* [PATCH v1] ARM: imx6: add pm_power_off support for i.mx6 chips
@ 2014-09-11 6:41 ` Robin Gong
0 siblings, 0 replies; 5+ messages in thread
From: Robin Gong @ 2014-09-11 6:41 UTC (permalink / raw)
To: linux-arm-kernel
All chips of i.mx6 can be powered off by programming SNVS.
For example :
On i.mx6q-sabresd board, PMIC_ON_REQ connect with external
pmic ON/OFF pin, that will cause the whole PMIC powered off
except VSNVS. And system can restart once PMIC_ON_REQ goes
high by push POWRER key.
Signed-off-by: Robin Gong <b38343@freescale.com>
---
arch/arm/mach-imx/common.h | 1 +
arch/arm/mach-imx/mach-imx6q.c | 2 ++
arch/arm/mach-imx/mach-imx6sl.c | 2 ++
arch/arm/mach-imx/mach-imx6sx.c | 2 ++
arch/arm/mach-imx/system.c | 22 +++++++++++++++++++++-
5 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
index 1dabf43..baca11a 100644
--- a/arch/arm/mach-imx/common.h
+++ b/arch/arm/mach-imx/common.h
@@ -62,6 +62,7 @@ void mxc_set_cpu_type(unsigned int type);
void mxc_restart(enum reboot_mode, const char *);
void mxc_arch_reset_init(void __iomem *);
void mxc_arch_reset_init_dt(void);
+void mxc_power_off_init(void);
int mx51_revision(void);
int mx53_revision(void);
void imx_set_aips(void __iomem *);
diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
index d51c6e9..3d6610d 100644
--- a/arch/arm/mach-imx/mach-imx6q.c
+++ b/arch/arm/mach-imx/mach-imx6q.c
@@ -270,6 +270,8 @@ static void __init imx6q_init_machine(void)
mxc_arch_reset_init_dt();
+ mxc_power_off_init();
+
parent = imx_soc_device_init();
if (parent == NULL)
pr_warn("failed to initialize soc device\n");
diff --git a/arch/arm/mach-imx/mach-imx6sl.c b/arch/arm/mach-imx/mach-imx6sl.c
index ed263a2..c07e6e8 100644
--- a/arch/arm/mach-imx/mach-imx6sl.c
+++ b/arch/arm/mach-imx/mach-imx6sl.c
@@ -50,6 +50,8 @@ static void __init imx6sl_init_machine(void)
mxc_arch_reset_init_dt();
+ mxc_power_off_init();
+
parent = imx_soc_device_init();
if (parent == NULL)
pr_warn("failed to initialize soc device\n");
diff --git a/arch/arm/mach-imx/mach-imx6sx.c b/arch/arm/mach-imx/mach-imx6sx.c
index 3de3b73..68ea070 100644
--- a/arch/arm/mach-imx/mach-imx6sx.c
+++ b/arch/arm/mach-imx/mach-imx6sx.c
@@ -20,6 +20,8 @@ static void __init imx6sx_init_machine(void)
mxc_arch_reset_init_dt();
+ mxc_power_off_init();
+
parent = imx_soc_device_init();
if (parent == NULL)
pr_warn("failed to initialize soc device\n");
diff --git a/arch/arm/mach-imx/system.c b/arch/arm/mach-imx/system.c
index d14c33f..925fb29 100644
--- a/arch/arm/mach-imx/system.c
+++ b/arch/arm/mach-imx/system.c
@@ -23,6 +23,7 @@
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/of_address.h>
+#include <linux/pm.h>
#include <asm/system_misc.h>
#include <asm/proc-fns.h>
@@ -32,7 +33,9 @@
#include "common.h"
#include "hardware.h"
-static void __iomem *wdog_base;
+#define SNVS_LPCR 0x04
+
+static void __iomem *wdog_base, *snvs_base;
static struct clk *wdog_clk;
/*
@@ -104,6 +107,23 @@ void __init mxc_arch_reset_init_dt(void)
clk_prepare(wdog_clk);
}
+static void power_off_snvs(void)
+{
+ u32 value = readl(snvs_base + SNVS_LPCR);
+ /* set TOP and DP_EN bit */
+ writel(value | 0x60, snvs_base + SNVS_LPCR);
+}
+
+void __init mxc_power_off_init(void)
+{
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0-mon-rtc-lp");
+ snvs_base = of_iomap(np, 0);
+ WARN_ON(!snvs_base);
+ pm_power_off = power_off_snvs;
+}
+
#ifdef CONFIG_CACHE_L2X0
void __init imx_init_l2cache(void)
{
--
1.9.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH v1] ARM: imx6: add pm_power_off support for i.mx6 chips
@ 2014-09-11 6:41 ` Robin Gong
0 siblings, 0 replies; 5+ messages in thread
From: Robin Gong @ 2014-09-11 6:41 UTC (permalink / raw)
To: shawn.guo, kernel, linux; +Cc: linux-arm-kernel, linux-kernel
All chips of i.mx6 can be powered off by programming SNVS.
