aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAndrey Konovalov <andrey.konovalov@linaro.org>2012-01-13 21:36:05 +0400
committerAndrey Konovalov <andrey.konovalov@linaro.org>2012-01-13 21:36:15 +0400
commit70df977b8157276fff0794660e8590f316ca6458 (patch)
treeae4331d83d15806dec32ec8d3b0d21747fff02fe
parentb6d31b946185ce89c10d113351a1e61932d26603 (diff)
parent17c05c6dee35a7e8eb3f3ac9f06c49c96daa3972 (diff)
downloadvexpress-lsk-70df977b8157276fff0794660e8590f316ca6458.tar.gz
Merge branch 'thermal_cpu_cooling' into linux-linaro-tracking
-rw-r--r--Documentation/thermal/cpu-cooling-api.txt52
-rw-r--r--Documentation/thermal/sysfs-api.txt4
-rw-r--r--arch/arm/mach-exynos/Kconfig12
-rw-r--r--arch/arm/mach-exynos/Makefile1
-rw-r--r--arch/arm/mach-exynos/clock.c4
-rw-r--r--arch/arm/mach-exynos/dev-tmu.c64
-rw-r--r--arch/arm/mach-exynos/include/mach/cpufreq.h34
-rw-r--r--arch/arm/mach-exynos/include/mach/irqs.h2
-rw-r--r--arch/arm/mach-exynos/include/mach/map.h1
-rw-r--r--arch/arm/mach-exynos/mach-origen.c1
-rw-r--r--arch/arm/plat-samsung/include/plat/devs.h1
-rw-r--r--drivers/cpufreq/Kconfig.arm15
-rw-r--r--drivers/cpufreq/Makefile1
-rw-r--r--drivers/cpufreq/exynos-cpufreq.c290
-rw-r--r--drivers/cpufreq/exynos4210-cpufreq.c643
-rw-r--r--drivers/hwmon/exynos4_tmu.c34
-rw-r--r--drivers/thermal/Kconfig19
-rw-r--r--drivers/thermal/Makefile2
-rw-r--r--drivers/thermal/cpu_cooling.c302
-rw-r--r--drivers/thermal/exynos_thermal.c255
-rw-r--r--drivers/thermal/thermal_sys.c27
-rw-r--r--include/linux/cpu_cooling.h45
-rw-r--r--include/linux/exynos_thermal.h59
-rw-r--r--include/linux/platform_data/exynos4_tmu.h7
-rw-r--r--include/linux/thermal.h1
25 files changed, 1353 insertions, 523 deletions
diff --git a/Documentation/thermal/cpu-cooling-api.txt b/Documentation/thermal/cpu-cooling-api.txt
new file mode 100644
index 00000000000..d30b4f276a9
--- /dev/null
+++ b/Documentation/thermal/cpu-cooling-api.txt
@@ -0,0 +1,52 @@
+CPU cooling api's How To
+===================================
+
+Written by Amit Daniel Kachhap <amit.kachhap@linaro.org>
+
+Updated: 13 Dec 2011
+
+Copyright (c) 2011 Samsung Electronics Co., Ltd(http://www.samsung.com)
+
+0. Introduction
+
+The generic cpu cooling(freq clipping, cpuhotplug) provides
+registration/unregistration api's to the user. The binding of the cooling
+devices to the trip types is left for the user. The registration api's returns
+the cooling device pointer.
+
+1. cpufreq cooling api's
+
+1.1 cpufreq registration api's
+1.1.1 struct thermal_cooling_device *cpufreq_cooling_register(
+ struct freq_pctg_table *tab_ptr, unsigned int tab_size,
+ const struct cpumask *mask_val)
+
+ This interface function registers the cpufreq cooling device with the name
+ "thermal-cpufreq".
+
+ tab_ptr: The table containing the percentage of frequency to be clipped for
+ each cooling state.
+ .freq_clip_pctg[NR_CPUS]:Percentage of frequency to be clipped for each
+ cpu.
+ .polling_interval: polling interval for this cooling state.
+ tab_size: the total number of cooling state.
+ mask_val: all the allowed cpu's where frequency clipping can happen.
+
+1.1.2 void cpufreq_cooling_unregister(void)
+
+ This interface function unregisters the "thermal-cpufreq" cooling device.
+
+
+1.2 cpuhotplug registration api's
+
+1.2.1 struct thermal_cooling_device *cpuhotplug_cooling_register(
+ const struct cpumask *mask_val)
+
+ This interface function registers the cpuhotplug cooling device with the name
+ "thermal-cpuhotplug".
+
+ mask_val: all the allowed cpu's which can be hotplugged out.
+
+1.1.2 void cpuhotplug_cooling_unregister(void)
+
+ This interface function unregisters the "thermal-cpuhotplug" cooling device.
diff --git a/Documentation/thermal/sysfs-api.txt b/Documentation/thermal/sysfs-api.txt
index b61e46f449a..5c1d44e0df5 100644
--- a/Documentation/thermal/sysfs-api.txt
+++ b/Documentation/thermal/sysfs-api.txt
@@ -184,8 +184,8 @@ trip_point_[0-*]_temp
trip_point_[0-*]_type
Strings which indicate the type of the trip point.
- E.g. it can be one of critical, hot, passive, active[0-*] for ACPI
- thermal zone.
+ E.g. it can be one of critical, hot, passive, active[0-1],
+ state-active[0-*] for ACPI thermal zone.
RO, Optional
cdev[0-*]
diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index e1efbca2a53..8a456ac3bd1 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -84,6 +84,17 @@ config EXYNOS4_DEV_DWMCI
help
Compile in platform device definitions for DWMCI
+config EXYNOS4_DEV_TMU
+ bool "Exynos4 tmu device support"
+ default n
+ depends on ARCH_EXYNOS4
+ ---help---
+ Compile in platform device definitions for TMU. This macro also
+ enables compilation hwmon base TMU driver and also allows compilation
+ of the platform device files. The platform data in this case is trip
+ temperature and some tmu h/w configurations related parameter.
+
+
config EXYNOS4_SETUP_I2C1
bool
help
@@ -290,6 +301,7 @@ config MACH_ORIGEN
select SAMSUNG_DEV_BACKLIGHT
select SAMSUNG_DEV_PWM
select EXYNOS4_DEV_PD
+ select EXYNOS4_DEV_TMU
select EXYNOS4_SETUP_FIMD0
select EXYNOS4_SETUP_SDHCI
select EXYNOS4_SETUP_USB_PHY
diff --git a/arch/arm/mach-exynos/Makefile b/arch/arm/mach-exynos/Makefile
index 59069a35e40..d2493e80ddd 100644
--- a/arch/arm/mach-exynos/Makefile
+++ b/arch/arm/mach-exynos/Makefile
@@ -44,6 +44,7 @@ obj-$(CONFIG_EXYNOS4_DEV_AHCI) += dev-ahci.o
obj-$(CONFIG_EXYNOS4_DEV_PD) += dev-pd.o
obj-$(CONFIG_EXYNOS4_DEV_SYSMMU) += dev-sysmmu.o
obj-$(CONFIG_EXYNOS4_DEV_DWMCI) += dev-dwmci.o
+obj-$(CONFIG_EXYNOS4_DEV_TMU) += dev-tmu.o
obj-$(CONFIG_EXYNOS4_SETUP_FIMC) += setup-fimc.o
obj-$(CONFIG_EXYNOS4_SETUP_FIMD0) += setup-fimd0.o
diff --git a/arch/arm/mach-exynos/clock.c b/arch/arm/mach-exynos/clock.c
index 2894f0adef5..edecc5ec584 100644
--- a/arch/arm/mach-exynos/clock.c
+++ b/arch/arm/mach-exynos/clock.c
@@ -567,6 +567,10 @@ static struct clk init_clocks_off[] = {
.enable = exynos4_clk_ip_peril_ctrl,
.ctrlbit = (1 << 15),
}, {
+ .name = "tmu_apbif",
+ .enable = exynos4_clk_ip_perir_ctrl,
+ .ctrlbit = (1 << 17),
+ }, {
.name = "keypad",
.enable = exynos4_clk_ip_perir_ctrl,
.ctrlbit = (1 << 16),
diff --git a/arch/arm/mach-exynos/dev-tmu.c b/arch/arm/mach-exynos/dev-tmu.c
new file mode 100644
index 00000000000..2e989129746
--- /dev/null
+++ b/arch/arm/mach-exynos/dev-tmu.c
@@ -0,0 +1,64 @@
+/* linux/arch/arm/mach-exynos4/dev-tmu.c
+ *
+ * Copyright 2011 by SAMSUNG
+ *
+ * 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/kernel.h>
+#include <linux/string.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/platform_data/exynos4_tmu.h>
+#include <asm/irq.h>
+
+#include <mach/irqs.h>
+#include <mach/map.h>
+#include <plat/devs.h>
+
+static struct resource exynos4_tmu_resource[] = {
+ [0] = {
+ .start = EXYNOS4_PA_TMU,
+ .end = EXYNOS4_PA_TMU + 0xFFFF - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_TMU_TRIG0,
+ .end = IRQ_TMU_TRIG0,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct exynos4_tmu_platform_data default_tmu_data = {
+ .threshold = 80,
+ .trigger_levels[0] = 2,
+ .trigger_levels[1] = 5,
+ .trigger_levels[2] = 20,
+ .trigger_levels[3] = 30,
+ .trigger_level0_en = 1,
+ .trigger_level1_en = 1,
+ .trigger_level2_en = 1,
+ .trigger_level3_en = 1,
+ .gain = 15,
+ .reference_voltage = 7,
+ .cal_type = TYPE_ONE_POINT_TRIMMING,
+ .freq_tab[0] = {
+ .freq_clip_pctg[0] = 30,
+ },
+ .freq_tab[1] = {
+ .freq_clip_pctg[0] = 99,
+ },
+ .freq_tab_count = 2,
+};
+
+struct platform_device exynos4_device_tmu = {
+ .name = "exynos4-tmu",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(exynos4_tmu_resource),
+ .resource = exynos4_tmu_resource,
+ .dev = {
+ .platform_data = &default_tmu_data,
+ },
+};
diff --git a/arch/arm/mach-exynos/include/mach/cpufreq.h b/arch/arm/mach-exynos/include/mach/cpufreq.h
new file mode 100644
index 00000000000..3df27f2d503
--- /dev/null
+++ b/arch/arm/mach-exynos/include/mach/cpufreq.h
@@ -0,0 +1,34 @@
+/* linux/arch/arm/mach-exynos/include/mach/cpufreq.h
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * EXYNOS - CPUFreq 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.
