PM / devfreq: exynos: Remove unused exynos4/5 busfreq driver

This patch removes the unused exynos4/5 busfreq driver. Instead,
generic exynos-bus frequency driver support the all Exynos SoCs.
Signed-off-by: NChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: NMyungJoo Ham <myungjoo.ham@samsung.com>
Acked-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>

drivers/devfreq/Kconfig

@@ -90,28 +90,6 @@ config ARM_EXYNOS_BUS_DEVFREQ
 	  and adjusts the operating frequencies and voltages with OPP support.
 	  This does not yet operate with optimal voltages.
 
-config ARM_EXYNOS4_BUS_DEVFREQ
-	bool "ARM Exynos4210/4212/4412 Memory Bus DEVFREQ Driver"
-	depends on (CPU_EXYNOS4210 || SOC_EXYNOS4212 || SOC_EXYNOS4412) && !ARCH_MULTIPLATFORM
-	select DEVFREQ_GOV_SIMPLE_ONDEMAND
-	select PM_OPP
-	help
-	  This adds the DEVFREQ driver for Exynos4210 memory bus (vdd_int)
-	  and Exynos4212/4412 memory interface and bus (vdd_mif + vdd_int).
-	  It reads PPMU counters of memory controllers and adjusts
-	  the operating frequencies and voltages with OPP support.
-	  This does not yet operate with optimal voltages.
-
-config ARM_EXYNOS5_BUS_DEVFREQ
-	tristate "ARM Exynos5250 Bus DEVFREQ Driver"
-	depends on SOC_EXYNOS5250
-	select DEVFREQ_GOV_SIMPLE_ONDEMAND
-	select PM_OPP
-	help
-	  This adds the DEVFREQ driver for Exynos5250 bus interface (vdd_int).
-	  It reads PPMU counters of memory controllers and adjusts the
-	  operating frequencies and voltages with OPP support.
-
 config ARM_TEGRA_DEVFREQ
        tristate "Tegra DEVFREQ Driver"
        depends on ARCH_TEGRA_124_SOC

drivers/devfreq/Makefile

@@ -8,8 +8,6 @@ obj-$(CONFIG_DEVFREQ_GOV_PASSIVE)	+= governor_passive.o
 
 # DEVFREQ Drivers
 obj-$(CONFIG_ARM_EXYNOS_BUS_DEVFREQ)	+= exynos-bus.o
-obj-$(CONFIG_ARM_EXYNOS4_BUS_DEVFREQ)	+= exynos/
-obj-$(CONFIG_ARM_EXYNOS5_BUS_DEVFREQ)	+= exynos/
 obj-$(CONFIG_ARM_TEGRA_DEVFREQ)		+= tegra-devfreq.o
 
 # DEVFREQ Event Drivers

drivers/devfreq/exynos/Makefile

-# Exynos DEVFREQ Drivers
-obj-$(CONFIG_ARM_EXYNOS4_BUS_DEVFREQ)	+= exynos_ppmu.o exynos4_bus.o
-obj-$(CONFIG_ARM_EXYNOS5_BUS_DEVFREQ)	+= exynos_ppmu.o exynos5_bus.o

