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Commit bfcd6204 authored by Chanwoo Choi's avatar Chanwoo Choi Committed by MyungJoo Ham
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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: default avatarChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: default avatarMyungJoo Ham <myungjoo.ham@samsung.com>
Acked-by: default avatarKrzysztof Kozlowski <k.kozlowski@samsung.com>
parent 38279cac
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Showing with 0 additions and 1828 deletions
drivers/devfreq/Kconfig
View file @ bfcd6204
......@@ -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
View file @ bfcd6204
......@@ -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-$(CONFIG_ARM_TEGRA_DEVFREQ) += tegra-devfreq.o
# DEVFREQ Event Drivers
......
drivers/devfreq/exynos/Makefile deleted 100644 → 0
View file @ 38279cac
# Exynos DEVFREQ Drivers
obj-$(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.c deleted 100644 → 0
View file @ 38279cac
/* drivers/devfreq/exynos4210_memorybus.c
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com/
* MyungJoo Ham <myungjoo.ham@samsung.com>
*
* EXYNOS4 - Memory/Bus clock frequency scaling support in DEVFREQ framework
* This version supports EXYNOS4210 only. This changes bus frequencies
* and vddint voltages. Exynos4412/4212 should be able to be supported
* with minor modifications.
*
* 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/io.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/suspend.h>
#include <linux/pm_opp.h>
#include <linux/devfreq.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <linux/module.h>
#include <mach/map.h>
#include "exynos_ppmu.h"
#include "exynos4_bus.h"
#define MAX_SAFEVOLT 1200000 /* 1.2V */
enum exynos4_busf_type {
TYPE_BUSF_EXYNOS4210,
TYPE_BUSF_EXYNOS4x12,
};
/* Assume that the bus is saturated if the utilization is 40% */
#define BUS_SATURATION_RATIO 40
enum busclk_level_idx {
LV_0 = 0,
LV_1,
LV_2,
LV_3,
LV_4,
_LV_END
};
enum exynos_ppmu_idx {
PPMU_DMC0,
PPMU_DMC1,
PPMU_END,
};
#define EX4210_LV_MAX LV_2
#define EX4x12_LV_MAX LV_4
#define EX4210_LV_NUM (LV_2 + 1)
#define EX4x12_LV_NUM (LV_4 + 1)
/**
* struct busfreq_opp_info - opp information for bus
* @rate: Frequency in hertz
* @volt: Voltage in microvolts corresponding to this OPP
*/
struct busfreq_opp_info {
unsigned long rate;
unsigned long volt;
};
struct busfreq_data {
enum exynos4_busf_type type;
struct device *dev;
struct devfreq *devfreq;
bool disabled;
struct regulator *vdd_int;
struct regulator *vdd_mif; /* Exynos4412/4212 only */
struct busfreq_opp_info curr_oppinfo;
struct busfreq_ppmu_data ppmu_data;
struct notifier_block pm_notifier;
struct mutex lock;
/* Dividers calculated at boot/probe-time */
unsigned int dmc_divtable[_LV_END]; /* DMC0 */
unsigned int top_divtable[_LV_END];
};
/* 4210 controls clock of mif and voltage of int */
static struct bus_opp_table exynos4210_busclk_table[] = {
{LV_0, 400000, 1150000},
{LV_1, 267000, 1050000},
{LV_2, 133000, 1025000},
{0, 0, 0},
};
/*
* MIF is the main control knob clock for Exynos4x12 MIF/INT
* clock and voltage of both mif/int are controlled.
