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-rw-r--r--drivers/cpuidle/Kconfig.arm17
-rw-r--r--drivers/cpuidle/Makefile3
-rw-r--r--drivers/cpuidle/coupled.c2
-rw-r--r--drivers/cpuidle/cpuidle-armada-370-xp.c93
-rw-r--r--drivers/cpuidle/cpuidle-clps711x.c64
-rw-r--r--drivers/cpuidle/cpuidle-exynos.c99
6 files changed, 277 insertions, 1 deletions
diff --git a/drivers/cpuidle/Kconfig.arm b/drivers/cpuidle/Kconfig.arm
index 97ccc31dbdd..b6d69e899f5 100644
--- a/drivers/cpuidle/Kconfig.arm
+++ b/drivers/cpuidle/Kconfig.arm
@@ -1,6 +1,11 @@
#
# ARM CPU Idle drivers
#
+config ARM_ARMADA_370_XP_CPUIDLE
+ bool "CPU Idle Driver for Armada 370/XP family processors"
+ depends on ARCH_MVEBU
+ help
+ Select this to enable cpuidle on Armada 370/XP processors.
config ARM_BIG_LITTLE_CPUIDLE
bool "Support for ARM big.LITTLE processors"
@@ -13,6 +18,12 @@ config ARM_BIG_LITTLE_CPUIDLE
define different C-states for little and big cores through the
multiple CPU idle drivers infrastructure.
+config ARM_CLPS711X_CPUIDLE
+ bool "CPU Idle Driver for CLPS711X processors"
+ depends on ARCH_CLPS711X || COMPILE_TEST
+ help
+ Select this to enable cpuidle on Cirrus Logic CLPS711X SOCs.
+
config ARM_HIGHBANK_CPUIDLE
bool "CPU Idle Driver for Calxeda processors"
depends on ARM_PSCI
@@ -44,3 +55,9 @@ config ARM_AT91_CPUIDLE
depends on ARCH_AT91
help
Select this to enable cpuidle for AT91 processors
+
+config ARM_EXYNOS_CPUIDLE
+ bool "Cpu Idle Driver for the Exynos processors"
+ depends on ARCH_EXYNOS
+ help
+ Select this to enable cpuidle for Exynos processors
diff --git a/drivers/cpuidle/Makefile b/drivers/cpuidle/Makefile
index f71ae1b373c..9b5b2b560d7 100644
--- a/drivers/cpuidle/Makefile
+++ b/drivers/cpuidle/Makefile
@@ -7,12 +7,15 @@ obj-$(CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED) += coupled.o
##################################################################################
# ARM SoC drivers
+obj-$(CONFIG_ARM_ARMADA_370_XP_CPUIDLE) += cpuidle-armada-370-xp.o
obj-$(CONFIG_ARM_BIG_LITTLE_CPUIDLE) += cpuidle-big_little.o
+obj-$(CONFIG_ARM_CLPS711X_CPUIDLE) += cpuidle-clps711x.o
obj-$(CONFIG_ARM_HIGHBANK_CPUIDLE) += cpuidle-calxeda.o
obj-$(CONFIG_ARM_KIRKWOOD_CPUIDLE) += cpuidle-kirkwood.o
obj-$(CONFIG_ARM_ZYNQ_CPUIDLE) += cpuidle-zynq.o
obj-$(CONFIG_ARM_U8500_CPUIDLE) += cpuidle-ux500.o
obj-$(CONFIG_ARM_AT91_CPUIDLE) += cpuidle-at91.o
+obj-$(CONFIG_ARM_EXYNOS_CPUIDLE) += cpuidle-exynos.o
###############################################################################
# POWERPC drivers
diff --git a/drivers/cpuidle/coupled.c b/drivers/cpuidle/coupled.c
index cb6654bfad7..73fe2f8d7f9 100644
--- a/drivers/cpuidle/coupled.c
+++ b/drivers/cpuidle/coupled.c
@@ -159,7 +159,7 @@ void cpuidle_coupled_parallel_barrier(struct cpuidle_device *dev, atomic_t *a)
{
int n = dev->coupled->online_count;
- smp_mb__before_atomic_inc();
+ smp_mb__before_atomic();
atomic_inc(a);
while (atomic_read(a) < n)
diff --git a/drivers/cpuidle/cpuidle-armada-370-xp.c b/drivers/cpuidle/cpuidle-armada-370-xp.c
new file mode 100644
index 00000000000..28587d0f394