drivers/devfreq/exynos/exynos4_bus.h

-/*
- * Copyright (c) 2013 Samsung Electronics Co., Ltd.
- *		http://www.samsung.com/
- *
- * EXYNOS4 BUS header
- *
- * 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 __DEVFREQ_EXYNOS4_BUS_H
-#define __DEVFREQ_EXYNOS4_BUS_H __FILE__
-
-#include <mach/map.h>
-
-#define EXYNOS4_CLKDIV_LEFTBUS			(S5P_VA_CMU + 0x04500)
-#define EXYNOS4_CLKDIV_STAT_LEFTBUS		(S5P_VA_CMU + 0x04600)
-
-#define EXYNOS4_CLKDIV_RIGHTBUS			(S5P_VA_CMU + 0x08500)
-#define EXYNOS4_CLKDIV_STAT_RIGHTBUS		(S5P_VA_CMU + 0x08600)
-
-#define EXYNOS4_CLKDIV_TOP			(S5P_VA_CMU + 0x0C510)
-#define EXYNOS4_CLKDIV_CAM			(S5P_VA_CMU + 0x0C520)
-#define EXYNOS4_CLKDIV_MFC			(S5P_VA_CMU + 0x0C528)
-
-#define EXYNOS4_CLKDIV_STAT_TOP			(S5P_VA_CMU + 0x0C610)
-#define EXYNOS4_CLKDIV_STAT_MFC			(S5P_VA_CMU + 0x0C628)
-
-#define EXYNOS4210_CLKGATE_IP_IMAGE		(S5P_VA_CMU + 0x0C930)
-#define EXYNOS4212_CLKGATE_IP_IMAGE		(S5P_VA_CMU + 0x04930)
-
-#define EXYNOS4_CLKDIV_DMC0			(S5P_VA_CMU + 0x10500)
-#define EXYNOS4_CLKDIV_DMC1			(S5P_VA_CMU + 0x10504)
-#define EXYNOS4_CLKDIV_STAT_DMC0		(S5P_VA_CMU + 0x10600)
-#define EXYNOS4_CLKDIV_STAT_DMC1		(S5P_VA_CMU + 0x10604)
-
-#define EXYNOS4_DMC_PAUSE_CTRL			(S5P_VA_CMU + 0x11094)
-#define EXYNOS4_DMC_PAUSE_ENABLE		(1 << 0)
-
-#define EXYNOS4_CLKDIV_DMC0_ACP_SHIFT		(0)
-#define EXYNOS4_CLKDIV_DMC0_ACP_MASK		(0x7 << EXYNOS4_CLKDIV_DMC0_ACP_SHIFT)
-#define EXYNOS4_CLKDIV_DMC0_ACPPCLK_SHIFT	(4)
-#define EXYNOS4_CLKDIV_DMC0_ACPPCLK_MASK	(0x7 << EXYNOS4_CLKDIV_DMC0_ACPPCLK_SHIFT)
-#define EXYNOS4_CLKDIV_DMC0_DPHY_SHIFT		(8)
-#define EXYNOS4_CLKDIV_DMC0_DPHY_MASK		(0x7 << EXYNOS4_CLKDIV_DMC0_DPHY_SHIFT)
-#define EXYNOS4_CLKDIV_DMC0_DMC_SHIFT		(12)
-#define EXYNOS4_CLKDIV_DMC0_DMC_MASK		(0x7 << EXYNOS4_CLKDIV_DMC0_DMC_SHIFT)
-#define EXYNOS4_CLKDIV_DMC0_DMCD_SHIFT		(16)
-#define EXYNOS4_CLKDIV_DMC0_DMCD_MASK		(0x7 << EXYNOS4_CLKDIV_DMC0_DMCD_SHIFT)
-#define EXYNOS4_CLKDIV_DMC0_DMCP_SHIFT		(20)
-#define EXYNOS4_CLKDIV_DMC0_DMCP_MASK		(0x7 << EXYNOS4_CLKDIV_DMC0_DMCP_SHIFT)
-#define EXYNOS4_CLKDIV_DMC0_COPY2_SHIFT		(24)
-#define EXYNOS4_CLKDIV_DMC0_COPY2_MASK		(0x7 << EXYNOS4_CLKDIV_DMC0_COPY2_SHIFT)
-#define EXYNOS4_CLKDIV_DMC0_CORETI_SHIFT	(28)
-#define EXYNOS4_CLKDIV_DMC0_CORETI_MASK		(0x7 << EXYNOS4_CLKDIV_DMC0_CORETI_SHIFT)
-
-#define EXYNOS4_CLKDIV_DMC1_G2D_ACP_SHIFT	(0)
-#define EXYNOS4_CLKDIV_DMC1_G2D_ACP_MASK	(0xf << EXYNOS4_CLKDIV_DMC1_G2D_ACP_SHIFT)
-#define EXYNOS4_CLKDIV_DMC1_C2C_SHIFT		(4)
-#define EXYNOS4_CLKDIV_DMC1_C2C_MASK		(0x7 << EXYNOS4_CLKDIV_DMC1_C2C_SHIFT)
-#define EXYNOS4_CLKDIV_DMC1_PWI_SHIFT		(8)