For example :
On i.mx6q-sabresd board, PMIC_ON_REQ connect with external
pmic ON/OFF pin, that will cause the whole PMIC powered off
except VSNVS. And system can restart once PMIC_ON_REQ goes
high by push POWRER key.
Signed-off-by: Robin Gong <b38343@freescale.com>
---
arch/arm/mach-imx/common.h | 1 +
arch/arm/mach-imx/mach-imx6q.c | 2 ++
arch/arm/mach-imx/mach-imx6sl.c | 2 ++
arch/arm/mach-imx/mach-imx6sx.c | 2 ++
arch/arm/mach-imx/system.c | 22 +++++++++++++++++++++-
5 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
index 1dabf43..baca11a 100644
--- a/arch/arm/mach-imx/common.h
+++ b/arch/arm/mach-imx/common.h
@@ -62,6 +62,7 @@ void mxc_set_cpu_type(unsigned int type);
void mxc_restart(enum reboot_mode, const char *);
void mxc_arch_reset_init(void __iomem *);
void mxc_arch_reset_init_dt(void);
+void mxc_power_off_init(void);
int mx51_revision(void);
int mx53_revision(void);
void imx_set_aips(void __iomem *);
diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
index d51c6e9..3d6610d 100644
--- a/arch/arm/mach-imx/mach-imx6q.c
+++ b/arch/arm/mach-imx/mach-imx6q.c
@@ -270,6 +270,8 @@ static void __init imx6q_init_machine(void)
mxc_arch_reset_init_dt();
+ mxc_power_off_init();
+
parent = imx_soc_device_init();
if (parent == NULL)
pr_warn("failed to initialize soc device\n");
diff --git a/arch/arm/mach-imx/mach-imx6sl.c b/arch/arm/mach-imx/mach-imx6sl.c
index ed263a2..c07e6e8 100644
--- a/arch/arm/mach-imx/mach-imx6sl.c
+++ b/arch/arm/mach-imx/mach-imx6sl.c
@@ -50,6 +50,8 @@ static void __init imx6sl_init_machine(void)
mxc_arch_reset_init_dt();
+ mxc_power_off_init();
+
parent = imx_soc_device_init();
if (parent == NULL)
pr_warn("failed to initialize soc device\n");
diff --git a/arch/arm/mach-imx/mach-imx6sx.c b/arch/arm/mach-imx/mach-imx6sx.c
index 3de3b73..68ea070 100644
--- a/arch/arm/mach-imx/mach-imx6sx.c
+++ b/arch/arm/mach-imx/mach-imx6sx.c
@@ -20,6 +20,8 @@ static void __init imx6sx_init_machine(void)
mxc_arch_reset_init_dt();
+ mxc_power_off_init();
+
parent = imx_soc_device_init();
if (parent == NULL)
pr_warn("failed to initialize soc device\n");
diff --git a/arch/arm/mach-imx/system.c b/arch/arm/mach-imx/system.c
index d14c33f..925fb29 100644
--- a/arch/arm/mach-imx/system.c
+++ b/arch/arm/mach-imx/system.c
@@ -23,6 +23,7 @@
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/of_address.h>
+#include <linux/pm.h>
#include <asm/system_misc.h>
#include <asm/proc-fns.h>
@@ -32,7 +33,9 @@
#include "common.h"
#include "hardware.h"
-static void __iomem *wdog_base;
+#define SNVS_LPCR 0x04
+
+static void __iomem *wdog_base, *snvs_base;
static struct clk *wdog_clk;
/*
@@ -104,6 +107,23 @@ void __init mxc_arch_reset_init_dt(void)
clk_prepare(wdog_clk);
}
+static void power_off_snvs(void)
+{
