diff mbox

[v8,1/4] ARM: rockchip: add suspend and resume for RK3288

Message ID 1416051910-16730-2-git-send-email-zyw@rock-chips.com (mailing list archive)
State New, archived
Headers show

Commit Message

Chris Zhong Nov. 15, 2014, 11:45 a.m. UTC 
It's a basic version of suspend and resume for rockchip,
it only support RK3288 now.

Signed-off-by: Tony Xie <xxx@rock-chips.com>
Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Tested-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Doug Anderson <dianders@chromium.org>

---

Changes in v8:
- use enum for define sleep mode
- move rk3288_config_bootdata to the front of sram memcpy

Changes in v7:
- get rid all of unused code

Changes in v6:
- get rid of the save/restore of SRAM
- doing the copy of resume code once at init time
- remove ROCKCHIP_ARM_OFF_LOGIC_DEEP from rk3288_fill_in_bootram
- add of_platform_populate in rockchip_dt_init

Changes in v5:
- use rk3288_bootram_sz for memcpy size
- fixed error of sram save and restore

Changes in v4:
- remove grf regmap

Changes in v3:
- move the pinmux of gpio6_c6 save and restore to pinctrl-rockchip

Changes in v2:
- add the regulator calls in prepare and finish.
- add the pinmux of gpio6_c6 save and restore

 arch/arm/mach-rockchip/Makefile   |   1 +
 arch/arm/mach-rockchip/pm.c       | 264 ++++++++++++++++++++++++++++++++++++++
 arch/arm/mach-rockchip/pm.h       |  99 ++++++++++++++
 arch/arm/mach-rockchip/rockchip.c |   2 +
 arch/arm/mach-rockchip/sleep.S    |  73 +++++++++++
 5 files changed, 439 insertions(+)
 create mode 100644 arch/arm/mach-rockchip/pm.c
 create mode 100644 arch/arm/mach-rockchip/pm.h
 create mode 100644 arch/arm/mach-rockchip/sleep.S

Comments

Heiko Stübner Nov. 24, 2014, 11:20 p.m. UTC | #1 
Hi Chris,

Am Samstag, 15. November 2014, 19:45:07 schrieb Chris Zhong:
> It's a basic version of suspend and resume for rockchip,
> it only support RK3288 now.

please fold in both in the two patches from Doug
https://chromium-review.googlesource.com/#/c/231181/
https://chromium-review.googlesource.com/#/c/231182/

as they make the code nicer to read :-)


But overall, this looks quite nice now. I've found some small nits inside - 
some of them are already also addressed by Dougs patches.


> Signed-off-by: Tony Xie <xxx@rock-chips.com>
> Signed-off-by: Chris Zhong <zyw@rock-chips.com>
> Tested-by: Doug Anderson <dianders@chromium.org>
> Reviewed-by: Doug Anderson <dianders@chromium.org>
> 
> ---

[...]

> diff --git a/arch/arm/mach-rockchip/pm.c b/arch/arm/mach-rockchip/pm.c
> new file mode 100644
> index 0000000..e059b84
> --- /dev/null
> +++ b/arch/arm/mach-rockchip/pm.c
> @@ -0,0 +1,264 @@
> +/*
> + * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
> + * Author: Tony Xie <tony.xie@rock-chips.com>
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
> for + * more details.
> + *
> + */
> +
> +#include <linux/init.h>
> +#include <linux/io.h>
> +#include <linux/kernel.h>
> +#include <linux/of.h>
> +#include <linux/of_address.h>
> +#include <linux/regmap.h>
> +#include <linux/suspend.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/regulator/machine.h>
> +
> +#include <asm/cacheflush.h>
> +#include <asm/tlbflush.h>
> +#include <asm/suspend.h>
> +
> +#include "pm.h"
> +
> +/* These enum are option of low power mode */
> +enum {
> +	ROCKCHIP_ARM_OFF_LOGIC_NORMAL = 0,
> +	ROCKCHIP_ARM_OFF_LOGIC_DEEP = 1,
> +};
> +
> +struct rockchip_pm_device_id {
> +	const char *compatible;
> +	const struct platform_suspend_ops *ops;
> +	int (*init)(void);
> +};
> +
> +static void __iomem *rk3288_bootram_base;
> +static phys_addr_t rk3288_bootram_phy;
> +
> +static struct regmap *pmu_regmap;
> +static struct regmap *sgrf_regmap;
> +
> +static u32 rk3288_pmu_pwr_mode_con;
> +static u32 rk3288_sgrf_soc_con0;
> +
> +static inline u32 rk3288_l2_config(void)
> +{
> +	u32 l2ctlr;
> +
> +	asm("mrc p15, 1, %0, c9, c0, 2" : "=r" (l2ctlr));
> +	return l2ctlr;
> +}
> +
> +static void rk3288_config_bootdata(void)
> +{
> +	rkpm_bootdata_cpusp = rk3288_bootram_phy + (SZ_4K - 8);
> +	rkpm_bootdata_cpu_code = virt_to_phys(cpu_resume);
> +
> +	rkpm_bootdata_l2ctlr_f  = 1;
> +	rkpm_bootdata_l2ctlr = rk3288_l2_config();
> +}
> +
> +static void rk3288_slp_mode_set(int level)
> +{
> +	u32 mode_set, mode_set1;
> +
> +	regmap_read(sgrf_regmap, RK3288_SGRF_SOC_CON0, &rk3288_sgrf_soc_con0);
> +
> +	regmap_read(pmu_regmap, RK3288_PMU_PWRMODE_CON,
> +		    &rk3288_pmu_pwr_mode_con);
> +
> +	/* set bit 8 so that system will resume to FAST_BOOT_ADDR */
> +	regmap_write(sgrf_regmap, RK3288_SGRF_SOC_CON0,
> +		     SGRF_FAST_BOOT_EN | SGRF_FAST_BOOT_EN_WRITE);
> +
> +	/* booting address of resuming system is from this register value */
> +	regmap_write(sgrf_regmap, RK3288_SGRF_FAST_BOOT_ADDR,
> +		     rk3288_bootram_phy);
> +
> +	regmap_write(pmu_regmap, RK3288_PMU_WAKEUP_CFG1,
> +		     PMU_ARMINT_WAKEUP_EN);
> +
> +	mode_set = BIT(PMU_GLOBAL_INT_DISABLE) | BIT(PMU_L2FLUSH_EN) |
> +		   BIT(PMU_SREF0_ENTER_EN) | BIT(PMU_SREF1_ENTER_EN) |
> +		   BIT(PMU_DDR0_GATING_EN) | BIT(PMU_DDR1_GATING_EN) |
> +		   BIT(PMU_PWR_MODE_EN) | BIT(PMU_CHIP_PD_EN) |
> +		   BIT(PMU_SCU_EN);
> +
> +	mode_set1 = BIT(PMU_CLR_CORE) | BIT(PMU_CLR_CPUP);
> +
> +	if (level == ROCKCHIP_ARM_OFF_LOGIC_DEEP) {
> +		/* arm off, logic deep sleep */
> +		mode_set |= BIT(PMU_BUS_PD_EN) |
> +			    BIT(PMU_DDR1IO_RET_EN) | BIT(PMU_DDR0IO_RET_EN) |
> +			    BIT(PMU_OSC_24M_DIS) | BIT(PMU_PMU_USE_LF) |
> +			    BIT(PMU_ALIVE_USE_LF) | BIT(PMU_PLL_PD_EN);
> +
> +		mode_set1 |= BIT(PMU_CLR_ALIVE) | BIT(PMU_CLR_BUS) |
> +			     BIT(PMU_CLR_PERI) | BIT(PMU_CLR_DMA);
> +	} else {
> +		/*
> +		 * arm off, logic normal
> +		 * if pmu_clk_core_src_gate_en is not set,
> +		 * wakeup will be error
> +		 */
> +		mode_set |= BIT(PMU_CLK_CORE_SRC_GATE_EN);
> +	}
> +
> +	regmap_write(pmu_regmap, RK3288_PMU_PWRMODE_CON, mode_set);
> +	regmap_write(pmu_regmap, RK3288_PMU_PWRMODE_CON1, mode_set1);
> +}
> +
> +static void rk3288_slp_mode_set_resume(void)
> +{
> +	regmap_write(pmu_regmap, RK3288_PMU_PWRMODE_CON,
> +		     rk3288_pmu_pwr_mode_con);
> +
> +	regmap_write(sgrf_regmap, RK3288_SGRF_SOC_CON0,
> +		     rk3288_sgrf_soc_con0 | SGRF_FAST_BOOT_EN_WRITE);
> +}
> +
> +static int rockchip_lpmode_enter(unsigned long arg)
> +{
> +	flush_cache_all();
> +
> +	cpu_do_idle();
> +
> +	pr_info("Failed to suspend the system\n");