*/
static struct bus_opp_table exynos4x12_mifclk_table[] = {
{LV_0, 400000, 1100000},
{LV_1, 267000, 1000000},
{LV_2, 160000, 950000},
{LV_3, 133000, 950000},
{LV_4, 100000, 950000},
{0, 0, 0},
};
/*
* INT is not the control knob of 4x12. LV_x is not meant to represent
* the current performance. (MIF does)
*/
static struct bus_opp_table exynos4x12_intclk_table[] = {
{LV_0, 200000, 1000000},
{LV_1, 160000, 950000},
{LV_2, 133000, 925000},
{LV_3, 100000, 900000},
{0, 0, 0},
};
/* TODO: asv volt definitions are "__initdata"? */
/* Some chips have different operating voltages */
static unsigned int exynos4210_asv_volt[][EX4210_LV_NUM] = {
{1150000, 1050000, 1050000},
{1125000, 1025000, 1025000},
{1100000, 1000000, 1000000},
{1075000, 975000, 975000},
{1050000, 950000, 950000},
};
static unsigned int exynos4x12_mif_step_50[][EX4x12_LV_NUM] = {
/* 400 267 160 133 100 */
{1050000, 950000, 900000, 900000, 900000}, /* ASV0 */
{1050000, 950000, 900000, 900000, 900000}, /* ASV1 */
{1050000, 950000, 900000, 900000, 900000}, /* ASV2 */
{1050000, 900000, 900000, 900000, 900000}, /* ASV3 */
{1050000, 900000, 900000, 900000, 850000}, /* ASV4 */
{1050000, 900000, 900000, 850000, 850000}, /* ASV5 */
{1050000, 900000, 850000, 850000, 850000}, /* ASV6 */
{1050000, 900000, 850000, 850000, 850000}, /* ASV7 */
{1050000, 900000, 850000, 850000, 850000}, /* ASV8 */
};
static unsigned int exynos4x12_int_volt[][EX4x12_LV_NUM] = {
/* 200 160 133 100 */
{1000000, 950000, 925000, 900000}, /* ASV0 */
{975000, 925000, 925000, 900000}, /* ASV1 */
{950000, 925000, 900000, 875000}, /* ASV2 */
{950000, 900000, 900000, 875000}, /* ASV3 */
{925000, 875000, 875000, 875000}, /* ASV4 */
{900000, 850000, 850000, 850000}, /* ASV5 */
{900000, 850000, 850000, 850000}, /* ASV6 */
{900000, 850000, 850000, 850000}, /* ASV7 */
{900000, 850000, 850000, 850000}, /* ASV8 */
};
/*** Clock Divider Data for Exynos4210 ***/
static unsigned int exynos4210_clkdiv_dmc0[][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: 266.7MHz */
{ 4, 1, 1, 2, 1, 1, 3, 1 },
/* DMC L2: 133MHz */
{ 5, 1, 1, 5, 1, 1, 3, 1 },
};
static unsigned int exynos4210_clkdiv_top[][5] = {
/*
* Clock divider value for following
* { DIVACLK200, DIVACLK100, DIVACLK160, DIVACLK133, DIVONENAND }
*/
/* ACLK200 L0: 200MHz */
{ 3, 7, 4, 5, 1 },
/* ACLK200 L1: 160MHz */
{ 4, 7, 5, 6, 1 },
/* ACLK200 L2: 133MHz */
{ 5, 7, 7, 7, 1 },
};
static unsigned int exynos4210_clkdiv_lr_bus[][2] = {
/*
* Clock divider value for following
* { DIVGDL/R, DIVGPL/R }
*/
/* ACLK_GDL/R L1: 200MHz */
{ 3, 1 },
/* ACLK_GDL/R L2: 160MHz */
{ 4, 1 },
/* ACLK_GDL/R L3: 133MHz */
{ 5, 1 },
};
/*** Clock Divider Data for Exynos4212/4412 ***/
static unsigned int exynos4x12_clkdiv_dmc0[][6] = {
/*
* Clock divider value for following
* { DIVACP, DIVACP_PCLK, DIVDPHY, DIVDMC, DIVDMCD
* DIVDMCP}
*/
/* DMC L0: 400MHz */
{3, 1, 1, 1, 1, 1},
/* DMC L1: 266.7MHz */
{4, 1, 1, 2, 1, 1},
/* DMC L2: 160MHz */
{5, 1, 1, 4, 1, 1},
/* DMC L3: 133MHz */
{5, 1, 1, 5, 1, 1},
/* DMC L4: 100MHz */
{7, 1, 1, 7, 1, 1},
};
static unsigned int exynos4x12_clkdiv_dmc1[][6] = {
/*