+*/
+
+enum cpufreq_level_index {
+ L0, L1, L2, L3, L4,
+ L5, L6, L7, L8, L9,
+ L10, L11, L12, L13, L14,
+ L15, L16, L17, L18, L19,
+ L20,
+};
+
+struct exynos_dvfs_info {
+ unsigned long mpll_freq_khz;
+ unsigned int pll_safe_idx;
+ unsigned int pm_lock_idx;
+ unsigned int max_support_idx;
+ unsigned int min_support_idx;
+ struct clk *cpu_clk;
+ unsigned int *volt_table;
+ struct cpufreq_frequency_table *freq_table;
+ void (*set_freq)(unsigned int, unsigned int);
+ bool (*need_apll_change)(unsigned int, unsigned int);
+};
+
+extern int exynos4210_cpufreq_init(struct exynos_dvfs_info *);
diff --git a/arch/arm/mach-exynos/include/mach/irqs.h b/arch/arm/mach-exynos/include/mach/irqs.h
index dfd4b7eecb9..d66a24b315c 100644
--- a/arch/arm/mach-exynos/include/mach/irqs.h
+++ b/arch/arm/mach-exynos/include/mach/irqs.h
@@ -125,6 +125,8 @@
#define COMBINER_GROUP(x) ((x) * MAX_IRQ_IN_COMBINER + IRQ_SPI(128))
#define COMBINER_IRQ(x, y) (COMBINER_GROUP(x) + y)
+#define IRQ_TMU_TRIG0 COMBINER_IRQ(2, 4)
+#define IRQ_TMU_TRIG1 COMBINER_IRQ(3, 4)
#define IRQ_SYSMMU_MDMA0_0 COMBINER_IRQ(4, 0)
#define IRQ_SYSMMU_SSS_0 COMBINER_IRQ(4, 1)
#define IRQ_SYSMMU_FIMC0_0 COMBINER_IRQ(4, 2)
diff --git a/arch/arm/mach-exynos/include/mach/map.h b/arch/arm/mach-exynos/include/mach/map.h
index 058541d45af..0d79b888fd9 100644
--- a/arch/arm/mach-exynos/include/mach/map.h
+++ b/arch/arm/mach-exynos/include/mach/map.h
@@ -66,6 +66,7 @@
#define EXYNOS4_PA_COREPERI 0x10500000
#define EXYNOS4_PA_TWD 0x10500600
#define EXYNOS4_PA_L2CC 0x10502000
+#define EXYNOS4_PA_TMU 0x100C0000
#define EXYNOS4_PA_MDMA 0x10810000
#define EXYNOS4_PA_PDMA0 0x12680000
diff --git a/arch/arm/mach-exynos/mach-origen.c b/arch/arm/mach-exynos/mach-origen.c
index 5561b06c38e..df89044823f 100644
--- a/arch/arm/mach-exynos/mach-origen.c
+++ b/arch/arm/mach-exynos/mach-origen.c
@@ -616,6 +616,7 @@ static struct platform_device *origen_devices[] __initdata = {
&exynos4_device_pd[PD_MFC],
&origen_device_gpiokeys,
&origen_lcd_hv070wsa,
+ &exynos4_device_tmu,
};
/* LCD Backlight data */
diff --git a/arch/arm/plat-samsung/include/plat/devs.h b/arch/arm/plat-samsung/include/plat/devs.h
index ab633c9c2ae..74cbf0d5e99 100644
--- a/arch/arm/plat-samsung/include/plat/devs.h
+++ b/arch/arm/plat-samsung/include/plat/devs.h
@@ -135,6 +135,7 @@ extern struct platform_device exynos4_device_pcm2;
extern struct platform_device exynos4_device_pd[];
extern struct platform_device exynos4_device_spdif;
extern struct platform_device exynos4_device_sysmmu;
+extern struct platform_device exynos4_device_tmu;
extern struct platform_device samsung_asoc_dma;
extern struct platform_device samsung_asoc_idma;
diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
index 72a0044c1ba..e0664fed018 100644
--- a/drivers/cpufreq/Kconfig.arm
+++ b/drivers/cpufreq/Kconfig.arm
@@ -21,12 +21,19 @@ config ARM_S5PV210_CPUFREQ
If in doubt, say N.
+config ARM_EXYNOS_CPUFREQ
+ bool "SAMSUNG EXYNOS SoCs"
+ depends on ARCH_EXYNOS
+ select ARM_EXYNOS4210_CPUFREQ if CPU_EXYNOS4210
+ default y
+ help
+ This adds the CPUFreq driver common part for Samsung
+ EXYNOS SoCs.
+
+ If in doubt, say N.
+
config ARM_EXYNOS4210_CPUFREQ
bool "Samsung EXYNOS4210"
- depends on CPU_EXYNOS4210
- default y
help
This adds the CPUFreq driver for Samsung EXYNOS4210
SoC (S5PV310 or S5PC210).
-
- If in doubt, say N.
diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
index a48bc02cd76..48cfff77cbe 100644
--- a/drivers/cpufreq/Makefile
+++ b/drivers/cpufreq/Makefile
@@ -42,6 +42,7 @@ obj-$(CONFIG_X86_CPUFREQ_NFORCE2) += cpufreq-nforce2.o
obj-$(CONFIG_UX500_SOC_DB8500) += db8500-cpufreq.o
obj-$(CONFIG_ARM_S3C64XX_CPUFREQ) += s3c64xx-cpufreq.o
obj-$(CONFIG_ARM_S5PV210_CPUFREQ) += s5pv210-cpufreq.o
+obj-$(CONFIG_ARM_EXYNOS_CPUFREQ) += exynos-cpufreq.o
obj-$(CONFIG_ARM_EXYNOS4210_CPUFREQ) += exynos4210-cpufreq.o
##################################################################################
diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c
new file mode 100644
index 00000000000..5467879ea07
--- /dev/null
+++ b/drivers/cpufreq/exynos-cpufreq.c
@@ -0,0 +1,290 @@
+/*
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * EXYNOS - CPU frequency scaling support for EXYNOS series
+ *
+ * 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/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 <linux/suspend.h>
+
+#include <mach/cpufreq.h>
+
+#include <plat/cpu.h>
+
+static struct exynos_dvfs_info *exynos_info;
+
+static struct regulator *arm_regulator;
+static struct cpufreq_freqs freqs;
+
+static unsigned int locking_frequency;
+static bool frequency_locked;
+static DEFINE_MUTEX(cpufreq_lock);
+
+int exynos_verify_speed(struct cpufreq_policy *policy)
+{
+ return cpufreq_frequency_table_verify(policy,
+ exynos_info->freq_table);
+}
+
+unsigned int exynos_getspeed(unsigned int cpu)
+{
+ return clk_get_rate(exynos_info->cpu_clk) / 1000;
+}
+
+static int exynos_target(struct cpufreq_policy *policy,
+ unsigned int target_freq,
+ unsigned int relation)
+{
+ unsigned int index, old_index;
+ unsigned int arm_volt, safe_arm_volt = 0;
+ int ret = 0;
+ struct cpufreq_frequency_table *freq_table = exynos_info->freq_table;
+ unsigned int *volt_table = exynos_info->volt_table;
+ unsigned int mpll_freq_khz = exynos_info->mpll_freq_khz;
+
+ mutex_lock(&cpufreq_lock);
+
+ freqs.old = policy->cur;
+
+ if (frequency_locked && target_freq != locking_frequency) {
+ ret = -EAGAIN;
+ goto out;
+ }
+
+ if (cpufreq_frequency_table_target(policy, freq_table,
+ freqs.old, relation, &old_index)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (cpufreq_frequency_table_target(policy, freq_table,
+ target_freq, relation, &index)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ freqs.new = freq_table[index].frequency;
+ freqs.cpu = policy->cpu;
+
+ /*
+ * ARM clock source will be changed APLL to MPLL temporary
+ * To support this level, need to control regulator for
+ * required voltage level
+ */
+ if (exynos_info->need_apll_change != NULL) {
+ if (exynos_info->need_apll_change(old_index, index) &&
+ (freq_table[index].frequency < mpll_freq_khz) &&
+ (freq_table[old_index].frequency < mpll_freq_khz))
+ safe_arm_volt = volt_table[exynos_info->pll_safe_idx];
+ }
+ arm_volt = volt_table[index];
+
+ cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
+
+ /* When the new frequency is higher than current frequency */
+ if ((freqs.new > freqs.old) && !safe_arm_volt) {
+ /* Firstly, voltage up to increase frequency */
+ regulator_set_voltage(arm_regulator, arm_volt,
+ arm_volt);
+ }
+
+ if (safe_arm_volt)
+ regulator_set_voltage(arm_regulator, safe_arm_volt,
+ safe_arm_volt);
+ if (freqs.new != freqs.old)
+ exynos_info->set_freq(old_index, index);
+
+ cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
+
+ /* When the new frequency is lower than current frequency */
+ if ((freqs.new < freqs.old) ||
+ ((freqs.new > freqs.old) && safe_arm_volt)) {
+ /* down the voltage after frequency change */
+ regulator_set_voltage(arm_regulator, arm_volt,
+ arm_volt);
+ }
+
+out:
+ mutex_unlock(&cpufreq_lock);
+
+ return ret;
+}
+
+#ifdef CONFIG_PM
+static int exynos_cpufreq_suspend(struct cpufreq_policy *policy)
+{
+ return 0;
+}
+
+static int exynos_cpufreq_resume(struct cpufreq_policy *policy)
+{
+ return 0;
+}
+#endif
+
+/**
+ * exynos_cpufreq_pm_notifier - block CPUFREQ's activities in suspend-resume
+ * context
+ * @notifier
+ * @pm_event
+ * @v
+ *
+ * While frequency_locked == true, target() ignores every frequency but
+ * locking_frequency. The locking_frequency value is the initial frequency,
+ * which is set by the bootloader. In order to eliminate possible
+ * inconsistency in clock values, we save and restore frequencies during
+ * suspend and resume and block CPUFREQ activities. Note that the standard
+ * suspend/resume cannot be used as they are too deep (syscore_ops) for
+ * regulator actions.
