ARCH: CSR: basic PM suspend/resume support

index ed7ec48..3b15961 100644
@@ -40,6 +40,17 @@
 
 #define SIRFSOC_TIMER_LATCH_BIT	 BIT(0)
 
+#define SIRFSOC_TIMER_REG_CNT 11
+
+static const u32 sirfsoc_timer_reg_list[SIRFSOC_TIMER_REG_CNT] = {
+	SIRFSOC_TIMER_MATCH_0, SIRFSOC_TIMER_MATCH_1, SIRFSOC_TIMER_MATCH_2,
+	SIRFSOC_TIMER_MATCH_3, SIRFSOC_TIMER_MATCH_4, SIRFSOC_TIMER_MATCH_5,
+	SIRFSOC_TIMER_INT_EN, SIRFSOC_TIMER_WATCHDOG_EN, SIRFSOC_TIMER_DIV,
+	SIRFSOC_TIMER_LATCHED_LO, SIRFSOC_TIMER_LATCHED_HI,
+};
+
+static u32 sirfsoc_timer_reg_val[SIRFSOC_TIMER_REG_CNT];
+
 static void __iomem *sirfsoc_timer_base;
 static void __init sirfsoc_of_timer_map(void);
 

@@ -106,6 +117,27 @@ static void sirfsoc_timer_set_mode(enum clock_event_mode mode,
 	}
 }
 
+static void sirfsoc_clocksource_suspend(struct clocksource *cs)
+{
+	int i;
+
+	writel_relaxed(SIRFSOC_TIMER_LATCH_BIT, sirfsoc_timer_base + SIRFSOC_TIMER_LATCH);
+
+	for (i = 0; i < SIRFSOC_TIMER_REG_CNT; i++)
+		sirfsoc_timer_reg_val[i] = readl_relaxed(sirfsoc_timer_base + sirfsoc_timer_reg_list[i]);
+}
+
+static void sirfsoc_clocksource_resume(struct clocksource *cs)
+{
+	int i;
+
+	for (i = 0; i < SIRFSOC_TIMER_REG_CNT; i++)
+		writel_relaxed(sirfsoc_timer_reg_val[i], sirfsoc_timer_base + sirfsoc_timer_reg_list[i]);
+
+	writel_relaxed(sirfsoc_timer_reg_val[i - 2], sirfsoc_timer_base + SIRFSOC_TIMER_COUNTER_LO);
+	writel_relaxed(sirfsoc_timer_reg_val[i - 1], sirfsoc_timer_base + SIRFSOC_TIMER_COUNTER_HI);
+}
+
 static struct clock_event_device sirfsoc_clockevent = {
 	.name = "sirfsoc_clockevent",
 	.rating = 200,

@@ -120,6 +152,8 @@ static struct clocksource sirfsoc_clocksource = {
 	.mask = CLOCKSOURCE_MASK(64),
 	.flags = CLOCK_SOURCE_IS_CONTINUOUS,
 	.read = sirfsoc_timer_read,
+	.suspend = sirfsoc_clocksource_suspend,
+	.resume = sirfsoc_clocksource_resume,
 };
 
 static struct irqaction sirfsoc_timer_irq = {

index cf80a72..d93ceef 100644
@@ -14,6 +14,7 @@
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/irqdomain.h>
+#include <linux/syscore_ops.h>
 
 #define SIRFSOC_INT_RISC_MASK0          0x0018
 #define SIRFSOC_INT_RISC_MASK1          0x001C

@@ -73,3 +74,42 @@ void __init sirfsoc_of_irq_init(void)
 
 	sirfsoc_irq_init();
 }
+
+struct sirfsoc_irq_status {
+	u32 mask0;
+	u32 mask1;
+	u32 level0;
+	u32 level1;
+};
+
+static struct sirfsoc_irq_status sirfsoc_irq_st;
+
+static int sirfsoc_irq_suspend(void)
+{
+	sirfsoc_irq_st.mask0 = readl_relaxed(sirfsoc_intc_base + SIRFSOC_INT_RISC_MASK0);
+	sirfsoc_irq_st.mask1 = readl_relaxed(sirfsoc_intc_base + SIRFSOC_INT_RISC_MASK1);
+	sirfsoc_irq_st.level0 = readl_relaxed(sirfsoc_intc_base + SIRFSOC_INT_RISC_LEVEL0);
+	sirfsoc_irq_st.level1 = readl_relaxed(sirfsoc_intc_base + SIRFSOC_INT_RISC_LEVEL1);
+
+	return 0;
+}
+
+static void sirfsoc_irq_resume(void)
+{
+	writel_relaxed(sirfsoc_irq_st.mask0, sirfsoc_intc_base + SIRFSOC_INT_RISC_MASK0);
+	writel_relaxed(sirfsoc_irq_st.mask1, sirfsoc_intc_base + SIRFSOC_INT_RISC_MASK1);
+	writel_relaxed(sirfsoc_irq_st.level0, sirfsoc_intc_base + SIRFSOC_INT_RISC_LEVEL0);
+	writel_relaxed(sirfsoc_irq_st.level1, sirfsoc_intc_base + SIRFSOC_INT_RISC_LEVEL1);
+}
+
+static struct syscore_ops sirfsoc_irq_syscore_ops = {
+	.suspend	= sirfsoc_irq_suspend,
+	.resume		= sirfsoc_irq_resume,
+};
+
+static int __init sirfsoc_irq_pm_init(void)
+{
+	register_syscore_ops(&sirfsoc_irq_syscore_ops);
+	return 0;
+}
+device_initcall(sirfsoc_irq_pm_init);

150 lines not on this page · raw message

new file mode 100644
index 0000000..aa2b428
@@ -0,0 +1,31 @@
+/*
+ * arch/arm/mach-prima2/pm.h
+ *
+ * Copyright (C) 2011 CSR
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef _MACH_PRIMA2_PM_H_
+#define _MACH_PRIMA2_PM_H_
+
+#define SIRFSOC_PWR_SLEEPFORCE		0x01
+
+#define SIRFSOC_SLEEP_MODE_MASK         0x3
+#define SIRFSOC_DEEP_SLEEP_MODE         0x1
+
+#define SIRFSOC_PWRC_PDN_CTRL           0x0
+#define SIRFSOC_PWRC_PON_OFF            0x4
+#define SIRFSOC_PWRC_TRIGGER_EN         0x8
+#define SIRFSOC_PWRC_PIN_STATUS         0x14
+#define SIRFSOC_PWRC_SCRATCH_PAD1       0x18
+#define SIRFSOC_PWRC_SCRATCH_PAD2       0x1C
+
+#ifndef __ASSEMBLY__
+extern int sirfsoc_finish_suspend(unsigned long);
+#endif
+
+#endif
+