-#define EXYNOS4_CLKDIV_DMC1_PWI_MASK		(0xf << EXYNOS4_CLKDIV_DMC1_PWI_SHIFT)
-#define EXYNOS4_CLKDIV_DMC1_C2CACLK_SHIFT	(12)
-#define EXYNOS4_CLKDIV_DMC1_C2CACLK_MASK	(0x7 << EXYNOS4_CLKDIV_DMC1_C2CACLK_SHIFT)
-#define EXYNOS4_CLKDIV_DMC1_DVSEM_SHIFT		(16)
-#define EXYNOS4_CLKDIV_DMC1_DVSEM_MASK		(0x7f << EXYNOS4_CLKDIV_DMC1_DVSEM_SHIFT)
-#define EXYNOS4_CLKDIV_DMC1_DPM_SHIFT		(24)
-#define EXYNOS4_CLKDIV_DMC1_DPM_MASK		(0x7f << EXYNOS4_CLKDIV_DMC1_DPM_SHIFT)
-
-#define EXYNOS4_CLKDIV_MFC_SHIFT		(0)
-#define EXYNOS4_CLKDIV_MFC_MASK			(0x7 << EXYNOS4_CLKDIV_MFC_SHIFT)
-
-#define EXYNOS4_CLKDIV_TOP_ACLK200_SHIFT	(0)
-#define EXYNOS4_CLKDIV_TOP_ACLK200_MASK		(0x7 << EXYNOS4_CLKDIV_TOP_ACLK200_SHIFT)
-#define EXYNOS4_CLKDIV_TOP_ACLK100_SHIFT	(4)
-#define EXYNOS4_CLKDIV_TOP_ACLK100_MASK		(0xF << EXYNOS4_CLKDIV_TOP_ACLK100_SHIFT)
-#define EXYNOS4_CLKDIV_TOP_ACLK160_SHIFT	(8)
-#define EXYNOS4_CLKDIV_TOP_ACLK160_MASK		(0x7 << EXYNOS4_CLKDIV_TOP_ACLK160_SHIFT)
-#define EXYNOS4_CLKDIV_TOP_ACLK133_SHIFT	(12)
-#define EXYNOS4_CLKDIV_TOP_ACLK133_MASK		(0x7 << EXYNOS4_CLKDIV_TOP_ACLK133_SHIFT)
-#define EXYNOS4_CLKDIV_TOP_ONENAND_SHIFT	(16)
-#define EXYNOS4_CLKDIV_TOP_ONENAND_MASK		(0x7 << EXYNOS4_CLKDIV_TOP_ONENAND_SHIFT)
-#define EXYNOS4_CLKDIV_TOP_ACLK266_GPS_SHIFT	(20)
-#define EXYNOS4_CLKDIV_TOP_ACLK266_GPS_MASK	(0x7 << EXYNOS4_CLKDIV_TOP_ACLK266_GPS_SHIFT)
-#define EXYNOS4_CLKDIV_TOP_ACLK400_MCUISP_SHIFT	(24)
-#define EXYNOS4_CLKDIV_TOP_ACLK400_MCUISP_MASK	(0x7 << EXYNOS4_CLKDIV_TOP_ACLK400_MCUISP_SHIFT)
-
-#define EXYNOS4_CLKDIV_BUS_GDLR_SHIFT		(0)
-#define EXYNOS4_CLKDIV_BUS_GDLR_MASK		(0x7 << EXYNOS4_CLKDIV_BUS_GDLR_SHIFT)
-#define EXYNOS4_CLKDIV_BUS_GPLR_SHIFT		(4)
-#define EXYNOS4_CLKDIV_BUS_GPLR_MASK		(0x7 << EXYNOS4_CLKDIV_BUS_GPLR_SHIFT)
-
-#define EXYNOS4_CLKDIV_CAM_FIMC0_SHIFT		(0)
-#define EXYNOS4_CLKDIV_CAM_FIMC0_MASK		(0xf << EXYNOS4_CLKDIV_CAM_FIMC0_SHIFT)
-#define EXYNOS4_CLKDIV_CAM_FIMC1_SHIFT		(4)
-#define EXYNOS4_CLKDIV_CAM_FIMC1_MASK		(0xf << EXYNOS4_CLKDIV_CAM_FIMC1_SHIFT)
-#define EXYNOS4_CLKDIV_CAM_FIMC2_SHIFT		(8)
-#define EXYNOS4_CLKDIV_CAM_FIMC2_MASK		(0xf << EXYNOS4_CLKDIV_CAM_FIMC2_SHIFT)
-#define EXYNOS4_CLKDIV_CAM_FIMC3_SHIFT		(12)
-#define EXYNOS4_CLKDIV_CAM_FIMC3_MASK		(0xf << EXYNOS4_CLKDIV_CAM_FIMC3_SHIFT)
-
-#define EXYNOS4_CLKDIV_CAM1			(S5P_VA_CMU + 0x0C568)
-
-#define EXYNOS4_CLKDIV_STAT_CAM1		(S5P_VA_CMU + 0x0C668)
-
-#define EXYNOS4_CLKDIV_CAM1_JPEG_SHIFT		(0)
-#define EXYNOS4_CLKDIV_CAM1_JPEG_MASK		(0xf << EXYNOS4_CLKDIV_CAM1_JPEG_SHIFT)
-
-#endif /* __DEVFREQ_EXYNOS4_BUS_H */

