PWN-Hunter/android_kernel_xiaomi_sdm845
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[Blackfin] arch: Functional power management support: Add CPU and platform voltage scaling support

Browse Source 
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Michael Hennerich 2008-05-07 11:41:26 +08:00 committed by Bryan Wu
parent 19d6d7d53c
commit 14b03204c8
15 changed files with 468 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
arch/blackfin/Kconfig
View File

@ -967,6 +967,17 @@ menu "CPU Frequency scaling"
source "drivers/cpufreq/Kconfig"
config CPU_VOLTAGE
bool "CPU Voltage scaling"
depends on EXPERIMENTAL
depends on CPU_FREQ
default n
help
Say Y here if you want CPU voltage scaling according to the CPU frequency.
This option violates the PLL BYPASS recommendation in the Blackfin Processor
manuals. There is a theoretical risk that during VDDINT transitions
the PLL may unlock.
endmenu
source "net/Kconfig"

26
arch/blackfin/mach-bf527/boards/ezkit.c
View File

@ -50,6 +50,7 @@
#include <asm/reboot.h>
#include <asm/nand.h>
#include <asm/portmux.h>
#include <asm/dpmc.h>
#include <linux/spi/ad7877.h>
/*
@ -839,7 +840,32 @@ static struct platform_device bfin_gpios_device = {
.resource = &bfin_gpios_resources,
};
static const unsigned int cclk_vlev_datasheet[] =
{
VRPAIR(VLEV_100, 400000000),
VRPAIR(VLEV_105, 426000000),
VRPAIR(VLEV_110, 500000000),
VRPAIR(VLEV_115, 533000000),
VRPAIR(VLEV_120, 600000000),
};
static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = {
.tuple_tab = cclk_vlev_datasheet,
.tabsize = ARRAY_SIZE(cclk_vlev_datasheet),
.vr_settling_time = 25 /* us */,
};
static struct platform_device bfin_dpmc = {
.name = "bfin dpmc",
.dev = {
.platform_data = &bfin_dmpc_vreg_data,
},
};
static struct platform_device *stamp_devices[] __initdata = {
&bfin_dpmc,
#if defined(CONFIG_MTD_NAND_BF5XX) || defined(CONFIG_MTD_NAND_BF5XX_MODULE)
&bf5xx_nand_device,
#endif

31
arch/blackfin/mach-bf533/boards/cm_bf533.c
View File

@ -39,6 +39,7 @@
#include <asm/dma.h>
#include <asm/bfin5xx_spi.h>
#include <asm/portmux.h>
#include <asm/dpmc.h>
/*
* Name the Board for the /proc/cpuinfo
@ -341,7 +342,37 @@ static struct platform_device bfin_pata_device = {
};
#endif
static const unsigned int cclk_vlev_datasheet[] =
{
VRPAIR(VLEV_085, 250000000),
VRPAIR(VLEV_090, 376000000),
VRPAIR(VLEV_095, 426000000),
VRPAIR(VLEV_100, 426000000),
VRPAIR(VLEV_105, 476000000),
VRPAIR(VLEV_110, 476000000),
VRPAIR(VLEV_115, 476000000),
VRPAIR(VLEV_120, 600000000),
VRPAIR(VLEV_125, 600000000),
VRPAIR(VLEV_130, 600000000),
};
static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = {
.tuple_tab = cclk_vlev_datasheet,
.tabsize = ARRAY_SIZE(cclk_vlev_datasheet),
.vr_settling_time = 25 /* us */,
};
static struct platform_device bfin_dpmc = {
.name = "bfin dpmc",
.dev = {
.platform_data = &bfin_dmpc_vreg_data,
},
};
static struct platform_device *cm_bf533_devices[] __initdata = {
&bfin_dpmc,
#if defined(CONFIG_SERIAL_BFIN) || defined(CONFIG_SERIAL_BFIN_MODULE)
&bfin_uart_device,
#endif

