From: hechtb@gmail.com (Bastian Hecht)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 2/2] ARM: shmobile: r8a7740: Add CPUIdle
Date: Wed, 17 Apr 2013 12:56:30 +0200 [thread overview]
Message-ID: <1366196190-14011-2-git-send-email-hechtb+renesas@gmail.com> (raw)
In-Reply-To: <1366196190-14011-1-git-send-email-hechtb+renesas@gmail.com>
We make use of the r8a7740 Suspend To Ram code to plug together a
CPUIdle driver.
Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
v3: same
arch/arm/mach-shmobile/Makefile | 2 +-
arch/arm/mach-shmobile/cpuidle-r8a7740.c | 62 +++++++++++++++++++++++++
arch/arm/mach-shmobile/include/mach/r8a7740.h | 1 +
arch/arm/mach-shmobile/pm-r8a7740.c | 1 +
4 files changed, 65 insertions(+), 1 deletion(-)
create mode 100644 arch/arm/mach-shmobile/cpuidle-r8a7740.c
diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile
index 0568894..2852dcf 100644
--- a/arch/arm/mach-shmobile/Makefile
+++ b/arch/arm/mach-shmobile/Makefile
@@ -30,7 +30,7 @@ obj-$(CONFIG_SUSPEND) += suspend.o
obj-$(CONFIG_CPU_IDLE) += cpuidle.o
obj-$(CONFIG_ARCH_SHMOBILE) += pm-rmobile.o
obj-$(CONFIG_ARCH_SH7372) += pm-sh7372.o sleep-sh7372.o
-obj-$(CONFIG_ARCH_R8A7740) += pm-r8a7740.o sleep-r8a7740.o
+obj-$(CONFIG_ARCH_R8A7740) += pm-r8a7740.o sleep-r8a7740.o cpuidle-r8a7740.o
obj-$(CONFIG_ARCH_R8A7779) += pm-r8a7779.o
obj-$(CONFIG_ARCH_SH73A0) += pm-sh73a0.o
diff --git a/arch/arm/mach-shmobile/cpuidle-r8a7740.c b/arch/arm/mach-shmobile/cpuidle-r8a7740.c
new file mode 100644
index 0000000..48c7a6c
--- /dev/null
+++ b/arch/arm/mach-shmobile/cpuidle-r8a7740.c
@@ -0,0 +1,62 @@
+/*
+ * CPUIdle code for SoC r8a7740
+ *
+ * Copyright (C) 2013 Bastian Hecht
+ *
+ * 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/cpuidle.h>
+#include <linux/module.h>
+#include <asm/cpuidle.h>
+#include <mach/common.h>
+#include <mach/r8a7740.h>
+
+#if defined(CONFIG_SUSPEND) && defined(CONFIG_CPU_IDLE)
+static int r8a7740_enter_a3sm_pll_on(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv, int index)
+{
+ r8a7740_enter_a3sm_common(1);
+ return 1;
+}
+
+static int r8a7740_enter_a3sm_pll_off(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv, int index)
+{
+ r8a7740_enter_a3sm_common(0);
+ return 2;
+}
+
+static struct cpuidle_driver r8a7740_cpuidle_driver = {
+ .name = "r8a7740_cpuidle",
+ .owner = THIS_MODULE,
+ .en_core_tk_irqen = 1,
+ .state_count = 3,
+ .safe_state_index = 0, /* C1 */
+ .states[0] = ARM_CPUIDLE_WFI_STATE,
+ .states[1] = {
+ .name = "C2",
+ .desc = "A3SM PLL ON",
+ .exit_latency = 40,
+ .target_residency = 30 + 40,
+ .flags = CPUIDLE_FLAG_TIME_VALID,
+ .enter = r8a7740_enter_a3sm_pll_on,
+ },
+ .states[2] = {
+ .name = "C3",
+ .desc = "A3SM PLL OFF",
+ .exit_latency = 120,
+ .target_residency = 30 + 120,
+ .flags = CPUIDLE_FLAG_TIME_VALID,
+ .enter = r8a7740_enter_a3sm_pll_off,
+ },
+};
+
+void r8a7740_cpuidle_init(void)
+{
+ shmobile_cpuidle_set_driver(&r8a7740_cpuidle_driver);
+}
+#else
+void r8a7740_cpuidle_init(void) {}
+#endif
diff --git a/arch/arm/mach-shmobile/include/mach/r8a7740.h b/arch/arm/mach-shmobile/include/mach/r8a7740.h
index 05551ee..5c3361a 100644
--- a/arch/arm/mach-shmobile/include/mach/r8a7740.h
+++ b/arch/arm/mach-shmobile/include/mach/r8a7740.h
@@ -542,6 +542,7 @@ extern void r8a7740_pinmux_init(void);
extern void r8a7740_pm_init(void);
extern void r8a7740_resume(void);
extern void r8a7740_shutdown(void);
+extern void r8a7740_cpuidle_init(void);
extern void r8a7740_enter_a3sm_common(int);
#ifdef CONFIG_PM
diff --git a/arch/arm/mach-shmobile/pm-r8a7740.c b/arch/arm/mach-shmobile/pm-r8a7740.c
index b9ca44b..2319aa5 100644
--- a/arch/arm/mach-shmobile/pm-r8a7740.c
+++ b/arch/arm/mach-shmobile/pm-r8a7740.c
@@ -237,4 +237,5 @@ static void r8a7740_suspend_init(void) {}
void __init r8a7740_pm_init(void)
{
r8a7740_suspend_init();
+ r8a7740_cpuidle_init();
}
--
1.7.9.5
next prev parent reply other threads:[~2013-04-17 10:56 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-17 10:56 [PATCH v3 1/2] ARM: shmobile: r8a7740: Add Suspend-To-RAM A3SM Bastian Hecht
2013-04-17 10:56 ` Bastian Hecht [this message]
2013-04-24 7:49 ` Simon Horman
2013-04-24 9:36 ` Bastian Hecht
2013-04-24 10:07 ` Simon Horman
2013-04-25 0:19 ` Simon Horman
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