drivers/devfreq/exynos/exynos5_bus.c

-/*
- * Copyright (c) 2012 Samsung Electronics Co., Ltd.
- *		http://www.samsung.com/
- *
- * EXYNOS5 INT clock frequency scaling support using DEVFREQ framework
- * Based on work done by Jonghwan Choi <jhbird.choi@samsung.com>
- * Support for only EXYNOS5250 is present.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
-
-#include <linux/module.h>
-#include <linux/devfreq.h>
-#include <linux/io.h>
-#include <linux/pm_opp.h>
-#include <linux/slab.h>
-#include <linux/suspend.h>
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/platform_device.h>
-#include <linux/pm_qos.h>
-#include <linux/regulator/consumer.h>
-#include <linux/of_address.h>
-#include <linux/of_platform.h>
-
-#include "exynos_ppmu.h"
-
-#define MAX_SAFEVOLT			1100000 /* 1.10V */
-/* Assume that the bus is saturated if the utilization is 25% */
-#define INT_BUS_SATURATION_RATIO	25
-
-enum int_level_idx {
-	LV_0,
-	LV_1,
-	LV_2,
-	LV_3,
-	LV_4,
-	_LV_END
-};
-
-enum exynos_ppmu_list {
-	PPMU_RIGHT,
-	PPMU_END,
-};
-
-struct busfreq_data_int {
-	struct device *dev;
-	struct devfreq *devfreq;
-	struct regulator *vdd_int;
-	struct busfreq_ppmu_data ppmu_data;
-	unsigned long curr_freq;
-	bool disabled;
-
-	struct notifier_block pm_notifier;
-	struct mutex lock;
-	struct pm_qos_request int_req;
-	struct clk *int_clk;
-};
-
-struct int_bus_opp_table {
-	unsigned int idx;
-	unsigned long clk;
-	unsigned long volt;
-};
-
-static struct int_bus_opp_table exynos5_int_opp_table[] = {
-	{LV_0, 266000, 1025000},
-	{LV_1, 200000, 1025000},
-	{LV_2, 160000, 1025000},
-	{LV_3, 133000, 1025000},
-	{LV_4, 100000, 1025000},
-	{0, 0, 0},
-};
-
-static int exynos5_int_setvolt(struct busfreq_data_int *data,
-				unsigned long volt)
-{
-	return regulator_set_voltage(data->vdd_int, volt, MAX_SAFEVOLT);
-}
-
-static int exynos5_busfreq_int_target(struct device *dev, unsigned long *_freq,
-			      u32 flags)
-{
-	int err = 0;
-	struct platform_device *pdev = container_of(dev, struct platform_device,
-						    dev);
-	struct busfreq_data_int *data = platform_get_drvdata(pdev);
-	struct dev_pm_opp *opp;
-	unsigned long old_freq, freq;
-	unsigned long volt;
-
-	rcu_read_lock();
-	opp = devfreq_recommended_opp(dev, _freq, flags);
-	if (IS_ERR(opp)) {
-		rcu_read_unlock();
-		dev_err(dev, "%s: Invalid OPP.\n", __func__);
-		return PTR_ERR(opp);
-	}
-
-	freq = dev_pm_opp_get_freq(opp);
-	volt = dev_pm_opp_get_voltage(opp);
-	rcu_read_unlock();
-
-	old_freq = data->curr_freq;
-
-	if (old_freq == freq)
-		return 0;
-
-	dev_dbg(dev, "targeting %lukHz %luuV\n", freq, volt);
-
-	mutex_lock(&data->lock);
-
-	if (data->disabled)
-		goto out;
-
-	if (freq > exynos5_int_opp_table[0].clk)
-		pm_qos_update_request(&data->int_req, freq * 16 / 1000);
-	else
-		pm_qos_update_request(&data->int_req, -1);
-
-	if (old_freq < freq)
-		err = exynos5_int_setvolt(data, volt);
-	if (err)
-		goto out;
-
-	err = clk_set_rate(data->int_clk, freq * 1000);
-
-	if (err)
-		goto out;
-
-	if (old_freq > freq)
-		err = exynos5_int_setvolt(data, volt);
-	if (err)
-		goto out;
-
-	data->curr_freq = freq;
-out:
-	mutex_unlock(&data->lock);
-	return err;
-}
-
-static int exynos5_int_get_dev_status(struct device *dev,
-				      struct devfreq_dev_status *stat)
-{
-	struct platform_device *pdev = container_of(dev, struct platform_device,
-						    dev);
-	struct busfreq_data_int *data = platform_get_drvdata(pdev);
-	struct busfreq_ppmu_data *ppmu_data = &data->ppmu_data;
-	int busier_dmc;
-
-	exynos_read_ppmu(ppmu_data);
-	busier_dmc = exynos_get_busier_ppmu(ppmu_data);
