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authorJoseph Lo <josephl@nvidia.com>2013-01-21 17:49:06 +0800
committerStephen Warren <swarren@nvidia.com>2013-01-29 11:01:23 -0700
commit51dc5259e8e1a05b9224e0c3ad61ebc3dc17d885 (patch)
tree02654cf268a2fa641dcecc4a3de9a9e4356b18d2 /arch/arm/mach-tegra
parent2da139657b108ab4485640178dd4d7f3ca931065 (diff)
ARM: tegra: add Tegra114 ARM_CPUIDLE_WFI_STATE support
Adding the generic ARM_CPUIDLE_WFI_STATE support for Tegra114. Signed-off-by: Joseph Lo <josephl@nvidia.com> Signed-off-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra')
-rw-r--r--arch/arm/mach-tegra/Makefile3
-rw-r--r--arch/arm/mach-tegra/cpuidle-tegra114.c61
-rw-r--r--arch/arm/mach-tegra/cpuidle.c3
-rw-r--r--arch/arm/mach-tegra/cpuidle.h6
4 files changed, 73 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index 8165b0a477d..f6b46ae2b7f 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -30,6 +30,9 @@ obj-$(CONFIG_TEGRA_PCI) += pcie.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += board-dt-tegra20.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += board-dt-tegra30.o
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += board-dt-tegra114.o
+ifeq ($(CONFIG_CPU_IDLE),y)
+obj-$(CONFIG_ARCH_TEGRA_114_SOC) += cpuidle-tegra114.o
+endif
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += board-harmony-pcie.o
diff --git a/arch/arm/mach-tegra/cpuidle-tegra114.c b/arch/arm/mach-tegra/cpuidle-tegra114.c
new file mode 100644
index 00000000000..0f4e8c483b3
--- /dev/null
+++ b/arch/arm/mach-tegra/cpuidle-tegra114.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2013, NVIDIA Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/cpuidle.h>
+
+#include <asm/cpuidle.h>
+
+static struct cpuidle_driver tegra_idle_driver = {
+ .name = "tegra_idle",
+ .owner = THIS_MODULE,
+ .en_core_tk_irqen = 1,
+ .state_count = 1,
+ .states = {
+ [0] = ARM_CPUIDLE_WFI_STATE_PWR(600),
+ },
+};
+
+static DEFINE_PER_CPU(struct cpuidle_device, tegra_idle_device);
+
+int __init tegra114_cpuidle_init(void)
+{
+ int ret;
+ unsigned int cpu;
+ struct cpuidle_device *dev;
+ struct cpuidle_driver *drv = &tegra_idle_driver;
+
+ ret = cpuidle_register_driver(&tegra_idle_driver);
+ if (ret) {
+ pr_err("CPUidle driver registration failed\n");
+ return ret;
+ }
+
+ for_each_possible_cpu(cpu) {
+ dev = &per_cpu(tegra_idle_device, cpu);
+ dev->cpu = cpu;
+
+ dev->state_count = drv->state_count;
+ ret = cpuidle_register_device(dev);
+ if (ret) {
+ pr_err("CPU%u: CPUidle device registration failed\n",
+ cpu);
+ return ret;
+ }
+ }
+ return 0;
+}
diff --git a/arch/arm/mach-tegra/cpuidle.c b/arch/arm/mach-tegra/cpuidle.c
index d0651397aec..4b744c4661e 100644
--- a/arch/arm/mach-tegra/cpuidle.c
+++ b/arch/arm/mach-tegra/cpuidle.c
@@ -38,6 +38,9 @@ static int __init tegra_cpuidle_init(void)
case TEGRA30:
ret = tegra30_cpuidle_init();
break;
+ case TEGRA114:
+ ret = tegra114_cpuidle_init();
+ break;
default:
ret = -ENODEV;
break;
diff --git a/arch/arm/mach-tegra/cpuidle.h b/arch/arm/mach-tegra/cpuidle.h
index 496204d34e5..d733f75d020 100644
--- a/arch/arm/mach-tegra/cpuidle.h
+++ b/arch/arm/mach-tegra/cpuidle.h
@@ -29,4 +29,10 @@ int tegra30_cpuidle_init(void);
static inline int tegra30_cpuidle_init(void) { return -ENODEV; }
#endif
+#ifdef CONFIG_ARCH_TEGRA_114_SOC
+int tegra114_cpuidle_init(void);
+#else
+static inline int tegra114_cpuidle_init(void) { return -ENODEV; }
+#endif
+
#endif