I guess this should be a pr_err. Also could you try for a format like
	pr_err("%s: Failed to suspend\n", __func__);

This way it at least gives an indication where is failed ... often this 
shortens the time spent searching for the place of origin :-)

> +
> +	return 1;
> +}
> +
> +static int rk3288_suspend_enter(suspend_state_t state)
> +{
> +	local_fiq_disable();
> +
> +	rk3288_slp_mode_set(ROCKCHIP_ARM_OFF_LOGIC_NORMAL);
> +
> +	cpu_suspend(0, rockchip_lpmode_enter);
> +
> +	rk3288_slp_mode_set_resume();
> +
> +	local_fiq_enable();
> +
> +	return 0;
> +}
> +
> +static int rk3288_suspend_prepare(void)
> +{
> +	return regulator_suspend_prepare(PM_SUSPEND_MEM);
> +}
> +
> +static void rk3288_suspend_finish(void)
> +{
> +	if (regulator_suspend_finish())
> +		pr_warn("suspend finish failed\n");

pr_err and the format containing the function name

> +}
> +
> +static int rk3288_suspend_iomap(void)
> +{
> +	struct device_node *node;
> +	struct resource res;
> +
> +	node = of_find_compatible_node(NULL, NULL, "rockchip,rk3288-pmu-sram");
> +	if (!node) {
> +		pr_err("%s: could not find bootram dt node\n", __func__);
> +		return -1;

	return -ENODEV;

> +	}
> +
> +	rk3288_bootram_base = of_iomap(node, 0);
> +	if (!rk3288_bootram_base) {
> +		pr_err("%s: could not map bootram base\n", __func__);
> +		return -1;

	return -ENOMEM;

> +	}
> +
> +	if (of_address_to_resource(node, 0, &res)) {
> +		pr_err("%s: could not get bootram phy addr\n", __func__);
> +		return -1;
> +	}

ret = of_address_to_resource(node, 0, &res)
if (ret) {
	pr_err("%s: could not get bootram phy addr\n", __func__);
	return ret;
}


> +
> +	rk3288_bootram_phy = res.start;
> +
> +	rk3288_config_bootdata();
> +
> +	/* copy resume code and data to bootsram */
> +	memcpy(rk3288_bootram_base, rockchip_slp_cpu_resume,
> +	       rk3288_bootram_sz);
> +
> +	return 0;
> +}
> +
> +static int rk3288_suspend_init(void)
> +{
> +	int ret;
> +
> +	pmu_regmap = syscon_regmap_lookup_by_compatible(
> +				"rockchip,rk3288-pmu");
> +
> +	if (IS_ERR(pmu_regmap)) {
> +		pr_err("%s: could not find pmu regmap\n", __func__);
> +		return -1;

	return PTR_ERR(pmu_regmap);


> +	}
> +
> +	sgrf_regmap = syscon_regmap_lookup_by_compatible(
> +				"rockchip,rk3288-sgrf");
> +
> +	if (IS_ERR(sgrf_regmap)) {
> +		pr_err("%s: could not find sgrf regmap\n", __func__);
> +		return -1;

	return PTR_ERR(sgrf_regmap);