-
-	stat->current_frequency = data->curr_freq;
-
-	/* Number of cycles spent on memory access */
-	stat->busy_time = ppmu_data->ppmu[busier_dmc].count[PPMU_PMNCNT3];
-	stat->busy_time *= 100 / INT_BUS_SATURATION_RATIO;
-	stat->total_time = ppmu_data->ppmu[busier_dmc].ccnt;
-
-	return 0;
-}
-
-static struct devfreq_dev_profile exynos5_devfreq_int_profile = {
-	.initial_freq		= 160000,
-	.polling_ms		= 100,
-	.target			= exynos5_busfreq_int_target,
-	.get_dev_status		= exynos5_int_get_dev_status,
-};
-
-static int exynos5250_init_int_tables(struct busfreq_data_int *data)
-{
-	int i, err = 0;
-
-	for (i = LV_0; i < _LV_END; i++) {
-		err = dev_pm_opp_add(data->dev, exynos5_int_opp_table[i].clk,
-				exynos5_int_opp_table[i].volt);
-		if (err) {
-			dev_err(data->dev, "Cannot add opp entries.\n");
-			return err;
-		}
-	}
-
-	return 0;
-}
-
-static int exynos5_busfreq_int_pm_notifier_event(struct notifier_block *this,
-		unsigned long event, void *ptr)
-{
-	struct busfreq_data_int *data = container_of(this,
-					struct busfreq_data_int, pm_notifier);
-	struct dev_pm_opp *opp;
-	unsigned long maxfreq = ULONG_MAX;
-	unsigned long freq;
-	unsigned long volt;
-	int err = 0;
-
-	switch (event) {
-	case PM_SUSPEND_PREPARE:
-		/* Set Fastest and Deactivate DVFS */
-		mutex_lock(&data->lock);
-
-		data->disabled = true;
-
-		rcu_read_lock();
-		opp = dev_pm_opp_find_freq_floor(data->dev, &maxfreq);
-		if (IS_ERR(opp)) {
-			rcu_read_unlock();
-			err = PTR_ERR(opp);
-			goto unlock;
-		}
-		freq = dev_pm_opp_get_freq(opp);
-		volt = dev_pm_opp_get_voltage(opp);
-		rcu_read_unlock();
-
-		err = exynos5_int_setvolt(data, volt);
-		if (err)
-			goto unlock;
-
-		err = clk_set_rate(data->int_clk, freq * 1000);
-
-		if (err)
-			goto unlock;
-
-		data->curr_freq = freq;
-unlock:
-		mutex_unlock(&data->lock);
-		if (err)
-			return NOTIFY_BAD;
-		return NOTIFY_OK;
-	case PM_POST_RESTORE:
-	case PM_POST_SUSPEND:
-		/* Reactivate */
-		mutex_lock(&data->lock);
-		data->disabled = false;
-		mutex_unlock(&data->lock);
-		return NOTIFY_OK;
-	}
-
-	return NOTIFY_DONE;
-}
-
-static int exynos5_busfreq_int_probe(struct platform_device *pdev)
-{
-	struct busfreq_data_int *data;
-	struct busfreq_ppmu_data *ppmu_data;
-	struct dev_pm_opp *opp;
-	struct device *dev = &pdev->dev;
-	struct device_node *np;
-	unsigned long initial_freq;
-	unsigned long initial_volt;
-	int err = 0;
-	int i;
-
-	data = devm_kzalloc(&pdev->dev, sizeof(struct busfreq_data_int),
-				GFP_KERNEL);
-	if (data == NULL) {
-		dev_err(dev, "Cannot allocate memory.\n");
-		return -ENOMEM;
-	}
-
-	ppmu_data = &data->ppmu_data;
-	ppmu_data->ppmu_end = PPMU_END;
-	ppmu_data->ppmu = devm_kzalloc(dev,
-				       sizeof(struct exynos_ppmu) * PPMU_END,
-				       GFP_KERNEL);
-	if (!ppmu_data->ppmu) {
-		dev_err(dev, "Failed to allocate memory for exynos_ppmu\n");
-		return -ENOMEM;
-	}
-
-	np = of_find_compatible_node(NULL, NULL, "samsung,exynos5250-ppmu");
-	if (np == NULL) {
-		pr_err("Unable to find PPMU node\n");
-		return -ENOENT;
-	}
-
-	for (i = 0; i < ppmu_data->ppmu_end; i++) {
-		/* map PPMU memory region */
-		ppmu_data->ppmu[i].hw_base = of_iomap(np, i);
-		if (ppmu_data->ppmu[i].hw_base == NULL) {
-			dev_err(&pdev->dev, "failed to map memory region\n");
-			return -ENOMEM;
-		}
-	}
-	data->pm_notifier.notifier_call = exynos5_busfreq_int_pm_notifier_event;
-	data->dev = dev;
-	mutex_init(&data->lock);
-
-	err = exynos5250_init_int_tables(data);
-	if (err)
-		return err;
-
-	data->vdd_int = devm_regulator_get(dev, "vdd_int");
-	if (IS_ERR(data->vdd_int)) {
