1 files changed, 129 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-shmobile/pm-r8a7740.c b/kernel/arch/arm/mach-shmobile/pm-r8a7740.c
new file mode 100644
index 000000000..34608fcf0
--- /dev/null
+++ b/kernel/arch/arm/mach-shmobile/pm-r8a7740.c
@@ -0,0 +1,129 @@
+/*
+ * r8a7740 power management support
+ *
+ * Copyright (C) 2012  Renesas Solutions Corp.
+ * Copyright (C) 2012  Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * 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/console.h>
+#include <linux/io.h>
+#include <linux/suspend.h>
+
+#include "common.h"
+#include "pm-rmobile.h"
+
+#define SYSC_BASE	IOMEM(0xe6180000)
+
+#if defined(CONFIG_PM) && !defined(CONFIG_ARCH_MULTIPLATFORM)
+static int r8a7740_pd_a3sm_suspend(void)
+{
+	/*
+	 * The A3SM domain contains the CPU core and therefore it should
+	 * only be turned off if the CPU is not in use.
+	 */
+	return -EBUSY;
+}
+
+static int r8a7740_pd_a3sp_suspend(void)
+{
+	/*
+	 * Serial consoles make use of SCIF hardware located in A3SP,
+	 * keep such power domain on if "no_console_suspend" is set.
+	 */
+	return console_suspend_enabled ? 0 : -EBUSY;
+}
+
+static int r8a7740_pd_d4_suspend(void)
+{
+	/*
+	 * The D4 domain contains the Coresight-ETM hardware block and
+	 * therefore it should only be turned off if the debug module is
+	 * not in use.
+	 */
+	return -EBUSY;
+}
+
+static struct rmobile_pm_domain r8a7740_pm_domains[] = {
+	{
+		.genpd.name	= "A4LC",
+		.base		= SYSC_BASE,
+		.bit_shift	= 1,
+	}, {
+		.genpd.name	= "A4MP",
+		.base		= SYSC_BASE,
+		.bit_shift	= 2,
+	}, {
+		.genpd.name	= "D4",
+		.base		= SYSC_BASE,
+		.bit_shift	= 3,
+		.gov		= &pm_domain_always_on_gov,
+		.suspend	= r8a7740_pd_d4_suspend,
+	}, {
+		.genpd.name	= "A4R",
+		.base		= SYSC_BASE,
+		.bit_shift	= 5,
+	}, {
+		.genpd.name	= "A3RV",
+		.base		= SYSC_BASE,
+		.bit_shift	= 6,
+	}, {
+		.genpd.name	= "A4S",
+		.base		= SYSC_BASE,
+		.bit_shift	= 10,
+		.no_debug	= true,
+	}, {
+		.genpd.name	= "A3SP",
+		.base		= SYSC_BASE,
+		.bit_shift	= 11,
+		.gov		= &pm_domain_always_on_gov,
+		.no_debug	= true,
+		.suspend	= r8a7740_pd_a3sp_suspend,
+	}, {
+		.genpd.name	= "A3SM",
+		.base		= SYSC_BASE,
+		.bit_shift	= 12,
+		.gov		= &pm_domain_always_on_gov,
+		.suspend	= r8a7740_pd_a3sm_suspend,
+	}, {
+		.genpd.name	= "A3SG",
+		.base		= SYSC_BASE,
+		.bit_shift	= 13,
+	}, {
+		.genpd.name	= "A4SU",
+		.base		= SYSC_BASE,
+		.bit_shift	= 20,
+	},
+};
+
+void __init r8a7740_init_pm_domains(void)
+{
+	rmobile_init_domains(r8a7740_pm_domains, ARRAY_SIZE(r8a7740_pm_domains));
+	pm_genpd_add_subdomain_names("A4R", "A3RV");
+	pm_genpd_add_subdomain_names("A4S", "A3SP");
+	pm_genpd_add_subdomain_names("A4S", "A3SM");
+	pm_genpd_add_subdomain_names("A4S", "A3SG");
+}
+#endif /* CONFIG_PM && !CONFIG_ARCH_MULTIPLATFORM */
+
+#ifdef CONFIG_SUSPEND
+static int r8a7740_enter_suspend(suspend_state_t suspend_state)
+{
+	cpu_do_idle();
+	return 0;
+}
+
+static void r8a7740_suspend_init(void)
+{
+	shmobile_suspend_ops.enter = r8a7740_enter_suspend;
+}
+#else
+static void r8a7740_suspend_init(void) {}
+#endif
+
+void __init r8a7740_pm_init(void)
+{
+	r8a7740_suspend_init();
+}