> +	}
> +
> +	ret = rk3288_suspend_iomap();
> +
> +	return ret;
> +}
> +
> +static const struct platform_suspend_ops rk3288_suspend_ops = {
> +	.enter   = rk3288_suspend_enter,
> +	.valid   = suspend_valid_only_mem,
> +	.prepare = rk3288_suspend_prepare,
> +	.finish  = rk3288_suspend_finish,
> +};
> +
> +static const struct rockchip_pm_device_id rockchip_pm_dt_match[]
> __initconst = { +	{
> +		.compatible = "rockchip,rk3288",
> +		.ops = &rk3288_suspend_ops,
> +		.init = rk3288_suspend_init,
> +	},
> +	{ /* sentinel */ },
> +};
> +
> +void __init rockchip_suspend_init(void)
> +{
> +	const struct rockchip_pm_device_id *matches =
> +		rockchip_pm_dt_match;
> +
> +	while (matches->compatible && matches->ops) {
> +		if (of_machine_is_compatible(matches->compatible))
> +			break;
> +		matches++;
> +	}
> +
> +	if (!matches->compatible || !matches->ops) {
> +		pr_err("%s:there is not a machine matched\n", __func__);
> +		return;
> +	}
> +
> +	if (matches->init) {
> +		if (matches->init()) {
> +			pr_err("%s: matches init error\n", __func__);
> +			return;
> +		}
> +	}
> +
> +	suspend_set_ops(matches->ops);
> +}
> diff --git a/arch/arm/mach-rockchip/pm.h b/arch/arm/mach-rockchip/pm.h
> new file mode 100644
> index 0000000..99722d0
> --- /dev/null
> +++ b/arch/arm/mach-rockchip/pm.h
> @@ -0,0 +1,99 @@
> +/*
> + * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
> + * Author: Tony Xie <tony.xie@rock-chips.com>
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
> for + * more details.
> + */
> +
> +#ifndef __MACH_ROCKCHIP_PM_H
> +#define __MACH_ROCKCHIP_PM_H
> +
> +extern unsigned long rkpm_bootdata_cpusp;
> +extern unsigned long rkpm_bootdata_cpu_code;
> +extern unsigned long rkpm_bootdata_l2ctlr_f;
> +extern unsigned long rkpm_bootdata_l2ctlr;
> +extern unsigned long rkpm_bootdata_ddr_code;
> +extern unsigned long rkpm_bootdata_ddr_data;
> +extern unsigned long rk3288_bootram_sz;
> +
> +void rockchip_slp_cpu_resume(void);
> +void __init rockchip_suspend_init(void);
> +
> +/****** following is rk3288 defined **********/
> +#define RK3288_PMU_WAKEUP_CFG0          0x00
> +#define RK3288_PMU_WAKEUP_CFG1          0x04
> +#define RK3288_PMU_PWRMODE_CON          0x18
> +#define RK3288_PMU_OSC_CNT              0x20
> +#define RK3288_PMU_PLL_CNT              0x24
> +#define RK3288_PMU_STABL_CNT            0x28
> +#define RK3288_PMU_DDR0IO_PWRON_CNT     0x2c
> +#define RK3288_PMU_DDR1IO_PWRON_CNT     0x30
> +#define RK3288_PMU_CORE_PWRDWN_CNT      0x34
> +#define RK3288_PMU_CORE_PWRUP_CNT       0x38
> +#define RK3288_PMU_GPU_PWRDWN_CNT       0x3c
> +#define RK3288_PMU_GPU_PWRUP_CNT        0x40
> +#define RK3288_PMU_WAKEUP_RST_CLR_CNT   0x44
> +#define RK3288_PMU_PWRMODE_CON1         0x90
> +
> +#define RK3288_SGRF_SOC_CON0            (0x0000)
> +#define RK3288_SGRF_FAST_BOOT_ADDR      (0x0120)
> +#define SGRF_FAST_BOOT_EN		BIT(8)
> +#define SGRF_FAST_BOOT_EN_WRITE		BIT(24)
> +
> +#define RK3288_CRU_MODE_CON (0x50)
> +#define RK3288_CRU_SEL0_CON (0x60)
> +#define RK3288_CRU_SEL1_CON (0x64)
> +#define RK3288_CRU_SEL10_CON (0x88)
> +#define RK3288_CRU_SEL33_CON (0xe4)
> +#define RK3288_CRU_SEL37_CON (0xf4)
> +
> +/* PMU_WAKEUP_CFG1 bits */
> +#define PMU_ARMINT_WAKEUP_EN BIT(0)
> +
> +enum rk3288_pwr_mode_con {
> +	PMU_PWR_MODE_EN = 0,
> +	PMU_CLK_CORE_SRC_GATE_EN,
> +	PMU_GLOBAL_INT_DISABLE,
> +	PMU_L2FLUSH_EN,
> +	PMU_BUS_PD_EN,
> +	PMU_A12_0_PD_EN,
> +	PMU_SCU_EN,
> +	PMU_PLL_PD_EN,
> +	PMU_CHIP_PD_EN, /* POWER OFF PIN ENABLE */
> +	PMU_PWROFF_COMB,
> +	PMU_ALIVE_USE_LF,
> +	PMU_PMU_USE_LF,
> +	PMU_OSC_24M_DIS,
> +	PMU_INPUT_CLAMP_EN,
> +	PMU_WAKEUP_RESET_EN,
> +	PMU_SREF0_ENTER_EN,
> +	PMU_SREF1_ENTER_EN,
> +	PMU_DDR0IO_RET_EN,
> +	PMU_DDR1IO_RET_EN,
> +	PMU_DDR0_GATING_EN,
> +	PMU_DDR1_GATING_EN,
> +	PMU_DDR0IO_RET_DE_REQ,
> +	PMU_DDR1IO_RET_DE_REQ
> +};
> +
> +enum rk3288_pwr_mode_con1 {
> +	PMU_CLR_BUS = 0,
> +	PMU_CLR_CORE,
> +	PMU_CLR_CPUP,
> +	PMU_CLR_ALIVE,
> +	PMU_CLR_DMA,
> +	PMU_CLR_PERI,
> +	PMU_CLR_GPU,
> +	PMU_CLR_VIDEO,
> +	PMU_CLR_HEVC,
> +	PMU_CLR_VIO,
> +};
> +
> +#endif /* __MACH_ROCKCHIP_PM_H */
> diff --git a/arch/arm/mach-rockchip/rockchip.c
> b/arch/arm/mach-rockchip/rockchip.c index d226b71..2b68a1a 100644
> --- a/arch/arm/mach-rockchip/rockchip.c
> +++ b/arch/arm/mach-rockchip/rockchip.c
> @@ -23,9 +23,11 @@
>  #include <asm/mach/map.h>
>  #include <asm/hardware/cache-l2x0.h>
>  #include "core.h"
> +#include "pm.h"
> 
>  static void __init rockchip_dt_init(void)
>  {
> +	rockchip_suspend_init();
>  	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
>  	platform_device_register_simple("cpufreq-dt", 0, NULL, 0);
>  }
> diff --git a/arch/arm/mach-rockchip/sleep.S b/arch/arm/mach-rockchip/sleep.S
> new file mode 100644
> index 0000000..2eec9a3