-		dev_err(dev, "Cannot get the regulator \"vdd_int\"\n");
-		return PTR_ERR(data->vdd_int);
-	}
-
-	data->int_clk = devm_clk_get(dev, "int_clk");
-	if (IS_ERR(data->int_clk)) {
-		dev_err(dev, "Cannot get clock \"int_clk\"\n");
-		return PTR_ERR(data->int_clk);
-	}
-
-	rcu_read_lock();
-	opp = dev_pm_opp_find_freq_floor(dev,
-			&exynos5_devfreq_int_profile.initial_freq);
-	if (IS_ERR(opp)) {
-		rcu_read_unlock();
-		dev_err(dev, "Invalid initial frequency %lu kHz.\n",
-		       exynos5_devfreq_int_profile.initial_freq);
-		return PTR_ERR(opp);
-	}
-	initial_freq = dev_pm_opp_get_freq(opp);
-	initial_volt = dev_pm_opp_get_voltage(opp);
-	rcu_read_unlock();
-	data->curr_freq = initial_freq;
-
-	err = clk_set_rate(data->int_clk, initial_freq * 1000);
-	if (err) {
-		dev_err(dev, "Failed to set initial frequency\n");
-		return err;
-	}
-
-	err = exynos5_int_setvolt(data, initial_volt);
-	if (err)
-		return err;
-
-	platform_set_drvdata(pdev, data);
-
-	busfreq_mon_reset(ppmu_data);
-
-	data->devfreq = devm_devfreq_add_device(dev, &exynos5_devfreq_int_profile,
-					   "simple_ondemand", NULL);
-	if (IS_ERR(data->devfreq))
-		return PTR_ERR(data->devfreq);
-
-	err = devm_devfreq_register_opp_notifier(dev, data->devfreq);
-	if (err < 0) {
-		dev_err(dev, "Failed to register opp notifier\n");
-		return err;
-	}
-
-	err = register_pm_notifier(&data->pm_notifier);
-	if (err) {
-		dev_err(dev, "Failed to setup pm notifier\n");
-		return err;
-	}
-
-	/* TODO: Add a new QOS class for int/mif bus */
-	pm_qos_add_request(&data->int_req, PM_QOS_NETWORK_THROUGHPUT, -1);
-
-	return 0;
-}
-
-static int exynos5_busfreq_int_remove(struct platform_device *pdev)
-{
-	struct busfreq_data_int *data = platform_get_drvdata(pdev);
-
-	pm_qos_remove_request(&data->int_req);
-	unregister_pm_notifier(&data->pm_notifier);
-
-	return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int exynos5_busfreq_int_resume(struct device *dev)
-{
-	struct platform_device *pdev = container_of(dev, struct platform_device,
-						    dev);
-	struct busfreq_data_int *data = platform_get_drvdata(pdev);
-	struct busfreq_ppmu_data *ppmu_data = &data->ppmu_data;
-
-	busfreq_mon_reset(ppmu_data);
-	return 0;
-}
-static const struct dev_pm_ops exynos5_busfreq_int_pm = {
-	.resume	= exynos5_busfreq_int_resume,
-};
-#endif
-static SIMPLE_DEV_PM_OPS(exynos5_busfreq_int_pm_ops, NULL,
-			 exynos5_busfreq_int_resume);
-
-/* platform device pointer for exynos5 devfreq device. */
-static struct platform_device *exynos5_devfreq_pdev;
-
-static struct platform_driver exynos5_busfreq_int_driver = {
-	.probe		= exynos5_busfreq_int_probe,
-	.remove		= exynos5_busfreq_int_remove,
-	.driver		= {
-		.name		= "exynos5-bus-int",
-		.pm		= &exynos5_busfreq_int_pm_ops,
-	},
-};
-
-static int __init exynos5_busfreq_int_init(void)
-{
-	int ret;
-
-	ret = platform_driver_register(&exynos5_busfreq_int_driver);
-	if (ret < 0)
-		goto out;
-
-	exynos5_devfreq_pdev =
-		platform_device_register_simple("exynos5-bus-int", -1, NULL, 0);
-	if (IS_ERR(exynos5_devfreq_pdev)) {
-		ret = PTR_ERR(exynos5_devfreq_pdev);
-		goto out1;
-	}
-
-	return 0;
-out1:
-	platform_driver_unregister(&exynos5_busfreq_int_driver);
-out:
-	return ret;
-}
-late_initcall(exynos5_busfreq_int_init);
-
-static void __exit exynos5_busfreq_int_exit(void)
-{
-	platform_device_unregister(exynos5_devfreq_pdev);
-	platform_driver_unregister(&exynos5_busfreq_int_driver);
-}
-module_exit(exynos5_busfreq_int_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("EXYNOS5 busfreq driver with devfreq framework");

