diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2019-09-02 17:47:55 +0200 |
|---|---|---|
| committer | Krzysztof Kozlowski <krzk@kernel.org> | 2020-08-20 21:00:15 +0200 |
| commit | 71b9114d2c13a648fbe6523dd859e611c316ad90 (patch) | |
| tree | c380a723099f776736779319be913f8c0900989e /arch/arm/mach-s3c/sleep-s3c24xx.S | |
| parent | a3814e55b411e8cdb352637c65925f60b9ac15cc (diff) | |
ARM: s3c: move into a common directory
s3c24xx and s3c64xx have a lot in common, but are split across three
separate directories, which makes the interaction of the header files
more complicated than necessary.
Move all three directories into a new mach-s3c, with a minimal
set of changes to each file.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
[krzk: Rebase, add s3c24xx and s3c64xx suffix to several files, add SPDX
headers to new files, remove plat-samsung from MAINTAINERS]
Co-developed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
https://lore.kernel.org/r/20200806182059.2431-39-krzk@kernel.org
Diffstat (limited to 'arch/arm/mach-s3c/sleep-s3c24xx.S')
| -rw-r--r-- | arch/arm/mach-s3c/sleep-s3c24xx.S | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c/sleep-s3c24xx.S b/arch/arm/mach-s3c/sleep-s3c24xx.S new file mode 100644 index 000000000000..4bda4a413584 --- /dev/null +++ b/arch/arm/mach-s3c/sleep-s3c24xx.S @@ -0,0 +1,69 @@ +/* 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 <mach/map.h> + +#include <mach/regs-gpio.h> +#include <mach/regs-clock.h> + +/* + * S3C24XX_DEBUG_RESUME is dangerous if your bootloader does not + * reset the UART configuration, only enable if you really need this! + */ +//#define S3C24XX_DEBUG_RESUME + + .text + + /* sleep magic, to allow the bootloader to check for an valid + * image to resume to. Must be the first word before the + * s3c_cpu_resume entry. + */ + + .word 0x2bedf00d + + /* s3c_cpu_resume + * + * resume code entry for bootloader to call + */ + +ENTRY(s3c_cpu_resume) + mov r0, #PSR_I_BIT | PSR_F_BIT | SVC_MODE + msr cpsr_c, r0 + + @@ load UART to allow us to print the two characters for + @@ resume debug + + mov r2, #S3C24XX_PA_UART & 0xff000000 + orr r2, r2, #S3C24XX_PA_UART & 0xff000 + +#if 0 + /* SMDK2440 LED set */ + mov r14, #S3C24XX_PA_GPIO + ldr r12, [ r14, #0x54 ] + bic r12, r12, #3<<4 + orr r12, r12, #1<<7 + str r12, [ r14, #0x54 ] +#endif + +#ifdef S3C24XX_DEBUG_RESUME + mov r3, #'L' + strb r3, [ r2, #S3C2410_UTXH ] +1001: + ldrb r14, [ r3, #S3C2410_UTRSTAT ] + tst r14, #S3C2410_UTRSTAT_TXE + beq 1001b +#endif /* S3C24XX_DEBUG_RESUME */ + + b cpu_resume |