+ */
+static int exynos_cpufreq_pm_notifier(struct notifier_block *notifier,
+ unsigned long pm_event, void *v)
+{
+ struct cpufreq_policy *policy = cpufreq_cpu_get(0); /* boot CPU */
+ static unsigned int saved_frequency;
+ unsigned int temp;
+
+ mutex_lock(&cpufreq_lock);
+ switch (pm_event) {
+ case PM_SUSPEND_PREPARE:
+ if (frequency_locked)
+ goto out;
+
+ frequency_locked = true;
+
+ if (locking_frequency) {
+ saved_frequency = exynos_getspeed(0);
+
+ mutex_unlock(&cpufreq_lock);
+ exynos_target(policy, locking_frequency,
+ CPUFREQ_RELATION_H);
+ mutex_lock(&cpufreq_lock);
+ }
+ break;
+
+ case PM_POST_SUSPEND:
+ if (saved_frequency) {
+ /*
+ * While frequency_locked, only locking_frequency
+ * is valid for target(). In order to use
+ * saved_frequency while keeping frequency_locked,
+ * we temporarly overwrite locking_frequency.
+ */
+ temp = locking_frequency;
+ locking_frequency = saved_frequency;
+
+ mutex_unlock(&cpufreq_lock);
+ exynos_target(policy, locking_frequency,
+ CPUFREQ_RELATION_H);
+ mutex_lock(&cpufreq_lock);
+
+ locking_frequency = temp;
+ }
+ frequency_locked = false;
+ break;
+ }
+out:
+ mutex_unlock(&cpufreq_lock);
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block exynos_cpufreq_nb = {
+ .notifier_call = exynos_cpufreq_pm_notifier,
+};
+
+static int exynos_cpufreq_cpu_init(struct cpufreq_policy *policy)
+{
+ policy->cur = policy->min = policy->max = exynos_getspeed(policy->cpu);
+
+ cpufreq_frequency_table_get_attr(exynos_info->freq_table, policy->cpu);
+
+ /* set the transition latency value */
+ policy->cpuinfo.transition_latency = 100000;
+
+ /*
+ * EXYNOS4 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.
+ */
+ if (num_online_cpus() == 1) {
+ cpumask_copy(policy->related_cpus, cpu_possible_mask);
+ cpumask_copy(policy->cpus, cpu_online_mask);
+ } else {
+ cpumask_setall(policy->cpus);
+ }
+
+ return cpufreq_frequency_table_cpuinfo(policy, exynos_info->freq_table);
+}
+
+static struct cpufreq_driver exynos_driver = {
+ .flags = CPUFREQ_STICKY,
+ .verify = exynos_verify_speed,
+ .target = exynos_target,
+ .get = exynos_getspeed,
+ .init = exynos_cpufreq_cpu_init,
+ .name = "exynos_cpufreq",
+#ifdef CONFIG_PM
+ .suspend = exynos_cpufreq_suspend,
+ .resume = exynos_cpufreq_resume,
+#endif
+};
+
+static int __init exynos_cpufreq_init(void)
+{
+ int ret = -EINVAL;
+
+ exynos_info = kzalloc(sizeof(struct exynos_dvfs_info), GFP_KERNEL);
+ if (!exynos_info)
+ return -ENOMEM;
+
+ if (soc_is_exynos4210())
+ ret = exynos4210_cpufreq_init(exynos_info);
+ else
+ pr_err("%s: CPU type not found\n", __func__);
+
+ if (ret)
+ goto err_vdd_arm;
+
+ if (exynos_info->set_freq == NULL) {
+ pr_err("%s: No set_freq function (ERR)\n", __func__);
+ goto err_vdd_arm;
+ }
+
+ arm_regulator = regulator_get(NULL, "vdd_arm");
+ if (IS_ERR(arm_regulator)) {
+ pr_err("%s: failed to get resource vdd_arm\n", __func__);
+ goto err_vdd_arm;
+ }
+
+ register_pm_notifier(&exynos_cpufreq_nb);
+
+ if (cpufreq_register_driver(&exynos_driver)) {
+ pr_err("%s: failed to register cpufreq driver\n", __func__);
+ goto err_cpufreq;
+ }
+
+ return 0;
+err_cpufreq:
+ unregister_pm_notifier(&exynos_cpufreq_nb);
+
+ if (!IS_ERR(arm_regulator))
+ regulator_put(arm_regulator);
+err_vdd_arm:
+ kfree(exynos_info);
+ pr_debug("%s: failed initialization\n", __func__);
+ return -EINVAL;
+}
+late_initcall(exynos_cpufreq_init);
diff --git a/drivers/cpufreq/exynos4210-cpufreq.c b/drivers/cpufreq/exynos4210-cpufreq.c
index ab9741fab92..065da5b702f 100644
--- a/drivers/cpufreq/exynos4210-cpufreq.c
+++ b/drivers/cpufreq/exynos4210-cpufreq.c
@@ -2,61 +2,52 @@
* Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
- * EXYNOS4 - CPU frequency scaling support
+ * EXYNOS4210 - 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/module.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 <linux/notifier.h>
-#include <linux/suspend.h>
-#include <mach/map.h>
#include <mach/regs-clock.h>
-#include <mach/regs-mem.h>
+#include <mach/cpufreq.h>
-#include <plat/clock.h>
-#include <plat/pm.h>
+#define CPUFREQ_LEVEL_END L5
+
+static int max_support_idx = L0;
+static int min_support_idx = (CPUFREQ_LEVEL_END - 1);
static struct clk *cpu_clk;
static struct clk *moutcore;
static struct clk *mout_mpll;
static struct clk *mout_apll;
-static struct regulator *arm_regulator;
-static struct regulator *int_regulator;
-
-static struct cpufreq_freqs freqs;
-static unsigned int memtype;
-
-static unsigned int locking_frequency;
-static bool frequency_locked;
-static DEFINE_MUTEX(cpufreq_lock);
-
-enum exynos4_memory_type {
- DDR2 = 4,
- LPDDR2,
- DDR3,
+struct cpufreq_clkdiv {
+ unsigned int index;
+ unsigned int clkdiv;
};
-enum cpufreq_level_index {
- L0, L1, L2, L3, CPUFREQ_LEVEL_END,
+static unsigned int exynos4210_volt_table[CPUFREQ_LEVEL_END] = {
+ 1250000, 1150000, 1050000, 975000, 950000,
};
-static struct cpufreq_frequency_table exynos4_freq_table[] = {
- {L0, 1000*1000},
- {L1, 800*1000},
- {L2, 400*1000},
- {L3, 100*1000},
+
+static struct cpufreq_clkdiv exynos4210_clkdiv_table[CPUFREQ_LEVEL_END];
+
+static struct cpufreq_frequency_table exynos4210_freq_table[] = {
+ {L0, 1200*1000},
+ {L1, 1000*1000},
+ {L2, 800*1000},
+ {L3, 500*1000},
+ {L4, 200*1000},
{0, CPUFREQ_TABLE_END},
};
@@ -67,17 +58,20 @@ static unsigned int clkdiv_cpu0[CPUFREQ_LEVEL_END][7] = {
* DIVATB, DIVPCLK_DBG, DIVAPLL }
*/
- /* ARM L0: 1000MHz */
- { 0, 3, 7, 3, 3, 0, 1 },
+ /* ARM L0: 1200MHz */
+ { 0, 3, 7, 3, 4, 1, 7 },
- /* ARM L1: 800MHz */
- { 0, 3, 7, 3, 3, 0, 1 },
+ /* ARM L1: 1000MHz */
+ { 0, 3, 7, 3, 4, 1, 7 },
- /* ARM L2: 400MHz */
- { 0, 1, 3, 1, 3, 0, 1 },
+ /* ARM L2: 800MHz */
+ { 0, 3, 7, 3, 3, 1, 7 },
- /* ARM L3: 100MHz */
- { 0, 0, 1, 0, 3, 1, 1 },
+ /* ARM L3: 500MHz */
+ { 0, 3, 7, 3, 3, 1, 7 },
+
+ /* ARM L4: 200MHz */
+ { 0, 1, 3, 1, 3, 1, 0 },
};
static unsigned int clkdiv_cpu1[CPUFREQ_LEVEL_END][2] = {
@@ -86,147 +80,46 @@ static unsigned int clkdiv_cpu1[CPUFREQ_LEVEL_END][2] = {
* { DIVCOPY, DIVHPM }
*/
- /* ARM L0: 1000MHz */
- { 3, 0 },
+ /* ARM L0: 1200MHz */
+ { 5, 0 },
- /* ARM L1: 800MHz */
- { 3, 0 },
+ /* ARM L1: 1000MHz */
+ { 4, 0 },
- /* ARM L2: 400MHz */
+ /* ARM L2: 800MHz */
{ 3, 0 },
- /* ARM L3: 100MHz */
+ /* ARM L3: 500MHz */
{ 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;
+ /* ARM L4: 200MHz */
+ { 3, 0 },
};
