ARM: S5PV210: Add Power Management Support

This patch adds suspend-to-ram support for S5PV210.
Note. This patch is confirmed on SMDKV210 and SMDKC110 board.

Signed-off-by: Jongpill Lee <boyko.lee@samsung.com>
Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

3 files changed, 147 insertions, 0 deletions

diff --git a/arch/arm/plat-s5p/Makefile b/arch/arm/plat-s5p/Makefile
index e0823be3c8b9..de65238a7aef 100644
--- a/arch/arm/plat-s5p/Makefile
+++ b/arch/arm/plat-s5p/Makefile
@@ -19,6 +19,8 @@ obj-y				+= clock.o
 obj-y                           += irq.o
 obj-$(CONFIG_S5P_EXT_INT)       += irq-eint.o
 obj-$(CONFIG_S5P_GPIO_INT)      += irq-gpioint.o
+obj-$(CONFIG_PM)                += pm.o
+obj-$(CONFIG_PM)                += irq-pm.o
 
 # devices
 
diff --git a/arch/arm/plat-s5p/irq-pm.c b/arch/arm/plat-s5p/irq-pm.c
new file mode 100644
index 000000000000..dc33b9ecda45
--- /dev/null
+++ b/arch/arm/plat-s5p/irq-pm.c
@@ -0,0 +1,93 @@
+/* linux/arch/arm/plat-s5p/irq-pm.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com
+ *
+ * Based on arch/arm/plat-s3c24xx/irq-pm.c,
+ * Copyright (c) 2003,2004 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *      http://armlinux.simtec.co.uk/
+ *
+ * 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/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/sysdev.h>
+
+#include <plat/cpu.h>
+#include <plat/irqs.h>
+#include <plat/pm.h>
+#include <mach/map.h>
+
+#include <mach/regs-gpio.h>
+#include <mach/regs-irq.h>
+
+/* state for IRQs over sleep */
+
+/* default is to allow for EINT0..EINT31, and IRQ_RTC_TIC, IRQ_RTC_ALARM,
+ * as wakeup sources
+ *
+ * set bit to 1 in allow bitfield to enable the wakeup settings on it
+*/
+
+unsigned long s3c_irqwake_intallow      = 0x00000006L;
+unsigned long s3c_irqwake_eintallow     = 0xffffffffL;
+
+int s3c_irq_wake(unsigned int irqno, unsigned int state)
+{
+        unsigned long irqbit;
+
+        switch (irqno) {
+        case IRQ_RTC_TIC:
+        case IRQ_RTC_ALARM:
+                irqbit = 1 << (irqno + 1 - IRQ_RTC_ALARM);
+                if (!state)
+                        s3c_irqwake_intmask |= irqbit;
+                else
+                        s3c_irqwake_intmask &= ~irqbit;
+                break;
+        default:
+                return -ENOENT;
+        }
+        return 0;
+}
+
+static struct sleep_save eint_save[] = {
+        SAVE_ITEM(S5P_EINT_CON(0)),
+        SAVE_ITEM(S5P_EINT_CON(1)),
+        SAVE_ITEM(S5P_EINT_CON(2)),
+        SAVE_ITEM(S5P_EINT_CON(3)),
+
+        SAVE_ITEM(S5P_EINT_FLTCON(0)),
+        SAVE_ITEM(S5P_EINT_FLTCON(1)),
+        SAVE_ITEM(S5P_EINT_FLTCON(2)),
+        SAVE_ITEM(S5P_EINT_FLTCON(3)),
+        SAVE_ITEM(S5P_EINT_FLTCON(4)),
+        SAVE_ITEM(S5P_EINT_FLTCON(5)),
+        SAVE_ITEM(S5P_EINT_FLTCON(6)),
+        SAVE_ITEM(S5P_EINT_FLTCON(7)),
+
+        SAVE_ITEM(S5P_EINT_MASK(0)),
+        SAVE_ITEM(S5P_EINT_MASK(1)),
+        SAVE_ITEM(S5P_EINT_MASK(2)),
+        SAVE_ITEM(S5P_EINT_MASK(3)),
+};
+
+int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state)
+{
+        s3c_pm_do_save(eint_save, ARRAY_SIZE(eint_save));
+
+        return 0;
+}
+
+int s3c24xx_irq_resume(struct sys_device *dev)
+{
+        s3c_pm_do_restore(eint_save, ARRAY_SIZE(eint_save));
+
+        return 0;
+}
+
diff --git a/arch/arm/plat-s5p/pm.c b/arch/arm/plat-s5p/pm.c
new file mode 100644
index 000000000000..d592b6304b48
--- /dev/null
+++ b/arch/arm/plat-s5p/pm.c
@@ -0,0 +1,52 @@
+/* linux/arch/arm/plat-s5p/pm.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com
+ *
+ * S5P Power Manager (Suspend-To-RAM) support
+ *
+ * Based on arch/arm/plat-s3c24xx/pm.c
+ * Copyright (c) 2004,2006 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ * 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/suspend.h>
+#include <plat/pm.h>
+
+#define PFX "s5p pm: "
+
+/* s3c_pm_check_resume_pin
+ *
+ * check to see if the pin is configured correctly for sleep mode, and
+ * make any necessary adjustments if it is not
+*/
+
+static void s3c_pm_check_resume_pin(unsigned int pin, unsigned int irqoffs)
+{
+        /* nothing here yet */
+}
+
+/* s3c_pm_configure_extint
+ *
+ * configure all external interrupt pins
+*/
+
+void s3c_pm_configure_extint(void)
+{
+        /* nothing here yet */
+}
+
+void s3c_pm_restore_core(void)
+{
+        /* nothing here yet */
+}
+
+void s3c_pm_save_core(void)
+{
+        /* nothing here yet */
+}
+