* Clock divider value for following
* { G2DACP, DIVC2C, DIVC2C_ACLK }
*/
/* DMC L0: 400MHz */
{3, 1, 1},
/* DMC L1: 266.7MHz */
{4, 2, 1},
/* DMC L2: 160MHz */
{5, 4, 1},
/* DMC L3: 133MHz */
{5, 5, 1},
/* DMC L4: 100MHz */
{7, 7, 1},
};
static unsigned int exynos4x12_clkdiv_top[][5] = {
/*
* Clock divider value for following
* { DIVACLK266_GPS, DIVACLK100, DIVACLK160,
DIVACLK133, DIVONENAND }
*/
/* ACLK_GDL/R L0: 200MHz */
{2, 7, 4, 5, 1},
/* ACLK_GDL/R L1: 200MHz */
{2, 7, 4, 5, 1},
/* ACLK_GDL/R L2: 160MHz */
{4, 7, 5, 7, 1},
/* ACLK_GDL/R L3: 133MHz */
{4, 7, 5, 7, 1},
/* ACLK_GDL/R L4: 100MHz */
{7, 7, 7, 7, 1},
};
static unsigned int exynos4x12_clkdiv_lr_bus[][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: 133MHz */
{5, 1},
/* ACLK_GDL/R L4: 100MHz */
{7, 1},
};
static unsigned int exynos4x12_clkdiv_sclkip[][3] = {
/*
* Clock divider value for following
* { DIVMFC, DIVJPEG, DIVFIMC0~3}
*/
/* SCLK_MFC: 200MHz */
{3, 3, 4},
/* SCLK_MFC: 200MHz */
{3, 3, 4},
/* SCLK_MFC: 160MHz */
{4, 4, 5},
/* SCLK_MFC: 133MHz */
{5, 5, 5},
/* SCLK_MFC: 100MHz */
{7, 7, 7},
};
static int exynos4210_set_busclk(struct busfreq_data *data,
struct busfreq_opp_info *oppi)
{
unsigned int index;
unsigned int tmp;
for (index = LV_0; index < EX4210_LV_NUM; index++)
if (oppi->rate == exynos4210_busclk_table[index].clk)
break;
if (index == EX4210_LV_NUM)
return -EINVAL;
/* Change Divider - DMC0 */
tmp = data->dmc_divtable[index];
__raw_writel(tmp, EXYNOS4_CLKDIV_DMC0);
do {
tmp = __raw_readl(EXYNOS4_CLKDIV_STAT_DMC0);
} while (tmp & 0x11111111);
/* Change Divider - TOP */
tmp = data->top_divtable[index];
__raw_writel(tmp, EXYNOS4_CLKDIV_TOP);
do {
tmp = __raw_readl(EXYNOS4_CLKDIV_STAT_TOP);
} while (tmp & 0x11111);
/* Change Divider - LEFTBUS */
tmp = __raw_readl(EXYNOS4_CLKDIV_LEFTBUS);
tmp &= ~(EXYNOS4_CLKDIV_BUS_GDLR_MASK | EXYNOS4_CLKDIV_BUS_GPLR_MASK);
tmp |= ((exynos4210_clkdiv_lr_bus[index][0] <<
EXYNOS4_CLKDIV_BUS_GDLR_SHIFT) |
(exynos4210_clkdiv_lr_bus[index][1] <<
EXYNOS4_CLKDIV_BUS_GPLR_SHIFT));
__raw_writel(tmp, EXYNOS4_CLKDIV_LEFTBUS);
do {
tmp = __raw_readl(EXYNOS4_CLKDIV_STAT_LEFTBUS);
} while (tmp & 0x11);
/* Change Divider - RIGHTBUS */
tmp = __raw_readl(EXYNOS4_CLKDIV_RIGHTBUS);
tmp &= ~(EXYNOS4_CLKDIV_BUS_GDLR_MASK | EXYNOS4_CLKDIV_BUS_GPLR_MASK);
tmp |= ((exynos4210_clkdiv_lr_bus[index][0] <<
EXYNOS4_CLKDIV_BUS_GDLR_SHIFT) |
(exynos4210_clkdiv_lr_bus[index][1] <<
EXYNOS4_CLKDIV_BUS_GPLR_SHIFT));
__raw_writel(tmp, EXYNOS4_CLKDIV_RIGHTBUS);
do {
tmp = __raw_readl(EXYNOS4_CLKDIV_STAT_RIGHTBUS);
} while (tmp & 0x11);
return 0;
}
static int exynos4x12_set_busclk(struct busfreq_data *data,
struct busfreq_opp_info *oppi)
{
unsigned int index;
unsigned int tmp;
for (index = LV_0; index < EX4x12_LV_NUM; index++)
if (oppi->rate == exynos4x12_mifclk_table[index].clk)
break;
if (index == EX4x12_LV_NUM)
return -EINVAL;
/* Change Divider - DMC0 */
tmp = data->dmc_divtable[index];
__raw_writel(tmp, EXYNOS4_CLKDIV_DMC0);
do {
tmp = __raw_readl(EXYNOS4_CLKDIV_STAT_DMC0);
} while (tmp & 0x11111111);
/* Change Divider - DMC1 */
tmp = __raw_readl(EXYNOS4_CLKDIV_DMC1);