> --- /dev/null
> +++ b/arch/arm/mach-rockchip/sleep.S
> @@ -0,0 +1,73 @@
> +/*
> + * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
> + * Author: Tony Xie <tony.xie@rock-chips.com>
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
> for + * more details.
> + *
> + */
> +
> +#include <linux/linkage.h>
> +#include <asm/assembler.h>
> +#include <asm/memory.h>
> +
> +.data
> +/*
> + * this code will be copied from
> + * ddr to sram for system resumeing.
> + * so it is ".data section".
> + */
> +.align
> +
> +ENTRY(rockchip_slp_cpu_resume)
> +	setmode	PSR_I_BIT | PSR_F_BIT | SVC_MODE, r1  @ set svc, irqs off
> +	mrc	p15, 0, r1, c0, c0, 5
> +	and	r1, r1, #0xf
> +	cmp	r1, #0
> +	/* olny cpu0 can continue to run, the others is halt here */
> +	beq	cpu0run
> +secondary_loop:
> +	wfe
> +	b	secondary_loop
> +cpu0run:
> +	ldr	r3, rkpm_bootdata_l2ctlr_f
> +	cmp	r3, #0
> +	beq	sp_set
> +	ldr	r3, rkpm_bootdata_l2ctlr
> +	mcr	p15, 1, r3, c9, c0, 2
> +sp_set:
> +	ldr	sp, rkpm_bootdata_cpusp
> +	ldr	r1, rkpm_bootdata_cpu_code
> +	bx	r1
> +ENDPROC(rockchip_slp_cpu_resume)
> +
> +/* Parameters filled in by the kernel */
> +
> +/* Flag for whether to restore L2CTLR on resume */
> +	.global rkpm_bootdata_l2ctlr_f
> +rkpm_bootdata_l2ctlr_f:
> +	.long 0
> +
> +/* Saved L2CTLR to restore on resume */
> +	.global rkpm_bootdata_l2ctlr
> +rkpm_bootdata_l2ctlr:
> +	.long 0
> +
> +/* CPU resume SP addr */
> +	.globl rkpm_bootdata_cpusp
> +rkpm_bootdata_cpusp:
> +	.long 0
> +
> +/* CPU resume function (physical address) */
> +	.globl rkpm_bootdata_cpu_code
> +rkpm_bootdata_cpu_code:
> +	.long 0
> +
> +ENTRY(rk3288_bootram_sz)
> +        .word   . - rockchip_slp_cpu_resume
Chris Zhong Nov. 25, 2014, 3:59 a.m. UTC | #2 
On 11/25/2014 07:20 AM, Heiko Stübner wrote:
> Hi Chris,
>
> Am Samstag, 15. November 2014, 19:45:07 schrieb Chris Zhong:
>> It's a basic version of suspend and resume for rockchip,
>> it only support RK3288 now.
> please fold in both in the two patches from Doug
> https://chromium-review.googlesource.com/#/c/231181/
> https://chromium-review.googlesource.com/#/c/231182/
>
> as they make the code nicer to read :-)
>
>
> But overall, this looks quite nice now. I've found some small nits inside -
> some of them are already also addressed by Dougs patches.
OK, I will merge Doug's patch to v9.
>
>> Signed-off-by: Tony Xie<xxx@rock-chips.com>
>> Signed-off-by: Chris Zhong<zyw@rock-chips.com>
>> Tested-by: Doug Anderson<dianders@chromium.org>
>> Reviewed-by: Doug Anderson<dianders@chromium.org>
>>
>> ---
> [...]
>
>> diff --git a/arch/arm/mach-rockchip/pm.c b/arch/arm/mach-rockchip/pm.c
>> new file mode 100644
>> index 0000000..e059b84
>> --- /dev/null
>> +++ b/arch/arm/mach-rockchip/pm.c
>> @@ -0,0 +1,264 @@
>> +/*
>> + * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
>> + * Author: Tony Xie<tony.xie@rock-chips.com>
>> + *
>> + * This program is free software; you can redistribute it and/or modify it
>> + * under the terms and conditions of the GNU General Public License,
>> + * version 2, as published by the Free Software Foundation.
>> + *
>> + * This program is distributed in the hope it will be useful, but WITHOUT
>> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
>> + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
>> for + * more details.
>> + *
>> + */
>> +
>> +#include <linux/init.h>
>> +#include <linux/io.h>
>> +#include <linux/kernel.h>
>> +#include <linux/of.h>
>> +#include <linux/of_address.h>
>> +#include <linux/regmap.h>
>> +#include <linux/suspend.h>
>> +#include <linux/mfd/syscon.h>
>> +#include <linux/regulator/machine.h>
>> +
>> +#include <asm/cacheflush.h>
>> +#include <asm/tlbflush.h>
>> +#include <asm/suspend.h>
>> +
>> +#include "pm.h"
>> +
>> +/* These enum are option of low power mode */
>> +enum {
>> +	ROCKCHIP_ARM_OFF_LOGIC_NORMAL = 0,
>> +	ROCKCHIP_ARM_OFF_LOGIC_DEEP = 1,
>> +};
>> +
>> +struct rockchip_pm_device_id {
>> +	const char *compatible;
>> +	const struct platform_suspend_ops *ops;
>> +	int (*init)(void);
>> +};
>> +
>> +static void __iomem *rk3288_bootram_base;
>> +static phys_addr_t rk3288_bootram_phy;
>> +
>> +static struct regmap *pmu_regmap;
>> +static struct regmap *sgrf_regmap;
>> +
>> +static u32 rk3288_pmu_pwr_mode_con;
>> +static u32 rk3288_sgrf_soc_con0;
>> +
>> +static inline u32 rk3288_l2_config(void)
>> +{
>> +	u32 l2ctlr;
>> +
>> +	asm("mrc p15, 1, %0, c9, c0, 2" : "=r" (l2ctlr));
>> +	return l2ctlr;
>> +}
>> +
>> +static void rk3288_config_bootdata(void)
>> +{
>> +	rkpm_bootdata_cpusp = rk3288_bootram_phy + (SZ_4K - 8);
>> +	rkpm_bootdata_cpu_code = virt_to_phys(cpu_resume);
>> +
>> +	rkpm_bootdata_l2ctlr_f  = 1;
>> +	rkpm_bootdata_l2ctlr = rk3288_l2_config();
>> +}
>> +
>> +static void rk3288_slp_mode_set(int level)
