index;
+        unsigned int arm_volt, int_volt;
+
+        freqs.old = s5pv310_getspeed(policy->cpu);
+
+        if (cpufreq_frequency_table_target(policy, s5pv310_freq_table,
+                                           freqs.old, relation, &old_index))
+                return -EINVAL;
+
+        if (cpufreq_frequency_table_target(policy, s5pv310_freq_table,
+                                           target_freq, relation, &index))
+                return -EINVAL;
+
+        freqs.new = s5pv310_freq_table[index].frequency;
+        freqs.cpu = policy->cpu;
+
+        if (freqs.new == freqs.old)
+                return 0;
+
+        /* get the voltage value */
+        arm_volt = s5pv310_volt_table[index].arm_volt;
+        int_volt = s5pv310_volt_table[index].int_volt;
+
+        cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
+
+        /* control regulator */
+        if (freqs.new > freqs.old) {
+                /* Voltage up */
+#ifdef CONFIG_REGULATOR
+                regulator_set_voltage(arm_regulator, arm_volt, arm_volt);
+                regulator_set_voltage(int_regulator, int_volt, int_volt);
+#endif
+        }
+
+        /* Clock Configuration Procedure */
+        s5pv310_set_frequency(old_index, index);
+
+        /* control regulator */
+        if (freqs.new < freqs.old) {
+                /* Voltage down */
+#ifdef CONFIG_REGULATOR
+                regulator_set_voltage(arm_regulator, arm_volt, arm_volt);
+                regulator_set_voltage(int_regulator, int_volt, int_volt);
+#endif
+        }
+
+        cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
+
+        return 0;
+}
+
+#ifdef CONFIG_PM
+static int s5pv310_cpufreq_suspend(struct cpufreq_policy *policy,
+                                   pm_message_t pmsg)
+{
+        return 0;
+}
+
+static int s5pv310_cpufreq_resume(struct cpufreq_policy *policy)
+{
+        return 0;
+}
+#endif
+
+static int s5pv310_cpufreq_cpu_init(struct cpufreq_policy *policy)
+{
+        policy->cur = policy->min = policy->max = s5pv310_getspeed(policy->cpu);
+
+        cpufreq_frequency_table_get_attr(s5pv310_freq_table, policy->cpu);
+
+        /* set the transition latency value */
+        policy->cpuinfo.transition_latency = 100000;
+
+        /*
+         * S5PV310 multi-core processors has 2 cores
+         * that the frequency cannot be set independently.
+         * Each cpu is bound to the same speed.
+         * So the affected cpu is all of the cpus.
+         */
+        cpumask_setall(policy->cpus);
+
+        return cpufreq_frequency_table_cpuinfo(policy, s5pv310_freq_table);
+}
+
+static struct cpufreq_driver s5pv310_driver = {
+        .flags          = CPUFREQ_STICKY,
+        .verify         = s5pv310_verify_speed,
+        .target         = s5pv310_target,
+        .get            = s5pv310_getspeed,
+        .init           = s5pv310_cpufreq_cpu_init,
+        .name           = "s5pv310_cpufreq",
+#ifdef CONFIG_PM
+        .suspend        = s5pv310_cpufreq_suspend,
+        .resume         = s5pv310_cpufreq_resume,
+#endif
+};
+
+static int __init s5pv310_cpufreq_init(void)
+{
+        cpu_clk = clk_get(NULL, "armclk");
+        if (IS_ERR(cpu_clk))
+                return PTR_ERR(cpu_clk);
+
+        moutcore = clk_get(NULL, "moutcore");
+        if (IS_ERR(moutcore))
+                goto out;
+
+        mout_mpll = clk_get(NULL, "mout_mpll");
+        if (IS_ERR(mout_mpll))
+                goto out;
+
+        mout_apll = clk_get(NULL, "mout_apll");
+        if (IS_ERR(mout_apll))
+                goto out;
+
+#ifdef CONFIG_REGULATOR
+        arm_regulator = regulator_get(NULL, "vdd_arm");
+        if (IS_ERR(arm_regulator)) {
+                printk(KERN_ERR "failed to get resource %s\n", "vdd_arm");
+                goto out;
+        }
+
+        int_regulator = regulator_get(NULL, "vdd_int");
+        if (IS_ERR(int_regulator)) {
+                printk(KERN_ERR "failed to get resource %s\n", "vdd_int");
+                goto out;
+        }
+#endif
+
+        /*
+         * Check DRAM type.
+         * Because DVFS level is different according to DRAM type.
+         */
+        memtype = __raw_readl(S5P_VA_DMC0 + S5P_DMC0_MEMCON_OFFSET);
+        memtype = (memtype >> S5P_DMC0_MEMTYPE_SHIFT);
+        memtype &= S5P_DMC0_MEMTYPE_MASK;
+
+        if ((memtype < DDR2) && (memtype > DDR3)) {
+                printk(KERN_ERR "%s: wrong memtype= 0x%x\n", __func__, memtype);
+                goto out;
+        } else {
+                printk(KERN_DEBUG "%s: memtype= 0x%x\n", __func__, memtype);
+        }
+
+        return cpufreq_register_driver(&s5pv310_driver);
+
+out:
+        if (!IS_ERR(cpu_clk))
+                clk_put(cpu_clk);
+
+        if (!IS_ERR(moutcore))
+                clk_put(moutcore);
+
+        if (!IS_ERR(mout_mpll))
+                clk_put(mout_mpll);
+
+        if (!IS_ERR(mout_apll))
+                clk_put(mout_apll);
+
+#ifdef CONFIG_REGULATOR
+        if (!IS_ERR(arm_regulator))
+                regulator_put(arm_regulator);
+
+        if (!IS_ERR(int_regulator))
+                regulator_put(int_regulator);
+#endif
+
+        printk(KERN_ERR "%s: failed initialization\n", __func__);
+
+        return -EINVAL;
+}
+late_initcall(s5pv310_cpufreq_init);
diff --git a/arch/arm/mach-s5pv310/include/mach/map.h b/arch/arm/mach-s5pv310/include/mach/map.h
index 44af3e821da2..33bcff2a9568 100644
--- a/arch/arm/mach-s5pv310/include/mach/map.h
+++ b/arch/arm/mach-s5pv310/include/mach/map.h
@@ -46,6 +46,8 @@
 #define S5PV310_PA_WATCHDOG             (0x10060000)
 #define S5PV310_PA_RTC                  (0x10070000)
 
