| Anson Huang | 751f7e9 | 2014-01-09 16:03:16 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 Freescale Semiconductor, Inc. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/cpuidle.h> |
| 10 | #include <linux/module.h> |
| 11 | #include <asm/cpuidle.h> |
| 12 | #include <asm/proc-fns.h> |
| 13 | |
| 14 | #include "common.h" |
| 15 | #include "cpuidle.h" |
| 16 | |
| 17 | static int imx6sl_enter_wait(struct cpuidle_device *dev, |
| 18 | struct cpuidle_driver *drv, int index) |
| 19 | { |
| 20 | imx6q_set_lpm(WAIT_UNCLOCKED); |
| 21 | /* |
| 22 | * Software workaround for ERR005311, see function |
| 23 | * description for details. |
| 24 | */ |
| 25 | imx6sl_set_wait_clk(true); |
| 26 | cpu_do_idle(); |
| 27 | imx6sl_set_wait_clk(false); |
| 28 | imx6q_set_lpm(WAIT_CLOCKED); |
| 29 | |
| 30 | return index; |
| 31 | } |
| 32 | |
| 33 | static struct cpuidle_driver imx6sl_cpuidle_driver = { |
| 34 | .name = "imx6sl_cpuidle", |
| 35 | .owner = THIS_MODULE, |
| 36 | .states = { |
| 37 | /* WFI */ |
| 38 | ARM_CPUIDLE_WFI_STATE, |
| 39 | /* WAIT */ |
| 40 | { |
| 41 | .exit_latency = 50, |
| 42 | .target_residency = 75, |
| 43 | .flags = CPUIDLE_FLAG_TIME_VALID | |
| 44 | CPUIDLE_FLAG_TIMER_STOP, |
| 45 | .enter = imx6sl_enter_wait, |
| 46 | .name = "WAIT", |
| 47 | .desc = "Clock off", |
| 48 | }, |
| 49 | }, |
| 50 | .state_count = 2, |
| 51 | .safe_state_index = 0, |
| 52 | }; |
| 53 | |
| 54 | int __init imx6sl_cpuidle_init(void) |
| 55 | { |
| 56 | return cpuidle_register(&imx6sl_cpuidle_driver, NULL); |
| 57 | } |