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6b6844dd54
Add suspend-to-ram support for SMDK6440/50 Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
/* linux/arch/arm/mach-s5p64x0/irq-pm.c
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*
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* Copyright (c) 2011 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* S5P64X0 - Interrupt handling Power Management
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*
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* Based on arch/arm/mach-s3c64xx/irq-pm.c by Ben Dooks
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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/syscore_ops.h>
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#include <linux/serial_core.h>
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#include <linux/io.h>
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#include <plat/regs-serial.h>
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#include <plat/pm.h>
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#include <mach/regs-gpio.h>
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static struct sleep_save irq_save[] = {
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SAVE_ITEM(S5P64X0_EINT0CON0),
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SAVE_ITEM(S5P64X0_EINT0FLTCON0),
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SAVE_ITEM(S5P64X0_EINT0FLTCON1),
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SAVE_ITEM(S5P64X0_EINT0MASK),
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};
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static struct irq_grp_save {
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u32 con;
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u32 fltcon;
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u32 mask;
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} eint_grp_save[4];
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static u32 irq_uart_mask[CONFIG_SERIAL_SAMSUNG_UARTS];
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static int s5p64x0_irq_pm_suspend(void)
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{
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struct irq_grp_save *grp = eint_grp_save;
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int i;
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S3C_PMDBG("%s: suspending IRQs\n", __func__);
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s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
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for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
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irq_uart_mask[i] = __raw_readl(S3C_VA_UARTx(i) + S3C64XX_UINTM);
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for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
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grp->con = __raw_readl(S5P64X0_EINT12CON + (i * 4));
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grp->mask = __raw_readl(S5P64X0_EINT12MASK + (i * 4));
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grp->fltcon = __raw_readl(S5P64X0_EINT12FLTCON + (i * 4));
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}
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return 0;
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}
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static void s5p64x0_irq_pm_resume(void)
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{
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struct irq_grp_save *grp = eint_grp_save;
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int i;
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S3C_PMDBG("%s: resuming IRQs\n", __func__);
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s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
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for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
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__raw_writel(irq_uart_mask[i], S3C_VA_UARTx(i) + S3C64XX_UINTM);
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for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
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__raw_writel(grp->con, S5P64X0_EINT12CON + (i * 4));
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__raw_writel(grp->mask, S5P64X0_EINT12MASK + (i * 4));
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__raw_writel(grp->fltcon, S5P64X0_EINT12FLTCON + (i * 4));
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}
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S3C_PMDBG("%s: IRQ configuration restored\n", __func__);
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}
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static struct syscore_ops s5p64x0_irq_syscore_ops = {
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.suspend = s5p64x0_irq_pm_suspend,
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.resume = s5p64x0_irq_pm_resume,
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};
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static int __init s5p64x0_syscore_init(void)
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{
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register_syscore_ops(&s5p64x0_irq_syscore_ops);
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return 0;
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}
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core_initcall(s5p64x0_syscore_init);
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