tmp &= ~(EXYNOS4_CLKDIV_DMC1_G2D_ACP_MASK |
EXYNOS4_CLKDIV_DMC1_C2C_MASK |
EXYNOS4_CLKDIV_DMC1_C2CACLK_MASK);
tmp |= ((exynos4x12_clkdiv_dmc1[index][0] <<
EXYNOS4_CLKDIV_DMC1_G2D_ACP_SHIFT) |
(exynos4x12_clkdiv_dmc1[index][1] <<
EXYNOS4_CLKDIV_DMC1_C2C_SHIFT) |
(exynos4x12_clkdiv_dmc1[index][2] <<
EXYNOS4_CLKDIV_DMC1_C2CACLK_SHIFT));
__raw_writel(tmp, EXYNOS4_CLKDIV_DMC1);
do {
tmp = __raw_readl(EXYNOS4_CLKDIV_STAT_DMC1);
} while (tmp & 0x111111);
/* Change Divider - TOP */
tmp = __raw_readl(EXYNOS4_CLKDIV_TOP);
tmp &= ~(EXYNOS4_CLKDIV_TOP_ACLK266_GPS_MASK |
EXYNOS4_CLKDIV_TOP_ACLK100_MASK |
EXYNOS4_CLKDIV_TOP_ACLK160_MASK |
EXYNOS4_CLKDIV_TOP_ACLK133_MASK |
EXYNOS4_CLKDIV_TOP_ONENAND_MASK);
tmp |= ((exynos4x12_clkdiv_top[index][0] <<
EXYNOS4_CLKDIV_TOP_ACLK266_GPS_SHIFT) |
(exynos4x12_clkdiv_top[index][1] <<
EXYNOS4_CLKDIV_TOP_ACLK100_SHIFT) |
(exynos4x12_clkdiv_top[index][2] <<
EXYNOS4_CLKDIV_TOP_ACLK160_SHIFT) |
(exynos4x12_clkdiv_top[index][3] <<
EXYNOS4_CLKDIV_TOP_ACLK133_SHIFT) |
(exynos4x12_clkdiv_top[index][4] <<
EXYNOS4_CLKDIV_TOP_ONENAND_SHIFT));
__raw_writel(tmp, EXYNOS4_CLKDIV_TOP);
do {
tmp = __raw_readl(EXYNOS4_CLKDIV_STAT_TOP);
} while (tmp & 0x11111);
/* Change Divider - LEFTBUS */
tmp = __raw_readl(EXYNOS4_CLKDIV_LEFTBUS);
tmp &= ~(EXYNOS4_CLKDIV_BUS_GDLR_MASK | EXYNOS4_CLKDIV_BUS_GPLR_MASK);
tmp |= ((exynos4x12_clkdiv_lr_bus[index][0] <<
EXYNOS4_CLKDIV_BUS_GDLR_SHIFT) |
(exynos4x12_clkdiv_lr_bus[index][1] <<
EXYNOS4_CLKDIV_BUS_GPLR_SHIFT));
__raw_writel(tmp, EXYNOS4_CLKDIV_LEFTBUS);
do {
tmp = __raw_readl(EXYNOS4_CLKDIV_STAT_LEFTBUS);
} while (tmp & 0x11);
/* Change Divider - RIGHTBUS */
tmp = __raw_readl(EXYNOS4_CLKDIV_RIGHTBUS);
tmp &= ~(EXYNOS4_CLKDIV_BUS_GDLR_MASK | EXYNOS4_CLKDIV_BUS_GPLR_MASK);
tmp |= ((exynos4x12_clkdiv_lr_bus[index][0] <<
EXYNOS4_CLKDIV_BUS_GDLR_SHIFT) |
(exynos4x12_clkdiv_lr_bus[index][1] <<
EXYNOS4_CLKDIV_BUS_GPLR_SHIFT));
__raw_writel(tmp, EXYNOS4_CLKDIV_RIGHTBUS);
do {
tmp = __raw_readl(EXYNOS4_CLKDIV_STAT_RIGHTBUS);
} while (tmp & 0x11);
/* Change Divider - MFC */
tmp = __raw_readl(EXYNOS4_CLKDIV_MFC);
tmp &= ~(EXYNOS4_CLKDIV_MFC_MASK);
tmp |= ((exynos4x12_clkdiv_sclkip[index][0] <<
EXYNOS4_CLKDIV_MFC_SHIFT));
__raw_writel(tmp, EXYNOS4_CLKDIV_MFC);
do {
tmp = __raw_readl(EXYNOS4_CLKDIV_STAT_MFC);
} while (tmp & 0x1);
/* Change Divider - JPEG */
tmp = __raw_readl(EXYNOS4_CLKDIV_CAM1);
tmp &= ~(EXYNOS4_CLKDIV_CAM1_JPEG_MASK);
tmp |= ((exynos4x12_clkdiv_sclkip[index][1] <<
EXYNOS4_CLKDIV_CAM1_JPEG_SHIFT));
__raw_writel(tmp, EXYNOS4_CLKDIV_CAM1);
do {
tmp = __raw_readl(EXYNOS4_CLKDIV_STAT_CAM1);
} while (tmp & 0x1);
/* Change Divider - FIMC0~3 */
tmp = __raw_readl(EXYNOS4_CLKDIV_CAM);
tmp &= ~(EXYNOS4_CLKDIV_CAM_FIMC0_MASK | EXYNOS4_CLKDIV_CAM_FIMC1_MASK |
EXYNOS4_CLKDIV_CAM_FIMC2_MASK | EXYNOS4_CLKDIV_CAM_FIMC3_MASK);
tmp |= ((exynos4x12_clkdiv_sclkip[index][2] <<
EXYNOS4_CLKDIV_CAM_FIMC0_SHIFT) |
(exynos4x12_clkdiv_sclkip[index][2] <<
EXYNOS4_CLKDIV_CAM_FIMC1_SHIFT) |
(exynos4x12_clkdiv_sclkip[index][2] <<
EXYNOS4_CLKDIV_CAM_FIMC2_SHIFT) |
(exynos4x12_clkdiv_sclkip[index][2] <<
EXYNOS4_CLKDIV_CAM_FIMC3_SHIFT));
