mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 13:22:23 +00:00
8558643d03
Fix the use of __raw accesors in pm-common.c to use the _relaxed variants to deal with any issues due to endian related fetches. Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/*
|
|
* Copyright (C) 2013 Samsung Electronics Co., Ltd.
|
|
* Tomasz Figa <t.figa@samsung.com>
|
|
* Copyright (C) 2008 Openmoko, Inc.
|
|
* Copyright (C) 2004-2008 Simtec Electronics
|
|
* Ben Dooks <ben@simtec.co.uk>
|
|
* http://armlinux.simtec.co.uk/
|
|
*
|
|
* Samsung common power management helper functions.
|
|
*
|
|
* 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/kernel.h>
|
|
|
|
#include <plat/pm-common.h>
|
|
|
|
/* helper functions to save and restore register state */
|
|
|
|
/**
|
|
* s3c_pm_do_save() - save a set of registers for restoration on resume.
|
|
* @ptr: Pointer to an array of registers.
|
|
* @count: Size of the ptr array.
|
|
*
|
|
* Run through the list of registers given, saving their contents in the
|
|
* array for later restoration when we wakeup.
|
|
*/
|
|
void s3c_pm_do_save(struct sleep_save *ptr, int count)
|
|
{
|
|
for (; count > 0; count--, ptr++) {
|
|
ptr->val = readl_relaxed(ptr->reg);
|
|
S3C_PMDBG("saved %p value %08lx\n", ptr->reg, ptr->val);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* s3c_pm_do_restore() - restore register values from the save list.
|
|
* @ptr: Pointer to an array of registers.
|
|
* @count: Size of the ptr array.
|
|
*
|
|
* Restore the register values saved from s3c_pm_do_save().
|
|
*
|
|
* Note, we do not use S3C_PMDBG() in here, as the system may not have
|
|
* restore the UARTs state yet
|
|
*/
|
|
|
|
void s3c_pm_do_restore(const struct sleep_save *ptr, int count)
|
|
{
|
|
for (; count > 0; count--, ptr++) {
|
|
pr_debug("restore %p (restore %08lx, was %08x)\n",
|
|
ptr->reg, ptr->val, readl_relaxed(ptr->reg));
|
|
|
|
writel_relaxed(ptr->val, ptr->reg);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* s3c_pm_do_restore_core() - early restore register values from save list.
|
|
*
|
|
* This is similar to s3c_pm_do_restore() except we try and minimise the
|
|
* side effects of the function in case registers that hardware might need
|
|
* to work has been restored.
|
|
*
|
|
* WARNING: Do not put any debug in here that may effect memory or use
|
|
* peripherals, as things may be changing!
|
|
*/
|
|
|
|
void s3c_pm_do_restore_core(const struct sleep_save *ptr, int count)
|
|
{
|
|
for (; count > 0; count--, ptr++)
|
|
writel_relaxed(ptr->val, ptr->reg);
|
|
}
|