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ARM: S5PV210: Add Power Management Support
This patch adds suspend-to-ram support for S5PV210. Note. This patch is confirmed on SMDKV210 and SMDKC110 board. Signed-off-by: Jongpill Lee <boyko.lee@samsung.com> Signed-off-by: Sangbeom Kim <sbkim73@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
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Jongpill Lee
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Kukjin Kim
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Oct 20, 2010
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| /* linux/arch/arm/mach-s5pv210/include/mach/pm-core.h | ||
| * | ||
| * Copyright (c) 2010 Samsung Electronics Co., Ltd. | ||
| * http://www.samsung.com | ||
| * | ||
| * Based on arch/arm/mach-s3c2410/include/mach/pm-core.h, | ||
| * Copyright 2008 Simtec Electronics | ||
| * Ben Dooks <ben@simtec.co.uk> | ||
| * http://armlinux.simtec.co.uk/ | ||
| * | ||
| * S5PV210 - PM core support for arch/arm/plat-s5p/pm.c | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
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| static inline void s3c_pm_debug_init_uart(void) | ||
| { | ||
| /* nothing here yet */ | ||
| } | ||
|
|
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| static inline void s3c_pm_arch_prepare_irqs(void) | ||
| { | ||
| __raw_writel(s3c_irqwake_intmask, S5P_WAKEUP_MASK); | ||
| __raw_writel(s3c_irqwake_eintmask, S5P_EINT_WAKEUP_MASK); | ||
| } | ||
|
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| static inline void s3c_pm_arch_stop_clocks(void) | ||
| { | ||
| /* nothing here yet */ | ||
| } | ||
|
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| static inline void s3c_pm_arch_show_resume_irqs(void) | ||
| { | ||
| /* nothing here yet */ | ||
| } | ||
|
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| static inline void s3c_pm_arch_update_uart(void __iomem *regs, | ||
| struct pm_uart_save *save) | ||
| { | ||
| /* nothing here yet */ | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,166 @@ | ||
| /* linux/arch/arm/mach-s5pv210/pm.c | ||
| * | ||
| * Copyright (c) 2010 Samsung Electronics Co., Ltd. | ||
| * http://www.samsung.com | ||
| * | ||
| * S5PV210 - Power Management support | ||
| * | ||
| * Based on arch/arm/mach-s3c2410/pm.c | ||
| * Copyright (c) 2006 Simtec Electronics | ||
| * Ben Dooks <ben@simtec.co.uk> | ||
| * | ||
| * 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/init.h> | ||
| #include <linux/suspend.h> | ||
| #include <linux/io.h> | ||
|
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| #include <plat/cpu.h> | ||
| #include <plat/pm.h> | ||
| #include <plat/regs-timer.h> | ||
|
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| #include <mach/regs-irq.h> | ||
| #include <mach/regs-clock.h> | ||
|
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| static struct sleep_save s5pv210_core_save[] = { | ||
| /* Clock source */ | ||
| SAVE_ITEM(S5P_CLK_SRC0), | ||
| SAVE_ITEM(S5P_CLK_SRC1), | ||
| SAVE_ITEM(S5P_CLK_SRC2), | ||
| SAVE_ITEM(S5P_CLK_SRC3), | ||
| SAVE_ITEM(S5P_CLK_SRC4), | ||
| SAVE_ITEM(S5P_CLK_SRC5), | ||
| SAVE_ITEM(S5P_CLK_SRC6), | ||
|
|
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| /* Clock source Mask */ | ||
| SAVE_ITEM(S5P_CLK_SRC_MASK0), | ||
| SAVE_ITEM(S5P_CLK_SRC_MASK1), | ||
|
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||
| /* Clock Divider */ | ||
| SAVE_ITEM(S5P_CLK_DIV0), | ||
| SAVE_ITEM(S5P_CLK_DIV1), | ||
| SAVE_ITEM(S5P_CLK_DIV2), | ||
| SAVE_ITEM(S5P_CLK_DIV3), | ||
| SAVE_ITEM(S5P_CLK_DIV4), | ||
| SAVE_ITEM(S5P_CLK_DIV5), | ||
| SAVE_ITEM(S5P_CLK_DIV6), | ||
| SAVE_ITEM(S5P_CLK_DIV7), | ||
|
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||
| /* Clock Main Gate */ | ||
| SAVE_ITEM(S5P_CLKGATE_MAIN0), | ||
| SAVE_ITEM(S5P_CLKGATE_MAIN1), | ||
| SAVE_ITEM(S5P_CLKGATE_MAIN2), | ||
|
|
||
| /* Clock source Peri Gate */ | ||
| SAVE_ITEM(S5P_CLKGATE_PERI0), | ||
| SAVE_ITEM(S5P_CLKGATE_PERI1), | ||
|
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||