__raw_writel(tmp, EXYNOS4_CLKDIV_CAM);
do {
tmp = __raw_readl(EXYNOS4_CLKDIV_STAT_CAM1);
} while (tmp & 0x1111);
return 0;
}
static int exynos4x12_get_intspec(unsigned long mifclk)
{
int i = 0;
while (exynos4x12_intclk_table[i].clk) {
if (exynos4x12_intclk_table[i].clk <= mifclk)
return i;
i++;
}
return -EINVAL;
}
static int exynos4_bus_setvolt(struct busfreq_data *data,
struct busfreq_opp_info *oppi,
struct busfreq_opp_info *oldoppi)
{
int err = 0, tmp;
unsigned long volt = oppi->volt;
switch (data->type) {
case TYPE_BUSF_EXYNOS4210:
/* OPP represents DMC clock + INT voltage */
err = regulator_set_voltage(data->vdd_int, volt,
MAX_SAFEVOLT);
break;
case TYPE_BUSF_EXYNOS4x12:
/* OPP represents MIF clock + MIF voltage */
err = regulator_set_voltage(data->vdd_mif, volt,
MAX_SAFEVOLT);
if (err)
break;
tmp = exynos4x12_get_intspec(oppi->rate);
if (tmp < 0) {
err = tmp;
regulator_set_voltage(data->vdd_mif,
oldoppi->volt,
MAX_SAFEVOLT);
break;
}
err = regulator_set_voltage(data->vdd_int,
exynos4x12_intclk_table[tmp].volt,
MAX_SAFEVOLT);
/* Try to recover */
if (err)
regulator_set_voltage(data->vdd_mif,
oldoppi->volt,
MAX_SAFEVOLT);
break;
default:
err = -EINVAL;
}
return err;
}
static int exynos4_bus_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 *data = platform_get_drvdata(pdev);
struct dev_pm_opp *opp;
unsigned long freq;
unsigned long old_freq = data->curr_oppinfo.rate;
struct busfreq_opp_info new_oppinfo;
rcu_read_lock();
opp = devfreq_recommended_opp(dev, _freq, flags);
if (IS_ERR(opp)) {
rcu_read_unlock();
return PTR_ERR(opp);
}
new_oppinfo.rate = dev_pm_opp_get_freq(opp);
new_oppinfo.volt = dev_pm_opp_get_voltage(opp);
rcu_read_unlock();
freq = new_oppinfo.rate;
if (old_freq == freq)
return 0;
dev_dbg(dev, "targeting %lukHz %luuV\n", freq, new_oppinfo.volt);
mutex_lock(&data->lock);
if (data->disabled)
goto out;
if (old_freq < freq)
err = exynos4_bus_setvolt(data, &new_oppinfo,
&data->curr_oppinfo);
if (err)
goto out;
if (old_freq != freq) {
switch (data->type) {
case TYPE_BUSF_EXYNOS4210:
err = exynos4210_set_busclk(data, &new_oppinfo);
break;
case TYPE_BUSF_EXYNOS4x12:
err = exynos4x12_set_busclk(data, &new_oppinfo);
break;
default:
err = -EINVAL;
}
}
if (err)
goto out;
if (old_freq > freq)
err = exynos4_bus_setvolt(data, &new_oppinfo,
&data->curr_oppinfo);
if (err)
goto out;
data->curr_oppinfo = new_oppinfo;
out:
mutex_unlock(&data->lock);
return err;
}
static int exynos4_bus_get_dev_status(struct device *dev,
struct devfreq_dev_status *stat)
{
struct busfreq_data *data = dev_get_drvdata(dev);
struct busfreq_ppmu_data *ppmu_data = &data->ppmu_data;
int busier;
exynos_read_ppmu(ppmu_data);
busier = exynos_get_busier_ppmu(ppmu_data);
stat->current_frequency = data->curr_oppinfo.rate;
/* Number of cycles spent on memory access */
stat->busy_time = ppmu_data->ppmu[busier].count[PPMU_PMNCNT3];
stat->busy_time *= 100 / BUS_SATURATION_RATIO;
stat->total_time = ppmu_data->ppmu[busier].ccnt;
/* If the counters have overflown, retry */
if (ppmu_data->ppmu[busier].ccnt_overflow ||
ppmu_data->ppmu[busier].count_overflow[0])
return -EAGAIN;
return 0;
}
