projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 9952f691 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| be6a98d3 RH |
2 | /* |
| 3 | * Copyright 2012 Calxeda, Inc. | |
| 4 | * | |
| a8e39c35 | 5 | * Based on arch/arm/plat-mxc/cpuidle.c: #v3.7 |
| be6a98d3 RH |
6 | * Copyright 2012 Freescale Semiconductor, Inc. |
| 7 | * Copyright 2012 Linaro Ltd. | |
| 8 | * | |
| a8e39c35 | 9 | * Maintainer: Rob Herring <rob.herring@calxeda.com> |
| be6a98d3 RH |
10 | */ |
| 11 | ||
| 12 | #include <linux/cpuidle.h> | |
| 34a5eeb2 | 13 | #include <linux/cpu_pm.h> |
| be6a98d3 | 14 | #include <linux/init.h> |
| a410146c | 15 | #include <linux/mm.h> |
| 60a66e37 | 16 | #include <linux/platform_device.h> |
| be120397 MR |
17 | #include <linux/psci.h> |
| 18 | ||
| be6a98d3 | 19 | #include <asm/cpuidle.h> |
| be6a98d3 | 20 | #include <asm/suspend.h> |
| be120397 MR |
21 | |
| 22 | #include <uapi/linux/psci.h> | |
| 23 | ||
| 24 | #define CALXEDA_IDLE_PARAM \ | |
| 25 | ((0 << PSCI_0_2_POWER_STATE_ID_SHIFT) | \ | |
| 26 | (0 << PSCI_0_2_POWER_STATE_AFFL_SHIFT) | \ | |
| 27 | (PSCI_POWER_STATE_TYPE_POWER_DOWN << PSCI_0_2_POWER_STATE_TYPE_SHIFT)) | |
| be6a98d3 RH |
28 | |
| 29 | static int calxeda_idle_finish(unsigned long val) | |
| 30 | { | |
| be120397 | 31 | return psci_ops.cpu_suspend(CALXEDA_IDLE_PARAM, __pa(cpu_resume)); |
| be6a98d3 RH |
32 | } |
| 33 | ||
| 34 | static int calxeda_pwrdown_idle(struct cpuidle_device *dev, | |
| 35 | struct cpuidle_driver *drv, | |
| 36 | int index) | |
| 37 | { | |
| 34a5eeb2 | 38 | cpu_pm_enter(); |
| be6a98d3 | 39 | cpu_suspend(0, calxeda_idle_finish); |
| 34a5eeb2 RH |
40 | cpu_pm_exit(); |
| 41 | ||
| be6a98d3 RH |
42 | return index; |
| 43 | } | |
| 44 | ||
| be6a98d3 RH |
45 | static struct cpuidle_driver calxeda_idle_driver = { |
| 46 | .name = "calxeda_idle", | |
| be6a98d3 RH |
47 | .states = { |
| 48 | ARM_CPUIDLE_WFI_STATE, | |
| 49 | { | |
| 50 | .name = "PG", | |
| 51 | .desc = "Power Gate", | |
| be6a98d3 RH |
52 | .exit_latency = 30, |
| 53 | .power_usage = 50, | |
| 54 | .target_residency = 200, | |
| 55 | .enter = calxeda_pwrdown_idle, | |
| 56 | }, | |
| 57 | }, | |
| 58 | .state_count = 2, | |
| 59 | }; | |
| 60 | ||
| 5781532e | 61 | static int calxeda_cpuidle_probe(struct platform_device *pdev) |
| be6a98d3 | 62 | { |
| 0b210d96 | 63 | return cpuidle_register(&calxeda_idle_driver, NULL); |
| be6a98d3 | 64 | } |
| 60a66e37 DL |
65 | |
| 66 | static struct platform_driver calxeda_cpuidle_plat_driver = { | |
| 67 | .driver = { | |
| 68 | .name = "cpuidle-calxeda", | |
| 60a66e37 DL |
69 | }, |
| 70 | .probe = calxeda_cpuidle_probe, | |
| 71 | }; | |
| 090d1cf1 | 72 | builtin_platform_driver(calxeda_cpuidle_plat_driver); |