--- /dev/null
+++ b/drivers/cpuidle/cpuidle-armada-370-xp.c
@@ -0,0 +1,93 @@
+/*
+ * Marvell Armada 370 and Armada XP SoC cpuidle driver
+ *
+ * Copyright (C) 2014 Marvell
+ *
+ * Nadav Haklai <nadavh@marvell.com>
+ * Gregory CLEMENT <gregory.clement@free-electrons.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ *
+ * Maintainer: Gregory CLEMENT <gregory.clement@free-electrons.com>
+ */
+
+#include <linux/cpu_pm.h>
+#include <linux/cpuidle.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/suspend.h>
+#include <linux/platform_device.h>
+#include <asm/cpuidle.h>
+
+#define ARMADA_370_XP_MAX_STATES 3
+#define ARMADA_370_XP_FLAG_DEEP_IDLE 0x10000
+
+static int (*armada_370_xp_cpu_suspend)(int);
+
+static int armada_370_xp_enter_idle(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv,
+ int index)
+{
+ int ret;
+ bool deepidle = false;
+ cpu_pm_enter();
+
+ if (drv->states[index].flags & ARMADA_370_XP_FLAG_DEEP_IDLE)
+ deepidle = true;
+
+ ret = armada_370_xp_cpu_suspend(deepidle);
+ if (ret)
+ return ret;
+
+ cpu_pm_exit();
+
+ return index;
+}
+
+static struct cpuidle_driver armada_370_xp_idle_driver = {
+ .name = "armada_370_xp_idle",
+ .states[0] = ARM_CPUIDLE_WFI_STATE,
+ .states[1] = {
+ .enter = armada_370_xp_enter_idle,
+ .exit_latency = 10,
+ .power_usage = 50,
+ .target_residency = 100,
+ .flags = CPUIDLE_FLAG_TIME_VALID,
+ .name = "MV CPU IDLE",
+ .desc = "CPU power down",
+ },
+ .states[2] = {
+ .enter = armada_370_xp_enter_idle,
+ .exit_latency = 100,
+ .power_usage = 5,
+ .target_residency = 1000,
+ .flags = CPUIDLE_FLAG_TIME_VALID |
+ ARMADA_370_XP_FLAG_DEEP_IDLE,
+ .name = "MV CPU DEEP IDLE",
+ .desc = "CPU and L2 Fabric power down",
+ },
+ .state_count = ARMADA_370_XP_MAX_STATES,
+};
+
+static int armada_370_xp_cpuidle_probe(struct platform_device *pdev)
+{
+
+ armada_370_xp_cpu_suspend = (void *)(pdev->dev.platform_data);
+ return cpuidle_register(&armada_370_xp_idle_driver, NULL);
+}
+
+static struct platform_driver armada_370_xp_cpuidle_plat_driver = {
+ .driver = {
+ .name = "cpuidle-armada-370-xp",
+ .owner = THIS_MODULE,
+ },
+ .probe = armada_370_xp_cpuidle_probe,
+};
+
+module_platform_driver(armada_370_xp_cpuidle_plat_driver);
+
+MODULE_AUTHOR("Gregory CLEMENT <gregory.clement@free-electrons.com>");
+MODULE_DESCRIPTION("Armada 370/XP cpu idle driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/cpuidle/cpuidle-clps711x.c b/drivers/cpuidle/cpuidle-clps711x.c
new file mode 100644
index 00000000000..5243811daa6
--- /dev/null
+++ b/drivers/cpuidle/cpuidle-clps711x.c
@@ -0,0 +1,64 @@
+/*
+ * CLPS711X CPU idle driver
+ *
+ * Copyright (C) 2014 Alexander Shiyan <shc_work@mail.ru>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/cpuidle.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#define CLPS711X_CPUIDLE_NAME "clps711x-cpuidle"
+
+static void __iomem *clps711x_halt;
+
+static int clps711x_cpuidle_halt(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv, int index)
+{
+ writel(0xaa, clps711x_halt);
+
+ return index;
+}
+
+static struct cpuidle_driver clps711x_idle_driver = {