>> +{
>> +	u32 mode_set, mode_set1;
>> +
>> +	regmap_read(sgrf_regmap, RK3288_SGRF_SOC_CON0, &rk3288_sgrf_soc_con0);
>> +
>> +	regmap_read(pmu_regmap, RK3288_PMU_PWRMODE_CON,
>> +		    &rk3288_pmu_pwr_mode_con);
>> +
>> +	/* set bit 8 so that system will resume to FAST_BOOT_ADDR */
>> +	regmap_write(sgrf_regmap, RK3288_SGRF_SOC_CON0,
>> +		     SGRF_FAST_BOOT_EN | SGRF_FAST_BOOT_EN_WRITE);
>> +
>> +	/* booting address of resuming system is from this register value */
>> +	regmap_write(sgrf_regmap, RK3288_SGRF_FAST_BOOT_ADDR,
>> +		     rk3288_bootram_phy);
>> +
>> +	regmap_write(pmu_regmap, RK3288_PMU_WAKEUP_CFG1,
>> +		     PMU_ARMINT_WAKEUP_EN);
>> +
>> +	mode_set = BIT(PMU_GLOBAL_INT_DISABLE) | BIT(PMU_L2FLUSH_EN) |
>> +		   BIT(PMU_SREF0_ENTER_EN) | BIT(PMU_SREF1_ENTER_EN) |
>> +		   BIT(PMU_DDR0_GATING_EN) | BIT(PMU_DDR1_GATING_EN) |
>> +		   BIT(PMU_PWR_MODE_EN) | BIT(PMU_CHIP_PD_EN) |
>> +		   BIT(PMU_SCU_EN);
>> +
>> +	mode_set1 = BIT(PMU_CLR_CORE) | BIT(PMU_CLR_CPUP);
>> +
>> +	if (level == ROCKCHIP_ARM_OFF_LOGIC_DEEP) {
>> +		/* arm off, logic deep sleep */
>> +		mode_set |= BIT(PMU_BUS_PD_EN) |
>> +			    BIT(PMU_DDR1IO_RET_EN) | BIT(PMU_DDR0IO_RET_EN) |
>> +			    BIT(PMU_OSC_24M_DIS) | BIT(PMU_PMU_USE_LF) |
>> +			    BIT(PMU_ALIVE_USE_LF) | BIT(PMU_PLL_PD_EN);
>> +
>> +		mode_set1 |= BIT(PMU_CLR_ALIVE) | BIT(PMU_CLR_BUS) |
>> +			     BIT(PMU_CLR_PERI) | BIT(PMU_CLR_DMA);
>> +	} else {
>> +		/*
>> +		 * arm off, logic normal
>> +		 * if pmu_clk_core_src_gate_en is not set,
>> +		 * wakeup will be error
>> +		 */
>> +		mode_set |= BIT(PMU_CLK_CORE_SRC_GATE_EN);
>> +	}
>> +
>> +	regmap_write(pmu_regmap, RK3288_PMU_PWRMODE_CON, mode_set);
>> +	regmap_write(pmu_regmap, RK3288_PMU_PWRMODE_CON1, mode_set1);
>> +}
>> +
>> +static void rk3288_slp_mode_set_resume(void)
>> +{
>> +	regmap_write(pmu_regmap, RK3288_PMU_PWRMODE_CON,
>> +		     rk3288_pmu_pwr_mode_con);
>> +
>> +	regmap_write(sgrf_regmap, RK3288_SGRF_SOC_CON0,
>> +		     rk3288_sgrf_soc_con0 | SGRF_FAST_BOOT_EN_WRITE);
>> +}
>> +
>> +static int rockchip_lpmode_enter(unsigned long arg)
>> +{
>> +	flush_cache_all();
>> +
>> +	cpu_do_idle();
>> +
>> +	pr_info("Failed to suspend the system\n");
> I guess this should be a pr_err. Also could you try for a format like
> 	pr_err("%s: Failed to suspend\n", __func__);
>
> This way it at least gives an indication where is failed ... often this
> shortens the time spent searching for the place of origin :-)
Done
>
>> +
>> +	return 1;
>> +}
>> +
>> +static int rk3288_suspend_enter(suspend_state_t state)
>> +{
>> +	local_fiq_disable();
>> +
>> +	rk3288_slp_mode_set(ROCKCHIP_ARM_OFF_LOGIC_NORMAL);
>> +
>> +	cpu_suspend(0, rockchip_lpmode_enter);
>> +
>> +	rk3288_slp_mode_set_resume();
>> +
>> +	local_fiq_enable();
>> +
>> +	return 0;
>> +}
>> +
>> +static int rk3288_suspend_prepare(void)
>> +{
>> +	return regulator_suspend_prepare(PM_SUSPEND_MEM);
>> +}
>> +
>> +static void rk3288_suspend_finish(void)
>> +{
>> +	if (regulator_suspend_finish())
>> +		pr_warn("suspend finish failed\n");
> pr_err and the format containing the function name
Done
>> +}
>> +
>> +static int rk3288_suspend_iomap(void)
>> +{
>> +	struct device_node *node;
>> +	struct resource res;
>> +
>> +	node = of_find_compatible_node(NULL, NULL, "rockchip,rk3288-pmu-sram");
>> +	if (!node) {
>> +		pr_err("%s: could not find bootram dt node\n", __func__);
>> +		return -1;
> 	return -ENODEV;
Done
>
>> +	}
>> +
>> +	rk3288_bootram_base = of_iomap(node, 0);
>> +	if (!rk3288_bootram_base) {
>> +		pr_err("%s: could not map bootram base\n", __func__);
>> +		return -1;
> 	return -ENOMEM;
Done
>
>> +	}
>> +
>> +	if (of_address_to_resource(node, 0, &res)) {
>> +		pr_err("%s: could not get bootram phy addr\n", __func__);
>> +		return -1;
>> +	}
> ret = of_address_to_resource(node, 0, &res)
> if (ret) {
> 	pr_err("%s: could not get bootram phy addr\n", __func__);
> 	return ret;
> }
>
Done
>> +
>> +	rk3288_bootram_phy = res.start;
>> +
>> +	rk3288_config_bootdata();
>> +
>> +	/* copy resume code and data to bootsram */
>> +	memcpy(rk3288_bootram_base, rockchip_slp_cpu_resume,
>> +	       rk3288_bootram_sz);
>> +
>> +	return 0;
>> +}
>> +
>> +static int rk3288_suspend_init(void)
>> +{
>> +	int ret;
>> +
>> +	pmu_regmap = syscon_regmap_lookup_by_compatible(
>> +				"rockchip,rk3288-pmu");
>> +
>> +	if (IS_ERR(pmu_regmap)) {
>> +		pr_err("%s: could not find pmu regmap\n", __func__);
>> +		return -1;
> 	return PTR_ERR(pmu_regmap);
Done
>
>> +	}
>> +
>> +	sgrf_regmap = syscon_regmap_lookup_by_compatible(
>> +				"rockchip,rk3288-sgrf");
>> +
>> +	if (IS_ERR(sgrf_regmap)) {
>> +		pr_err("%s: could not find sgrf regmap\n", __func__);
>> +		return -1;
> 	return PTR_ERR(sgrf_regmap);
>
>
Done
diff mbox

