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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/init.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,
- },
- };
- builtin_platform_driver_probe(clps711x_cpuidle_driver, clps711x_cpuidle_probe);
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