Commit | Line | Data |
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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); |