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-rw-r--r--kernel/arch/arm/mach-shmobile/pm-r8a7740.c129
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();
+}