mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 14:14:01 +08:00
4490e3c688
Replace GPL license statements with SPDX license identifiers (GPL-1.0+, GPL-2.0 and GPL-2.0+). Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
//
|
|
// 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.
|
|
|
|
#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);
|
|
}
|