diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/cpuidle/Kconfig.arm | 7 | ||||
| -rw-r--r-- | drivers/cpuidle/Makefile | 1 | ||||
| -rw-r--r-- | drivers/cpuidle/cpuidle-qcom.c | 99 |
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"); |