31
arch/blackfin/mach-bf533/boards/ezkit.c
View File

@ -42,6 +42,7 @@
#include <asm/dma.h>
#include <asm/bfin5xx_spi.h>
#include <asm/portmux.h>
#include <asm/dpmc.h>
/*
* Name the Board for the /proc/cpuinfo
@ -350,7 +351,37 @@ static struct platform_device i2c_gpio_device = {
};
#endif
static const unsigned int cclk_vlev_datasheet[] =
{
VRPAIR(VLEV_085, 250000000),
VRPAIR(VLEV_090, 376000000),
VRPAIR(VLEV_095, 426000000),
VRPAIR(VLEV_100, 426000000),
VRPAIR(VLEV_105, 476000000),
VRPAIR(VLEV_110, 476000000),
VRPAIR(VLEV_115, 476000000),
VRPAIR(VLEV_120, 600000000),
VRPAIR(VLEV_125, 600000000),
VRPAIR(VLEV_130, 600000000),
};
static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = {
.tuple_tab = cclk_vlev_datasheet,
.tabsize = ARRAY_SIZE(cclk_vlev_datasheet),
.vr_settling_time = 25 /* us */,
};
static struct platform_device bfin_dpmc = {
.name = "bfin dpmc",
.dev = {
.platform_data = &bfin_dmpc_vreg_data,
},
};
static struct platform_device *ezkit_devices[] __initdata = {
&bfin_dpmc,
#if defined(CONFIG_SMC91X) || defined(CONFIG_SMC91X_MODULE)
&smc91x_device,
#endif

31
arch/blackfin/mach-bf533/boards/stamp.c
View File

@ -45,6 +45,7 @@
#include <asm/bfin5xx_spi.h>
#include <asm/reboot.h>
#include <asm/portmux.h>
#include <asm/dpmc.h>
/*
* Name the Board for the /proc/cpuinfo
@ -516,7 +517,37 @@ static struct i2c_board_info __initdata bfin_i2c_board_info[] = {
};
#endif
static const unsigned int cclk_vlev_datasheet[] =
{
VRPAIR(VLEV_085, 250000000),
VRPAIR(VLEV_090, 376000000),
VRPAIR(VLEV_095, 426000000),
VRPAIR(VLEV_100, 426000000),
VRPAIR(VLEV_105, 476000000),
VRPAIR(VLEV_110, 476000000),
VRPAIR(VLEV_115, 476000000),
VRPAIR(VLEV_120, 600000000),
VRPAIR(VLEV_125, 600000000),
VRPAIR(VLEV_130, 600000000),
};
static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = {
.tuple_tab = cclk_vlev_datasheet,
.tabsize = ARRAY_SIZE(cclk_vlev_datasheet),
.vr_settling_time = 25 /* us */,
};
static struct platform_device bfin_dpmc = {
.name = "bfin dpmc",
.dev = {
.platform_data = &bfin_dmpc_vreg_data,
},
};
static struct platform_device *stamp_devices[] __initdata = {
&bfin_dpmc,
#if defined(CONFIG_RTC_DRV_BFIN) || defined(CONFIG_RTC_DRV_BFIN_MODULE)
&rtc_device,
#endif

31
arch/blackfin/mach-bf537/boards/cm_bf537.c
View File

@ -41,6 +41,7 @@
#include <asm/dma.h>
#include <asm/bfin5xx_spi.h>
#include <asm/portmux.h>
#include <asm/dpmc.h>
/*
* Name the Board for the /proc/cpuinfo
@ -428,7 +429,37 @@ static struct platform_device bfin_pata_device = {
};
#endif
static const unsigned int cclk_vlev_datasheet[] =
{
VRPAIR(VLEV_085, 250000000),
VRPAIR(VLEV_090, 376000000),
VRPAIR(VLEV_095, 426000000),
VRPAIR(VLEV_100, 426000000),
VRPAIR(VLEV_105, 476000000),
VRPAIR(VLEV_110, 476000000),
VRPAIR(VLEV_115, 476000000),
VRPAIR(VLEV_120, 500000000),
VRPAIR(VLEV_125, 533000000),
VRPAIR(VLEV_130, 600000000),
};
static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = {
.tuple_tab = cclk_vlev_datasheet,
.tabsize = ARRAY_SIZE(cclk_vlev_datasheet),
.vr_settling_time = 25 /* us */,
};
static struct platform_device bfin_dpmc = {
.name = "bfin dpmc",
.dev = {
.platform_data = &bfin_dmpc_vreg_data,
},
};
static struct platform_device *cm_bf537_devices[] __initdata = {
&bfin_dpmc,
#if defined(CONFIG_FB_HITACHI_TX09) || defined(CONFIG_FB_HITACHI_TX09_MODULE)
&hitachi_fb_device,
#endif

