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-rw-r--r--drivers/cpuidle/Kconfig.arm7
-rw-r--r--drivers/cpuidle/Makefile1
-rw-r--r--drivers/cpuidle/cpuidle-qcom.c99
3 files changed, 107 insertions, 0 deletions
diff --git a/drivers/cpuidle/Kconfig.arm b/drivers/cpuidle/Kconfig.arm
index 8c16ab20fb15..e98993c872a2 100644
--- a/drivers/cpuidle/Kconfig.arm
+++ b/drivers/cpuidle/Kconfig.arm
@@ -63,3 +63,10 @@ config ARM_MVEBU_V7_CPUIDLE
depends on ARCH_MVEBU
help
Select this to enable cpuidle on Armada 370, 38x and XP processors.
+
+config ARM_QCOM_CPUIDLE
+ bool "CPU Idle drivers for Qualcomm processors"
+ depends on ARCH_QCOM
+ select DT_IDLE_STATES
+ help
+ Select this to enable cpuidle for QCOM processors
diff --git a/drivers/cpuidle/Makefile b/drivers/cpuidle/Makefile
index 4d177b916f75..6c222d536005 100644
--- a/drivers/cpuidle/Makefile
+++ b/drivers/cpuidle/Makefile
@@ -17,6 +17,7 @@ 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
+obj-$(CONFIG_ARM_QCOM_CPUIDLE) += cpuidle-qcom.o
###############################################################################
# MIPS drivers
diff --git a/drivers/cpuidle/cpuidle-qcom.c b/drivers/cpuidle/cpuidle-qcom.c
new file mode 100644
index 000000000000..aa6a6c9a3590
--- /dev/null
+++ b/drivers/cpuidle/cpuidle-qcom.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2014, Linaro Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#include <linux/cpuidle.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <soc/qcom/pm.h>
+#include "dt_idle_states.h"
+
+static struct qcom_cpu_pm_ops *lpm_ops;
+
+static int qcom_cpu_stby(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv, int index)
+{
+ int ret;
+
+ ret = lpm_ops->standby(NULL);
+ if (ret)
+ return ret;
+
+ return index;
+}
+
+static int qcom_cpu_spc(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv, int index)
+{
+ int ret;
+
+ ret = lpm_ops->spc(NULL);
+ if (ret)
+ return ret;
+
+ return index;
+}
+
+static struct cpuidle_driver qcom_cpuidle_driver = {
+ .name = "qcom_cpuidle",
+};
+
+static const struct of_device_id qcom_idle_state_match[] = {
+ { .compatible = "qcom,idle-state-stby", .data = qcom_cpu_stby },
+ { .compatible = "qcom,idle-state-spc", .data = qcom_cpu_spc },
+ { },
+};
+
+static int qcom_cpuidle_probe(struct platform_device *pdev)
+{
+ struct cpuidle_driver *drv = &qcom_cpuidle_driver;
+ int ret;
+
+ lpm_ops = pdev->dev.platform_data;
+
+ /* Probe for other states, including standby */
+ ret = dt_init_idle_driver(drv, qcom_idle_state_match, 0);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * We will not register for cpu's cpuidle device here,
+ * they will be registered as and when their power controllers
+ * are ready.
+ */
+ return cpuidle_register_driver(drv);
+}
+
+static struct platform_driver qcom_cpuidle = {
+ .probe = qcom_cpuidle_probe,
+ .driver = {
+ .name = "qcom_cpuidle",
+ },
+};
+
+/*
+ * Register the driver early so the we have a successul registration
+ * when the device shows up.
+ * This way the cpuidle driver could be registered before the cpuidle
+ * devices are registered.
+ */
+static int __init qcom_cpuidle_driver_init(void)
+{
+ return platform_driver_register(&qcom_cpuidle);
+}
+core_initcall(qcom_cpuidle_driver_init);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("CPUIDLE driver for QCOM SoC");
+MODULE_ALIAS("platform:qcom-cpuidle");