1 files changed, 143 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-shmobile/pm-r8a7779.c b/kernel/arch/arm/mach-shmobile/pm-r8a7779.c
new file mode 100644
index 000000000..44a74c4c5
--- /dev/null
+++ b/kernel/arch/arm/mach-shmobile/pm-r8a7779.c
@@ -0,0 +1,143 @@
+/*
+ * r8a7779 Power management support
+ *
+ * Copyright (C) 2011  Renesas Solutions Corp.
+ * Copyright (C) 2011  Magnus Damm
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/pm.h>
+#include <linux/suspend.h>
+#include <linux/err.h>
+#include <linux/pm_clock.h>
+#include <linux/pm_domain.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/console.h>
+
+#include <asm/io.h>
+
+#include "common.h"
+#include "pm-rcar.h"
+#include "r8a7779.h"
+
+/* SYSC */
+#define SYSCIER 0x0c
+#define SYSCIMR 0x10
+
+struct r8a7779_pm_domain {
+	struct generic_pm_domain genpd;
+	struct rcar_sysc_ch ch;
+};
+
+static inline struct rcar_sysc_ch *to_r8a7779_ch(struct generic_pm_domain *d)
+{
+	return &container_of(d, struct r8a7779_pm_domain, genpd)->ch;
+}
+
+#if defined(CONFIG_PM) || defined(CONFIG_SMP)
+
+static void __init r8a7779_sysc_init(void)
+{
+	void __iomem *base = rcar_sysc_init(0xffd85000);
+
+	/* enable all interrupt sources, but do not use interrupt handler */
+	iowrite32(0x0131000e, base + SYSCIER);
+	iowrite32(0, base + SYSCIMR);
+}
+
+#else /* CONFIG_PM || CONFIG_SMP */
+
+static inline void r8a7779_sysc_init(void) {}
+
+#endif /* CONFIG_PM || CONFIG_SMP */
+
+#ifdef CONFIG_PM
+
+static int pd_power_down(struct generic_pm_domain *genpd)
+{
+	return rcar_sysc_power_down(to_r8a7779_ch(genpd));
+}
+
+static int pd_power_up(struct generic_pm_domain *genpd)
+{
+	return rcar_sysc_power_up(to_r8a7779_ch(genpd));
+}
+
+static bool pd_is_off(struct generic_pm_domain *genpd)
+{
+	return rcar_sysc_power_is_off(to_r8a7779_ch(genpd));
+}
+
+static bool pd_active_wakeup(struct device *dev)
+{
+	return true;
+}
+
+static void r8a7779_init_pm_domain(struct r8a7779_pm_domain *r8a7779_pd)
+{
+	struct generic_pm_domain *genpd = &r8a7779_pd->genpd;
+
+	genpd->flags = GENPD_FLAG_PM_CLK;
+	pm_genpd_init(genpd, NULL, false);
+	genpd->dev_ops.active_wakeup = pd_active_wakeup;
+	genpd->power_off = pd_power_down;
+	genpd->power_on = pd_power_up;
+
+	if (pd_is_off(&r8a7779_pd->genpd))
+		pd_power_up(&r8a7779_pd->genpd);
+}
+
+static struct r8a7779_pm_domain r8a7779_pm_domains[] = {
+	{
+		.genpd.name = "SH4A",
+		.ch = {
+			.chan_offs = 0x80, /* PWRSR1 .. PWRER1 */
+			.isr_bit = 16, /* SH4A */
+		},
+	},
+	{
+		.genpd.name = "SGX",
+		.ch = {
+			.chan_offs = 0xc0, /* PWRSR2 .. PWRER2 */
+			.isr_bit = 20, /* SGX */
+		},
+	},
+	{
+		.genpd.name = "VDP1",
+		.ch = {
+			.chan_offs = 0x100, /* PWRSR3 .. PWRER3 */
+			.isr_bit = 21, /* VDP */
+		},
+	},
+	{
+		.genpd.name = "IMPX3",
+		.ch = {
+			.chan_offs = 0x140, /* PWRSR4 .. PWRER4 */
+			.isr_bit = 24, /* IMP */
+		},
+	},
+};
+
+void __init r8a7779_init_pm_domains(void)
+{
+	int j;
+
+	for (j = 0; j < ARRAY_SIZE(r8a7779_pm_domains); j++)
+		r8a7779_init_pm_domain(&r8a7779_pm_domains[j]);
+}
+
+#endif /* CONFIG_PM */
+
+void __init r8a7779_pm_init(void)
+{
+	static int once;
+
+	if (!once++)
+		r8a7779_sysc_init();
+}