+ u32 value = readl(snvs_base + SNVS_LPCR);
+ /* set TOP and DP_EN bit */
+ writel(value | 0x60, snvs_base + SNVS_LPCR);
+}
+
+void __init mxc_power_off_init(void)
+{
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0-mon-rtc-lp");
+ snvs_base = of_iomap(np, 0);
+ WARN_ON(!snvs_base);
+ pm_power_off = power_off_snvs;
+}
+
#ifdef CONFIG_CACHE_L2X0
void __init imx_init_l2cache(void)
{
--
1.9.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH v1] ARM: imx6: add pm_power_off support for i.mx6 chips
2014-09-11 6:41 ` Robin Gong
@ 2014-09-11 8:29 ` Shawn Guo
-1 siblings, 0 replies; 5+ messages in thread
From: Shawn Guo @ 2014-09-11 8:29 UTC (permalink / raw)
To: linux-arm-kernel
On Thu, Sep 11, 2014 at 02:41:07PM +0800, Robin Gong wrote:
> All chips of i.mx6 can be powered off by programming SNVS.
> For example :
> On i.mx6q-sabresd board, PMIC_ON_REQ connect with external
> pmic ON/OFF pin, that will cause the whole PMIC powered off
> except VSNVS. And system can restart once PMIC_ON_REQ goes
> high by push POWRER key.
>
> Signed-off-by: Robin Gong <b38343@freescale.com>
> ---
> arch/arm/mach-imx/common.h | 1 +
> arch/arm/mach-imx/mach-imx6q.c | 2 ++
> arch/arm/mach-imx/mach-imx6sl.c | 2 ++
> arch/arm/mach-imx/mach-imx6sx.c | 2 ++
> arch/arm/mach-imx/system.c | 22 +++++++++++++++++++++-
> 5 files changed, 28 insertions(+), 1 deletion(-)
I think we'd better add a little poweroff driver under
drivers/power/reset/ rather than having it in platform code.
Shawn
>
> diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
> index 1dabf43..baca11a 100644
> --- a/arch/arm/mach-imx/common.h
> +++ b/arch/arm/mach-imx/common.h
> @@ -62,6 +62,7 @@ void mxc_set_cpu_type(unsigned int type);
> void mxc_restart(enum reboot_mode, const char *);
> void mxc_arch_reset_init(void __iomem *);
> void mxc_arch_reset_init_dt(void);
> +void mxc_power_off_init(void);
> int mx51_revision(void);
> int mx53_revision(void);
> void imx_set_aips(void __iomem *);
> diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
> index d51c6e9..3d6610d 100644
> --- a/arch/arm/mach-imx/mach-imx6q.c
> +++ b/arch/arm/mach-imx/mach-imx6q.c
> @@ -270,6 +270,8 @@ static void __init imx6q_init_machine(void)
>
> mxc_arch_reset_init_dt();
>
> + mxc_power_off_init();
> +
> parent = imx_soc_device_init();
> if (parent == NULL)
> pr_warn("failed to initialize soc device\n");
> diff --git a/arch/arm/mach-imx/mach-imx6sl.c b/arch/arm/mach-imx/mach-imx6sl.c
> index ed263a2..c07e6e8 100644
> --- a/arch/arm/mach-imx/mach-imx6sl.c
> +++ b/arch/arm/mach-imx/mach-imx6sl.c
> @@ -50,6 +50,8 @@ static void __init imx6sl_init_machine(void)
>
> mxc_arch_reset_init_dt();
>
> + mxc_power_off_init();
> +
> parent = imx_soc_device_init();
> if (parent == NULL)