31
arch/blackfin/mach-bf537/boards/stamp.c
View File

@ -47,6 +47,7 @@
#include <asm/bfin5xx_spi.h>
#include <asm/reboot.h>
#include <asm/portmux.h>
#include <asm/dpmc.h>
#include <linux/spi/ad7877.h>
/*
@ -817,7 +818,37 @@ static struct platform_device bfin_pata_device = {
};
#endif
static const unsigned int cclk_vlev_datasheet[] =
{
VRPAIR(VLEV_085, 250000000),
VRPAIR(VLEV_090, 376000000),
VRPAIR(VLEV_095, 426000000),
VRPAIR(VLEV_100, 426000000),
VRPAIR(VLEV_105, 476000000),
VRPAIR(VLEV_110, 476000000),
VRPAIR(VLEV_115, 476000000),
VRPAIR(VLEV_120, 500000000),
VRPAIR(VLEV_125, 533000000),
VRPAIR(VLEV_130, 600000000),
};
static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = {
.tuple_tab = cclk_vlev_datasheet,
.tabsize = ARRAY_SIZE(cclk_vlev_datasheet),
.vr_settling_time = 25 /* us */,
};
static struct platform_device bfin_dpmc = {
.name = "bfin dpmc",
.dev = {
.platform_data = &bfin_dmpc_vreg_data,
},
};
static struct platform_device *stamp_devices[] __initdata = {
&bfin_dpmc,
#if defined(CONFIG_BFIN_CFPCMCIA) || defined(CONFIG_BFIN_CFPCMCIA_MODULE)
&bfin_pcmcia_cf_device,
#endif

32
arch/blackfin/mach-bf548/boards/cm_bf548.c
View File

@ -44,6 +44,7 @@
#include <asm/nand.h>
#include <asm/portmux.h>
#include <asm/mach/bf54x_keys.h>
#include <asm/dpmc.h>
#include <linux/input.h>
#include <linux/spi/ad7877.h>
@ -590,7 +591,38 @@ static struct platform_device bfin_device_gpiokeys = {
};
#endif
static const unsigned int cclk_vlev_datasheet[] =
{
/*
* Internal VLEV BF54XSBBC1533
****temporarily using these values until data sheet is updated
*/
VRPAIR(VLEV_085, 150000000),
VRPAIR(VLEV_090, 250000000),
VRPAIR(VLEV_110, 276000000),
VRPAIR(VLEV_115, 301000000),
VRPAIR(VLEV_120, 525000000),
VRPAIR(VLEV_125, 550000000),
VRPAIR(VLEV_130, 600000000),
};
static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = {
.tuple_tab = cclk_vlev_datasheet,
.tabsize = ARRAY_SIZE(cclk_vlev_datasheet),
.vr_settling_time = 25 /* us */,
};
static struct platform_device bfin_dpmc = {
.name = "bfin dpmc",
.dev = {
.platform_data = &bfin_dmpc_vreg_data,
},
};
static struct platform_device *cm_bf548_devices[] __initdata = {
&bfin_dpmc,
#if defined(CONFIG_RTC_DRV_BFIN) || defined(CONFIG_RTC_DRV_BFIN_MODULE)
&rtc_device,
#endif

32
arch/blackfin/mach-bf548/boards/ezkit.c
View File

@ -46,6 +46,7 @@
#include <asm/dma.h>
#include <asm/gpio.h>
#include <asm/nand.h>
#include <asm/dpmc.h>
#include <asm/portmux.h>
#include <asm/mach/bf54x_keys.h>
#include <linux/input.h>
@ -689,7 +690,38 @@ static struct platform_device bfin_gpios_device = {
.resource = &bfin_gpios_resources,
};
static const unsigned int cclk_vlev_datasheet[] =
{
/*
* Internal VLEV BF54XSBBC1533
****temporarily using these values until data sheet is updated
*/
VRPAIR(VLEV_085, 150000000),
VRPAIR(VLEV_090, 250000000),
VRPAIR(VLEV_110, 276000000),
VRPAIR(VLEV_115, 301000000),
VRPAIR(VLEV_120, 525000000),
VRPAIR(VLEV_125, 550000000),
VRPAIR(VLEV_130, 600000000),
};
static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = {
.tuple_tab = cclk_vlev_datasheet,
.tabsize = ARRAY_SIZE(cclk_vlev_datasheet),
.vr_settling_time = 25 /* us */,
};
static struct platform_device bfin_dpmc = {
.name = "bfin dpmc",
.dev = {
.platform_data = &bfin_dmpc_vreg_data,
},
};
static struct platform_device *ezkit_devices[] __initdata = {
&bfin_dpmc,
#if defined(CONFIG_RTC_DRV_BFIN) || defined(CONFIG_RTC_DRV_BFIN_MODULE)
&rtc_device,
#endif

