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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b81ad56b07
This patch removes old 24xx PM code that does not really work for sleep states, and uses old power management register access. Working PM code will be added later. Signed-off-by: Tony Lindgren <tony@atomide.com>
120 lines
2.3 KiB
C
120 lines
2.3 KiB
C
/*
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* linux/arch/arm/mach-omap2/pm.c
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*
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* OMAP2 Power Management Routines
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*
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* Copyright (C) 2006 Nokia Corporation
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* Tony Lindgren <tony@atomide.com>
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*
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* Copyright (C) 2005 Texas Instruments, Inc.
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* Richard Woodruff <r-woodruff2@ti.com>
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*
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* Based on pm.c for omap1
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/suspend.h>
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#include <linux/sched.h>
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#include <linux/proc_fs.h>
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#include <linux/interrupt.h>
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#include <linux/sysfs.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/clk.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/atomic.h>
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#include <asm/mach/time.h>
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#include <asm/mach/irq.h>
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#include <asm/mach-types.h>
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#include <asm/arch/irqs.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/sram.h>
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#include <asm/arch/pm.h>
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static struct clk *vclk;
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static void (*omap2_sram_idle)(void);
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static void (*omap2_sram_suspend)(int dllctrl, int cpu_rev);
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static void (*saved_idle)(void);
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extern void __init pmdomain_init(void);
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extern void pmdomain_set_autoidle(void);
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static unsigned int omap24xx_sleep_save[OMAP24XX_SLEEP_SAVE_SIZE];
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void omap2_pm_idle(void)
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{
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local_irq_disable();
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local_fiq_disable();
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if (need_resched()) {
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local_fiq_enable();
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local_irq_enable();
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return;
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}
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/*
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* Since an interrupt may set up a timer, we don't want to
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* reprogram the hardware timer with interrupts enabled.
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* Re-enable interrupts only after returning from idle.
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*/
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timer_dyn_reprogram();
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omap2_sram_idle();
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local_fiq_enable();
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local_irq_enable();
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}
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static int omap2_pm_prepare(void)
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{
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/* We cannot sleep in idle until we have resumed */
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saved_idle = pm_idle;
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pm_idle = NULL;
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return 0;
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}
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static int omap2_pm_suspend(void)
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{
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return 0;
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}
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static int omap2_pm_enter(suspend_state_t state)
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{
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int ret = 0;
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switch (state)
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{
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case PM_SUSPEND_STANDBY:
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case PM_SUSPEND_MEM:
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ret = omap2_pm_suspend();
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break;
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default:
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ret = -EINVAL;
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}
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return ret;
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}
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static void omap2_pm_finish(void)
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{
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pm_idle = saved_idle;
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}
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static struct platform_suspend_ops omap_pm_ops = {
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.prepare = omap2_pm_prepare,
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.enter = omap2_pm_enter,
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.finish = omap2_pm_finish,
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.valid = suspend_valid_only_mem,
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};
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int __init omap2_pm_init(void)
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{
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return 0;
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}
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__initcall(omap2_pm_init);
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