> pr_warn("failed to initialize soc device\n");
> diff --git a/arch/arm/mach-imx/mach-imx6sx.c b/arch/arm/mach-imx/mach-imx6sx.c
> index 3de3b73..68ea070 100644
> --- a/arch/arm/mach-imx/mach-imx6sx.c
> +++ b/arch/arm/mach-imx/mach-imx6sx.c
> @@ -20,6 +20,8 @@ static void __init imx6sx_init_machine(void)
>
> mxc_arch_reset_init_dt();
>
> + mxc_power_off_init();
> +
> parent = imx_soc_device_init();
> if (parent == NULL)
> pr_warn("failed to initialize soc device\n");
> diff --git a/arch/arm/mach-imx/system.c b/arch/arm/mach-imx/system.c
> index d14c33f..925fb29 100644
> --- a/arch/arm/mach-imx/system.c
> +++ b/arch/arm/mach-imx/system.c
> @@ -23,6 +23,7 @@
> #include <linux/delay.h>
> #include <linux/of.h>
> #include <linux/of_address.h>
> +#include <linux/pm.h>
>
> #include <asm/system_misc.h>
> #include <asm/proc-fns.h>
> @@ -32,7 +33,9 @@
> #include "common.h"
> #include "hardware.h"
>
> -static void __iomem *wdog_base;
> +#define SNVS_LPCR 0x04
> +
> +static void __iomem *wdog_base, *snvs_base;
> static struct clk *wdog_clk;
>
> /*
> @@ -104,6 +107,23 @@ void __init mxc_arch_reset_init_dt(void)
> clk_prepare(wdog_clk);
> }
>
> +static void power_off_snvs(void)
> +{
> + u32 value = readl(snvs_base + SNVS_LPCR);
> + /* set TOP and DP_EN bit */
> + writel(value | 0x60, snvs_base + SNVS_LPCR);
> +}
> +
> +void __init mxc_power_off_init(void)
> +{
> + struct device_node *np;
> +
> + np = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0-mon-rtc-lp");
> + snvs_base = of_iomap(np, 0);
> + WARN_ON(!snvs_base);
> + pm_power_off = power_off_snvs;
> +}
> +
> #ifdef CONFIG_CACHE_L2X0
> void __init imx_init_l2cache(void)
> {
> --
> 1.9.1
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v1] ARM: imx6: add pm_power_off support for i.mx6 chips
@ 2014-09-11 8:29 ` Shawn Guo
0 siblings, 0 replies; 5+ messages in thread
From: Shawn Guo @ 2014-09-11 8:29 UTC (permalink / raw)
To: Robin Gong; +Cc: kernel, linux, linux-arm-kernel, linux-kernel
On Thu, Sep 11, 2014 at 02:41:07PM +0800, Robin Gong wrote:
> All chips of i.mx6 can be powered off by programming SNVS.
> For example :
> On i.mx6q-sabresd board, PMIC_ON_REQ connect with external
> pmic ON/OFF pin, that will cause the whole PMIC powered off
> except VSNVS. And system can restart once PMIC_ON_REQ goes
> high by push POWRER key.
>
> Signed-off-by: Robin Gong <b38343@freescale.com>
> ---
> arch/arm/mach-imx/common.h | 1 +
> arch/arm/mach-imx/mach-imx6q.c | 2 ++
> arch/arm/mach-imx/mach-imx6sl.c | 2 ++
> arch/arm/mach-imx/mach-imx6sx.c | 2 ++
> arch/arm/mach-imx/system.c | 22 +++++++++++++++++++++-
> 5 files changed, 28 insertions(+), 1 deletion(-)
I think we'd better add a little poweroff driver under
drivers/power/reset/ rather than having it in platform code.
