@@ -16,6 +16,7 @@ obj-$(CONFIG_MXC_ULPI) += ulpi.o
obj-$(CONFIG_MXC_USE_EPIT) += epit.o
obj-$(CONFIG_MXC_DEBUG_BOARD) += 3ds_debugboard.o
obj-$(CONFIG_CPU_FREQ_IMX) += cpufreq.o
+obj-$(CONFIG_CPU_IDLE) += cpuidle.o
ifdef CONFIG_SND_IMX_SOC
obj-y += ssi-fiq.o
obj-y += ssi-fiq-ksym.o
new file mode 100644
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ * Copyright 2012 Linaro Ltd.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/cpuidle.h>
+#include <linux/err.h>
+#include <linux/hrtimer.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+
+static struct cpuidle_device __percpu * imx_cpuidle_devices;
+
+static void __init imx_cpuidle_devices_uninit(void)
+{
+ int cpu_id;
+ struct cpuidle_device *dev;
+
+ for_each_possible_cpu(cpu_id) {
+ dev = per_cpu_ptr(imx_cpuidle_devices, cpu_id);
+ cpuidle_unregister_device(dev);
+ }
+
+ free_percpu(imx_cpuidle_devices);
+}
+
+int __init imx_cpuidle_init(struct cpuidle_driver *drv)
+{
+ struct cpuidle_device *dev;
+ int cpu_id, ret;
+
+ if (drv->state_count > CPUIDLE_STATE_MAX) {
+ pr_err("%s: state_count exceeds maximum\n", __func__);
+ return -EINVAL;
+ }
+
+ ret = cpuidle_register_driver(drv);
+ if (ret) {
+ pr_err("%s: Failed to register cpuidle driver with error: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ imx_cpuidle_devices = alloc_percpu(struct cpuidle_device);
+ if (imx_cpuidle_devices == NULL) {
+ ret = -ENOMEM;
+ goto unregister_drv;
+ }
+
+ /* initialize state data for each cpuidle_device */
+ for_each_possible_cpu(cpu_id) {
+ dev = per_cpu_ptr(imx_cpuidle_devices, cpu_id);
+ dev->cpu = cpu_id;
+ dev->state_count = drv->state_count;
+
+ ret = cpuidle_register_device(dev);
+ if (ret) {
+ pr_err("%s: Failed to register cpu %u, error: %d\n",
+ __func__, cpu_id, ret);
+ goto uninit;
+ }
+ }
+
+ return 0;
+
+uninit:
+ imx_cpuidle_devices_uninit();
+
+unregister_drv:
+ cpuidle_unregister_driver(drv);
+ return ret;
+}
new file mode 100644
@@ -0,0 +1,22 @@
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ * Copyright 2012 Linaro Ltd.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/cpuidle.h>
+
+#ifdef CONFIG_CPU_IDLE
+extern int imx_cpuidle_init(struct cpuidle_driver *drv);
+#else
+static inline int imx_cpuidle_init(struct cpuidle_driver *drv)
+{
+ return -ENODEV;
+}
+#endif
Add common cpuidle init functionality that can be used by various imx platforms. Signed-off-by: Robert Lee <rob.lee@linaro.org> --- arch/arm/plat-mxc/Makefile | 1 + arch/arm/plat-mxc/cpuidle.c | 80 ++++++++++++++++++++++++++++++ arch/arm/plat-mxc/include/mach/cpuidle.h | 22 ++++++++ 3 files changed, 103 insertions(+) create mode 100644 arch/arm/plat-mxc/cpuidle.c create mode 100644 arch/arm/plat-mxc/include/mach/cpuidle.h