drivers/devfreq/exynos/exynos_ppmu.c

-/*
- * Copyright (c) 2012 Samsung Electronics Co., Ltd.
- *		http://www.samsung.com/
- *
- * EXYNOS - PPMU 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/kernel.h>
-#include <linux/types.h>
-#include <linux/io.h>
-
-#include "exynos_ppmu.h"
-
-void exynos_ppmu_reset(void __iomem *ppmu_base)
-{
-	__raw_writel(PPMU_CYCLE_RESET | PPMU_COUNTER_RESET, ppmu_base);
-	__raw_writel(PPMU_ENABLE_CYCLE  |
-		     PPMU_ENABLE_COUNT0 |
-		     PPMU_ENABLE_COUNT1 |
-		     PPMU_ENABLE_COUNT2 |
-		     PPMU_ENABLE_COUNT3,
-		     ppmu_base + PPMU_CNTENS);
-}
-
-void exynos_ppmu_setevent(void __iomem *ppmu_base, unsigned int ch,
-			unsigned int evt)
-{
-	__raw_writel(evt, ppmu_base + PPMU_BEVTSEL(ch));
-}
-
-void exynos_ppmu_start(void __iomem *ppmu_base)
-{
-	__raw_writel(PPMU_ENABLE, ppmu_base);
-}
-
-void exynos_ppmu_stop(void __iomem *ppmu_base)
-{
-	__raw_writel(PPMU_DISABLE, ppmu_base);
-}
-
-unsigned int exynos_ppmu_read(void __iomem *ppmu_base, unsigned int ch)
-{
-	unsigned int total;
-
-	if (ch == PPMU_PMNCNT3)
-		total = ((__raw_readl(ppmu_base + PMCNT_OFFSET(ch)) << 8) |
-			  __raw_readl(ppmu_base + PMCNT_OFFSET(ch + 1)));
-	else
-		total = __raw_readl(ppmu_base + PMCNT_OFFSET(ch));
-
-	return total;
-}
-
-void busfreq_mon_reset(struct busfreq_ppmu_data *ppmu_data)
-{
-	unsigned int i;
-
-	for (i = 0; i < ppmu_data->ppmu_end; i++) {
-		void __iomem *ppmu_base = ppmu_data->ppmu[i].hw_base;
-
-		/* Reset the performance and cycle counters */
-		exynos_ppmu_reset(ppmu_base);
-
-		/* Setup count registers to monitor read/write transactions */
-		ppmu_data->ppmu[i].event[PPMU_PMNCNT3] = RDWR_DATA_COUNT;
-		exynos_ppmu_setevent(ppmu_base, PPMU_PMNCNT3,
-					ppmu_data->ppmu[i].event[PPMU_PMNCNT3]);
-
-		exynos_ppmu_start(ppmu_base);
-	}
-}
-EXPORT_SYMBOL(busfreq_mon_reset);
-
-void exynos_read_ppmu(struct busfreq_ppmu_data *ppmu_data)
-{
-	int i, j;
-
-	for (i = 0; i < ppmu_data->ppmu_end; i++) {
-		void __iomem *ppmu_base = ppmu_data->ppmu[i].hw_base;
-
-		exynos_ppmu_stop(ppmu_base);
-
-		/* Update local data from PPMU */
-		ppmu_data->ppmu[i].ccnt = __raw_readl(ppmu_base + PPMU_CCNT);
-
-		for (j = PPMU_PMNCNT0; j < PPMU_PMNCNT_MAX; j++) {
-			if (ppmu_data->ppmu[i].event[j] == 0)
-				ppmu_data->ppmu[i].count[j] = 0;
-			else
-				ppmu_data->ppmu[i].count[j] =
-					exynos_ppmu_read(ppmu_base, j);
-		}
-	}
-
-	busfreq_mon_reset(ppmu_data);
-}
-EXPORT_SYMBOL(exynos_read_ppmu);
-
-int exynos_get_busier_ppmu(struct busfreq_ppmu_data *ppmu_data)
-{
-	unsigned int count = 0;
-	int i, j, busy = 0;
-
-	for (i = 0; i < ppmu_data->ppmu_end; i++) {
-		for (j = PPMU_PMNCNT0; j < PPMU_PMNCNT_MAX; j++) {
-			if (ppmu_data->ppmu[i].count[j] > count) {
-				count = ppmu_data->ppmu[i].count[j];
-				busy = i;
-			}
-		}
-	}
-
-	return busy;
-}
-EXPORT_SYMBOL(exynos_get_busier_ppmu);