Shawn
>
> diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
> index 1dabf43..baca11a 100644
> --- a/arch/arm/mach-imx/common.h
> +++ b/arch/arm/mach-imx/common.h
> @@ -62,6 +62,7 @@ void mxc_set_cpu_type(unsigned int type);
> void mxc_restart(enum reboot_mode, const char *);
> void mxc_arch_reset_init(void __iomem *);
> void mxc_arch_reset_init_dt(void);
> +void mxc_power_off_init(void);
> int mx51_revision(void);
> int mx53_revision(void);
> void imx_set_aips(void __iomem *);
> diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
> index d51c6e9..3d6610d 100644
> --- a/arch/arm/mach-imx/mach-imx6q.c
> +++ b/arch/arm/mach-imx/mach-imx6q.c
> @@ -270,6 +270,8 @@ static void __init imx6q_init_machine(void)
>
> mxc_arch_reset_init_dt();
>
> + mxc_power_off_init();
> +
> parent = imx_soc_device_init();
> if (parent == NULL)
> pr_warn("failed to initialize soc device\n");
> diff --git a/arch/arm/mach-imx/mach-imx6sl.c b/arch/arm/mach-imx/mach-imx6sl.c
> index ed263a2..c07e6e8 100644
> --- a/arch/arm/mach-imx/mach-imx6sl.c
> +++ b/arch/arm/mach-imx/mach-imx6sl.c
> @@ -50,6 +50,8 @@ static void __init imx6sl_init_machine(void)
>
> mxc_arch_reset_init_dt();
>
> + mxc_power_off_init();
> +
> parent = imx_soc_device_init();
> if (parent == NULL)
> pr_warn("failed to initialize soc device\n");
> diff --git a/arch/arm/mach-imx/mach-imx6sx.c b/arch/arm/mach-imx/mach-imx6sx.c
> index 3de3b73..68ea070 100644
> --- a/arch/arm/mach-imx/mach-imx6sx.c
> +++ b/arch/arm/mach-imx/mach-imx6sx.c
> @@ -20,6 +20,8 @@ static void __init imx6sx_init_machine(void)
>
> mxc_arch_reset_init_dt();
>
> + mxc_power_off_init();
> +
> parent = imx_soc_device_init();
> if (parent == NULL)
> pr_warn("failed to initialize soc device\n");
> diff --git a/arch/arm/mach-imx/system.c b/arch/arm/mach-imx/system.c
> index d14c33f..925fb29 100644
> --- a/arch/arm/mach-imx/system.c
> +++ b/arch/arm/mach-imx/system.c
> @@ -23,6 +23,7 @@
> #include <linux/delay.h>
> #include <linux/of.h>
> #include <linux/of_address.h>
> +#include <linux/pm.h>
>
> #include <asm/system_misc.h>
> #include <asm/proc-fns.h>
> @@ -32,7 +33,9 @@
> #include "common.h"
> #include "hardware.h"
>
> -static void __iomem *wdog_base;
> +#define SNVS_LPCR 0x04
> +
> +static void __iomem *wdog_base, *snvs_base;
> static struct clk *wdog_clk;
>
> /*
> @@ -104,6 +107,23 @@ void __init mxc_arch_reset_init_dt(void)
> clk_prepare(wdog_clk);
> }
>
> +static void power_off_snvs(void)
> +{
> + u32 value = readl(snvs_base + SNVS_LPCR);
> + /* set TOP and DP_EN bit */
> + writel(value | 0x60, snvs_base + SNVS_LPCR);
> +}
> +
> +void __init mxc_power_off_init(void)
> +{
> + struct device_node *np;
> +
> + np = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0-mon-rtc-lp");
> + snvs_base = of_iomap(np, 0);
> + WARN_ON(!snvs_base);
> + pm_power_off = power_off_snvs;
> +}
> +
> #ifdef CONFIG_CACHE_L2X0
> void __init imx_init_l2cache(void)
> {
> --
> 1.9.1
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH v1] ARM: imx6: add pm_power_off support for i.mx6 chips
2014-10-21 1:06 [PATCH v2] ARM: dts: imx6dl: disable dma support for spi on i.mx6dl Robin Gong
@ 2014-10-21 1:06 ` Robin Gong
0 siblings, 0 replies; 5+ messages in thread
From: Robin Gong @ 2014-10-21 1:06 UTC (permalink / raw)
To: vinod.koul, dan.j.williams, andriy.shevchenko
Cc: dmaengine, linux-kernel, b38343
All chips of i.mx6 can be powered off by programming SNVS.
For example :
On i.mx6q-sabresd board, PMIC_ON_REQ connect with external
pmic ON/OFF pin, that will cause the whole PMIC powered off
except VSNVS. And system can restart once PMIC_ON_REQ goes
high by push POWRER key.