-static struct cpufreq_voltage_table exynos4_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 exynos4210_apll_pms_table[CPUFREQ_LEVEL_END] = {
+ /* APLL FOUT L0: 1200MHz */
+ ((150 << 16) | (3 << 8) | 1),
-static unsigned int exynos4_apll_pms_table[CPUFREQ_LEVEL_END] = {
- /* APLL FOUT L0: 1000MHz */
+ /* APLL FOUT L1: 1000MHz */
((250 << 16) | (6 << 8) | 1),
- /* APLL FOUT L1: 800MHz */
+ /* APLL FOUT L2: 800MHz */
((200 << 16) | (6 << 8) | 1),
- /* APLL FOUT L2 : 400MHz */
- ((200 << 16) | (6 << 8) | 2),
+ /* APLL FOUT L3: 500MHz */
+ ((250 << 16) | (6 << 8) | 2),
- /* APLL FOUT L3: 100MHz */
- ((200 << 16) | (6 << 8) | 4),
+ /* APLL FOUT L4: 200MHz */
+ ((200 << 16) | (6 << 8) | 3),
};
-static int exynos4_verify_speed(struct cpufreq_policy *policy)
-{
- return cpufreq_frequency_table_verify(policy, exynos4_freq_table);
-}
-
-static unsigned int exynos4_getspeed(unsigned int cpu)
-{
- return clk_get_rate(cpu_clk) / 1000;
-}
-
-static void exynos4_set_clkdiv(unsigned int div_index)
+static void exynos4210_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));
+ tmp = exynos4210_clkdiv_table[div_index].clkdiv;
__raw_writel(tmp, S5P_CLKDIV_CPU);
@@ -248,83 +141,9 @@ static void exynos4_set_clkdiv(unsigned int div_index)
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 exynos4_set_apll(unsigned int index)
+static void exynos4210_set_apll(unsigned int index)
{
unsigned int tmp;
@@ -343,7 +162,7 @@ static void exynos4_set_apll(unsigned int index)
/* 3. Change PLL PMS values */
tmp = __raw_readl(S5P_APLL_CON0);
tmp &= ~((0x3ff << 16) | (0x3f << 8) | (0x7 << 0));
- tmp |= exynos4_apll_pms_table[index];
+ tmp |= exynos4210_apll_pms_table[index];
__raw_writel(tmp, S5P_APLL_CON0);
/* 4. wait_lock_time */
@@ -360,328 +179,126 @@ static void exynos4_set_apll(unsigned int index)
} while (tmp != (0x1 << S5P_CLKSRC_CPU_MUXCORE_SHIFT));
}
-static void exynos4_set_frequency(unsigned int old_index, unsigned int new_index)
+bool exynos4210_pms_change(unsigned int old_index, unsigned int new_index)
+{
+ unsigned int old_pm = (exynos4210_apll_pms_table[old_index] >> 8);
+ unsigned int new_pm = (exynos4210_apll_pms_table[new_index] >> 8);
+
+ return (old_pm == new_pm) ? 0 : 1;
+}
+
+static void exynos4210_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 == exynos4_freq_table[L0].frequency) {
- /* 1. Change the system clock divider values */
- exynos4_set_clkdiv(new_index);
-
- /* 2. Change the apll m,p,s value */
- exynos4_set_apll(new_index);
- } else {
+ if (!exynos4210_pms_change(old_index, new_index)) {
/* 1. Change the system clock divider values */
- exynos4_set_clkdiv(new_index);
+ exynos4210_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 |= (exynos4_apll_pms_table[new_index] & 0x7);
+ tmp |= (exynos4210_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 == exynos4_freq_table[L0].frequency) {
- /* 1. Change the apll m,p,s value */
- exynos4_set_apll(new_index);
-
- /* 2. Change the system clock divider values */
- exynos4_set_clkdiv(new_index);
} else {
+ /* Clock Configuration Procedure */
+ /* 1. Change the system clock divider values */
+ exynos4210_set_clkdiv(new_index);
+ /* 2. Change the apll m,p,s value */
+ exynos4210_set_apll(new_index);
+ }
+ } else if (old_index < new_index) {
+ if (!exynos4210_pms_change(old_index, new_index)) {
/* 1. Change just s value in apll m,p,s value */
tmp = __raw_readl(S5P_APLL_CON0);
tmp &= ~(0x7 << 0);
- tmp |= (exynos4_apll_pms_table[new_index] & 0x7);
+ tmp |= (exynos4210_apll_pms_table[new_index] & 0x7);
__raw_writel(tmp, S5P_APLL_CON0);
/* 2. Change the system clock divider values */
- exynos4_set_clkdiv(new_index);
+ exynos4210_set_clkdiv(new_index);
+ } else {
+ /* Clock Configuration Procedure */
+ /* 1. Change the apll m,p,s value */
+ exynos4210_set_apll(new_index);
+ /* 2. Change the system clock divider values */
+ exynos4210_set_clkdiv(new_index);
}
}
}
-static int exynos4_target(struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
-{
- unsigned int index, old_index;
- unsigned int arm_volt, int_volt;
- int err = -EINVAL;
-
- freqs.old = exynos4_getspeed(policy->cpu);
-
- mutex_lock(&cpufreq_lock);
-
- if (frequency_locked && target_freq != locking_frequency) {
- err = -EAGAIN;
- goto out;
- }
-
- if (cpufreq_frequency_table_target(policy, exynos4_freq_table,
- freqs.old, relation, &old_index))
- goto out;
-
- if (cpufreq_frequency_table_target(policy, exynos4_freq_table,
- target_freq, relation, &index))
- goto out;
-
- err = 0;
-
- freqs.new = exynos4_freq_table[index].frequency;
- freqs.cpu = policy->cpu;
-
- if (freqs.new == freqs.old)
- goto out;
-
- /* get the voltage value */
- arm_volt = exynos4_volt_table[index].arm_volt;
- int_volt = exynos4_volt_table[index].int_volt;
-
- cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
-
- /* control regulator */
- if (freqs.new > freqs.old) {
- /* Voltage up */
- regulator_set_voltage(arm_regulator, arm_volt, arm_volt);
- regulator_set_voltage(int_regulator, int_volt, int_volt);
- }
-
- /* Clock Configuration Procedure */
- exynos4_set_frequency(old_index, index);
-
- /* control regulator */
- if (freqs.new < freqs.old) {
- /* Voltage down */
- regulator_set_voltage(arm_regulator, arm_volt, arm_volt);
- regulator_set_voltage(int_regulator, int_volt, int_volt);
- }
-
- cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
-
-out:
- mutex_unlock(&cpufreq_lock);
- return err;
-}
-
-#ifdef CONFIG_PM
-/*
- * These suspend/resume are used as syscore_ops, it is already too
- * late to set regulator voltages at this stage.
- */
-static int exynos4_cpufreq_suspend(struct cpufreq_policy *policy)
-{
- return 0;
-}
-
-static int exynos4_cpufreq_resume(struct cpufreq_policy *policy)
+int exynos4210_cpufreq_init(struct exynos_dvfs_info *info)
{
- return 0;
-}
-#endif
-
-/**
- * exynos4_cpufreq_pm_notifier - block CPUFREQ's activities in suspend-resume
- * context
- * @notifier
- * @pm_event
- * @v
- *
- * While frequency_locked == true, target() ignores every frequency but
- * locking_frequency. The locking_frequency value is the initial frequency,
- * which is set by the bootloader. In order to eliminate possible
- * inconsistency in clock values, we save and restore frequencies during
- * suspend and resume and block CPUFREQ activities. Note that the standard
- * suspend/resume cannot be used as they are too deep (syscore_ops) for
- * regulator actions.