static struct devfreq_dev_profile exynos4_devfreq_profile = {
.initial_freq = 400000,
.polling_ms = 50,
.target = exynos4_bus_target,
.get_dev_status = exynos4_bus_get_dev_status,
};
static int exynos4210_init_tables(struct busfreq_data *data)
{
u32 tmp;
int mgrp;
int i, err = 0;
tmp = __raw_readl(EXYNOS4_CLKDIV_DMC0);
for (i = LV_0; i < EX4210_LV_NUM; i++) {
tmp &= ~(EXYNOS4_CLKDIV_DMC0_ACP_MASK |
EXYNOS4_CLKDIV_DMC0_ACPPCLK_MASK |
EXYNOS4_CLKDIV_DMC0_DPHY_MASK |
EXYNOS4_CLKDIV_DMC0_DMC_MASK |
EXYNOS4_CLKDIV_DMC0_DMCD_MASK |
EXYNOS4_CLKDIV_DMC0_DMCP_MASK |
EXYNOS4_CLKDIV_DMC0_COPY2_MASK |
EXYNOS4_CLKDIV_DMC0_CORETI_MASK);
tmp |= ((exynos4210_clkdiv_dmc0[i][0] <<
EXYNOS4_CLKDIV_DMC0_ACP_SHIFT) |
(exynos4210_clkdiv_dmc0[i][1] <<
EXYNOS4_CLKDIV_DMC0_ACPPCLK_SHIFT) |
(exynos4210_clkdiv_dmc0[i][2] <<
EXYNOS4_CLKDIV_DMC0_DPHY_SHIFT) |
(exynos4210_clkdiv_dmc0[i][3] <<
EXYNOS4_CLKDIV_DMC0_DMC_SHIFT) |
(exynos4210_clkdiv_dmc0[i][4] <<
EXYNOS4_CLKDIV_DMC0_DMCD_SHIFT) |
(exynos4210_clkdiv_dmc0[i][5] <<
EXYNOS4_CLKDIV_DMC0_DMCP_SHIFT) |
(exynos4210_clkdiv_dmc0[i][6] <<
EXYNOS4_CLKDIV_DMC0_COPY2_SHIFT) |
(exynos4210_clkdiv_dmc0[i][7] <<
EXYNOS4_CLKDIV_DMC0_CORETI_SHIFT));
data->dmc_divtable[i] = tmp;
}
tmp = __raw_readl(EXYNOS4_CLKDIV_TOP);
for (i = LV_0; i < EX4210_LV_NUM; i++) {
tmp &= ~(EXYNOS4_CLKDIV_TOP_ACLK200_MASK |
EXYNOS4_CLKDIV_TOP_ACLK100_MASK |
EXYNOS4_CLKDIV_TOP_ACLK160_MASK |
EXYNOS4_CLKDIV_TOP_ACLK133_MASK |
EXYNOS4_CLKDIV_TOP_ONENAND_MASK);
tmp |= ((exynos4210_clkdiv_top[i][0] <<
EXYNOS4_CLKDIV_TOP_ACLK200_SHIFT) |
(exynos4210_clkdiv_top[i][1] <<
EXYNOS4_CLKDIV_TOP_ACLK100_SHIFT) |
(exynos4210_clkdiv_top[i][2] <<
EXYNOS4_CLKDIV_TOP_ACLK160_SHIFT) |
(exynos4210_clkdiv_top[i][3] <<
EXYNOS4_CLKDIV_TOP_ACLK133_SHIFT) |
(exynos4210_clkdiv_top[i][4] <<
EXYNOS4_CLKDIV_TOP_ONENAND_SHIFT));
data->top_divtable[i] = tmp;
}
/*
* TODO: init tmp based on busfreq_data
* (device-tree or platform-data)
*/
tmp = 0; /* Max voltages for the reliability of the unknown */
pr_debug("ASV Group of Exynos4 is %d\n", tmp);
/* Use merged grouping for voltage */
switch (tmp) {
case 0:
mgrp = 0;
break;
case 1:
case 2:
mgrp = 1;
break;
case 3:
case 4:
mgrp = 2;
break;
case 5:
case 6:
mgrp = 3;
break;
case 7:
mgrp = 4;
break;
default:
pr_warn("Unknown ASV Group. Use max voltage.\n");
mgrp = 0;
}
for (i = LV_0; i < EX4210_LV_NUM; i++)
exynos4210_busclk_table[i].volt = exynos4210_asv_volt[mgrp][i];
for (i = LV_0; i < EX4210_LV_NUM; i++) {
err = dev_pm_opp_add(data->dev, exynos4210_busclk_table[i].clk,
exynos4210_busclk_table[i].volt);
if (err) {
dev_err(data->dev, "Cannot add opp entries.\n");
return err;
}
}
return 0;
}
static int exynos4x12_init_tables(struct busfreq_data *data)
{
unsigned int i;
unsigned int tmp;
int ret;
/* Enable pause function for DREX2 DVFS */
tmp = __raw_readl(EXYNOS4_DMC_PAUSE_CTRL);
tmp |= EXYNOS4_DMC_PAUSE_ENABLE;
__raw_writel(tmp, EXYNOS4_DMC_PAUSE_CTRL);
tmp = __raw_readl(EXYNOS4_CLKDIV_DMC0);
for (i = 0; i < EX4x12_LV_NUM; i++) {
tmp &= ~(EXYNOS4_CLKDIV_DMC0_ACP_MASK |
EXYNOS4_CLKDIV_DMC0_ACPPCLK_MASK |
EXYNOS4_CLKDIV_DMC0_DPHY_MASK |
EXYNOS4_CLKDIV_DMC0_DMC_MASK |