Patch

diff --git a/arch/arm/mach-rockchip/Makefile b/arch/arm/mach-rockchip/Makefile
index b29d8ea..5c3a9b2 100644
--- a/arch/arm/mach-rockchip/Makefile
+++ b/arch/arm/mach-rockchip/Makefile
@@ -1,4 +1,5 @@ 
 CFLAGS_platsmp.o := -march=armv7-a
 
 obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip.o
+obj-$(CONFIG_PM_SLEEP) += pm.o sleep.o
 obj-$(CONFIG_SMP) += headsmp.o platsmp.o
diff --git a/arch/arm/mach-rockchip/pm.c b/arch/arm/mach-rockchip/pm.c
new file mode 100644
index 0000000..e059b84
--- /dev/null
+++ b/arch/arm/mach-rockchip/pm.c
@@ -0,0 +1,264 @@ 
+/*
+ * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
+ * Author: Tony Xie <tony.xie@rock-chips.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/regmap.h>
+#include <linux/suspend.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regulator/machine.h>
+
+#include <asm/cacheflush.h>
+#include <asm/tlbflush.h>
+#include <asm/suspend.h>
+
+#include "pm.h"
+
+/* These enum are option of low power mode */
+enum {
+	ROCKCHIP_ARM_OFF_LOGIC_NORMAL = 0,
+	ROCKCHIP_ARM_OFF_LOGIC_DEEP = 1,
+};
+
+struct rockchip_pm_device_id {
+	const char *compatible;
+	const struct platform_suspend_ops *ops;
+	int (*init)(void);
+};
+
+static void __iomem *rk3288_bootram_base;
+static phys_addr_t rk3288_bootram_phy;
+
+static struct regmap *pmu_regmap;
+static struct regmap *sgrf_regmap;
+
+static u32 rk3288_pmu_pwr_mode_con;
+static u32 rk3288_sgrf_soc_con0;
+
+static inline u32 rk3288_l2_config(void)
+{
+	u32 l2ctlr;
+
+	asm("mrc p15, 1, %0, c9, c0, 2" : "=r" (l2ctlr));
+	return l2ctlr;
+}
+
+static void rk3288_config_bootdata(void)
+{
+	rkpm_bootdata_cpusp = rk3288_bootram_phy + (SZ_4K - 8);
+	rkpm_bootdata_cpu_code = virt_to_phys(cpu_resume);
+
+	rkpm_bootdata_l2ctlr_f  = 1;
+	rkpm_bootdata_l2ctlr = rk3288_l2_config();
+}
+
+static void rk3288_slp_mode_set(int level)
+{
+	u32 mode_set, mode_set1;
+
+	regmap_read(sgrf_regmap, RK3288_SGRF_SOC_CON0, &rk3288_sgrf_soc_con0);
+
+	regmap_read(pmu_regmap, RK3288_PMU_PWRMODE_CON,
+		    &rk3288_pmu_pwr_mode_con);
+
+	/* set bit 8 so that system will resume to FAST_BOOT_ADDR */
+	regmap_write(sgrf_regmap, RK3288_SGRF_SOC_CON0,
+		     SGRF_FAST_BOOT_EN | SGRF_FAST_BOOT_EN_WRITE);
+
+	/* booting address of resuming system is from this register value */
+	regmap_write(sgrf_regmap, RK3288_SGRF_FAST_BOOT_ADDR,
+		     rk3288_bootram_phy);
+
+	regmap_write(pmu_regmap, RK3288_PMU_WAKEUP_CFG1,
+		     PMU_ARMINT_WAKEUP_EN);
+
+	mode_set = BIT(PMU_GLOBAL_INT_DISABLE) | BIT(PMU_L2FLUSH_EN) |
+		   BIT(PMU_SREF0_ENTER_EN) | BIT(PMU_SREF1_ENTER_EN) |
+		   BIT(PMU_DDR0_GATING_EN) | BIT(PMU_DDR1_GATING_EN) |
+		   BIT(PMU_PWR_MODE_EN) | BIT(PMU_CHIP_PD_EN) |
+		   BIT(PMU_SCU_EN);
+
+	mode_set1 = BIT(PMU_CLR_CORE) | BIT(PMU_CLR_CPUP);
+
+	if (level == ROCKCHIP_ARM_OFF_LOGIC_DEEP) {
+		/* arm off, logic deep sleep */
+		mode_set |= BIT(PMU_BUS_PD_EN) |
+			    BIT(PMU_DDR1IO_RET_EN) | BIT(PMU_DDR0IO_RET_EN) |
+			    BIT(PMU_OSC_24M_DIS) | BIT(PMU_PMU_USE_LF) |
+			    BIT(PMU_ALIVE_USE_LF) | BIT(PMU_PLL_PD_EN);
+
+		mode_set1 |= BIT(PMU_CLR_ALIVE) | BIT(PMU_CLR_BUS) |
+			     BIT(PMU_CLR_PERI) | BIT(PMU_CLR_DMA);
+	} else {
+		/*
+		 * arm off, logic normal
+		 * if pmu_clk_core_src_gate_en is not set,
+		 * wakeup will be error
+		 */
+		mode_set |= BIT(PMU_CLK_CORE_SRC_GATE_EN);
+	}
+
+	regmap_write(pmu_regmap, RK3288_PMU_PWRMODE_CON, mode_set);
+	regmap_write(pmu_regmap, RK3288_PMU_PWRMODE_CON1, mode_set1);
+}
+
+static void rk3288_slp_mode_set_resume(void)
+{
+	regmap_write(pmu_regmap, RK3288_PMU_PWRMODE_CON,
+		     rk3288_pmu_pwr_mode_con);
+
+	regmap_write(sgrf_regmap, RK3288_SGRF_SOC_CON0,
+		     rk3288_sgrf_soc_con0 | SGRF_FAST_BOOT_EN_WRITE);
+}
+
+static int rockchip_lpmode_enter(unsigned long arg)
+{
+	flush_cache_all();
+
+	cpu_do_idle();
+
+	pr_info("Failed to suspend the system\n");
+
+	return 1;
+}
+
+static int rk3288_suspend_enter(suspend_state_t state)
+{
+	local_fiq_disable();
+
+	rk3288_slp_mode_set(ROCKCHIP_ARM_OFF_LOGIC_NORMAL);
+
+	cpu_suspend(0, rockchip_lpmode_enter);
+
+	rk3288_slp_mode_set_resume();
+
+	local_fiq_enable();
+
+	return 0;
+}
+
+static int rk3288_suspend_prepare(void)
+{
+	return regulator_suspend_prepare(PM_SUSPEND_MEM);
+}
+
+static void rk3288_suspend_finish(void)
+{
+	if (regulator_suspend_finish())
+		pr_warn("suspend finish failed\n");
+}
+
+static int rk3288_suspend_iomap(void)
+{
+	struct device_node *node;
+	struct resource res;
+
+	node = of_find_compatible_node(NULL, NULL, "rockchip,rk3288-pmu-sram");
+	if (!node) {
+		pr_err("%s: could not find bootram dt node\n", __func__);
+		return -1;
+	}
+
+	rk3288_bootram_base = of_iomap(node, 0);
+	if (!rk3288_bootram_base) {
+		pr_err("%s: could not map bootram base\n", __func__);
+		return -1;
+	}
+
+	if (of_address_to_resource(node, 0, &res)) {
