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[ARM] 3430/1: ARM: OMAP: 5/8 Update PM
Patch from Tony Lindgren Update OMAP PM code from linux-omap tree: - Move PM code from plat-omap to mach-omap1 and mach-omap2 by Tony Lindgren - Add minimal PM support for omap24xx by Tony Lindgren and Richard Woodruff - Misc updates to omap1 PM code by Tuukka Tikkanen et al - Updates to the SRAM code needed for PM and FB by Imre Deak Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Tony Lindgren
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Russell King
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Apr 2, 2006
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,149 @@ | ||
| /* | ||
| * linux/arch/arm/mach-omap2/pm.c | ||
| * | ||
| * OMAP2 Power Management Routines | ||
| * | ||
| * Copyright (C) 2006 Nokia Corporation | ||
| * Tony Lindgren <tony@atomide.com> | ||
| * | ||
| * Copyright (C) 2005 Texas Instruments, Inc. | ||
| * Richard Woodruff <r-woodruff2@ti.com> | ||
| * | ||
| * Based on pm.c for omap1 | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License version 2 as | ||
| * published by the Free Software Foundation. | ||
| */ | ||
|
|
||
| #include <linux/pm.h> | ||
| #include <linux/sched.h> | ||
| #include <linux/proc_fs.h> | ||
| #include <linux/pm.h> | ||
| #include <linux/interrupt.h> | ||
| #include <linux/sysfs.h> | ||
| #include <linux/module.h> | ||
|
|
||
| #include <asm/io.h> | ||
| #include <asm/irq.h> | ||
| #include <asm/atomic.h> | ||
| #include <asm/mach/time.h> | ||
| #include <asm/mach/irq.h> | ||
| #include <asm/mach-types.h> | ||
|
|
||
| #include <asm/arch/irqs.h> | ||
| #include <asm/arch/clock.h> | ||
| #include <asm/arch/sram.h> | ||
| #include <asm/arch/pm.h> | ||
|
|
||
| static struct clk *vclk; | ||
| static void (*omap2_sram_idle)(void); | ||
| static void (*omap2_sram_suspend)(int dllctrl, int cpu_rev); | ||
| static void (*saved_idle)(void); | ||
|
|
||
| void omap2_pm_idle(void) | ||
| { | ||
| local_irq_disable(); | ||
| local_fiq_disable(); | ||
| if (need_resched()) { | ||
| local_fiq_enable(); | ||
| local_irq_enable(); | ||
| return; | ||
| } | ||
|
|
||
| /* | ||
| * Since an interrupt may set up a timer, we don't want to | ||
| * reprogram the hardware timer with interrupts enabled. | ||
| * Re-enable interrupts only after returning from idle. | ||
| */ | ||
| timer_dyn_reprogram(); | ||
|
|
||
| omap2_sram_idle(); | ||
| local_fiq_enable(); | ||
| local_irq_enable(); | ||
| } | ||
|
|
||
| static int omap2_pm_prepare(suspend_state_t state) | ||
| { | ||
| int error = 0; | ||
|
|
||
| /* We cannot sleep in idle until we have resumed */ | ||
| saved_idle = pm_idle; | ||
| pm_idle = NULL; | ||
|
|
||
| switch (state) | ||
| { | ||
| case PM_SUSPEND_STANDBY: | ||
| case PM_SUSPEND_MEM: | ||
| break; | ||
|
|
||
| case PM_SUSPEND_DISK: | ||
| return -ENOTSUPP; | ||
|
|
||
| default: | ||
| return -EINVAL; | ||
| } | ||
|
|
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| return error; | ||
| } | ||
|
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||
| static int omap2_pm_enter(suspend_state_t state) | ||
| { | ||
| switch (state) | ||
| { | ||
| case PM_SUSPEND_STANDBY: | ||
| case PM_SUSPEND_MEM: | ||
| /* FIXME: Add suspend */ | ||
| break; | ||
|
|
||
| case PM_SUSPEND_DISK: | ||
| return -ENOTSUPP; | ||
|
|
||
| default: | ||
| return -EINVAL; | ||
| } | ||
|
|
||
| return 0; | ||
| } | ||
|
|
||
| static int omap2_pm_finish(suspend_state_t state) | ||
| { | ||
| pm_idle = saved_idle; | ||
| return 0; | ||
| } | ||
|
|
||
| static struct pm_ops omap_pm_ops = { | ||
| .pm_disk_mode = 0, | ||
| .prepare = omap2_pm_prepare, | ||
| .enter = omap2_pm_enter, | ||
| .finish = omap2_pm_finish, | ||
| }; | ||
|
|
||
| int __init omap2_pm_init(void) | ||
| { | ||
| printk("Power Management for TI OMAP.\n"); | ||
|
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||
| vclk = clk_get(NULL, "virt_prcm_set"); | ||
| if (IS_ERR(vclk)) { | ||
| printk(KERN_ERR "Could not get PM vclk\n"); | ||
| return -ENODEV; | ||
| } | ||
|
|
||
| /* | ||
| * We copy the assembler sleep/wakeup routines to SRAM. | ||
| * These routines need to be in SRAM as that's the only | ||
| * memory the MPU can see when it wakes up. | ||
| */ | ||
| omap2_sram_idle = omap_sram_push(omap24xx_idle_loop_suspend, | ||
| omap24xx_idle_loop_suspend_sz); | ||
|
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| omap2_sram_suspend = omap_sram_push(omap24xx_cpu_suspend, | ||
| omap24xx_cpu_suspend_sz); | ||
|
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| pm_set_ops(&omap_pm_ops); | ||
| pm_idle = omap2_pm_idle; | ||
|
|
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| return 0; | ||
| } | ||
|
|
||
| __initcall(omap2_pm_init); |
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