- */
-static int exynos4_cpufreq_pm_notifier(struct notifier_block *notifier,
- unsigned long pm_event, void *v)
-{
- struct cpufreq_policy *policy = cpufreq_cpu_get(0); /* boot CPU */
- static unsigned int saved_frequency;
- unsigned int temp;
-
- mutex_lock(&cpufreq_lock);
- switch (pm_event) {
- case PM_SUSPEND_PREPARE:
- if (frequency_locked)
- goto out;
- frequency_locked = true;
-
- if (locking_frequency) {
- saved_frequency = exynos4_getspeed(0);
-
- mutex_unlock(&cpufreq_lock);
- exynos4_target(policy, locking_frequency,
- CPUFREQ_RELATION_H);
- mutex_lock(&cpufreq_lock);
- }
-
- break;
- case PM_POST_SUSPEND:
-
- if (saved_frequency) {
- /*
- * While frequency_locked, only locking_frequency
- * is valid for target(). In order to use
- * saved_frequency while keeping frequency_locked,
- * we temporarly overwrite locking_frequency.
- */
- temp = locking_frequency;
- locking_frequency = saved_frequency;
-
- mutex_unlock(&cpufreq_lock);
- exynos4_target(policy, locking_frequency,
- CPUFREQ_RELATION_H);
- mutex_lock(&cpufreq_lock);
-
- locking_frequency = temp;
- }
-
- frequency_locked = false;
- break;
- }
-out:
- mutex_unlock(&cpufreq_lock);
-
- return NOTIFY_OK;
-}
-
-static struct notifier_block exynos4_cpufreq_nb = {
- .notifier_call = exynos4_cpufreq_pm_notifier,
-};
-
-static int exynos4_cpufreq_cpu_init(struct cpufreq_policy *policy)
-{
- int ret;
-
- policy->cur = policy->min = policy->max = exynos4_getspeed(policy->cpu);
-
- cpufreq_frequency_table_get_attr(exynos4_freq_table, policy->cpu);
-
- /* set the transition latency value */
- policy->cpuinfo.transition_latency = 100000;
-
- /*
- * EXYNOS4 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);
-
- ret = cpufreq_frequency_table_cpuinfo(policy, exynos4_freq_table);
- if (ret)
- return ret;
-
- cpufreq_frequency_table_get_attr(exynos4_freq_table, policy->cpu);
-
- return 0;
-}
-
-static int exynos4_cpufreq_cpu_exit(struct cpufreq_policy *policy)
-{
- cpufreq_frequency_table_put_attr(policy->cpu);
- return 0;
-}
-
-static struct freq_attr *exynos4_cpufreq_attr[] = {
- &cpufreq_freq_attr_scaling_available_freqs,
- NULL,
-};
-
-static struct cpufreq_driver exynos4_driver = {
- .flags = CPUFREQ_STICKY,
- .verify = exynos4_verify_speed,
- .target = exynos4_target,
- .get = exynos4_getspeed,
- .init = exynos4_cpufreq_cpu_init,
- .exit = exynos4_cpufreq_cpu_exit,
- .name = "exynos4_cpufreq",
- .attr = exynos4_cpufreq_attr,
-#ifdef CONFIG_PM
- .suspend = exynos4_cpufreq_suspend,
- .resume = exynos4_cpufreq_resume,
-#endif
-};
+ int i;
+ unsigned int tmp;
+ unsigned long rate;
-static int __init exynos4_cpufreq_init(void)
-{
cpu_clk = clk_get(NULL, "armclk");
if (IS_ERR(cpu_clk))
return PTR_ERR(cpu_clk);
- locking_frequency = exynos4_getspeed(0);
-
moutcore = clk_get(NULL, "moutcore");
if (IS_ERR(moutcore))
- goto out;
+ goto err_moutcore;
mout_mpll = clk_get(NULL, "mout_mpll");
if (IS_ERR(mout_mpll))
- goto out;
+ goto err_mout_mpll;
+
+ rate = clk_get_rate(mout_mpll) / 1000;
mout_apll = clk_get(NULL, "mout_apll");
if (IS_ERR(mout_apll))
- goto out;
+ goto err_mout_apll;
- 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;
- }
+ tmp = __raw_readl(S5P_CLKDIV_CPU);
- 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;
+ for (i = L0; i < CPUFREQ_LEVEL_END; i++) {
+ 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[i][0] << S5P_CLKDIV_CPU0_CORE_SHIFT) |
+ (clkdiv_cpu0[i][1] << S5P_CLKDIV_CPU0_COREM0_SHIFT) |
+ (clkdiv_cpu0[i][2] << S5P_CLKDIV_CPU0_COREM1_SHIFT) |
+ (clkdiv_cpu0[i][3] << S5P_CLKDIV_CPU0_PERIPH_SHIFT) |
+ (clkdiv_cpu0[i][4] << S5P_CLKDIV_CPU0_ATB_SHIFT) |
+ (clkdiv_cpu0[i][5] << S5P_CLKDIV_CPU0_PCLKDBG_SHIFT) |
+ (clkdiv_cpu0[i][6] << S5P_CLKDIV_CPU0_APLL_SHIFT));
+
+ exynos4210_clkdiv_table[i].clkdiv = tmp;
}
- /*
- * 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);
- }
-
- register_pm_notifier(&exynos4_cpufreq_nb);
-
- return cpufreq_register_driver(&exynos4_driver);
-
-out:
- if (!IS_ERR(cpu_clk))
- clk_put(cpu_clk);
+ info->mpll_freq_khz = rate;
+ info->pm_lock_idx = L2;
+ info->pll_safe_idx = L2;
+ info->max_support_idx = max_support_idx;
+ info->min_support_idx = min_support_idx;
+ info->cpu_clk = cpu_clk;
+ info->volt_table = exynos4210_volt_table;
+ info->freq_table = exynos4210_freq_table;
+ info->set_freq = exynos4210_set_frequency;
+ info->need_apll_change = exynos4210_pms_change;
- if (!IS_ERR(moutcore))
- clk_put(moutcore);
+ return 0;
+err_mout_apll:
if (!IS_ERR(mout_mpll))
clk_put(mout_mpll);
+err_mout_mpll:
+ if (!IS_ERR(moutcore))
+ clk_put(moutcore);
+err_moutcore:
+ if (!IS_ERR(cpu_clk))
+ clk_put(cpu_clk);
- if (!IS_ERR(mout_apll))
- clk_put(mout_apll);
-
- if (!IS_ERR(arm_regulator))
- regulator_put(arm_regulator);
-
- if (!IS_ERR(int_regulator))
- regulator_put(int_regulator);
-
- printk(KERN_ERR "%s: failed initialization\n", __func__);
-
+ pr_debug("%s: failed initialization\n", __func__);
return -EINVAL;
}
-late_initcall(exynos4_cpufreq_init);
+EXPORT_SYMBOL(exynos4210_cpufreq_init);
diff --git a/drivers/hwmon/exynos4_tmu.c b/drivers/hwmon/exynos4_tmu.c
index f2359a0093b..6912a7f7bfc 100644
--- a/drivers/hwmon/exynos4_tmu.c
+++ b/drivers/hwmon/exynos4_tmu.c
@@ -37,6 +37,9 @@
#include <linux/hwmon-sysfs.h>
#include <linux/platform_data/exynos4_tmu.h>
+#ifdef CONFIG_SAMSUNG_THERMAL_INTERFACE
+#include <linux/exynos_thermal.h>
+#endif
#define EXYNOS4_TMU_REG_TRIMINFO 0x0
#define EXYNOS4_TMU_REG_CONTROL 0x20
@@ -248,10 +251,13 @@ static void exynos4_tmu_work(struct work_struct *work)
kobject_uevent(&data->hwmon_dev->kobj, KOBJ_CHANGE);
- enable_irq(data->irq);
clk_disable(data->clk);
mutex_unlock(&data->lock);
+#ifdef CONFIG_SAMSUNG_THERMAL_INTERFACE
+ exynos4_report_trigger();
+#endif
+ enable_irq(data->irq);
}
static irqreturn_t exynos4_tmu_irq(int irq, void *id)
@@ -345,6 +351,14 @@ static const struct attribute_group exynos4_tmu_attr_group = {
.attrs = exynos4_tmu_attributes,
};
+#ifdef CONFIG_SAMSUNG_THERMAL_INTERFACE
+static struct thermal_sensor_conf exynos4_sensor_conf = {
+ .name = "exynos4-therm",
+ .read_temperature = (int (*)(void *))exynos4_tmu_read,
+};
+#endif
+/*CONFIG_SAMSUNG_THERMAL_INTERFACE*/
+
static int __devinit exynos4_tmu_probe(struct platform_device *pdev)
{
struct exynos4_tmu_data *data;
@@ -432,9 +446,20 @@ static int __devinit exynos4_tmu_probe(struct platform_device *pdev)
}
exynos4_tmu_control(pdev, true);
-
+#ifdef CONFIG_SAMSUNG_THERMAL_INTERFACE
+ (&exynos4_sensor_conf)->private_data = data;
+ (&exynos4_sensor_conf)->sensor_data = pdata;
+ ret = exynos4_register_thermal(&exynos4_sensor_conf);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register thermal interface\n");
+ goto err_hwmon_device;
+ }
+#endif
return 0;
-
+#ifdef CONFIG_SAMSUNG_THERMAL_INTERFACE
+err_hwmon_device:
+ hwmon_device_unregister(data->hwmon_dev);
+#endif
err_create_group:
sysfs_remove_group(&pdev->dev.kobj, &exynos4_tmu_attr_group);
err_clk:
@@ -458,6 +483,9 @@ static int __devexit exynos4_tmu_remove(struct platform_device *pdev)
exynos4_tmu_control(pdev, false);
+#ifdef CONFIG_SAMSUNG_THERMAL_INTERFACE
+ exynos4_unregister_thermal();
+#endif
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&pdev->dev.kobj, &exynos4_tmu_attr_group);
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index f7f71b2d310..4e8df56bb10 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -18,3 +18,22 @@ config THERMAL_HWMON
depends on THERMAL
depends on HWMON=y || HWMON=THERMAL
default y
+
+config CPU_THERMAL
+ bool "generic cpu cooling support"
+ depends on THERMAL
+ help
+ This implements the generic cpu cooling mechanism through frequency
+ reduction, cpu hotplug and any other ways of reducing temperature. An
+ ACPI version of this already exists(drivers/acpi/processor_thermal.c).