+		pr_err("%s: could not get bootram phy addr\n", __func__);
+		return -1;
+	}
+
+	rk3288_bootram_phy = res.start;
+
+	rk3288_config_bootdata();
+
+	/* copy resume code and data to bootsram */
+	memcpy(rk3288_bootram_base, rockchip_slp_cpu_resume,
+	       rk3288_bootram_sz);
+
+	return 0;
+}
+
+static int rk3288_suspend_init(void)
+{
+	int ret;
+
+	pmu_regmap = syscon_regmap_lookup_by_compatible(
+				"rockchip,rk3288-pmu");
+
+	if (IS_ERR(pmu_regmap)) {
+		pr_err("%s: could not find pmu regmap\n", __func__);
+		return -1;
+	}
+
+	sgrf_regmap = syscon_regmap_lookup_by_compatible(
+				"rockchip,rk3288-sgrf");
+
+	if (IS_ERR(sgrf_regmap)) {
+		pr_err("%s: could not find sgrf regmap\n", __func__);
+		return -1;
+	}
+
+	ret = rk3288_suspend_iomap();
+
+	return ret;
+}
+
+static const struct platform_suspend_ops rk3288_suspend_ops = {
+	.enter   = rk3288_suspend_enter,
+	.valid   = suspend_valid_only_mem,
+	.prepare = rk3288_suspend_prepare,
+	.finish  = rk3288_suspend_finish,
+};
+
+static const struct rockchip_pm_device_id rockchip_pm_dt_match[] __initconst = {
+	{
+		.compatible = "rockchip,rk3288",
+		.ops = &rk3288_suspend_ops,
+		.init = rk3288_suspend_init,
+	},
+	{ /* sentinel */ },
+};
+
+void __init rockchip_suspend_init(void)
+{
+	const struct rockchip_pm_device_id *matches =
+		rockchip_pm_dt_match;
+
+	while (matches->compatible && matches->ops) {
+		if (of_machine_is_compatible(matches->compatible))
+			break;
+		matches++;
+	}
+
+	if (!matches->compatible || !matches->ops) {
+		pr_err("%s:there is not a machine matched\n", __func__);
+		return;
+	}
+
+	if (matches->init) {
+		if (matches->init()) {
+			pr_err("%s: matches init error\n", __func__);
+			return;
+		}
+	}
+
+	suspend_set_ops(matches->ops);
+}
diff --git a/arch/arm/mach-rockchip/pm.h b/arch/arm/mach-rockchip/pm.h
new file mode 100644
index 0000000..99722d0
--- /dev/null
+++ b/arch/arm/mach-rockchip/pm.h
@@ -0,0 +1,99 @@ 
+/*
+ * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
+ * Author: Tony Xie <tony.xie@rock-chips.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef __MACH_ROCKCHIP_PM_H
+#define __MACH_ROCKCHIP_PM_H
+
+extern unsigned long rkpm_bootdata_cpusp;
+extern unsigned long rkpm_bootdata_cpu_code;
+extern unsigned long rkpm_bootdata_l2ctlr_f;
+extern unsigned long rkpm_bootdata_l2ctlr;
+extern unsigned long rkpm_bootdata_ddr_code;
+extern unsigned long rkpm_bootdata_ddr_data;
+extern unsigned long rk3288_bootram_sz;
+
+void rockchip_slp_cpu_resume(void);
+void __init rockchip_suspend_init(void);
+
+/****** following is rk3288 defined **********/
+#define RK3288_PMU_WAKEUP_CFG0          0x00
+#define RK3288_PMU_WAKEUP_CFG1          0x04
+#define RK3288_PMU_PWRMODE_CON          0x18
+#define RK3288_PMU_OSC_CNT              0x20
+#define RK3288_PMU_PLL_CNT              0x24
+#define RK3288_PMU_STABL_CNT            0x28
+#define RK3288_PMU_DDR0IO_PWRON_CNT     0x2c
+#define RK3288_PMU_DDR1IO_PWRON_CNT     0x30
+#define RK3288_PMU_CORE_PWRDWN_CNT      0x34
+#define RK3288_PMU_CORE_PWRUP_CNT       0x38
+#define RK3288_PMU_GPU_PWRDWN_CNT       0x3c
+#define RK3288_PMU_GPU_PWRUP_CNT        0x40
+#define RK3288_PMU_WAKEUP_RST_CLR_CNT   0x44
+#define RK3288_PMU_PWRMODE_CON1         0x90
+
+#define RK3288_SGRF_SOC_CON0            (0x0000)
+#define RK3288_SGRF_FAST_BOOT_ADDR      (0x0120)
+#define SGRF_FAST_BOOT_EN		BIT(8)
+#define SGRF_FAST_BOOT_EN_WRITE		BIT(24)
+
+#define RK3288_CRU_MODE_CON (0x50)
+#define RK3288_CRU_SEL0_CON (0x60)
+#define RK3288_CRU_SEL1_CON (0x64)
+#define RK3288_CRU_SEL10_CON (0x88)
+#define RK3288_CRU_SEL33_CON (0xe4)
+#define RK3288_CRU_SEL37_CON (0xf4)
+
+/* PMU_WAKEUP_CFG1 bits */
+#define PMU_ARMINT_WAKEUP_EN BIT(0)
+
+enum rk3288_pwr_mode_con {
+	PMU_PWR_MODE_EN = 0,
+	PMU_CLK_CORE_SRC_GATE_EN,
+	PMU_GLOBAL_INT_DISABLE,
+	PMU_L2FLUSH_EN,
+	PMU_BUS_PD_EN,
+	PMU_A12_0_PD_EN,
+	PMU_SCU_EN,
+	PMU_PLL_PD_EN,
+	PMU_CHIP_PD_EN, /* POWER OFF PIN ENABLE */
+	PMU_PWROFF_COMB,
+	PMU_ALIVE_USE_LF,
+	PMU_PMU_USE_LF,
+	PMU_OSC_24M_DIS,
+	PMU_INPUT_CLAMP_EN,
+	PMU_WAKEUP_RESET_EN,
+	PMU_SREF0_ENTER_EN,
+	PMU_SREF1_ENTER_EN,
+	PMU_DDR0IO_RET_EN,
+	PMU_DDR1IO_RET_EN,
+	PMU_DDR0_GATING_EN,
+	PMU_DDR1_GATING_EN,
+	PMU_DDR0IO_RET_DE_REQ,
+	PMU_DDR1IO_RET_DE_REQ
+};
+
+enum rk3288_pwr_mode_con1 {
+	PMU_CLR_BUS = 0,
+	PMU_CLR_CORE,
+	PMU_CLR_CPUP,
+	PMU_CLR_ALIVE,
+	PMU_CLR_DMA,
+	PMU_CLR_PERI,
+	PMU_CLR_GPU,
+	PMU_CLR_VIDEO,
+	PMU_CLR_HEVC,
+	PMU_CLR_VIO,
+};
+
+#endif /* __MACH_ROCKCHIP_PM_H */
diff --git a/arch/arm/mach-rockchip/rockchip.c b/arch/arm/mach-rockchip/rockchip.c
index d226b71..2b68a1a 100644
--- a/arch/arm/mach-rockchip/rockchip.c
+++ b/arch/arm/mach-rockchip/rockchip.c
@@ -23,9 +23,11 @@ 
 #include <asm/mach/map.h>
 #include <asm/hardware/cache-l2x0.h>
 #include "core.h"
+#include "pm.h"
 
