Add suspend-to-ram support for SMDK6440/50 Signed-off-by: Abhilash Kesavan <a.kesavan@xxxxxxxxxxx> --- arch/arm/Kconfig | 2 +- arch/arm/mach-s5p64x0/Kconfig | 4 + arch/arm/mach-s5p64x0/Makefile | 1 + arch/arm/mach-s5p64x0/include/mach/map.h | 1 + arch/arm/mach-s5p64x0/include/mach/pm-core.h | 117 +++++++++++++ arch/arm/mach-s5p64x0/include/mach/regs-clock.h | 33 ++++ arch/arm/mach-s5p64x0/include/mach/regs-gpio.h | 19 ++ arch/arm/mach-s5p64x0/irq-eint.c | 2 + arch/arm/mach-s5p64x0/irq-pm.c | 92 ++++++++++ arch/arm/mach-s5p64x0/pm.c | 204 +++++++++++++++++++++++ 10 files changed, 474 insertions(+), 1 deletions(-) create mode 100644 arch/arm/mach-s5p64x0/include/mach/pm-core.h create mode 100644 arch/arm/mach-s5p64x0/irq-pm.c create mode 100644 arch/arm/mach-s5p64x0/pm.c diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 2c71a8f..47aed0d 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -2071,7 +2071,7 @@ menu "Power management options" source "kernel/power/Kconfig" config ARCH_SUSPEND_POSSIBLE - depends on !ARCH_S5P64X0 && !ARCH_S5PC100 + depends on !ARCH_S5PC100 depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \ CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE def_bool y diff --git a/arch/arm/mach-s5p64x0/Kconfig b/arch/arm/mach-s5p64x0/Kconfig index 65c7518..d7f034a 100644 --- a/arch/arm/mach-s5p64x0/Kconfig +++ b/arch/arm/mach-s5p64x0/Kconfig @@ -11,6 +11,8 @@ config CPU_S5P6440 bool select S3C_PL330_DMA select S5P_HRT + select SAMSUNG_SLEEP if PM + select SAMSUNG_WAKEMASK if PM help Enable S5P6440 CPU support @@ -18,6 +20,8 @@ config CPU_S5P6450 bool select S3C_PL330_DMA select S5P_HRT + select SAMSUNG_SLEEP if PM + select SAMSUNG_WAKEMASK if PM help Enable S5P6450 CPU support diff --git a/arch/arm/mach-s5p64x0/Makefile b/arch/arm/mach-s5p64x0/Makefile index 5f6afdf..acfebb7 100644 --- a/arch/arm/mach-s5p64x0/Makefile +++ b/arch/arm/mach-s5p64x0/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_ARCH_S5P64X0) += cpu.o init.o clock.o dma.o gpiolib.o obj-$(CONFIG_ARCH_S5P64X0) += setup-i2c0.o irq-eint.o obj-$(CONFIG_CPU_S5P6440) += clock-s5p6440.o obj-$(CONFIG_CPU_S5P6450) += clock-s5p6450.o +obj-$(CONFIG_PM) += pm.o irq-pm.o # machine support diff --git a/arch/arm/mach-s5p64x0/include/mach/map.h b/arch/arm/mach-s5p64x0/include/mach/map.h index 95c9125..6138f7c 100644 --- a/arch/arm/mach-s5p64x0/include/mach/map.h +++ b/arch/arm/mach-s5p64x0/include/mach/map.h @@ -85,5 +85,6 @@ #define S5P_PA_UART5 S5P6450_PA_UART(5) #define S5P_SZ_UART SZ_256 +#define S3C_VA_UARTx(x) (S3C_VA_UART + ((x) * S3C_UART_OFFSET)) #endif /* __ASM_ARCH_MAP_H */ diff --git a/arch/arm/mach-s5p64x0/include/mach/pm-core.h b/arch/arm/mach-s5p64x0/include/mach/pm-core.h new file mode 100644 index 0000000..aee9d85 --- /dev/null +++ b/arch/arm/mach-s5p64x0/include/mach/pm-core.h @@ -0,0 +1,117 @@ +/* linux/arch/arm/mach-s5p64x0/include/mach/pm-core.h + * + * Copyright (c) 2011 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * S5P64X0 - PM core support for arch/arm/plat-samsung/pm.c + * + * Based on PM core