summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-s3c24xx/pm-s3c2416.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2012-03-28 01:03:32 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-28 01:03:32 +0200
commitd61b7a572b292e2be409e13b4b3adf475f18fb29 (patch)
treee9d30390860147136c05e66abf1edda1bc5b0562 /arch/arm/mach-s3c24xx/pm-s3c2416.c
parentMerge tag 'maintainers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/... (diff)
parentMerge branch 'ep93xx-for-arm-soc' of git://github.com/RyanMallon/linux-2.6 in... (diff)
downloadlinux-d61b7a572b292e2be409e13b4b3adf475f18fb29.tar.xz
linux-d61b7a572b292e2be409e13b4b3adf475f18fb29.zip
Merge tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull "ARM: global cleanups" from Arnd Bergmann: "Quite a bit of code gets removed, and some stuff moved around, mostly the old samsung s3c24xx stuff. There should be no functional changes in this series otherwise. Some cleanups have dependencies on other arm-soc branches and will be sent in the second round. Signed-off-by: Arnd Bergmann <arnd@arndb.de>" Fixed up trivial conflicts mainly due to #include's being changes on both sides. * tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (121 commits) ep93xx: Remove unnecessary includes of ep93xx-regs.h ep93xx: Move EP93XX_SYSCON defines to SoC private header ep93xx: Move crunch code to mach-ep93xx directory ep93xx: Make syscon access functions private to SoC ep93xx: Configure GPIO ports in core code ep93xx: Move peripheral defines to local SoC header ep93xx: Convert the watchdog driver into a platform device. ep93xx: Use ioremap for backlight driver ep93xx: Move GPIO defines to gpio-ep93xx.h ep93xx: Don't use system controller defines in audio drivers ep93xx: Move PHYS_BASE defines to local SoC header file ARM: EXYNOS: Add clock register addresses for EXYNOS4X12 bus devfreq driver ARM: EXYNOS: add clock registers for exynos4x12-cpufreq PM / devfreq: update the name of EXYNOS clock registers that were omitted PM / devfreq: update the name of EXYNOS clock register ARM: EXYNOS: change the prefix S5P_ to EXYNOS4_ for clock ARM: EXYNOS: use static declaration on regarding clock ARM: EXYNOS: replace clock.c for other new EXYNOS SoCs ARM: OMAP2+: Fix build error after merge ARM: S3C24XX: remove call to s3c24xx_setup_clocks ...
Diffstat (limited to 'arch/arm/mach-s3c24xx/pm-s3c2416.c')
-rw-r--r--arch/arm/mach-s3c24xx/pm-s3c2416.c83
1 files changed, 83 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c24xx/pm-s3c2416.c b/arch/arm/mach-s3c24xx/pm-s3c2416.c
new file mode 100644
index 000000000000..1bd4817b8eb8
--- /dev/null
+++ b/arch/arm/mach-s3c24xx/pm-s3c2416.c
@@ -0,0 +1,83 @@
+/* linux/arch/arm/mach-s3c2416/pm.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * S3C2416 - PM support (Based on Ben Dooks' S3C2412 PM support)
+ *
+ * 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/device.h>
+#include <linux/syscore_ops.h>
+#include <linux/io.h>
+
+#include <asm/cacheflush.h>
+
+#include <mach/regs-power.h>
+#include <mach/regs-s3c2443-clock.h>
+
+#include <plat/cpu.h>
+#include <plat/pm.h>
+
+extern void s3c2412_sleep_enter(void);
+
+static int s3c2416_cpu_suspend(unsigned long arg)
+{
+ /* enable wakeup sources regardless of battery state */
+ __raw_writel(S3C2443_PWRCFG_SLEEP, S3C2443_PWRCFG);
+
+ /* set the mode as sleep, 2BED represents "Go to BED" */
+ __raw_writel(0x2BED, S3C2443_PWRMODE);
+
+ s3c2412_sleep_enter();
+
+ panic("sleep resumed to originator?");
+}
+
+static void s3c2416_pm_prepare(void)
+{
+ /*
+ * write the magic value u-boot uses to check for resume into
+ * the INFORM0 register, and ensure INFORM1 is set to the
+ * correct address to resume from.
+ */
+ __raw_writel(0x2BED, S3C2412_INFORM0);
+ __raw_writel(virt_to_phys(s3c_cpu_resume), S3C2412_INFORM1);
+}
+
+static int s3c2416_pm_add(struct device *dev, struct subsys_interface *sif)
+{
+ pm_cpu_prep = s3c2416_pm_prepare;
+ pm_cpu_sleep = s3c2416_cpu_suspend;
+
+ return 0;
+}
+
+static struct subsys_interface s3c2416_pm_interface = {
+ .name = "s3c2416_pm",
+ .subsys = &s3c2416_subsys,
+ .add_dev = s3c2416_pm_add,
+};
+
+static __init int s3c2416_pm_init(void)
+{
+ return subsys_interface_register(&s3c2416_pm_interface);
+}
+
+arch_initcall(s3c2416_pm_init);
+
+
+static void s3c2416_pm_resume(void)
+{
+ /* unset the return-from-sleep amd inform flags */
+ __raw_writel(0x0, S3C2443_PWRMODE);
+ __raw_writel(0x0, S3C2412_INFORM0);
+ __raw_writel(0x0, S3C2412_INFORM1);
+}
+
+struct syscore_ops s3c2416_pm_syscore_ops = {
+ .resume = s3c2416_pm_resume,
+};