projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
| 7c7f8f7f AS |
2 | /* |
| 3 | * CLPS711X CPU idle driver | |
| 4 | * | |
| 5 | * Copyright (C) 2014 Alexander Shiyan <shc_work@mail.ru> | |
| 7c7f8f7f AS |
6 | */ |
| 7 | ||
| 8 | #include <linux/cpuidle.h> | |
| 9 | #include <linux/err.h> | |
| 10 | #include <linux/io.h> | |
| 94e8057b | 11 | #include <linux/init.h> |
| 7c7f8f7f AS |
12 | #include <linux/platform_device.h> |
| 13 | ||
| 14 | #define CLPS711X_CPUIDLE_NAME "clps711x-cpuidle" | |
| 15 | ||
| 16 | static void __iomem *clps711x_halt; | |
| 17 | ||
| 18 | static int clps711x_cpuidle_halt(struct cpuidle_device *dev, | |
| 19 | struct cpuidle_driver *drv, int index) | |
| 20 | { | |
| 21 | writel(0xaa, clps711x_halt); | |
| 22 | ||
| 23 | return index; | |
| 24 | } | |
| 25 | ||
| 26 | static struct cpuidle_driver clps711x_idle_driver = { | |
| 27 | .name = CLPS711X_CPUIDLE_NAME, | |
| 28 | .owner = THIS_MODULE, | |
| 29 | .states[0] = { | |
| 30 | .name = "HALT", | |
| 31 | .desc = "CLPS711X HALT", | |
| 32 | .enter = clps711x_cpuidle_halt, | |
| 33 | .exit_latency = 1, | |
| 34 | }, | |
| 35 | .state_count = 1, | |
| 36 | }; | |
| 37 | ||
| 38 | static int __init clps711x_cpuidle_probe(struct platform_device *pdev) | |
| 39 | { | |
| 22c48a43 | 40 | clps711x_halt = devm_platform_ioremap_resource(pdev, 0); |
| 7c7f8f7f AS |
41 | if (IS_ERR(clps711x_halt)) |
| 42 | return PTR_ERR(clps711x_halt); | |
| 43 | ||
| 44 | return cpuidle_register(&clps711x_idle_driver, NULL); | |
| 45 | } | |
| 46 | ||
| 47 | static struct platform_driver clps711x_cpuidle_driver = { | |
| 48 | .driver = { | |
| 49 | .name = CLPS711X_CPUIDLE_NAME, | |
| 7c7f8f7f AS |
50 | }, |
| 51 | }; | |
| 94e8057b | 52 | builtin_platform_driver_probe(clps711x_cpuidle_driver, clps711x_cpuidle_probe); |