30
arch/blackfin/mach-bf561/boards/cm_bf561.c
View File

@ -39,6 +39,7 @@
#include <asm/dma.h>
#include <asm/bfin5xx_spi.h>
#include <asm/portmux.h>
#include <asm/dpmc.h>
/*
* Name the Board for the /proc/cpuinfo
@ -339,8 +340,37 @@ static struct platform_device bfin_pata_device = {
};
#endif
static const unsigned int cclk_vlev_datasheet[] =
{
VRPAIR(VLEV_085, 250000000),
VRPAIR(VLEV_090, 300000000),
VRPAIR(VLEV_095, 313000000),
VRPAIR(VLEV_100, 350000000),
VRPAIR(VLEV_105, 400000000),
VRPAIR(VLEV_110, 444000000),
VRPAIR(VLEV_115, 450000000),
VRPAIR(VLEV_120, 475000000),
VRPAIR(VLEV_125, 500000000),
VRPAIR(VLEV_130, 600000000),
};
static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = {
.tuple_tab = cclk_vlev_datasheet,
.tabsize = ARRAY_SIZE(cclk_vlev_datasheet),
.vr_settling_time = 25 /* us */,
};
static struct platform_device bfin_dpmc = {
.name = "bfin dpmc",
.dev = {
.platform_data = &bfin_dmpc_vreg_data,
},
};
static struct platform_device *cm_bf561_devices[] __initdata = {
&bfin_dpmc,
#if defined(CONFIG_FB_HITACHI_TX09) || defined(CONFIG_FB_HITACHI_TX09_MODULE)
&hitachi_fb_device,
#endif

31
arch/blackfin/mach-bf561/boards/ezkit.c
View File

@ -39,6 +39,7 @@
#include <asm/dma.h>
#include <asm/bfin5xx_spi.h>
#include <asm/portmux.h>
#include <asm/dpmc.h>
/*
* Name the Board for the /proc/cpuinfo
@ -443,7 +444,37 @@ static struct platform_device i2c_gpio_device = {
};
#endif
static const unsigned int cclk_vlev_datasheet[] =
{
VRPAIR(VLEV_085, 250000000),
VRPAIR(VLEV_090, 300000000),
VRPAIR(VLEV_095, 313000000),
VRPAIR(VLEV_100, 350000000),
VRPAIR(VLEV_105, 400000000),
VRPAIR(VLEV_110, 444000000),
VRPAIR(VLEV_115, 450000000),
VRPAIR(VLEV_120, 475000000),
VRPAIR(VLEV_125, 500000000),
VRPAIR(VLEV_130, 600000000),
};
static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = {
.tuple_tab = cclk_vlev_datasheet,
.tabsize = ARRAY_SIZE(cclk_vlev_datasheet),
.vr_settling_time = 25 /* us */,
};
static struct platform_device bfin_dpmc = {
.name = "bfin dpmc",
.dev = {
.platform_data = &bfin_dmpc_vreg_data,
},
};
static struct platform_device *ezkit_devices[] __initdata = {
&bfin_dpmc,
#if defined(CONFIG_SMC91X) || defined(CONFIG_SMC91X_MODULE)
&smc91x_device,
#endif

5
arch/blackfin/mach-common/Makefile
View File

@ -6,5 +6,6 @@ obj-y := \
cache.o cacheinit.o entry.o \
interrupt.o lock.o irqpanic.o arch_checks.o ints-priority.o
obj-$(CONFIG_PM) += pm.o dpmc.o
obj-$(CONFIG_CPU_FREQ) += cpufreq.o
obj-$(CONFIG_PM) += pm.o dpmc_modes.o
obj-$(CONFIG_CPU_FREQ) += cpufreq.o
obj-$(CONFIG_CPU_VOLTAGE) += dpmc.o

