projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c7f8f7f AS |
1 | /* |
| 2 | * CLPS711X CPU idle driver | |
| 3 | * | |
| 4 | * Copyright (C) 2014 Alexander Shiyan <shc_work@mail.ru> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License as published by | |
| 8 | * the Free Software Foundation; either version 2 of the License, or | |
| 9 | * (at your option) any later version. | |
| 10 | */ | |
| 11 | ||
| 12 | #include <linux/cpuidle.h> | |
| 13 | #include <linux/err.h> | |
| 14 | #include <linux/io.h> | |
| 94e8057b | 15 | #include <linux/init.h> |
| 7c7f8f7f AS |
16 | #include <linux/platform_device.h> |
| 17 | ||
| 18 | #define CLPS711X_CPUIDLE_NAME "clps711x-cpuidle" | |
| 19 | ||
| 20 | static void __iomem *clps711x_halt; | |
| 21 | ||
| 22 | static int clps711x_cpuidle_halt(struct cpuidle_device *dev, | |
| 23 | struct cpuidle_driver *drv, int index) | |
| 24 | { | |
| 25 | writel(0xaa, clps711x_halt); | |
| 26 | ||
| 27 | return index; | |
| 28 | } | |
| 29 | ||
| 30 | static struct cpuidle_driver clps711x_idle_driver = { | |
| 31 | .name = CLPS711X_CPUIDLE_NAME, | |
| 32 | .owner = THIS_MODULE, | |
| 33 | .states[0] = { | |
| 34 | .name = "HALT", | |
| 35 | .desc = "CLPS711X HALT", | |
| 36 | .enter = clps711x_cpuidle_halt, | |
| 37 | .exit_latency = 1, | |
| 38 | }, | |
| 39 | .state_count = 1, | |
| 40 | }; | |
| 41 | ||
| 42 | static int __init clps711x_cpuidle_probe(struct platform_device *pdev) | |
| 43 | { | |
| 44 | struct resource *res; | |
| 45 | ||
| 46 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
| 47 | clps711x_halt = devm_ioremap_resource(&pdev->dev, res); | |
| 48 | if (IS_ERR(clps711x_halt)) | |
| 49 | return PTR_ERR(clps711x_halt); | |
| 50 | ||
| 51 | return cpuidle_register(&clps711x_idle_driver, NULL); | |
| 52 | } | |
| 53 | ||
| 54 | static struct platform_driver clps711x_cpuidle_driver = { | |
| 55 | .driver = { | |
| 56 | .name = CLPS711X_CPUIDLE_NAME, | |
| 7c7f8f7f AS |
57 | }, |
| 58 | }; | |
| 94e8057b | 59 | builtin_platform_driver_probe(clps711x_cpuidle_driver, clps711x_cpuidle_probe); |