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https://github.com/edk2-porting/linux-next.git
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bb072c3cf2
Replace sysdev classes and struct sys_device objects used for "core" power management by Samsung platforms with struct syscore_ops objects that are simpler. This generally reduces the code size and the kernel memory footprint. It also is necessary for removing sysdevs entirely from the kernel in the future. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Acked-by: Kukjin Kim <kgene.kim@samsung.com>
96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
/* linux/arch/arm/plat-s3c24xx/irq-om.c
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*
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* Copyright (c) 2003-2004 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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* http://armlinux.simtec.co.uk/
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*
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* S3C24XX - IRQ PM code
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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/init.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <plat/cpu.h>
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#include <plat/pm.h>
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#include <plat/irq.h>
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#include <asm/irq.h>
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/* state for IRQs over sleep */
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/* default is to allow for EINT0..EINT15, and IRQ_RTC as wakeup sources
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*
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* set bit to 1 in allow bitfield to enable the wakeup settings on it
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*/
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unsigned long s3c_irqwake_intallow = 1L << (IRQ_RTC - IRQ_EINT0) | 0xfL;
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unsigned long s3c_irqwake_eintallow = 0x0000fff0L;
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int s3c_irq_wake(struct irq_data *data, unsigned int state)
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{
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unsigned long irqbit = 1 << (data->irq - IRQ_EINT0);
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if (!(s3c_irqwake_intallow & irqbit))
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return -ENOENT;
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printk(KERN_INFO "wake %s for irq %d\n",
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state ? "enabled" : "disabled", data->irq);
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if (!state)
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s3c_irqwake_intmask |= irqbit;
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else
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s3c_irqwake_intmask &= ~irqbit;
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return 0;
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}
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static struct sleep_save irq_save[] = {
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SAVE_ITEM(S3C2410_INTMSK),
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SAVE_ITEM(S3C2410_INTSUBMSK),
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};
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/* the extint values move between the s3c2410/s3c2440 and the s3c2412
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* so we use an array to hold them, and to calculate the address of
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* the register at run-time
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*/
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static unsigned long save_extint[3];
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static unsigned long save_eintflt[4];
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static unsigned long save_eintmask;
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int s3c24xx_irq_suspend(void)
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{
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(save_extint); i++)
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save_extint[i] = __raw_readl(S3C24XX_EXTINT0 + (i*4));
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for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
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save_eintflt[i] = __raw_readl(S3C24XX_EINFLT0 + (i*4));
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s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
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save_eintmask = __raw_readl(S3C24XX_EINTMASK);
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return 0;
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}
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void s3c24xx_irq_resume(void)
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{
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(save_extint); i++)
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__raw_writel(save_extint[i], S3C24XX_EXTINT0 + (i*4));
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for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
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__raw_writel(save_eintflt[i], S3C24XX_EINFLT0 + (i*4));
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s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
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__raw_writel(save_eintmask, S3C24XX_EINTMASK);
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}
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