| 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * Copyright (C) 2016 Freescale Semiconductor, Inc. |
| 4 | * Copyright 2017-2018 NXP |
| 5 | * Anson Huang <Anson.Huang@nxp.com> |
| 6 | */ |
| 7 | |
| 8 | #include <linux/cpuidle.h> |
| 9 | #include <linux/module.h> |
| 10 | #include <asm/cpuidle.h> |
| 11 | |
| 12 | #include "common.h" |
| 13 | #include "cpuidle.h" |
| 14 | |
| 15 | static int imx7ulp_enter_wait(struct cpuidle_device *dev, |
| 16 | struct cpuidle_driver *drv, int index) |
| 17 | { |
| 18 | if (index == 1) |
| 19 | imx7ulp_set_lpm(ULP_PM_WAIT); |
| 20 | else |
| 21 | imx7ulp_set_lpm(ULP_PM_STOP); |
| 22 | |
| 23 | cpu_do_idle(); |
| 24 | |
| 25 | imx7ulp_set_lpm(ULP_PM_RUN); |
| 26 | |
| 27 | return index; |
| 28 | } |
| 29 | |
| 30 | static struct cpuidle_driver imx7ulp_cpuidle_driver = { |
| 31 | .name = "imx7ulp_cpuidle", |
| 32 | .owner = THIS_MODULE, |
| 33 | .states = { |
| 34 | /* WFI */ |
| 35 | ARM_CPUIDLE_WFI_STATE, |
| 36 | /* WAIT */ |
| 37 | { |
| 38 | .exit_latency = 50, |
| 39 | .target_residency = 75, |
| 40 | .enter = imx7ulp_enter_wait, |
| 41 | .name = "WAIT", |
| 42 | .desc = "PSTOP2", |
| 43 | }, |
| 44 | /* STOP */ |
| 45 | { |
| 46 | .exit_latency = 100, |
| 47 | .target_residency = 150, |
| 48 | .enter = imx7ulp_enter_wait, |
| 49 | .name = "STOP", |
| 50 | .desc = "PSTOP1", |
| 51 | }, |
| 52 | }, |
| 53 | .state_count = 3, |
| 54 | .safe_state_index = 0, |
| 55 | }; |
| 56 | |
| 57 | int __init imx7ulp_cpuidle_init(void) |
| 58 | { |
| 59 | return cpuidle_register(&imx7ulp_cpuidle_driver, NULL); |
| 60 | } |