+ .name = CLPS711X_CPUIDLE_NAME,
+ .owner = THIS_MODULE,
+ .states[0] = {
+ .name = "HALT",
+ .desc = "CLPS711X HALT",
+ .enter = clps711x_cpuidle_halt,
+ .exit_latency = 1,
+ },
+ .state_count = 1,
+};
+
+static int __init clps711x_cpuidle_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ clps711x_halt = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(clps711x_halt))
+ return PTR_ERR(clps711x_halt);
+
+ return cpuidle_register(&clps711x_idle_driver, NULL);
+}
+
+static struct platform_driver clps711x_cpuidle_driver = {
+ .driver = {
+ .name = CLPS711X_CPUIDLE_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+module_platform_driver_probe(clps711x_cpuidle_driver, clps711x_cpuidle_probe);
+
+MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
+MODULE_DESCRIPTION("CLPS711X CPU idle driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/cpuidle/cpuidle-exynos.c b/drivers/cpuidle/cpuidle-exynos.c
new file mode 100644
index 00000000000..7c015126382
--- /dev/null
+++ b/drivers/cpuidle/cpuidle-exynos.c
@@ -0,0 +1,99 @@
+/* linux/arch/arm/mach-exynos/cpuidle.c
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/cpuidle.h>
+#include <linux/cpu_pm.h>
+#include <linux/export.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <asm/proc-fns.h>
+#include <asm/suspend.h>
+#include <asm/cpuidle.h>
+
+static void (*exynos_enter_aftr)(void);
+
+static int idle_finisher(unsigned long flags)
+{
+ exynos_enter_aftr();
+ cpu_do_idle();
+
+ return 1;
+}
+
+static int exynos_enter_core0_aftr(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv,
+ int index)
+{
+ cpu_pm_enter();
+ cpu_suspend(0, idle_finisher);
+ cpu_pm_exit();
+
+ return index;
+}
+
+static int exynos_enter_lowpower(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv,
+ int index)
+{
+ int new_index = index;
+
+ /* AFTR can only be entered when cores other than CPU0 are offline */
+ if (num_online_cpus() > 1 || dev->cpu != 0)
+ new_index = drv->safe_state_index;
+
+ if (new_index == 0)
+ return arm_cpuidle_simple_enter(dev, drv, new_index);
+ else
+ return exynos_enter_core0_aftr(dev, drv, new_index);
+}
+
+static struct cpuidle_driver exynos_idle_driver = {
+ .name = "exynos_idle",
+ .owner = THIS_MODULE,
+ .states = {
+ [0] = ARM_CPUIDLE_WFI_STATE,
+ [1] = {
+ .enter = exynos_enter_lowpower,
+ .exit_latency = 300,
+ .target_residency = 100000,
+ .flags = CPUIDLE_FLAG_TIME_VALID,
+ .name = "C1",
+ .desc = "ARM power down",
+ },
+ },
+ .state_count = 2,
+ .safe_state_index = 0,
+};
+
+static int exynos_cpuidle_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ exynos_enter_aftr = (void *)(pdev->dev.platform_data);
+
+ ret = cpuidle_register(&exynos_idle_driver, NULL);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register cpuidle driver\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct platform_driver exynos_cpuidle_driver = {
+ .probe = exynos_cpuidle_probe,
+ .driver = {
+ .name = "exynos_cpuidle",
+ .owner = THIS_MODULE,
+ },
+};
+
+module_platform_driver(exynos_cpuidle_driver);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-11 05:20:26 +0000