+ This will be useful for platforms using the generic thermal interface
+ and not the ACPI interface.
+ If you want this support, you should say Y or M here.
+
+config SAMSUNG_THERMAL_INTERFACE
+ bool "Samsung Thermal interface support"
+ depends on THERMAL && CPU_THERMAL
+ help
+ This is a samsung thermal interface which will be used as
+ a link between sensors and cooling devices with linux thermal
+ framework.
diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
index 31108a01c22..c67b6b222be 100644
--- a/drivers/thermal/Makefile
+++ b/drivers/thermal/Makefile
@@ -3,3 +3,5 @@
#
obj-$(CONFIG_THERMAL) += thermal_sys.o
+obj-$(CONFIG_CPU_THERMAL) += cpu_cooling.o
+obj-$(CONFIG_SAMSUNG_THERMAL_INTERFACE) += exynos_thermal.o
diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
new file mode 100644
index 00000000000..cdd148c0036
--- /dev/null
+++ b/drivers/thermal/cpu_cooling.c
@@ -0,0 +1,302 @@
+/*
+ * linux/drivers/thermal/cpu_cooling.c
+ *
+ * Copyright (C) 2011 Samsung Electronics Co., Ltd(http://www.samsung.com)
+ * Copyright (C) 2011 Amit Daniel <amit.kachhap@linaro.org>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/thermal.h>
+#include <linux/platform_device.h>
+#include <linux/cpufreq.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/cpu.h>
+#include <linux/cpu_cooling.h>
+
+#ifdef CONFIG_CPU_FREQ
+struct cpufreq_cooling_device {
+ struct thermal_cooling_device *cool_dev;
+ struct freq_pctg_table *tab_ptr;
+ unsigned int tab_size;
+ unsigned int cpufreq_state;
+ const struct cpumask *allowed_cpus;
+};
+
+static struct cpufreq_cooling_device *cpufreq_device;
+
+/*Below codes defines functions to be used for cpufreq as cooling device*/
+static bool is_cpufreq_valid(int cpu)
+{
+ struct cpufreq_policy policy;
+ if (!cpufreq_get_policy(&policy, cpu))
+ return true;
+ return false;
+}
+
+static int cpufreq_apply_cooling(int cooling_state)
+{
+ int cpuid, this_cpu = smp_processor_id();
+
+ if (!is_cpufreq_valid(this_cpu))
+ return 0;
+
+ if (cooling_state > cpufreq_device->tab_size)
+ return -EINVAL;
+
+ /*Check if last cooling level is same as current cooling level*/
+ if (cpufreq_device->cpufreq_state == cooling_state)
+ return 0;
+
+ cpufreq_device->cpufreq_state = cooling_state;
+
+ for_each_cpu(cpuid, cpufreq_device->allowed_cpus) {
+ if (is_cpufreq_valid(cpuid))
+ cpufreq_update_policy(cpuid);
+ }
+
+ return 0;
+}
+
+static int thermal_cpufreq_notifier(struct notifier_block *nb,
+ unsigned long event, void *data)
+{
+ struct cpufreq_policy *policy = data;
+ struct freq_pctg_table *th_table;
+ unsigned long max_freq = 0;
+ unsigned int cpu = policy->cpu, th_pctg = 0, level;
+
+ if (event != CPUFREQ_ADJUST)
+ return 0;
+
+ level = cpufreq_device->cpufreq_state;
+
+ if (level > 0) {
+ th_table =
+ &(cpufreq_device->tab_ptr[level - 1]);
+ th_pctg = th_table->freq_clip_pctg[cpu];
+ }
+
+ max_freq =
+ (policy->cpuinfo.max_freq * (100 - th_pctg)) / 100;
+
+ cpufreq_verify_within_limits(policy, 0, max_freq);
+
+ return 0;
+}
+
+/*
+ * cpufreq cooling device callback functions
+ */
+static int cpufreq_get_max_state(struct thermal_cooling_device *cdev,
+ unsigned long *state)
+{
+ *state = cpufreq_device->tab_size;
+ return 0;
+}
+
+static int cpufreq_get_cur_state(struct thermal_cooling_device *cdev,
+ unsigned long *state)
+{
+ *state = cpufreq_device->cpufreq_state;
+ return 0;
+}
+
+/*This cooling may be as PASSIVE/STATE_ACTIVE type*/
+static int cpufreq_set_cur_state(struct thermal_cooling_device *cdev,
+ unsigned long state)
+{
+ cpufreq_apply_cooling(state);
+ return 0;
+}
+
+/* bind cpufreq callbacks to cpufreq cooling device */
+static struct thermal_cooling_device_ops cpufreq_cooling_ops = {
+ .get_max_state = cpufreq_get_max_state,
+ .get_cur_state = cpufreq_get_cur_state,
+ .set_cur_state = cpufreq_set_cur_state,
+};
+
+static struct notifier_block thermal_cpufreq_notifier_block = {
+ .notifier_call = thermal_cpufreq_notifier,
+};
+
+struct thermal_cooling_device *cpufreq_cooling_register(
+ struct freq_pctg_table *tab_ptr, unsigned int tab_size,
+ const struct cpumask *mask_val)
+{
+ struct thermal_cooling_device *cool_dev;
+
+ if (tab_ptr == NULL || tab_size == 0)
+ return ERR_PTR(-EINVAL);
+
+ cpufreq_device =
+ kzalloc(sizeof(struct cpufreq_cooling_device), GFP_KERNEL);
+
+ if (!cpufreq_device)
+ return ERR_PTR(-ENOMEM);
+
+ cool_dev = thermal_cooling_device_register("thermal-cpufreq", NULL,
+ &cpufreq_cooling_ops);
+ if (!cool_dev) {
+ kfree(cpufreq_device);
+ return ERR_PTR(-EINVAL);
+ }
+
+ cpufreq_device->tab_ptr = tab_ptr;
+ cpufreq_device->tab_size = tab_size;
+ cpufreq_device->cool_dev = cool_dev;
+ cpufreq_device->allowed_cpus = mask_val;
+
+ cpufreq_register_notifier(&thermal_cpufreq_notifier_block,
+ CPUFREQ_POLICY_NOTIFIER);
+ return cool_dev;
+}
+EXPORT_SYMBOL(cpufreq_cooling_register);
+
+void cpufreq_cooling_unregister(void)
+{
+ cpufreq_unregister_notifier(&thermal_cpufreq_notifier_block,
+ CPUFREQ_POLICY_NOTIFIER);
+ thermal_cooling_device_unregister(cpufreq_device->cool_dev);
+ kfree(cpufreq_device);
+}
+EXPORT_SYMBOL(cpufreq_cooling_unregister);
+#else /*!CONFIG_CPU_FREQ*/
+struct thermal_cooling_device *cpufreq_cooling_register(
+ struct freq_pctg_table *tab_ptr, unsigned int tab_size)
+{
+ return NULL;
+}
+EXPORT_SYMBOL(cpufreq_cooling_register);
+void cpufreq_cooling_unregister(void)
+{
+ return;
+}
+EXPORT_SYMBOL(cpufreq_cooling_unregister);
+#endif /*CONFIG_CPU_FREQ*/
+
+#ifdef CONFIG_HOTPLUG_CPU
+
+struct hotplug_cooling_device {
+ struct thermal_cooling_device *cool_dev;
+ unsigned int hotplug_state;
+ const struct cpumask *allowed_cpus;
+};
+static struct hotplug_cooling_device *hotplug_device;
+
+/*
+ * cpu hotplug cooling device callback functions
+ */
+static int cpuhotplug_get_max_state(struct thermal_cooling_device *cdev,
+ unsigned long *state)
+{
+ *state = 1;
+ return 0;
+}
+
+static int cpuhotplug_get_cur_state(struct thermal_cooling_device *cdev,
+ unsigned long *state)
+{
+ /*This cooling device may be of type ACTIVE, so state field
+ can be 0 or 1*/
+ *state = hotplug_device->hotplug_state;
+ return 0;
+}
+
+/*This cooling may be as PASSIVE/STATE_ACTIVE type*/
+static int cpuhotplug_set_cur_state(struct thermal_cooling_device *cdev,
+ unsigned long state)
+{
+ int cpuid, this_cpu = smp_processor_id();
+
+ if (hotplug_device->hotplug_state == state)
+ return 0;
+
+ /*This cooling device may be of type ACTIVE, so state field
+ can be 0 or 1*/
+ if (state == 1) {
+ for_each_cpu(cpuid, hotplug_device->allowed_cpus) {
+ if (cpu_online(cpuid) && (cpuid != this_cpu))
+ cpu_down(cpuid);
+ }
+ } else if (state == 0) {
+ for_each_cpu(cpuid, hotplug_device->allowed_cpus) {
+ if (!cpu_online(cpuid) && (cpuid != this_cpu))
+ cpu_up(cpuid);
+ }
+ } else
+ return -EINVAL;
+
+ hotplug_device->hotplug_state = state;
+
+ return 0;
+}
+/* bind hotplug callbacks to cpu hotplug cooling device */