 static void __init rockchip_dt_init(void)
 {
+	rockchip_suspend_init();
 	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 	platform_device_register_simple("cpufreq-dt", 0, NULL, 0);
 }
diff --git a/arch/arm/mach-rockchip/sleep.S b/arch/arm/mach-rockchip/sleep.S
new file mode 100644
index 0000000..2eec9a3
--- /dev/null
+++ b/arch/arm/mach-rockchip/sleep.S
@@ -0,0 +1,73 @@ 
+/*
+ * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
+ * Author: Tony Xie <tony.xie@rock-chips.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <asm/memory.h>
+
+.data
+/*
+ * this code will be copied from
+ * ddr to sram for system resumeing.
+ * so it is ".data section".
+ */
+.align
+
+ENTRY(rockchip_slp_cpu_resume)
+	setmode	PSR_I_BIT | PSR_F_BIT | SVC_MODE, r1  @ set svc, irqs off
+	mrc	p15, 0, r1, c0, c0, 5
+	and	r1, r1, #0xf
+	cmp	r1, #0
+	/* olny cpu0 can continue to run, the others is halt here */
+	beq	cpu0run
+secondary_loop:
+	wfe
+	b	secondary_loop
+cpu0run:
+	ldr	r3, rkpm_bootdata_l2ctlr_f
+	cmp	r3, #0
+	beq	sp_set
+	ldr	r3, rkpm_bootdata_l2ctlr
+	mcr	p15, 1, r3, c9, c0, 2
+sp_set:
+	ldr	sp, rkpm_bootdata_cpusp
+	ldr	r1, rkpm_bootdata_cpu_code
+	bx	r1
+ENDPROC(rockchip_slp_cpu_resume)
+
+/* Parameters filled in by the kernel */
+
+/* Flag for whether to restore L2CTLR on resume */
+	.global rkpm_bootdata_l2ctlr_f
+rkpm_bootdata_l2ctlr_f:
+	.long 0
+
+/* Saved L2CTLR to restore on resume */
+	.global rkpm_bootdata_l2ctlr
+rkpm_bootdata_l2ctlr:
+	.long 0
+
+/* CPU resume SP addr */
+	.globl rkpm_bootdata_cpusp
+rkpm_bootdata_cpusp:
+	.long 0
+
+/* CPU resume function (physical address) */
+	.globl rkpm_bootdata_cpu_code
+rkpm_bootdata_cpu_code:
+	.long 0
+
+ENTRY(rk3288_bootram_sz)
+        .word   . - rockchip_slp_cpu_resume