EXYNOS4_CLKDIV_DMC0_DMCD_MASK |
EXYNOS4_CLKDIV_DMC0_DMCP_MASK);
tmp |= ((exynos4x12_clkdiv_dmc0[i][0] <<
EXYNOS4_CLKDIV_DMC0_ACP_SHIFT) |
(exynos4x12_clkdiv_dmc0[i][1] <<
EXYNOS4_CLKDIV_DMC0_ACPPCLK_SHIFT) |
(exynos4x12_clkdiv_dmc0[i][2] <<
EXYNOS4_CLKDIV_DMC0_DPHY_SHIFT) |
(exynos4x12_clkdiv_dmc0[i][3] <<
EXYNOS4_CLKDIV_DMC0_DMC_SHIFT) |
(exynos4x12_clkdiv_dmc0[i][4] <<
EXYNOS4_CLKDIV_DMC0_DMCD_SHIFT) |
(exynos4x12_clkdiv_dmc0[i][5] <<
EXYNOS4_CLKDIV_DMC0_DMCP_SHIFT));
data->dmc_divtable[i] = tmp;
}
tmp = 0; /* Max voltages for the reliability of the unknown */
if (tmp > 8)
tmp = 0;
pr_debug("ASV Group of Exynos4x12 is %d\n", tmp);
for (i = 0; i < EX4x12_LV_NUM; i++) {
exynos4x12_mifclk_table[i].volt =
exynos4x12_mif_step_50[tmp][i];
exynos4x12_intclk_table[i].volt =
exynos4x12_int_volt[tmp][i];
}
for (i = 0; i < EX4x12_LV_NUM; i++) {
ret = dev_pm_opp_add(data->dev, exynos4x12_mifclk_table[i].clk,
exynos4x12_mifclk_table[i].volt);
if (ret) {
dev_err(data->dev, "Fail to add opp entries.\n");
return ret;
}
}
return 0;
}
static int exynos4_busfreq_pm_notifier_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct busfreq_data *data = container_of(this, struct busfreq_data,
pm_notifier);
struct dev_pm_opp *opp;
struct busfreq_opp_info new_oppinfo;
unsigned long maxfreq = ULONG_MAX;
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();
dev_err(data->dev, "%s: unable to find a min freq\n",
__func__);
mutex_unlock(&data->lock);
return PTR_ERR(opp);
}
new_oppinfo.rate = dev_pm_opp_get_freq(opp);
new_oppinfo.volt = dev_pm_opp_get_voltage(opp);
rcu_read_unlock();
err = exynos4_bus_setvolt(data, &new_oppinfo,
&data->curr_oppinfo);
if (err)
goto unlock;
switch (data->type) {
case TYPE_BUSF_EXYNOS4210:
err = exynos4210_set_busclk(data, &new_oppinfo);
break;
case TYPE_BUSF_EXYNOS4x12:
err = exynos4x12_set_busclk(data, &new_oppinfo);
break;
default:
err = -EINVAL;
}
if (err)
goto unlock;
data->curr_oppinfo = new_oppinfo;
unlock:
mutex_unlock(&data->lock);
if (err)
return err;
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 exynos4_busfreq_probe(struct platform_device *pdev)
{
struct busfreq_data *data;
struct busfreq_ppmu_data *ppmu_data;
struct dev_pm_opp *opp;
struct device *dev = &pdev->dev;
int err = 0;
data = devm_kzalloc(&pdev->dev, sizeof(struct busfreq_data), 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;
}
data->type = pdev->id_entry->driver_data;
ppmu_data->ppmu[PPMU_DMC0].hw_base = S5P_VA_DMC0;
ppmu_data->ppmu[PPMU_DMC1].hw_base = S5P_VA_DMC1;
data->pm_notifier.notifier_call = exynos4_busfreq_pm_notifier_event;
data->dev = dev;
mutex_init(&data->lock);
switch (data->type) {
case TYPE_BUSF_EXYNOS4210:
err = exynos4210_init_tables(data);
break;
case TYPE_BUSF_EXYNOS4x12:
err = exynos4x12_init_tables(data);
break;
default:
dev_err(dev, "Cannot determine the device id %d\n", data->type);
err = -EINVAL;
}
if (err) {
dev_err(dev, "Cannot initialize busfreq table %d\n",
data->type);
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);
}
if (data->type == TYPE_BUSF_EXYNOS4x12) {
data->vdd_mif = devm_regulator_get(dev, "vdd_mif");