+static struct thermal_cooling_device_ops cpuhotplug_cooling_ops = {
+ .get_max_state = cpuhotplug_get_max_state,
+ .get_cur_state = cpuhotplug_get_cur_state,
+ .set_cur_state = cpuhotplug_set_cur_state,
+};
+
+struct thermal_cooling_device *cpuhotplug_cooling_register(
+ const struct cpumask *mask_val)
+{
+ struct thermal_cooling_device *cool_dev;
+
+ hotplug_device =
+ kzalloc(sizeof(struct hotplug_cooling_device), GFP_KERNEL);
+
+ if (!hotplug_device)
+ return ERR_PTR(-ENOMEM);
+
+ cool_dev = thermal_cooling_device_register("thermal-cpuhotplug", NULL,
+ &cpuhotplug_cooling_ops);
+ if (!cool_dev) {
+ kfree(hotplug_device);
+ return ERR_PTR(-EINVAL);
+ }
+
+ hotplug_device->cool_dev = cool_dev;
+ hotplug_device->hotplug_state = 0;
+ hotplug_device->allowed_cpus = mask_val;
+
+ return cool_dev;
+}
+EXPORT_SYMBOL(cpuhotplug_cooling_register);
+
+void cpuhotplug_cooling_unregister(void)
+{
+ thermal_cooling_device_unregister(hotplug_device->cool_dev);
+ kfree(hotplug_device);
+}
+EXPORT_SYMBOL(cpuhotplug_cooling_unregister);
+#else /*!CONFIG_HOTPLUG_CPU*/
+struct thermal_cooling_device *cpuhotplug_cooling_register(
+ const struct cpumask *mask_val)
+{
+ return NULL;
+}
+EXPORT_SYMBOL(cpuhotplug_cooling_register);
+void cpuhotplug_cooling_unregister(void)
+{
+ return;
+}
+EXPORT_SYMBOL(cpuhotplug_cooling_unregister);
+#endif /*CONFIG_HOTPLUG_CPU*/
diff --git a/drivers/thermal/exynos_thermal.c b/drivers/thermal/exynos_thermal.c
new file mode 100644
index 00000000000..7c916dbe067
--- /dev/null
+++ b/drivers/thermal/exynos_thermal.c
@@ -0,0 +1,255 @@
+/* linux/drivers/thermal/exynos_thermal.c
+ *
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * 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/kernel.h>
+#include <linux/module.h>
+#include <linux/thermal.h>
+#include <linux/platform_device.h>
+#include <linux/cpufreq.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/cpu_cooling.h>
+#include <linux/platform_data/exynos4_tmu.h>
+#include <linux/exynos_thermal.h>
+
+struct exynos4_thermal_zone {
+ unsigned int idle_interval;
+ unsigned int active_interval;
+ struct thermal_zone_device *therm_dev;
+ struct thermal_cooling_device *cool_dev;
+ struct platform_device *exynos4_dev;
+ struct thermal_sensor_conf *sensor_conf;
+ struct exynos4_tmu_platform_data *sensor_data;
+};
+
+static struct exynos4_thermal_zone *th_zone;
+
+static int exynos4_get_mode(struct thermal_zone_device *thermal,
+ enum thermal_device_mode *mode)
+{
+ if (th_zone->sensor_conf) {
+ pr_info("Temperature sensor not initialised\n");
+ *mode = THERMAL_DEVICE_DISABLED;
+ } else
+ *mode = THERMAL_DEVICE_ENABLED;
+ return 0;
+}
+
+static int exynos4_set_mode(struct thermal_zone_device *thermal,
+ enum thermal_device_mode mode)
+{
+ if (!th_zone->therm_dev) {
+ pr_notice("thermal zone not registered\n");
+ return 0;
+ }
+ if (mode == THERMAL_DEVICE_ENABLED)
+ th_zone->therm_dev->polling_delay =
+ th_zone->active_interval*1000;
+ else
+ th_zone->therm_dev->polling_delay =
+ th_zone->idle_interval*1000;
+
+ thermal_zone_device_update(th_zone->therm_dev);
+ pr_info("thermal polling set for duration=%d sec\n",
+ th_zone->therm_dev->polling_delay/1000);
+ return 0;
+}
+
+/*This may be called from interrupt based temperature sensor*/
+void exynos4_report_trigger(void)
+{
+ unsigned int th_temp = th_zone->sensor_data->threshold;
+ unsigned int monitor_temp = th_temp +
+ th_zone->sensor_data->trigger_levels[1];
+
+ thermal_zone_device_update(th_zone->therm_dev);
+
+ if (th_zone->therm_dev->last_temperature > monitor_temp)
+ th_zone->therm_dev->polling_delay =
+ th_zone->active_interval*1000;
+ else
+ th_zone->therm_dev->polling_delay =
+ th_zone->idle_interval*1000;
+}
+
+static int exynos4_get_trip_type(struct thermal_zone_device *thermal, int trip,
+ enum thermal_trip_type *type)
+{
+ if (trip == 0 || trip == 1)
+ *type = THERMAL_TRIP_STATE_ACTIVE;
+ else if (trip == 2)
+ *type = THERMAL_TRIP_CRITICAL;
+ else
+ return -EINVAL;
+
+ return 0;
+}
+
+static int exynos4_get_trip_temp(struct thermal_zone_device *thermal, int trip,
+ unsigned long *temp)
+{
+ unsigned int th_temp = th_zone->sensor_data->threshold;
+
+ /*Monitor zone*/
+ if (trip == 0)
+ *temp = th_temp + th_zone->sensor_data->trigger_levels[1];
+ /*Warn zone*/
+ else if (trip == 1)
+ *temp = th_temp + th_zone->sensor_data->trigger_levels[2];
+ /*Panic zone*/
+ else if (trip == 2)
+ *temp = th_temp + th_zone->sensor_data->trigger_levels[3];
+ else
+ return -EINVAL;
+ /*convert the temperature into millicelsius*/
+ *temp = *temp * 1000;
+ return 0;
+}
+
+static int exynos4_get_crit_temp(struct thermal_zone_device *thermal,
+ unsigned long *temp)
+{
+ unsigned int th_temp = th_zone->sensor_data->threshold;
+ /*Panic zone*/
+ *temp = th_temp + th_zone->sensor_data->trigger_levels[3];
+ /*convert the temperature into millicelsius*/
+ *temp = *temp * 1000;
+ return 0;
+}
+
+static int exynos4_bind(struct thermal_zone_device *thermal,
+ struct thermal_cooling_device *cdev)
+{
+ /* if the cooling device is the one from exynos4 bind it */
+ if (cdev != th_zone->cool_dev)
+ return 0;
+
+ if (thermal_zone_bind_cooling_device(thermal, 0, cdev)) {
+ pr_err("error binding cooling dev\n");
+ return -EINVAL;
+ }
+ if (thermal_zone_bind_cooling_device(thermal, 1, cdev)) {
+ pr_err("error binding cooling dev\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int exynos4_unbind(struct thermal_zone_device *thermal,
+ struct thermal_cooling_device *cdev)
+{
+ if (cdev != th_zone->cool_dev)
+ return 0;
+ if (thermal_zone_unbind_cooling_device(thermal, 0, cdev)) {
+ pr_err("error unbinding cooling dev\n");
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int exynos4_get_temp(struct thermal_zone_device *thermal,
+ unsigned long *temp)
+{
+ void *data;
+
+ if (!th_zone->sensor_conf) {
+ pr_info("Temperature sensor not initialised\n");
+ return -EINVAL;
+ }
+ data = th_zone->sensor_conf->private_data;
+ *temp = th_zone->sensor_conf->read_temperature(data);
+ /*convert the temperature into millicelsius*/
+ *temp = *temp * 1000;
+ return 0;
+}
+
+/* bind callback functions to thermalzone */
+static struct thermal_zone_device_ops exynos4_dev_ops = {
+ .bind = exynos4_bind,
+ .unbind = exynos4_unbind,
+ .get_temp = exynos4_get_temp,
+ .get_mode = exynos4_get_mode,
+ .set_mode = exynos4_set_mode,
+ .get_trip_type = exynos4_get_trip_type,
+ .get_trip_temp = exynos4_get_trip_temp,
+ .get_crit_temp = exynos4_get_crit_temp,
+};
+
+int exynos4_register_thermal(struct thermal_sensor_conf *sensor_conf)
+{
+ int ret;
+
+ if (!sensor_conf) {
+ pr_err("Temperature sensor not initialised\n");
+ return -EINVAL;
+ }
+
+ th_zone = kzalloc(sizeof(struct exynos4_thermal_zone), GFP_KERNEL);
+ if (!th_zone) {
+ ret = -ENOMEM;
+ goto err_unregister;
+ }
+
+ th_zone->sensor_conf = sensor_conf;
+
+ th_zone->sensor_data = sensor_conf->sensor_data;
+ if (!th_zone->sensor_data) {