+#define S5PV310_PA_DMC0                 (0x10400000)
+
 #define S5PV310_PA_COMBINER             (0x10448000)
 
 #define S5PV310_PA_COREPERI             (0x10500000)
diff --git a/arch/arm/mach-s5pv310/include/mach/regs-clock.h b/arch/arm/mach-s5pv310/include/mach/regs-clock.h
index f1028cad9788..b5c4ada1cff5 100644
--- a/arch/arm/mach-s5pv310/include/mach/regs-clock.h
+++ b/arch/arm/mach-s5pv310/include/mach/regs-clock.h
@@ -19,6 +19,12 @@
 
 #define S5P_INFORM0                     S5P_CLKREG(0x800)
 
+#define S5P_CLKDIV_LEFTBUS              S5P_CLKREG(0x04500)
+#define S5P_CLKDIV_STAT_LEFTBUS         S5P_CLKREG(0x04600)
+
+#define S5P_CLKDIV_RIGHTBUS             S5P_CLKREG(0x08500)
+#define S5P_CLKDIV_STAT_RIGHTBUS        S5P_CLKREG(0x08600)
+
 #define S5P_EPLL_CON0                   S5P_CLKREG(0x0C110)
 #define S5P_EPLL_CON1                   S5P_CLKREG(0x0C114)
 #define S5P_VPLL_CON0                   S5P_CLKREG(0x0C120)
@@ -58,6 +64,8 @@
 #define S5P_CLKSRC_MASK_PERIL0          S5P_CLKREG(0x0C350)
 #define S5P_CLKSRC_MASK_PERIL1          S5P_CLKREG(0x0C354)
 
+#define S5P_CLKDIV_STAT_TOP             S5P_CLKREG(0x0C610)
+
 #define S5P_CLKGATE_IP_CAM              S5P_CLKREG(0x0C920)
 #define S5P_CLKGATE_IP_IMAGE            S5P_CLKREG(0x0C930)
 #define S5P_CLKGATE_IP_LCD0             S5P_CLKREG(0x0C934)
@@ -66,8 +74,9 @@
 #define S5P_CLKGATE_IP_PERIL            S5P_CLKREG(0x0C950)
 #define S5P_CLKGATE_IP_PERIR            S5P_CLKREG(0x0C960)
 
