linux/arch/arm/mach-davinci/pm.c
Alexey Dobriyan b7f080cfe2 net: remove mm.h inclusion from netdevice.h
Remove linux/mm.h inclusion from netdevice.h -- it's unused (I've checked manually).

To prevent mm.h inclusion via other channels also extract "enum dma_data_direction"
definition into separate header. This tiny piece is what gluing netdevice.h with mm.h
via "netdevice.h => dmaengine.h => dma-mapping.h => scatterlist.h => mm.h".
Removal of mm.h from scatterlist.h was tried and was found not feasible
on most archs, so the link was cutoff earlier.

Hope people are OK with tiny include file.

Note, that mm_types.h is still dragged in, but it is a separate story.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-21 19:17:20 -07:00

160 lines
3.8 KiB
C

/*
* DaVinci Power Management Routines
*
* Copyright (C) 2009 Texas Instruments, Inc. http://www.ti.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/pm.h>
#include <linux/suspend.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/spinlock.h>
#include <asm/cacheflush.h>
#include <asm/delay.h>
#include <asm/io.h>
#include <mach/da8xx.h>
#include <mach/sram.h>
#include <mach/pm.h>
#include "clock.h"
#define DEEPSLEEP_SLEEPCOUNT_MASK 0xFFFF
static void (*davinci_sram_suspend) (struct davinci_pm_config *);
static struct davinci_pm_config *pdata;
static void davinci_sram_push(void *dest, void *src, unsigned int size)
{
memcpy(dest, src, size);
flush_icache_range((unsigned long)dest, (unsigned long)(dest + size));
}
static void davinci_pm_suspend(void)
{
unsigned val;
if (pdata->cpupll_reg_base != pdata->ddrpll_reg_base) {
/* Switch CPU PLL to bypass mode */
val = __raw_readl(pdata->cpupll_reg_base + PLLCTL);
val &= ~(PLLCTL_PLLENSRC | PLLCTL_PLLEN);
__raw_writel(val, pdata->cpupll_reg_base + PLLCTL);
udelay(PLL_BYPASS_TIME);
/* Powerdown CPU PLL */
val = __raw_readl(pdata->cpupll_reg_base + PLLCTL);
val |= PLLCTL_PLLPWRDN;
__raw_writel(val, pdata->cpupll_reg_base + PLLCTL);
}
/* Configure sleep count in deep sleep register */
val = __raw_readl(pdata->deepsleep_reg);
val &= ~DEEPSLEEP_SLEEPCOUNT_MASK,
val |= pdata->sleepcount;
__raw_writel(val, pdata->deepsleep_reg);
/* System goes to sleep in this call */
davinci_sram_suspend(pdata);
if (pdata->cpupll_reg_base != pdata->ddrpll_reg_base) {
/* put CPU PLL in reset */
val = __raw_readl(pdata->cpupll_reg_base + PLLCTL);
val &= ~PLLCTL_PLLRST;
__raw_writel(val, pdata->cpupll_reg_base + PLLCTL);
/* put CPU PLL in power down */
val = __raw_readl(pdata->cpupll_reg_base + PLLCTL);
val &= ~PLLCTL_PLLPWRDN;
__raw_writel(val, pdata->cpupll_reg_base + PLLCTL);
/* wait for CPU PLL reset */
udelay(PLL_RESET_TIME);
/* bring CPU PLL out of reset */
val = __raw_readl(pdata->cpupll_reg_base + PLLCTL);
val |= PLLCTL_PLLRST;
__raw_writel(val, pdata->cpupll_reg_base + PLLCTL);
/* Wait for CPU PLL to lock */
udelay(PLL_LOCK_TIME);
/* Remove CPU PLL from bypass mode */
val = __raw_readl(pdata->cpupll_reg_base + PLLCTL);
val &= ~PLLCTL_PLLENSRC;
val |= PLLCTL_PLLEN;
__raw_writel(val, pdata->cpupll_reg_base + PLLCTL);
}
}
static int davinci_pm_enter(suspend_state_t state)
{
int ret = 0;
switch (state) {
case PM_SUSPEND_STANDBY:
case PM_SUSPEND_MEM:
davinci_pm_suspend();
break;
default:
ret = -EINVAL;
}
return ret;
}
static const struct platform_suspend_ops davinci_pm_ops = {
.enter = davinci_pm_enter,
.valid = suspend_valid_only_mem,
};
static int __init davinci_pm_probe(struct platform_device *pdev)
{
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "cannot get platform data\n");
return -ENOENT;
}
davinci_sram_suspend = sram_alloc(davinci_cpu_suspend_sz, NULL);
if (!davinci_sram_suspend) {
dev_err(&pdev->dev, "cannot allocate SRAM memory\n");
return -ENOMEM;
}
davinci_sram_push(davinci_sram_suspend, davinci_cpu_suspend,
davinci_cpu_suspend_sz);
suspend_set_ops(&davinci_pm_ops);
return 0;
}
static int __exit davinci_pm_remove(struct platform_device *pdev)
{
sram_free(davinci_sram_suspend, davinci_cpu_suspend_sz);
return 0;
}
static struct platform_driver davinci_pm_driver = {
.driver = {
.name = "pm-davinci",
.owner = THIS_MODULE,
},
.remove = __exit_p(davinci_pm_remove),
};
static int __init davinci_pm_init(void)
{
return platform_driver_probe(&davinci_pm_driver, davinci_pm_probe);
}
late_initcall(davinci_pm_init);