support for S3C64XX by Ben Dooks + * + * 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 <mach/regs-gpio.h> + +static inline void s3c_pm_debug_init_uart(void) +{ + u32 tmp = __raw_readl(S5P64X0_CLK_GATE_PCLK); + + /* + * As a note, since the S5P64X0 UARTs generally have multiple + * clock sources, we simply enable PCLK at the moment and hope + * that the resume settings for the UART are suitable for the + * use with PCLK. + */ + tmp |= S5P64X0_CLKCON_PCLK_UART0; + tmp |= S5P64X0_CLKCON_PCLK_UART1; + tmp |= S5P64X0_CLKCON_PCLK_UART2; + tmp |= S5P64X0_CLKCON_PCLK_UART3; + + __raw_writel(tmp, S5P64X0_CLK_GATE_PCLK); + udelay(10); +} + +static inline void s3c_pm_arch_prepare_irqs(void) +{ + /* VIC should have already been taken care of */ + + /* clear any pending EINT0 interrupts */ + __raw_writel(__raw_readl(S5P64X0_EINT0PEND), S5P64X0_EINT0PEND); +} + +static inline void s3c_pm_arch_stop_clocks(void) { } +static inline void s3c_pm_arch_show_resume_irqs(void) { } + +/* + * make these defines, we currently do not have any need to change + * the IRQ wake controls depending on the CPU we are running on + */ +#define s3c_irqwake_eintallow ((1 << 16) - 1) +#define s3c_irqwake_intallow (~0) + +static inline void s3c_pm_arch_update_uart(void __iomem *regs, + struct pm_uart_save *save) +{ + u32 ucon = __raw_readl(regs + S3C2410_UCON); + u32 ucon_clk = ucon & S3C6400_UCON_CLKMASK; + u32 save_clk = save->ucon & S3C6400_UCON_CLKMASK; + u32 new_ucon; + u32 delta; + + /* + * S5P64X0 UART blocks only support level interrupts, so ensure that + * when we restore unused UART blocks we force the level interrupt + * settings. + */ + save->ucon |= S3C2410_UCON_TXILEVEL | S3C2410_UCON_RXILEVEL; + + /* + * We have a constraint on changing the clock type of the UART + * between UCLKx and PCLK, so ensure that when we restore UCON + * that the CLK field is correctly modified if the bootloader + * has changed anything. + */ + if (ucon_clk != save_clk) { + new_ucon = save->ucon; + delta = ucon_clk ^ save_clk; + + /* + * change from UCLKx => wrong PCLK, + * either UCLK can be tested for by a bit-test + * with UCLK0 + */ + if (ucon_clk & S3C6400_UCON_UCLK0 && + !(save_clk & S3C6400_UCON_UCLK0) && + delta & S3C6400_UCON_PCLK2) { + new_ucon &= ~S3C6400_UCON_UCLK0; + } else if (delta == S3C6400_UCON_PCLK2) { + /* + * as a precaution, don't change from + * PCLK2 => PCLK or vice-versa + */ + new_ucon ^= S3C6400_UCON_PCLK2; + } + + S3C_PMDBG("ucon change %04x => %04x (save=%04x)\n", + ucon, new_ucon, save->ucon); + save->ucon = new_ucon; + } +} + +static inline void s3c_pm_restored_gpios(void) +{ + /* ensure sleep mode has been cleared from the system */ + __raw_writel(0, S5P64X0_SLPEN); +} + +static inline void s3c_pm_saved_gpios(void) +{ + /* + * turn on the sleep mode and keep it there, as it seems that during + * suspend the xCON registers get re-set and thus you can end up with + * problems between going to sleep and resuming. + */ + __raw_writel(S5P64X0_SLPEN_USE_xSLP, S5P64X0_SLPEN); +} diff --git a/arch/arm/mach-s5p64x0/include/mach/regs-clock.h