-#define S5P_CLKSRC_CORE                 S5P_CLKREG(0x10200)
-#define S5P_CLKDIV_CORE0                S5P_CLKREG(0x10500)
+#define S5P_CLKSRC_DMC                  S5P_CLKREG(0x10200)
+#define S5P_CLKDIV_DMC0                 S5P_CLKREG(0x10500)
+#define S5P_CLKDIV_STAT_DMC0            S5P_CLKREG(0x10600)
 
 #define S5P_APLL_LOCK                   S5P_CLKREG(0x14000)
 #define S5P_MPLL_LOCK                   S5P_CLKREG(0x14004)
@@ -80,10 +89,77 @@
 #define S5P_CLKMUX_STATCPU              S5P_CLKREG(0x14400)
 
 #define S5P_CLKDIV_CPU                  S5P_CLKREG(0x14500)
+#define S5P_CLKDIV_CPU1                 S5P_CLKREG(0x14504)
 #define S5P_CLKDIV_STATCPU              S5P_CLKREG(0x14600)
+#define S5P_CLKDIV_STATCPU1             S5P_CLKREG(0x14604)
 
 #define S5P_CLKGATE_SCLKCPU             S5P_CLKREG(0x14800)
 
+/* APLL_LOCK */
+#define S5P_APLL_LOCKTIME               (0x1C20)        /* 300us */
+
+/* APLL_CON0 */
+#define S5P_APLLCON0_ENABLE_SHIFT       (31)
+#define S5P_APLLCON0_LOCKED_SHIFT       (29)
+#define S5P_APLL_VAL_1000               ((250 << 16) | (6 << 8) | 1)
+#define S5P_APLL_VAL_800                ((200 << 16) | (6 << 8) | 1)
+
+/* CLK_SRC_CPU */
+#define S5P_CLKSRC_CPU_MUXCORE_SHIFT    (16)
+#define S5P_CLKMUX_STATCPU_MUXCORE_MASK (0x7 << S5P_CLKSRC_CPU_MUXCORE_SHIFT)
+
+/* CLKDIV_CPU0 */
+#define S5P_CLKDIV_CPU0_CORE_SHIFT      (0)
+#define S5P_CLKDIV_CPU0_CORE_MASK       (0x7 << S5P_CLKDIV_CPU0_CORE_SHIFT)
+#define S5P_CLKDIV_CPU0_COREM0_SHIFT    (4)
+#define S5P_CLKDIV_CPU0_COREM0_MASK     (0x7 << S5P_CLKDIV_CPU0_COREM0_SHIFT)
+#define S5P_CLKDIV_CPU0_COREM1_SHIFT    (8)
+#define S5P_CLKDIV_CPU0_COREM1_MASK     (0x7 << S5P_CLKDIV_CPU0_COREM1_SHIFT)
+#define S5P_CLKDIV_CPU0_PERIPH_SHIFT    (12)
+#define S5P_CLKDIV_CPU0_PERIPH_MASK     (0x7 << S5P_CLKDIV_CPU0_PERIPH_SHIFT)
+#define S5P_CLKDIV_CPU0_ATB_SHIFT       (16)
+#define S5P_CLKDIV_CPU0_ATB_MASK        (0x7 << S5P_CLKDIV_CPU0_ATB_SHIFT)
+#define S5P_CLKDIV_CPU0_PCLKDBG_SHIFT   (20)
+#define S5P_CLKDIV_CPU0_PCLKDBG_MASK    (0x7 << S5P_CLKDIV_CPU0_PCLKDBG_SHIFT)
+#define S5P_CLKDIV_CPU0_APLL_SHIFT      (24)
+#define S5P_CLKDIV_CPU0_APLL_MASK       (0x7 << S5P_CLKDIV_CPU0_APLL_SHIFT)
+
+/* CLKDIV_DMC0 */
+#define S5P_CLKDIV_DMC0_ACP_SHIFT       (0)
+#define S5P_CLKDIV_DMC0_ACP_MASK        (0x7 << S5P_CLKDIV_DMC0_ACP_SHIFT)
+#define S5P_CLKDIV_DMC0_ACPPCLK_SHIFT   (4)
+#define S5P_CLKDIV_DMC0_ACPPCLK_MASK    (0x7 << S5P_CLKDIV_DMC0_ACPPCLK_SHIFT)
