| 1 | /* |
| 2 | * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> |
| 3 | * JZ4740 SoC power management support |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License as published by the |
| 7 | * Free Software Foundation; either version 2 of the License, or (at your |
| 8 | * option) any later version. |
| 9 | * |
| 10 | * You should have received a copy of the GNU General Public License along |
| 11 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 12 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/pm.h> |
| 18 | #include <linux/delay.h> |
| 19 | #include <linux/suspend.h> |
| 20 | #include <asm/mach-jz4740/regs.h> |
| 21 | #include <asm/mach-jz4740/clock.h> |
| 22 | |
| 23 | #include "clock.h" |
| 24 | |
| 25 | extern void jz4740_intc_suspend(void); |
| 26 | extern void jz4740_intc_resume(void); |
| 27 | extern void jz_gpio_suspend(void); |
| 28 | extern void jz_gpio_resume(void); |
| 29 | |
| 30 | static int jz_pm_enter(suspend_state_t state) |
| 31 | { |
| 32 | jz_gpio_suspend(); |
| 33 | jz4740_intc_suspend(); |
| 34 | jz4740_clock_suspend(); |
| 35 | |
| 36 | jz4740_clock_set_wait_mode(JZ4740_WAIT_MODE_SLEEP); |
| 37 | |
| 38 | __asm__(".set\tmips3\n\t" |
| 39 | "wait\n\t" |
| 40 | ".set\tmips0"); |
| 41 | |
| 42 | jz4740_clock_set_wait_mode(JZ4740_WAIT_MODE_IDLE); |
| 43 | |
| 44 | jz4740_clock_resume(); |
| 45 | jz4740_intc_resume(); |
| 46 | jz_gpio_resume(); |
| 47 | |
| 48 | return 0; |
| 49 | } |
| 50 | |
| 51 | static struct platform_suspend_ops jz_pm_ops = { |
| 52 | .valid = suspend_valid_only_mem, |
| 53 | .enter = jz_pm_enter, |
| 54 | }; |
| 55 | |
| 56 | /* |
| 57 | * Initialize power interface |
| 58 | */ |
| 59 | int __init jz_pm_init(void) |
| 60 | { |
| 61 | suspend_set_ops(&jz_pm_ops); |
| 62 | return 0; |
| 63 | |
| 64 | } |
| 65 | late_initcall(jz_pm_init); |
| 66 | |