| /* Clock source SCLK Gate */ | ||
| SAVE_ITEM(S5P_CLKGATE_SCLK0), | ||
| SAVE_ITEM(S5P_CLKGATE_SCLK1), | ||
|
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||
| /* Clock IP Clock gate */ | ||
| SAVE_ITEM(S5P_CLKGATE_IP0), | ||
| SAVE_ITEM(S5P_CLKGATE_IP1), | ||
| SAVE_ITEM(S5P_CLKGATE_IP2), | ||
| SAVE_ITEM(S5P_CLKGATE_IP3), | ||
| SAVE_ITEM(S5P_CLKGATE_IP4), | ||
|
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| /* Clock Blcok and Bus gate */ | ||
| SAVE_ITEM(S5P_CLKGATE_BLOCK), | ||
| SAVE_ITEM(S5P_CLKGATE_BUS0), | ||
|
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| /* Clock ETC */ | ||
| SAVE_ITEM(S5P_CLK_OUT), | ||
| SAVE_ITEM(S5P_MDNIE_SEL), | ||
|
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| /* PWM Register */ | ||
| SAVE_ITEM(S3C2410_TCFG0), | ||
| SAVE_ITEM(S3C2410_TCFG1), | ||
| SAVE_ITEM(S3C64XX_TINT_CSTAT), | ||
| SAVE_ITEM(S3C2410_TCON), | ||
| SAVE_ITEM(S3C2410_TCNTB(0)), | ||
| SAVE_ITEM(S3C2410_TCMPB(0)), | ||
| SAVE_ITEM(S3C2410_TCNTO(0)), | ||
| }; | ||
|
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| void s5pv210_cpu_suspend(void) | ||
| { | ||
| unsigned long tmp; | ||
|
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| /* issue the standby signal into the pm unit. Note, we | ||
| * issue a write-buffer drain just in case */ | ||
|
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| tmp = 0; | ||
|
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| asm("b 1f\n\t" | ||
| ".align 5\n\t" | ||
| "1:\n\t" | ||
| "mcr p15, 0, %0, c7, c10, 5\n\t" | ||
| "mcr p15, 0, %0, c7, c10, 4\n\t" | ||
| "wfi" : : "r" (tmp)); | ||
|
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| /* we should never get past here */ | ||
| panic("sleep resumed to originator?"); | ||
| } | ||
|
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| static void s5pv210_pm_prepare(void) | ||
| { | ||
| unsigned int tmp; | ||
|
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| /* ensure at least INFORM0 has the resume address */ | ||
| __raw_writel(virt_to_phys(s3c_cpu_resume), S5P_INFORM0); | ||
|
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| tmp = __raw_readl(S5P_SLEEP_CFG); | ||
| tmp &= ~(S5P_SLEEP_CFG_OSC_EN | S5P_SLEEP_CFG_USBOSC_EN); | ||
| __raw_writel(tmp, S5P_SLEEP_CFG); | ||
|
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| /* WFI for SLEEP mode configuration by SYSCON */ | ||
| tmp = __raw_readl(S5P_PWR_CFG); | ||
| tmp &= S5P_CFG_WFI_CLEAN; | ||
| tmp |= S5P_CFG_WFI_SLEEP; | ||
| __raw_writel(tmp, S5P_PWR_CFG); | ||
|
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| /* SYSCON interrupt handling disable */ | ||
| tmp = __raw_readl(S5P_OTHERS); | ||
| tmp |= S5P_OTHER_SYSC_INTOFF; | ||
| __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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| static int s5pv210_pm_add(struct sys_device *sysdev) | ||
| { | ||
| pm_cpu_prep = s5pv210_pm_prepare; | ||
| pm_cpu_sleep = s5pv210_cpu_suspend; | ||
|
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| return 0; | ||
| } | ||
|
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| static int s5pv210_pm_resume(struct sys_device *dev) | ||
| { | ||
| u32 tmp; | ||
|
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| tmp = __raw_readl(S5P_OTHERS); | ||
| tmp |= (S5P_OTHERS_RET_IO | S5P_OTHERS_RET_CF |\ | ||
| S5P_OTHERS_RET_MMC | S5P_OTHERS_RET_UART); | ||
| __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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| return 0; | ||
| } | ||
|
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| static struct sysdev_driver s5pv210_pm_driver = { | ||
| .add = s5pv210_pm_add, | ||
| .resume = s5pv210_pm_resume, | ||
| }; | ||
|
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| static __init int s5pv210_pm_drvinit(void) | ||
| { | ||
| return sysdev_driver_register(&s5pv210_sysclass, &s5pv210_pm_driver); | ||
| } | ||
| arch_initcall(s5pv210_pm_drvinit); |
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