b/arch/arm/mach-s5p64x0/include/mach/regs-clock.h index a133f22..75f66a9 100644 --- a/arch/arm/mach-s5p64x0/include/mach/regs-clock.h +++ b/arch/arm/mach-s5p64x0/include/mach/regs-clock.h @@ -41,17 +41,50 @@ #define S5P6450_DPLL_CON S5P_CLKREG(0x50) #define S5P6450_DPLL_CON_K S5P_CLKREG(0x54) +#define S5P64X0_AHB_CON0 S5P_CLKREG(0x100) #define S5P64X0_CLK_SRC1 S5P_CLKREG(0x10C) #define S5P64X0_SYS_ID S5P_CLKREG(0x118) #define S5P64X0_SYS_OTHERS S5P_CLKREG(0x11C) #define S5P64X0_PWR_CFG S5P_CLKREG(0x804) +#define S5P64X0_EINT_WAKEUP_MASK S5P_CLKREG(0x808) +#define S5P64X0_SLEEP_CFG S5P_CLKREG(0x818) +#define S5P64X0_PWR_STABLE S5P_CLKREG(0x828) + #define S5P64X0_OTHERS S5P_CLKREG(0x900) +#define S5P64X0_WAKEUP_STAT S5P_CLKREG(0x908) + +#define S5P64X0_INFORM0 S5P_CLKREG(0xA00) #define S5P64X0_CLKDIV0_HCLK_SHIFT (8) #define S5P64X0_CLKDIV0_HCLK_MASK (0xF << S5P64X0_CLKDIV0_HCLK_SHIFT) +/* HCLK GATE Registers */ +#define S5P64X0_CLKCON_HCLK1_FIMGVG (1<<2) +#define S5P64X0_CLKCON_SCLK1_FIMGVG (1<<2) + +/* PCLK GATE Registers */ +#define S5P64X0_CLKCON_PCLK_UART3 (1<<4) +#define S5P64X0_CLKCON_PCLK_UART2 (1<<3) +#define S5P64X0_CLKCON_PCLK_UART1 (1<<2) +#define S5P64X0_CLKCON_PCLK_UART0 (1<<1) + +#define S5P64X0_PWRCFG_MMC1_DISABLE (1 << 15) +#define S5P64X0_PWRCFG_MMC0_DISABLE (1 << 14) +#define S5P64X0_PWRCFG_RTC_TICK_DISABLE (1 << 11) +#define S5P64X0_PWRCFG_RTC_ALRM_DISABLE (1 << 10) +#define S5P64X0_PWRCFG_CFG_WFI_MASK (3 << 5) +#define S5P64X0_PWRCFG_CFG_WFI_SLEEP (3 << 5) + +#define S5P64X0_SLEEP_CFG_OSC_EN (1 << 0) + +#define S5P64X0_PWR_STABLE_CNT_VAL_4 (4 << 0) + +#define S5P6450_OTHERS_DISABLE_INT (1 << 31) +#define S5P64X0_OTHERS_RET_UART (1 << 26) +#define S5P64X0_OTHERS_RET_MMC1 (1 << 25) +#define S5P64X0_OTHERS_RET_MMC0 (1 << 24) #define S5P64X0_OTHERS_USB_SIG_MASK (1 << 16) /* Compatibility defines */ diff --git a/arch/arm/mach-s5p64x0/include/mach/regs-gpio.h b/arch/arm/mach-s5p64x0/include/mach/regs-gpio.h index 6ce2547..27a2230 100644 --- a/arch/arm/mach-s5p64x0/include/mach/regs-gpio.h +++ b/arch/arm/mach-s5p64x0/include/mach/regs-gpio.h @@ -34,14 +34,33 @@ #define S5P6450_GPQ_BASE (S5P_VA_GPIO + 0x0180) #define S5P6450_GPS_BASE (S5P_VA_GPIO + 0x0300) +#define S5P64X0_SPCON0 (S5P_VA_GPIO + 0x1A0) +#define S5P64X0_SPCON1 (S5P_VA_GPIO + 0x2B0) + +#define S5P64X0_MEM0CONSLP0 (S5P_VA_GPIO + 0x1C0) +#define S5P64X0_MEM0CONSLP1 (S5P_VA_GPIO + 0x1C4) +#define S5P64X0_MEM0DRVCON (S5P_VA_GPIO + 0x1D0) +#define S5P64X0_MEM1DRVCON (S5P_VA_GPIO + 0x1D4) + +#define S5P64X0_EINT12CON (S5P_VA_GPIO + 0x200) +#define S5P64X0_EINT12FLTCON (S5P_VA_GPIO + 0x220) +#define S5P64X0_EINT12MASK (S5P_VA_GPIO + 0x240) + /* External interrupt control registers for group0 */ #define EINT0CON0_OFFSET (0x900) +#define EINT0FLTCON0_OFFSET (0x910) +#define EINT0FLTCON1_OFFSET (0x914) #define EINT0MASK_OFFSET (0x920) #define EINT0PEND_OFFSET (0x924) #define S5P64X0_EINT0CON0 (S5P_VA_GPIO + EINT0CON0_OFFSET) +#define S5P64X0_EINT0FLTCON0 (S5P_VA_GPIO + EINT0FLTCON0_OFFSET) +#define S5P64X0_EINT0FLTCON1 (S5P_VA_GPIO + EINT0FLTCON1_OFFSET) #define S5P64X0_EINT0MASK (S5P_VA_GPIO + EINT0MASK_OFFSET) #define S5P64X0_EINT0PEND (S5P_VA_GPIO + EINT0PEND_OFFSET) +#define S5P64X0_SLPEN (S5P_VA_GPIO + 0x930) +#define S5P64X0_SLPEN_USE_xSLP (1 << 0) + #endif /* __ASM_ARCH_REGS_GPIO_H */ diff --git a/arch/arm/mach-s5p64x0/irq-eint.c b/arch/arm/mach-s5p64x0/irq-eint.c index fe7380f..3b94c6c 100644 --- a/arch/arm/mach-s5p64x0/irq-eint.c +++ b/arch/arm/mach-s5p64x0/irq-eint.c @@ -19,6 +19,7 @@ #include <plat/regs-irqtype.h> #include <plat/gpio-cfg.h> +#include <plat/pm.h> #include <mach/regs-gpio.h> #include <mach/regs-clock.h> @@ -133,6 +134,7 @@ static int s5p64x0_alloc_gc(void) ct->chip.irq_mask = irq_gc_mask_set_bit; ct->chip.irq_unmask = irq_gc_mask_clr_bit; ct->chip.irq_set_type = s5p64x0_irq_eint_set_type; + ct->chip.irq_set_wake = s3c_irqext_wake; ct->regs.ack = EINT0PEND_OFFSET; ct->regs.mask = EINT0MASK_OFFSET; irq_setup_generic_chip(gc, IRQ_MSK(16), IRQ_GC_INIT_MASK_CACHE, diff --git a/arch/arm/mach-s5p64x0/irq-pm.c b/arch/arm/mach-s5p64x0/irq-pm.c new file mode 100644 index 0000000..3e6f245 --- /dev/null +++ b/arch/arm/mach-s5p64x0/irq-pm.c @@ -0,0 +1,92 @@ +/* linux/arch/arm/mach-s5p64x0/irq-pm.c + * + * Copyright (c) 2011 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * S5P64X0 - Interrupt handling Power Management + * + * Based on arch/arm/mach-s3c64xx/irq-pm.c by Ben Dooks + * + * 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/syscore_ops.h> +#include <linux/serial_core.h> +#include <linux/io.h> + +#include <plat/regs-serial.h> +#include <plat/pm.h> + +#include <mach/regs-gpio.h> + +static struct sleep_save irq_save[] = { + SAVE_ITEM(S5P64X0_EINT0CON0), + SAVE_ITEM(S5P64X0_EINT0FLTCON0), + SAVE_ITEM(S5P64X0_EINT0FLTCON1), + SAVE_ITEM(S5P64X0_EINT0MASK), +}; + +static struct irq_grp_save { + u32 con; + u32 fltcon; + u32 mask; +} eint_grp_save[4]; + +static u32 irq_uart_mask[CONFIG_SERIAL_SAMSUNG_UARTS]; + +static int s5p64x0_irq_pm_suspend(void) +{ + struct irq_grp_save *grp = eint_grp_save; + int i; + + S3C_PMDBG("%s: suspending IRQs\n", __func__); + + s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save)); + + for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++) + irq_uart_mask[i] = __raw_readl(S3C_VA_UARTx(i) + S3C64XX_UINTM); + + for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) { + grp->con = __raw_readl(S5P64X0_EINT12CON + (i * 4)); + grp->mask = __raw_readl(S5P64X0_EINT12MASK + (i * 4)); + grp->fltcon = __raw_readl(S5P64X0_EINT12FLTCON + (i * 4)); + } + + return 0; +} + +static void s5p64x0_irq_pm_resume(void) +{ + struct irq_grp_save *grp = eint_grp_save; + int i; + + S3C_PMDBG("%s: resuming IRQs\n", __func__); + + s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save)); + + for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++) + __raw_writel(irq_uart_mask[i], S3C_VA_UARTx(i) + S3C64XX_UINTM); + + for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) { + __raw_writel(grp->con, S5P64X0_EINT12CON + (i * 4)); + __raw_writel(grp->mask, S5P64X0_EINT12MASK + (i * 4)); + __raw_writel(grp->fltcon, S5P64X0_EINT12FLTCON + (i * 4)); + } + + S3C_PMDBG("%s: IRQ configuration restored\n", __func__); +} + +static struct syscore_ops s5p64x0_irq_syscore_ops = { + .suspend = s5p64x0_irq_pm_suspend, + .resume = s5p64x0_irq_pm_resume, +}; + +static int __init s5p64x0_syscore_init(void) +{ + register_syscore_ops(&s5p64x0_irq_syscore_ops); + + return 0; +} +core_initcall(s5p64x0_syscore_init); diff --git a/arch/arm/mach-s5p64x0/pm.c b/arch/arm/mach-s5p64x0/pm.c new file mode 100644 index 0000000..cced4fb --- /dev/null +++ b/arch/arm/mach-s5p64x0/pm.c @@ -0,0 +1,204 @@ +/* linux/arch/arm/mach-s5p64x0/pm.c + * + * Copyright (c) 2011 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * S5P64X0 Power Management Support + * + * Based on arch/arm/mach-s3c64xx/pm.c by Ben Dooks + * + * 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/suspend.h> +#include <linux/syscore_ops.h> +#include <linux/io.h> + +#include <plat/cpu.h> +#include <plat/pm.h> +#include <plat/regs-timer.h> +#include <plat/wakeup-mask.h> + +#include <mach/regs-clock.h> +#include <mach/regs-gpio.h> + +static struct sleep_save s5p64x0_core_save[] = { + SAVE_ITEM(S5P64X0_APLL_CON), + SAVE_ITEM(S5P64X0_MPLL_CON), + SAVE_ITEM(S5P64X0_EPLL_CON), + SAVE_ITEM(S5P64X0_EPLL_CON_K), + SAVE_ITEM(S5P64X0_CLK_SRC0), + SAVE_ITEM(S5P64X0_CLK_SRC1), + SAVE_ITEM(S5P64X0_CLK_DIV0), + SAVE_ITEM(S5P64X0_CLK_DIV1), + SAVE_ITEM(S5P64X0_CLK_DIV2), + SAVE_ITEM(S5P64X0_CLK_DIV3), + SAVE_ITEM(S5P64X0_CLK_GATE_MEM0), + SAVE_ITEM(S5P64X0_CLK_GATE_HCLK1), + SAVE_ITEM(S5P64X0_CLK_GATE_SCLK1), +}; + +static struct sleep_save s5p64x0_misc_save[] = { + SAVE_ITEM(S5P64X0_AHB_CON0), + SAVE_ITEM(S5P64X0_SPCON0), + SAVE_ITEM(S5P64X0_SPCON1), + SAVE_ITEM(S5P64X0_MEM0CONSLP0), + SAVE_ITEM(S5P64X0_MEM0CONSLP1), + SAVE_ITEM(S5P64X0_MEM0DRVCON), + SAVE_ITEM(S5P64X0_MEM1DRVCON), + + SAVE_ITEM(S3C64XX_TINT_CSTAT), +}; + +/* DPLL is present only in S5P6450 */ +static struct sleep_save s5p6450_core_save[] = { + SAVE_ITEM(S5P6450_DPLL_CON), + SAVE_ITEM(S5P6450_DPLL_CON_K), +}; + +void s3c_pm_configure_extint(void) +{ + __raw_writel(s3c_irqwake_eintmask, S5P64X0_EINT_WAKEUP_MASK); +} + +void s3c_pm_restore_core(void) +{ + __raw_writel(0, S5P64X0_EINT_WAKEUP_MASK); + + s3c_pm_do_restore_core(s5p64x0_core_save, + ARRAY_SIZE(s5p64x0_core_save)); + + if ((__raw_readl(S5P64X0_SYS_ID) & 0xFF000) == 0x50000) + s3c_pm_do_restore_core(s5p6450_core_save, + ARRAY_SIZE(s5p6450_core_save)); + + s3c_pm_do_restore(s5p64x0_misc_save, ARRAY_SIZE(s5p64x0_misc_save)); +} + +void s3c_pm_save_core(void) +{ + s3c_pm_do_save(s5p64x0_misc_save, ARRAY_SIZE(s5p64x0_misc_save)); + + if ((__raw_readl(S5P64X0_SYS_ID) & 0xFF000) == 0x50000) + s3c_pm_do_save(s5p6450_core_save, + ARRAY_SIZE(s5p6450_core_save)); + + s3c_pm_do_save(s5p64x0_core_save, ARRAY_SIZE(s5p64x0_core_save)); +} + +static int s5p64x0_cpu_suspend(unsigned long arg) +{ + unsigned long tmp = 0; + + /* + * Issue the standby signal into the pm unit. Note, we + * issue a write-buffer drain just in case. + */ + 