linux/arch/arm/mach-s3c/sleep-s3c2410.S
Arnd Bergmann c6ff132d42 ARM: s3c: make headers local if possible
A lot of header files are only used internally now, so they can be moved
to mach-s3c, out of the visibility of drivers.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20200806182059.2431-40-krzk@kernel.org
[krzk: Rebase and fixup leds-s3c24xx driver]
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
2020-08-22 13:02:02 +02:00

55 lines
1.3 KiB
ArmAsm

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2004 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
*
* S3C2410 Power Manager (Suspend-To-RAM) support
*
* Based on PXA/SA1100 sleep code by:
* Nicolas Pitre, (c) 2002 Monta Vista Software Inc
* Cliff Brake, (c) 2001
*/
#include <linux/linkage.h>
#include <linux/serial_s3c.h>
#include <asm/assembler.h>
#include "map.h"
#include "regs-gpio.h"
#include "regs-clock.h"
#include "regs-mem-s3c24xx.h"
/* s3c2410_cpu_suspend
*
* put the cpu into sleep mode
*/
ENTRY(s3c2410_cpu_suspend)
@@ prepare cpu to sleep
ldr r4, =S3C2410_REFRESH
ldr r5, =S3C24XX_MISCCR
ldr r6, =S3C2410_CLKCON
ldr r7, [r4] @ get REFRESH (and ensure in TLB)
ldr r8, [r5] @ get MISCCR (and ensure in TLB)
ldr r9, [r6] @ get CLKCON (and ensure in TLB)
orr r7, r7, #S3C2410_REFRESH_SELF @ SDRAM sleep command
orr r8, r8, #S3C2410_MISCCR_SDSLEEP @ SDRAM power-down signals
orr r9, r9, #S3C2410_CLKCON_POWER @ power down command
teq pc, #0 @ first as a trial-run to load cache
bl s3c2410_do_sleep
teq r0, r0 @ now do it for real
b s3c2410_do_sleep @
@@ align next bit of code to cache line
.align 5
s3c2410_do_sleep:
streq r7, [r4] @ SDRAM sleep command
streq r8, [r5] @ SDRAM power-down config
streq r9, [r6] @ CPU sleep
1: beq 1b
ret lr