137
arch/blackfin/mach-common/dpmc.c Normal file
View File

@ -0,0 +1,137 @@
/*
* Copyright 2008 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#include <linux/cdev.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/types.h>
#include <linux/cpufreq.h>
#include <asm/delay.h>
#include <asm/dpmc.h>
#define DRIVER_NAME "bfin dpmc"
#define dprintk(msg...) \
cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, DRIVER_NAME, msg)
struct bfin_dpmc_platform_data *pdata;
/**
* bfin_set_vlev - Update VLEV field in VR_CTL Reg.
* Avoid BYPASS sequence
*/
static void bfin_set_vlev(unsigned int vlev)
{
unsigned pll_lcnt;
pll_lcnt = bfin_read_PLL_LOCKCNT();
bfin_write_PLL_LOCKCNT(1);
bfin_write_VR_CTL((bfin_read_VR_CTL() & ~VLEV) | vlev);
bfin_write_PLL_LOCKCNT(pll_lcnt);
}
/**
* bfin_get_vlev - Get CPU specific VLEV from platform device data
*/
static unsigned int bfin_get_vlev(unsigned int freq)
{
int i;
if (!pdata)
goto err_out;
freq >>= 16;
for (i = 0; i < pdata->tabsize; i++)
if (freq <= (pdata->tuple_tab[i] & 0xFFFF))
return pdata->tuple_tab[i] >> 16;
err_out:
printk(KERN_WARNING "DPMC: No suitable CCLK VDDINT voltage pair found\n");
return VLEV_120;
}
#ifdef CONFIG_CPU_FREQ
static int
vreg_cpufreq_notifier(struct notifier_block *nb, unsigned long val, void *data)
{
struct cpufreq_freqs *freq = data;
if (val == CPUFREQ_PRECHANGE && freq->old < freq->new) {
bfin_set_vlev(bfin_get_vlev(freq->new));
udelay(pdata->vr_settling_time); /* Wait until Volatge settled */
} else if (val == CPUFREQ_POSTCHANGE && freq->old > freq->new)
bfin_set_vlev(bfin_get_vlev(freq->new));
return 0;
}
static struct notifier_block vreg_cpufreq_notifier_block = {
.notifier_call = vreg_cpufreq_notifier
};
#endif /* CONFIG_CPU_FREQ */
/**
* bfin_dpmc_probe -
*
*/
static int __devinit bfin_dpmc_probe(struct platform_device *pdev)
{
if (pdev->dev.platform_data)
pdata = pdev->dev.platform_data;
else
return -EINVAL;
return cpufreq_register_notifier(&vreg_cpufreq_notifier_block,
CPUFREQ_TRANSITION_NOTIFIER);
}
/**
* bfin_dpmc_remove -
*/
static int __devexit bfin_dpmc_remove(struct platform_device *pdev)
{
pdata = NULL;
return cpufreq_unregister_notifier(&vreg_cpufreq_notifier_block,
CPUFREQ_TRANSITION_NOTIFIER);
}
struct platform_driver bfin_dpmc_device_driver = {
.probe = bfin_dpmc_probe,
.remove = __devexit_p(bfin_dpmc_remove),
.driver = {
.name = DRIVER_NAME,
}
};
/**
* bfin_dpmc_init - Init driver
*/
static int __init bfin_dpmc_init(void)
{
return platform_driver_register(&bfin_dpmc_device_driver);
}
module_init(bfin_dpmc_init);
/**
* bfin_dpmc_exit - break down driver
*/
static void __exit bfin_dpmc_exit(void)
{
platform_driver_unregister(&bfin_dpmc_device_driver);
}
module_exit(bfin_dpmc_exit);
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("cpu power management driver for Blackfin");
MODULE_LICENSE("GPL");

27
arch/blackfin/mach-common/dpmc.S → arch/blackfin/mach-common/dpmc_modes.S
View File

@ -1,30 +1,7 @@
/*
* File: arch/blackfin/mach-common/dpmc.S
* Based on:
* Author: LG Soft India
* Copyright 2004-2008 Analog Devices Inc.
*
* Created: ?
* Description: Watchdog Timer APIs
*
* Modified:
* Copyright 2004-2006 Analog Devices Inc.
*
* Bugs: Enter bugs at http://blackfin.uclinux.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; either version 2 of the License, or
* (at your option) any later version.
*
* 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, see the file COPYING, or write
* to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
* Licensed under the GPL-2 or later.
*/
#include <linux/linkage.h>

10
include/asm-blackfin/dpmc.h
View File

@ -1,7 +1,7 @@
/*
* include/asm-blackfin/dpmc.h - Miscellaneous IOCTL commands for Dynamic Power
* Management Controller Driver.
* Copyright (C) 2004 Analog Device Inc.
* Copyright (C) 2004-2008 Analog Device Inc.
*
*/
#ifndef _BLACKFIN_DPMC_H_
@ -65,6 +65,14 @@ void disable_wdog_timer(void);
extern unsigned long get_cclk(void);
extern unsigned long get_sclk(void);
struct bfin_dpmc_platform_data {
const unsigned int *tuple_tab;
unsigned short tabsize;
unsigned short vr_settling_time; /* in us */
};
#define VRPAIR(vlev, freq) (((vlev) << 16) | ((freq) >> 16))
#endif /* __KERNEL__ */
#endif /*_BLACKFIN_DPMC_H_*/