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" + "mcr p15, 0, %0, c7, c0, 4" : : "r" (tmp)); + + /* we should never get past here */ + panic("sleep resumed to originator?"); +} + +/* mapping of interrupts to parts of the wakeup mask */ +static struct samsung_wakeup_mask s5p64x0_wake_irqs[] = { + { .irq = IRQ_RTC_ALARM, .bit = S5P64X0_PWRCFG_RTC_ALRM_DISABLE, }, + { .irq = IRQ_RTC_TIC, .bit = S5P64X0_PWRCFG_RTC_TICK_DISABLE, }, + { .irq = IRQ_HSMMC0, .bit = S5P64X0_PWRCFG_MMC0_DISABLE, }, + { .irq = IRQ_HSMMC1, .bit = S5P64X0_PWRCFG_MMC1_DISABLE, }, +}; + +static void s5p64x0_pm_prepare(void) +{ + u32 tmp; + + samsung_sync_wakemask(S5P64X0_PWR_CFG, + s5p64x0_wake_irqs, ARRAY_SIZE(s5p64x0_wake_irqs)); + + /* store the resume address in INFORM0 register */ + __raw_writel(virt_to_phys(s3c_cpu_resume), S5P64X0_INFORM0); + + /* setup clock gating for FIMGVG block */ + __raw_writel((__raw_readl(S5P64X0_CLK_GATE_HCLK1) | \ + (S5P64X0_CLKCON_HCLK1_FIMGVG)), S5P64X0_CLK_GATE_HCLK1); + __raw_writel((__raw_readl(S5P64X0_CLK_GATE_SCLK1) | \ + (S5P64X0_CLKCON_SCLK1_FIMGVG)), S5P64X0_CLK_GATE_SCLK1); + + /* Configure the stabilization counter with wait time required */ + __raw_writel(S5P64X0_PWR_STABLE_CNT_VAL_4, S5P64X0_PWR_STABLE); + + /* set WFI to SLEEP mode configuration */ + tmp = __raw_readl(S5P64X0_SLEEP_CFG); + tmp &= ~(S5P64X0_SLEEP_CFG_OSC_EN); + __raw_writel(tmp, S5P64X0_SLEEP_CFG); + + tmp = __raw_readl(S5P64X0_PWR_CFG); + tmp &= ~(S5P64X0_PWRCFG_CFG_WFI_MASK); + tmp |= S5P64X0_PWRCFG_CFG_WFI_SLEEP; + __raw_writel(tmp, S5P64X0_PWR_CFG); + + /* + * set OTHERS register to disable interrupt before going to + * sleep. This bit is present only in S5P6450, it is reserved + * in S5P6440. + */ + if ((__raw_readl(S5P64X0_SYS_ID) & 0xFF000) == 0x50000) { + tmp = __raw_readl(S5P64X0_OTHERS); + tmp |= S5P6450_OTHERS_DISABLE_INT; + __raw_writel(tmp, S5P64X0_OTHERS); + } + + /* ensure previous wakeup state is cleared before sleeping */ + __raw_writel(__raw_readl(S5P64X0_WAKEUP_STAT), S5P64X0_WAKEUP_STAT); + +} + +static int s5p64x0_pm_add(struct sys_device *sysdev) +{ + pm_cpu_prep = s5p64x0_pm_prepare; + pm_cpu_sleep = s5p64x0_cpu_suspend; + pm_uart_udivslot = 1; + + return 0; +} + +static struct sysdev_driver s5p64x0_pm_driver = { + .add = s5p64x0_pm_add, +}; + +static __init int s5p64x0_pm_drvinit(void) +{ + s3c_pm_init(); + + return sysdev_driver_register(&s5p64x0_sysclass, &s5p64x0_pm_driver); +} +arch_initcall(s5p64x0_pm_drvinit); + +static void s5p64x0_pm_resume(void) +{ + u32 tmp; + + tmp = __raw_readl(S5P64X0_OTHERS); + tmp |= (S5P64X0_OTHERS_RET_MMC0 | S5P64X0_OTHERS_RET_MMC1 | \ + S5P64X0_OTHERS_RET_UART); + __raw_writel(tmp , S5P64X0_OTHERS); +} + +static struct syscore_ops s5p64x0_pm_syscore_ops = { + .resume = s5p64x0_pm_resume, +}; + +static __init int s5p64x0_pm_syscore_init(void) +{ + register_syscore_ops(&s5p64x0_pm_syscore_ops); + + return 0; +} +arch_initcall(s5p64x0_pm_syscore_init); -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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