ARM: clps711x: Add cpuidle driver (7c7f8f7f) · Commits · 戴 / test

drivers/cpuidle/Kconfig.arm

+6 −0

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		@@ -13,6 +13,12 @@ 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

drivers/cpuidle/Makefile

+1 −0

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		@@ -8,6 +8,7 @@ obj-$(CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED) += coupled.o
		##################################################################################
		# ARM SoC drivers
		obj-$(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

drivers/cpuidle/cpuidle-clps711x.c

0 → 100644

+64 −0

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		/*
		* 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");

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