+#define S5P_CLKDIV_DMC0_DPHY_SHIFT      (8)
+#define S5P_CLKDIV_DMC0_DPHY_MASK       (0x7 << S5P_CLKDIV_DMC0_DPHY_SHIFT)
+#define S5P_CLKDIV_DMC0_DMC_SHIFT       (12)
+#define S5P_CLKDIV_DMC0_DMC_MASK        (0x7 << S5P_CLKDIV_DMC0_DMC_SHIFT)
+#define S5P_CLKDIV_DMC0_DMCD_SHIFT      (16)
+#define S5P_CLKDIV_DMC0_DMCD_MASK       (0x7 << S5P_CLKDIV_DMC0_DMCD_SHIFT)
+#define S5P_CLKDIV_DMC0_DMCP_SHIFT      (20)
+#define S5P_CLKDIV_DMC0_DMCP_MASK       (0x7 << S5P_CLKDIV_DMC0_DMCP_SHIFT)
+#define S5P_CLKDIV_DMC0_COPY2_SHIFT     (24)
+#define S5P_CLKDIV_DMC0_COPY2_MASK      (0x7 << S5P_CLKDIV_DMC0_COPY2_SHIFT)
+#define S5P_CLKDIV_DMC0_CORETI_SHIFT    (28)
+#define S5P_CLKDIV_DMC0_CORETI_MASK     (0x7 << S5P_CLKDIV_DMC0_CORETI_SHIFT)
+
+/* CLKDIV_TOP */
+#define S5P_CLKDIV_TOP_ACLK200_SHIFT    (0)
+#define S5P_CLKDIV_TOP_ACLK200_MASK     (0x7 << S5P_CLKDIV_TOP_ACLK200_SHIFT)
+#define S5P_CLKDIV_TOP_ACLK100_SHIFT    (4)
+#define S5P_CLKDIV_TOP_ACLK100_MASK     (0xf << S5P_CLKDIV_TOP_ACLK100_SHIFT)
+#define S5P_CLKDIV_TOP_ACLK160_SHIFT    (8)
+#define S5P_CLKDIV_TOP_ACLK160_MASK     (0x7 << S5P_CLKDIV_TOP_ACLK160_SHIFT)
+#define S5P_CLKDIV_TOP_ACLK133_SHIFT    (12)
+#define S5P_CLKDIV_TOP_ACLK133_MASK     (0x7 << S5P_CLKDIV_TOP_ACLK133_SHIFT)
+#define S5P_CLKDIV_TOP_ONENAND_SHIFT    (16)
+#define S5P_CLKDIV_TOP_ONENAND_MASK     (0x7 << S5P_CLKDIV_TOP_ONENAND_SHIFT)
+
+/* CLKDIV_LEFTBUS / CLKDIV_RIGHTBUS*/
+#define S5P_CLKDIV_BUS_GDLR_SHIFT       (0)
+#define S5P_CLKDIV_BUS_GDLR_MASK        (0x7 << S5P_CLKDIV_BUS_GDLR_SHIFT)
+#define S5P_CLKDIV_BUS_GPLR_SHIFT       (4)
+#define S5P_CLKDIV_BUS_GPLR_MASK        (0x7 << S5P_CLKDIV_BUS_GPLR_SHIFT)
+
 /* Compatibility defines */
 
 #define S5P_EPLL_CON                    S5P_EPLL_CON0
diff --git a/arch/arm/mach-s5pv310/include/mach/regs-mem.h b/arch/arm/mach-s5pv310/include/mach/regs-mem.h
new file mode 100644
index 000000000000..834227140eaa
--- /dev/null
+++ b/arch/arm/mach-s5pv310/include/mach/regs-mem.h
@@ -0,0 +1,23 @@
+/* linux/arch/arm/mach-s5pv310/include/mach/regs-mem.h
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com
+ *
+ * S5PV310 - SROMC and DMC register definitions
+ *
+ * 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.
+*/
+
+#ifndef __ASM_ARCH_REGS_MEM_H
+#define __ASM_ARCH_REGS_MEM_H __FILE__
+
+#include <mach/map.h>
+
+#define S5P_DMC0_MEMCON_OFFSET          0x04
+
+#define S5P_DMC0_MEMTYPE_SHIFT          8
+#define S5P_DMC0_MEMTYPE_MASK           0xF
+
+#endif /* __ASM_ARCH_REGS_MEM_H */