From 559b0da2041036d37fd49b06a4254c8ef2834a54 Mon Sep 17 00:00:00 2001
From: Kasper Hettinga <kasper.hettinga@gmail.com>
Date: Sat, 27 Oct 2012 18:38:27 +0200
Subject: Add ability to under- and overvolt.

Patch set 1: original commit
Patch set 2: removed spaces
Patch set 3: increased stock voltage at 1200MHz to 1325mV
Patch set 4: changed UV interface to allow OV with Voltage Control
Patch set 5: spacing
Patch set 6: rebased
Patch set 7: allow higher OV voltage

Change-Id: Ie5f5d8ca7ed64e63b9be0aa088b99c1b8466b605
---
 arch/arm/mach-s5pv210/cpufreq.c    | 43 ++++++++++++++++++++++++++++++++++++--
 arch/arm/mach-s5pv210/mach-aries.c |  2 +-
 2 files changed, 42 insertions(+), 3 deletions(-)

(limited to 'arch/arm/mach-s5pv210')

diff --git a/arch/arm/mach-s5pv210/cpufreq.c b/arch/arm/mach-s5pv210/cpufreq.c
index 1f3f9a5..67f811e 100755
--- a/arch/arm/mach-s5pv210/cpufreq.c
+++ b/arch/arm/mach-s5pv210/cpufreq.c
@@ -98,12 +98,12 @@ static unsigned int g_dvfslockval[DVFS_LOCK_TOKEN_NUM];
 //static DEFINE_MUTEX(dvfs_high_lock);
 #endif
 
-const unsigned long arm_volt_max = 1350000;
+const unsigned long arm_volt_max = 1400000;
 const unsigned long int_volt_max = 1250000;
 
 static struct s5pv210_dvs_conf dvs_conf[] = {
 	[OC0] = {
-		.arm_volt   = 1275000,
+		.arm_volt   = 1325000,
 		.int_volt   = 1100000,
 	},
 	[L0] = {
@@ -777,3 +777,42 @@ static int __init s5pv210_cpufreq_init(void)
 }
 
 late_initcall(s5pv210_cpufreq_init);
+
+ssize_t show_UV_mV_table(struct cpufreq_policy *policy, char *buf)
+{
+	int i, len = 0;
+	for (i = 0; i <= MAX_PERF_LEVEL; i++) {
+		len += sprintf(buf + len, "%dmhz: %d mV\n", s5pv210_freq_table[i].frequency / 1000, dvs_conf[i].arm_volt / 1000);
+	}
+	return len;
+}
+
+ssize_t store_UV_mV_table(struct cpufreq_policy *policy,
+							const char *buf, size_t count)
+{
+	int ret = -EINVAL;
+	int i = 0;
+	int j = 0;
+	int u[MAX_PERF_LEVEL + 1];
+	while (j < MAX_PERF_LEVEL + 1) {
+		int consumed;
+		int val;
+		ret = sscanf(buf, "%d%n", &val, &consumed);
+		if (ret > 0) {
+			buf += consumed;
+			u[j++] = val;
+		}
+		else {
+			break;
+		}
+	}
+
+	for (i = 0; i < j; i++) {
+		if (u[i] > arm_volt_max / 1000) {
+			u[i] = arm_volt_max / 1000;
+		}
+		dvs_conf[i].arm_volt = u[i] * 1000;
+	}
+
+	return count;
+}
diff --git a/arch/arm/mach-s5pv210/mach-aries.c b/arch/arm/mach-s5pv210/mach-aries.c
index 15fff7c..c41199f 100644
--- a/arch/arm/mach-s5pv210/mach-aries.c
+++ b/arch/arm/mach-s5pv210/mach-aries.c
@@ -413,7 +413,7 @@ static struct s5p_media_device aries_media_devs[] = {
 static struct s5pv210_cpufreq_voltage smdkc110_cpufreq_volt[] = {
 	{
 		.freq	= 1200000,
-		.varm	= 1275000,
+		.varm	= 1325000,
 		.vint	= 1100000,
 	}, {
 		.freq	= 1000000,
-- 
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