+ pr_err("Temperature sensor data not initialised\n");
+ ret = -EINVAL;
+ goto err_unregister;
+ }
+
+ th_zone->cool_dev = cpufreq_cooling_register(
+ (struct freq_pctg_table *)th_zone->sensor_data->freq_tab,
+ th_zone->sensor_data->freq_tab_count, cpumask_of(0));
+
+ if (IS_ERR(th_zone->cool_dev)) {
+ pr_err("Failed to register cpufreq cooling device\n");
+ ret = -EINVAL;
+ goto err_unregister;
+ }
+
+ th_zone->therm_dev = thermal_zone_device_register(sensor_conf->name,
+ 3, NULL, &exynos4_dev_ops, 0, 0, 0, 1000);
+ if (IS_ERR(th_zone->therm_dev)) {
+ pr_err("Failed to register thermal zone device\n");
+ ret = -EINVAL;
+ goto err_unregister;
+ }
+
+ th_zone->active_interval = 1;
+ th_zone->idle_interval = 10;
+
+ exynos4_set_mode(th_zone->therm_dev, THERMAL_DEVICE_DISABLED);
+
+ pr_info("Exynos: Kernel Thermal management registered\n");
+
+ return 0;
+
+err_unregister:
+ exynos4_unregister_thermal();
+ return ret;
+}
+EXPORT_SYMBOL(exynos4_register_thermal);
+
+void exynos4_unregister_thermal(void)
+{
+ if (th_zone && th_zone->cool_dev)
+ cpufreq_cooling_unregister();
+
+ if (th_zone && th_zone->therm_dev)
+ thermal_zone_device_unregister(th_zone->therm_dev);
+
+ kfree(th_zone);
+
+ pr_info("Exynos: Kernel Thermal management unregistered\n");
+}
+EXPORT_SYMBOL(exynos4_unregister_thermal);
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
index dd9a5743fa9..72b1ab31029 100644
--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c
@@ -192,6 +192,8 @@ trip_point_type_show(struct device *dev, struct device_attribute *attr,
return sprintf(buf, "passive\n");
case THERMAL_TRIP_ACTIVE:
return sprintf(buf, "active\n");
+ case THERMAL_TRIP_STATE_ACTIVE:
+ return sprintf(buf, "state-active\n");
default:
return sprintf(buf, "unknown\n");
}
@@ -1035,7 +1037,7 @@ EXPORT_SYMBOL(thermal_cooling_device_unregister);
void thermal_zone_device_update(struct thermal_zone_device *tz)
{
int count, ret = 0;
- long temp, trip_temp;
+ long temp, trip_temp, max_state, last_trip_change = 0;
enum thermal_trip_type trip_type;
struct thermal_cooling_device_instance *instance;
struct thermal_cooling_device *cdev;
@@ -1086,6 +1088,29 @@ void thermal_zone_device_update(struct thermal_zone_device *tz)
cdev->ops->set_cur_state(cdev, 0);
}
break;
+ case THERMAL_TRIP_STATE_ACTIVE:
+ list_for_each_entry(instance, &tz->cooling_devices,
+ node) {
+ if (instance->trip != count)
+ continue;
+
+ if (temp <= last_trip_change)
+ continue;
+
+ cdev = instance->cdev;
+ cdev->ops->get_max_state(cdev, &max_state);
+
+ if ((temp >= trip_temp) &&
+ ((count + 1) <= max_state))
+ cdev->ops->set_cur_state(cdev,
+ count + 1);
+ else if ((temp < trip_temp) &&
+ (count <= max_state))
+ cdev->ops->set_cur_state(cdev, count);
+
+ last_trip_change = trip_temp;
+ }
+ break;
case THERMAL_TRIP_PASSIVE:
if (temp >= trip_temp || tz->passive)
thermal_zone_device_passive(tz, temp,
diff --git a/include/linux/cpu_cooling.h b/include/linux/cpu_cooling.h
new file mode 100644
index 00000000000..0c573751f57
--- /dev/null
+++ b/include/linux/cpu_cooling.h
@@ -0,0 +1,45 @@
+/*
+ * linux/include/linux/cpu_cooling.h
+ *
+ * Copyright (C) 2011 Samsung Electronics Co., Ltd(http://www.samsung.com)
+ * Copyright (C) 2011 Amit Daniel <amit.kachhap@linaro.org>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#ifndef __CPU_COOLING_H__
+#define __CPU_COOLING_H__
+
+#include <linux/thermal.h>
+
+struct freq_pctg_table {
+ unsigned int freq_clip_pctg[NR_CPUS];
+ unsigned int polling_interval;
+};
+
+extern struct thermal_cooling_device *cpufreq_cooling_register(
+ struct freq_pctg_table *tab_ptr, unsigned int tab_size,
+ const struct cpumask *mask_val);
+
+extern void cpufreq_cooling_unregister(void);
+
+extern struct thermal_cooling_device *cpuhotplug_cooling_register(
+ const struct cpumask *mask_val);
+
+extern void cpuhotplug_cooling_unregister(void);
+
+#endif /* __CPU_COOLING_H__ */
diff --git a/include/linux/exynos_thermal.h b/include/linux/exynos_thermal.h
new file mode 100644
index 00000000000..de7195b3a18
--- /dev/null
+++ b/include/linux/exynos_thermal.h
@@ -0,0 +1,59 @@
+/* linux/include/linux/exynos_thermal.h
+ *
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * 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 THERMAL_INTERFACE_H
+#define THERMAL_INTERFACE_H
+/* CPU Zone information */
+
+#define SENSOR_NAME_LEN 16
+
+#define PANIC_ZONE 4
+#define WARN_ZONE 3
+#define MONITOR_ZONE 2
+#define SAFE_ZONE 1
+#define NO_ACTION 0
+
+/**
+ * struct exynos4_tmu_platform_data
+ * @name: name of the temperature sensor
+ * @read_temperature: A function pointer to read temperature info
+ * @private_data: Temperature sensor private data
+ * @sensor_data: Sensor specific information like trigger temperature, level
+ */
+struct thermal_sensor_conf {
+ char name[SENSOR_NAME_LEN];
+ int (*read_temperature)(void *data);
+ void *private_data;
+ void *sensor_data;
+};
+
+/**
+ * exynos4_register_thermal: Register to the exynos thermal interface.
+ * @sensor_conf: Structure containing temperature sensor information
+ *
+ * returns zero on success, else negative errno.
+ */
+int exynos4_register_thermal(struct thermal_sensor_conf *sensor_conf);
+
+/**
+ * exynos4_unregister_thermal: Un-register from the exynos thermal interface.
+ *
+ * return not applicable.
+ */
+void exynos4_unregister_thermal(void);
+
+/**
+ * exynos4_report_trigger: Report any trigger level crossed in the
+ * temperature sensor. This may be useful to take any cooling action.
+ *
+ * return not applicable.
+ */
+extern void exynos4_report_trigger(void);
+#endif
diff --git a/include/linux/platform_data/exynos4_tmu.h b/include/linux/platform_data/exynos4_tmu.h
index 39e038cca59..642c508aa28 100644
--- a/include/linux/platform_data/exynos4_tmu.h
+++ b/include/linux/platform_data/exynos4_tmu.h
@@ -21,6 +21,7 @@
#ifndef _LINUX_EXYNOS4_TMU_H
#define _LINUX_EXYNOS4_TMU_H
+#include <linux/cpu_cooling.h>
enum calibration_type {
TYPE_ONE_POINT_TRIMMING,
@@ -64,6 +65,9 @@ enum calibration_type {
* in the positive-TC generator block
* 0 <= reference_voltage <= 31
* @cal_type: calibration type for temperature
+ * @freq_pctg_table: Table representing frequency reduction percentage.
+ * @freq_tab_count: Count of the above table as frequency reduction may
+ * applicable to only some of the trigger levels.
*
* This structure is required for configuration of exynos4_tmu driver.
*/
@@ -79,5 +83,8 @@ struct exynos4_tmu_platform_data {
u8 reference_voltage;
enum calibration_type cal_type;
+
+ struct freq_pctg_table freq_tab[4];
+ unsigned int freq_tab_count;
};
#endif /* _LINUX_EXYNOS4_TMU_H */
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 47b4a27e6e9..d7d0a27d1a0 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -42,6 +42,7 @@ enum thermal_trip_type {
THERMAL_TRIP_PASSIVE,
THERMAL_TRIP_HOT,
THERMAL_TRIP_CRITICAL,
+ THERMAL_TRIP_STATE_ACTIVE,
};
struct thermal_zone_device_ops {