Signed-off-by: Robin Gong <b38343@freescale.com>
---
arch/arm/mach-imx/common.h | 1 +
arch/arm/mach-imx/mach-imx6q.c | 2 ++
arch/arm/mach-imx/mach-imx6sl.c | 2 ++
arch/arm/mach-imx/mach-imx6sx.c | 2 ++
arch/arm/mach-imx/system.c | 22 +++++++++++++++++++++-
5 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
index 1dabf43..baca11a 100644
--- a/arch/arm/mach-imx/common.h
+++ b/arch/arm/mach-imx/common.h
@@ -62,6 +62,7 @@ void mxc_set_cpu_type(unsigned int type);
void mxc_restart(enum reboot_mode, const char *);
void mxc_arch_reset_init(void __iomem *);
void mxc_arch_reset_init_dt(void);
+void mxc_power_off_init(void);
int mx51_revision(void);
int mx53_revision(void);
void imx_set_aips(void __iomem *);
diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
index d51c6e9..3d6610d 100644
--- a/arch/arm/mach-imx/mach-imx6q.c
+++ b/arch/arm/mach-imx/mach-imx6q.c
@@ -270,6 +270,8 @@ static void __init imx6q_init_machine(void)
mxc_arch_reset_init_dt();
+ mxc_power_off_init();
+
parent = imx_soc_device_init();
if (parent == NULL)
pr_warn("failed to initialize soc device\n");
diff --git a/arch/arm/mach-imx/mach-imx6sl.c b/arch/arm/mach-imx/mach-imx6sl.c
index ed263a2..c07e6e8 100644
--- a/arch/arm/mach-imx/mach-imx6sl.c
+++ b/arch/arm/mach-imx/mach-imx6sl.c
@@ -50,6 +50,8 @@ static void __init imx6sl_init_machine(void)
mxc_arch_reset_init_dt();
+ mxc_power_off_init();
+
parent = imx_soc_device_init();
if (parent == NULL)
pr_warn("failed to initialize soc device\n");
diff --git a/arch/arm/mach-imx/mach-imx6sx.c b/arch/arm/mach-imx/mach-imx6sx.c
index 3de3b73..68ea070 100644
--- a/arch/arm/mach-imx/mach-imx6sx.c
+++ b/arch/arm/mach-imx/mach-imx6sx.c
@@ -20,6 +20,8 @@ static void __init imx6sx_init_machine(void)
mxc_arch_reset_init_dt();
+ mxc_power_off_init();
+
parent = imx_soc_device_init();
if (parent == NULL)
pr_warn("failed to initialize soc device\n");
diff --git a/arch/arm/mach-imx/system.c b/arch/arm/mach-imx/system.c
index d14c33f..925fb29 100644
--- a/arch/arm/mach-imx/system.c
+++ b/arch/arm/mach-imx/system.c
@@ -23,6 +23,7 @@
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/of_address.h>
+#include <linux/pm.h>
#include <asm/system_misc.h>
#include <asm/proc-fns.h>
@@ -32,7 +33,9 @@
#include "common.h"
#include "hardware.h"
-static void __iomem *wdog_base;
+#define SNVS_LPCR 0x04
+
+static void __iomem *wdog_base, *snvs_base;
static struct clk *wdog_clk;
/*
@@ -104,6 +107,23 @@ void __init mxc_arch_reset_init_dt(void)
clk_prepare(wdog_clk);
}
+static void power_off_snvs(void)
+{
+ u32 value = readl(snvs_base + SNVS_LPCR);
+ /* set TOP and DP_EN bit */
+ writel(value | 0x60, snvs_base + SNVS_LPCR);
+}
+
+void __init mxc_power_off_init(void)
+{
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0-mon-rtc-lp");
+ snvs_base = of_iomap(np, 0);
+ WARN_ON(!snvs_base);
+ pm_power_off = power_off_snvs;
+}
+
#ifdef CONFIG_CACHE_L2X0
void __init imx_init_l2cache(void)
{
--
1.9.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
end of thread, other threads:[~2014-10-21 2:12 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2014-09-11 6:41 [PATCH v1] ARM: imx6: add pm_power_off support for i.mx6 chips Robin Gong
2014-09-11 6:41 ` Robin Gong
2014-09-11 8:29 ` Shawn Guo
2014-09-11 8:29 ` Shawn Guo
-- strict thread matches above, loose matches on Subject: below --
2014-10-21 1:06 [PATCH v2] ARM: dts: imx6dl: disable dma support for spi on i.mx6dl Robin Gong
2014-10-21 1:06 ` [PATCH v1] ARM: imx6: add pm_power_off support for i.mx6 chips Robin Gong
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