drivers/devfreq/exynos/exynos_ppmu.h

-/*
- * Copyright (c) 2012 Samsung Electronics Co., Ltd.
- *		http://www.samsung.com/
- *
- * EXYNOS PPMU header
- *
- * 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 __DEVFREQ_EXYNOS_PPMU_H
-#define __DEVFREQ_EXYNOS_PPMU_H __FILE__
-
-#include <linux/ktime.h>
-
-/* For PPMU Control */
-#define PPMU_ENABLE             BIT(0)
-#define PPMU_DISABLE            0x0
-#define PPMU_CYCLE_RESET        BIT(1)
-#define PPMU_COUNTER_RESET      BIT(2)
-
-#define PPMU_ENABLE_COUNT0      BIT(0)
-#define PPMU_ENABLE_COUNT1      BIT(1)
-#define PPMU_ENABLE_COUNT2      BIT(2)
-#define PPMU_ENABLE_COUNT3      BIT(3)
-#define PPMU_ENABLE_CYCLE       BIT(31)
-
-#define PPMU_CNTENS		0x10
-#define PPMU_FLAG		0x50
-#define PPMU_CCNT_OVERFLOW	BIT(31)
-#define PPMU_CCNT		0x100
-
-#define PPMU_PMCNT0		0x110
-#define PPMU_PMCNT_OFFSET	0x10
-#define PMCNT_OFFSET(x)		(PPMU_PMCNT0 + (PPMU_PMCNT_OFFSET * x))
-
-#define PPMU_BEVT0SEL		0x1000
-#define PPMU_BEVTSEL_OFFSET	0x100
-#define PPMU_BEVTSEL(x)		(PPMU_BEVT0SEL + (ch * PPMU_BEVTSEL_OFFSET))
-
-/* For Event Selection */
-#define RD_DATA_COUNT		0x5
-#define WR_DATA_COUNT		0x6
-#define RDWR_DATA_COUNT		0x7
-
-enum ppmu_counter {
-	PPMU_PMNCNT0,
-	PPMU_PMCCNT1,
-	PPMU_PMNCNT2,
-	PPMU_PMNCNT3,
-	PPMU_PMNCNT_MAX,
-};
-
-struct bus_opp_table {
-	unsigned int idx;
-	unsigned long clk;
-	unsigned long volt;
-};
-
-struct exynos_ppmu {
-	void __iomem *hw_base;
-	unsigned int ccnt;
-	unsigned int event[PPMU_PMNCNT_MAX];
-	unsigned int count[PPMU_PMNCNT_MAX];
-	unsigned long long ns;
-	ktime_t reset_time;
-	bool ccnt_overflow;
-	bool count_overflow[PPMU_PMNCNT_MAX];
-};
-
-struct busfreq_ppmu_data {
-	struct exynos_ppmu *ppmu;
-	int ppmu_end;
-};
-
-void exynos_ppmu_reset(void __iomem *ppmu_base);
-void exynos_ppmu_setevent(void __iomem *ppmu_base, unsigned int ch,
-			unsigned int evt);
-void exynos_ppmu_start(void __iomem *ppmu_base);
-void exynos_ppmu_stop(void __iomem *ppmu_base);
-unsigned int exynos_ppmu_read(void __iomem *ppmu_base, unsigned int ch);
-void busfreq_mon_reset(struct busfreq_ppmu_data *ppmu_data);
-void exynos_read_ppmu(struct busfreq_ppmu_data *ppmu_data);
-int exynos_get_busier_ppmu(struct busfreq_ppmu_data *ppmu_data);
-#endif /* __DEVFREQ_EXYNOS_PPMU_H */