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>
175 lines
4 KiB
C
175 lines
4 KiB
C
/* linux/arch/arm/mach-s5pv210/pm.c
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*
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* Copyright (c) 2010 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* S5PV210 - Power Management support
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*
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* Based on arch/arm/mach-s3c2410/pm.c
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* Copyright (c) 2006 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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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/suspend.h>
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#include <linux/syscore_ops.h>
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#include <linux/io.h>
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#include <plat/cpu.h>
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#include <plat/pm.h>
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#include <plat/regs-timer.h>
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#include <mach/regs-irq.h>
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#include <mach/regs-clock.h>
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static struct sleep_save s5pv210_core_save[] = {
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/* Clock source */
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SAVE_ITEM(S5P_CLK_SRC0),
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SAVE_ITEM(S5P_CLK_SRC1),
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SAVE_ITEM(S5P_CLK_SRC2),
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SAVE_ITEM(S5P_CLK_SRC3),
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SAVE_ITEM(S5P_CLK_SRC4),
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SAVE_ITEM(S5P_CLK_SRC5),
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SAVE_ITEM(S5P_CLK_SRC6),
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/* Clock source Mask */
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SAVE_ITEM(S5P_CLK_SRC_MASK0),
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SAVE_ITEM(S5P_CLK_SRC_MASK1),
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/* Clock Divider */
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SAVE_ITEM(S5P_CLK_DIV0),
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SAVE_ITEM(S5P_CLK_DIV1),
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SAVE_ITEM(S5P_CLK_DIV2),
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SAVE_ITEM(S5P_CLK_DIV3),
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SAVE_ITEM(S5P_CLK_DIV4),
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SAVE_ITEM(S5P_CLK_DIV5),
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SAVE_ITEM(S5P_CLK_DIV6),
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SAVE_ITEM(S5P_CLK_DIV7),
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/* Clock Main Gate */
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SAVE_ITEM(S5P_CLKGATE_MAIN0),
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SAVE_ITEM(S5P_CLKGATE_MAIN1),
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SAVE_ITEM(S5P_CLKGATE_MAIN2),
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/* Clock source Peri Gate */
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SAVE_ITEM(S5P_CLKGATE_PERI0),
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SAVE_ITEM(S5P_CLKGATE_PERI1),
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/* Clock source SCLK Gate */
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SAVE_ITEM(S5P_CLKGATE_SCLK0),
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SAVE_ITEM(S5P_CLKGATE_SCLK1),
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/* Clock IP Clock gate */
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SAVE_ITEM(S5P_CLKGATE_IP0),
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SAVE_ITEM(S5P_CLKGATE_IP1),
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SAVE_ITEM(S5P_CLKGATE_IP2),
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SAVE_ITEM(S5P_CLKGATE_IP3),
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SAVE_ITEM(S5P_CLKGATE_IP4),
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/* Clock Blcok and Bus gate */
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SAVE_ITEM(S5P_CLKGATE_BLOCK),
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SAVE_ITEM(S5P_CLKGATE_BUS0),
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/* Clock ETC */
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SAVE_ITEM(S5P_CLK_OUT),
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SAVE_ITEM(S5P_MDNIE_SEL),
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/* PWM Register */
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SAVE_ITEM(S3C2410_TCFG0),
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SAVE_ITEM(S3C2410_TCFG1),
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SAVE_ITEM(S3C64XX_TINT_CSTAT),
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SAVE_ITEM(S3C2410_TCON),
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SAVE_ITEM(S3C2410_TCNTB(0)),
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SAVE_ITEM(S3C2410_TCMPB(0)),
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SAVE_ITEM(S3C2410_TCNTO(0)),
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};
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void s5pv210_cpu_suspend(void)
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{
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unsigned long tmp;
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/* issue the standby signal into the pm unit. Note, we
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* issue a write-buffer drain just in case */
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tmp = 0;
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asm("b 1f\n\t"
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".align 5\n\t"
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"1:\n\t"
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"mcr p15, 0, %0, c7, c10, 5\n\t"
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"mcr p15, 0, %0, c7, c10, 4\n\t"
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"wfi" : : "r" (tmp));
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/* we should never get past here */
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panic("sleep resumed to originator?");
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}
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static void s5pv210_pm_prepare(void)
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{
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unsigned int tmp;
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/* ensure at least INFORM0 has the resume address */
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__raw_writel(virt_to_phys(s3c_cpu_resume), S5P_INFORM0);
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tmp = __raw_readl(S5P_SLEEP_CFG);
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tmp &= ~(S5P_SLEEP_CFG_OSC_EN | S5P_SLEEP_CFG_USBOSC_EN);
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__raw_writel(tmp, S5P_SLEEP_CFG);
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/* WFI for SLEEP mode configuration by SYSCON */
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tmp = __raw_readl(S5P_PWR_CFG);
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tmp &= S5P_CFG_WFI_CLEAN;
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tmp |= S5P_CFG_WFI_SLEEP;
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__raw_writel(tmp, S5P_PWR_CFG);
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/* SYSCON interrupt handling disable */
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tmp = __raw_readl(S5P_OTHERS);
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tmp |= S5P_OTHER_SYSC_INTOFF;
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__raw_writel(tmp, S5P_OTHERS);
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s3c_pm_do_save(s5pv210_core_save, ARRAY_SIZE(s5pv210_core_save));
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}
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static int s5pv210_pm_add(struct sys_device *sysdev)
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{
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pm_cpu_prep = s5pv210_pm_prepare;
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pm_cpu_sleep = s5pv210_cpu_suspend;
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return 0;
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}
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static struct sysdev_driver s5pv210_pm_driver = {
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.add = s5pv210_pm_add,
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};
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static __init int s5pv210_pm_drvinit(void)
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{
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return sysdev_driver_register(&s5pv210_sysclass, &s5pv210_pm_driver);
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}
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arch_initcall(s5pv210_pm_drvinit);
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static void s5pv210_pm_resume(void)
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{
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u32 tmp;
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tmp = __raw_readl(S5P_OTHERS);
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tmp |= (S5P_OTHERS_RET_IO | S5P_OTHERS_RET_CF |\
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S5P_OTHERS_RET_MMC | S5P_OTHERS_RET_UART);
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__raw_writel(tmp , S5P_OTHERS);
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s3c_pm_do_restore_core(s5pv210_core_save, ARRAY_SIZE(s5pv210_core_save));
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}
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static struct syscore_ops s5pv210_pm_syscore_ops = {
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.resume = s5pv210_pm_resume,
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};
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static __init int s5pv210_pm_syscore_init(void)
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{
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register_syscore_ops(&s5pv210_pm_syscore_ops);
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return 0;
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}
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arch_initcall(s5pv210_pm_syscore_init);
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