if (IS_ERR(data->vdd_mif)) {
dev_err(dev, "Cannot get the regulator \"vdd_mif\"\n");
return PTR_ERR(data->vdd_mif);
}
}
rcu_read_lock();
opp = dev_pm_opp_find_freq_floor(dev,
&exynos4_devfreq_profile.initial_freq);
if (IS_ERR(opp)) {
rcu_read_unlock();
dev_err(dev, "Invalid initial frequency %lu kHz.\n",
exynos4_devfreq_profile.initial_freq);
return PTR_ERR(opp);
}
data->curr_oppinfo.rate = dev_pm_opp_get_freq(opp);
data->curr_oppinfo.volt = dev_pm_opp_get_voltage(opp);
rcu_read_unlock();
platform_set_drvdata(pdev, data);
data->devfreq = devm_devfreq_add_device(dev, &exynos4_devfreq_profile,
"simple_ondemand", NULL);
if (IS_ERR(data->devfreq))
return PTR_ERR(data->devfreq);
/*
* Start PPMU (Performance Profiling Monitoring Unit) to check
* utilization of each IP in the Exynos4 SoC.
*/
busfreq_mon_reset(ppmu_data);
/* Register opp_notifier for Exynos4 busfreq */
err = devm_devfreq_register_opp_notifier(dev, data->devfreq);
if (err < 0) {
dev_err(dev, "Failed to register opp notifier\n");
return err;
}
/* Register pm_notifier for Exynos4 busfreq */
err = register_pm_notifier(&data->pm_notifier);
if (err) {
dev_err(dev, "Failed to setup pm notifier\n");
return err;
}
return 0;
}
static int exynos4_busfreq_remove(struct platform_device *pdev)
{
struct busfreq_data *data = platform_get_drvdata(pdev);
/* Unregister all of notifier chain */
unregister_pm_notifier(&data->pm_notifier);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int exynos4_busfreq_resume(struct device *dev)
{
struct busfreq_data *data = dev_get_drvdata(dev);
struct busfreq_ppmu_data *ppmu_data = &data->ppmu_data;
busfreq_mon_reset(ppmu_data);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(exynos4_busfreq_pm_ops, NULL, exynos4_busfreq_resume);
static const struct platform_device_id exynos4_busfreq_id[] = {
{ "exynos4210-busfreq", TYPE_BUSF_EXYNOS4210 },
{ "exynos4412-busfreq", TYPE_BUSF_EXYNOS4x12 },
{ "exynos4212-busfreq", TYPE_BUSF_EXYNOS4x12 },
{ },
};
static struct platform_driver exynos4_busfreq_driver = {
.probe = exynos4_busfreq_probe,
.remove = exynos4_busfreq_remove,
.id_table = exynos4_busfreq_id,
.driver = {
.name = "exynos4-busfreq",
.pm = &exynos4_busfreq_pm_ops,
},
};
static int __init exynos4_busfreq_init(void)
{
return platform_driver_register(&exynos4_busfreq_driver);
}
late_initcall(exynos4_busfreq_init);
static void __exit exynos4_busfreq_exit(void)
{
platform_driver_unregister(&exynos4_busfreq_driver);
}
module_exit(exynos4_busfreq_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("EXYNOS4 busfreq driver with devfreq framework");
MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
drivers/devfreq/exynos/exynos4_bus.h deleted 100644 → 0
View file @ 38279cac
/*
* 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 deleted 100644 → 0
View file @ 38279cac
/*
* 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 deleted 100644 → 0
View file @ 38279cac
/*
* 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 deleted 100644 → 0
View file @ 38279cac
/*
* 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 */
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