ARM: EXYNOS4: Suspend to RAM Support

This patch adds support suspend to ram for EXYNOS4210.
As a note, this includes function of outer cache flush
because it is used before entering PM.

Signed-off-by: Jaecheol Lee <jc.lee@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/arch/arm/mach-exynos4/include/mach/pm-core.h b/arch/arm/mach-exynos4/include/mach/pm-core.h
new file mode 100644
index 000000000000..f26e46bc06ca
--- /dev/null
+++ b/arch/arm/mach-exynos4/include/mach/pm-core.h
@@ -0,0 +1,49 @@
+/* linux/arch/arm/mach-exynos4/include/mach/pm-core.h
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com
+ *
+ * Based on arch/arm/mach-s3c2410/include/mach/pm-core.h,
+ * Copyright 2008 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *      http://armlinux.simtec.co.uk/
+ *
+ * EXYNOS4210 - PM core support for arch/arm/plat-s5p/pm.c
+ *
+ * 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 <mach/regs-pmu.h>
+
+static inline void s3c_pm_debug_init_uart(void)
+{
+        /* nothing here yet */
+}
+
+static inline void s3c_pm_arch_prepare_irqs(void)
+{
+        unsigned int tmp;
+        tmp = __raw_readl(S5P_WAKEUP_MASK);
+        tmp &= ~(1 << 31);
+        __raw_writel(tmp, S5P_WAKEUP_MASK);
+
+        __raw_writel(s3c_irqwake_intmask, S5P_WAKEUP_MASK);
+        __raw_writel(s3c_irqwake_eintmask, S5P_EINT_WAKEUP_MASK);
+}
+
+static inline void s3c_pm_arch_stop_clocks(void)
+{
+        /* nothing here yet */
+}
+
+static inline void s3c_pm_arch_show_resume_irqs(void)
+{
+        /* nothing here yet */
+}
+
+static inline void s3c_pm_arch_update_uart(void __iomem *regs,
+                                           struct pm_uart_save *save)
+{
+        /* nothing here yet */
+}