[PATCH v2 0/3] mfd: EXYNOS: Properly shutdown Odroid XU3

[PATCH v2 0/3] mfd: EXYNOS: Properly shutdown Odroid XU3

[Krzysztof Kozlowski]

Hi,

Changelog put in each patch message.

This fixes shutdown of Odroid XU3 family. More details in patch 2.

Patches are independent, please pick up freely.

Best regards,
Krzysztof


Krzysztof Kozlowski (3):
  mfd: documentation: dt: Document grounded ACOKB pin on S2MPS11
  mfd: s2mps11: Add manual shutdown method for Odroid XU3
  ARM: dts: Fix power off method on exynos5422-odroidxu3

 Documentation/devicetree/bindings/mfd/s2mps11.txt  |  4 +++
 arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi |  1 +
 drivers/mfd/sec-core.c                             | 30 ++++++++++++++++++++++
 include/linux/mfd/samsung/core.h                   |  2 ++
 include/linux/mfd/samsung/s2mps11.h                |  1 +
 5 files changed, 38 insertions(+)

-- 
2.1.4

[PATCH v2 1/3] mfd: documentation: dt: Document grounded ACOKB pin on S2MPS11

[Krzysztof Kozlowski]

Document a new Device Tree property 'samsung,s2mps11-acokb-ground'
indicating that ACOKB pin of S2MPS11 PMIC is connected to the ground so
the PMIC must manually set PWRHOLD bit in CTRL1 register to turn off the
power.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Lee Jones <lee.jones@linaro.org>

---

Changes since v1:
1. Split bindings documentation to separate patch (suggested by Lee).
2. Add Javier's reviewed-by and Lee's acked-by.
---
 Documentation/devicetree/bindings/mfd/s2mps11.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/s2mps11.txt b/Documentation/devicetree/bindings/mfd/s2mps11.txt
index 57a045016fca..90eaef393325 100644
--- a/Documentation/devicetree/bindings/mfd/s2mps11.txt
+++ b/Documentation/devicetree/bindings/mfd/s2mps11.txt
@@ -15,6 +15,10 @@ Optional properties:
 - interrupt-parent: Specifies the phandle of the interrupt controller to which
   the interrupts from s2mps11 are delivered to.
 - interrupts: Interrupt specifiers for interrupt sources.
+- samsung,s2mps11-acokb-ground: Indicates that ACOKB pin of S2MPS11 PMIC is
+  connected to the ground so the PMIC must manually set PWRHOLD bit in CTRL1
+  register to turn off the power. Usually the ACOKB is pulled up to VBATT so
+  when PWRHOLD pin goes low, the rising ACOKB will trigger power off.
 
 Optional nodes:
 - clocks: s2mps11, s2mps13 and s5m8767 provide three(AP/CP/BT) buffered 32.768
-- 
2.1.4

RE: [PATCH v2 1/3] mfd: documentation: dt: Document grounded ACOKB pin on S2MPS11

[Kukjin Kim]

Krzysztof Kozlowski wrote:
> 
> Document a new Device Tree property 'samsung,s2mps11-acokb-ground'
> indicating that ACOKB pin of S2MPS11 PMIC is connected to the ground so
> the PMIC must manually set PWRHOLD bit in CTRL1 register to turn off the
> power.
> 
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
> Acked-by: Lee Jones <lee.jones@linaro.org>
> 
> ---
> 
> Changes since v1:
> 1. Split bindings documentation to separate patch (suggested by Lee).
> 2. Add Javier's reviewed-by and Lee's acked-by.
> ---
>  Documentation/devicetree/bindings/mfd/s2mps11.txt | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mfd/s2mps11.txt
> b/Documentation/devicetree/bindings/mfd/s2mps11.txt
> index 57a045016fca..90eaef393325 100644
> --- a/Documentation/devicetree/bindings/mfd/s2mps11.txt
> +++ b/Documentation/devicetree/bindings/mfd/s2mps11.txt
> @@ -15,6 +15,10 @@ Optional properties:
>  - interrupt-parent: Specifies the phandle of the interrupt controller to which
>    the interrupts from s2mps11 are delivered to.
>  - interrupts: Interrupt specifiers for interrupt sources.
> +- samsung,s2mps11-acokb-ground: Indicates that ACOKB pin of S2MPS11 PMIC is
> +  connected to the ground so the PMIC must manually set PWRHOLD bit in CTRL1
> +  register to turn off the power. Usually the ACOKB is pulled up to VBATT so
> +  when PWRHOLD pin goes low, the rising ACOKB will trigger power off.
> 
>  Optional nodes:
>  - clocks: s2mps11, s2mps13 and s5m8767 provide three(AP/CP/BT) buffered 32.768
> --
> 2.1.4

Applied 1/3 and 3/3.

Thanks,
Kukjin

Re: [PATCH v2 1/3] mfd: documentation: dt: Document grounded ACOKB pin on S2MPS11

[Lee Jones]

On Fri, 14 Aug 2015, Kukjin Kim wrote:

> Krzysztof Kozlowski wrote:
> > 
> > Document a new Device Tree property 'samsung,s2mps11-acokb-ground'
> > indicating that ACOKB pin of S2MPS11 PMIC is connected to the ground so
> > the PMIC must manually set PWRHOLD bit in CTRL1 register to turn off the
> > power.
> > 
> > Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
> > Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
> > Acked-by: Lee Jones <lee.jones@linaro.org>
> > 
> > ---
> > 
> > Changes since v1:
> > 1. Split bindings documentation to separate patch (suggested by Lee).
> > 2. Add Javier's reviewed-by and Lee's acked-by.
> > ---
> >  Documentation/devicetree/bindings/mfd/s2mps11.txt | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/mfd/s2mps11.txt
> > b/Documentation/devicetree/bindings/mfd/s2mps11.txt
> > index 57a045016fca..90eaef393325 100644
> > --- a/Documentation/devicetree/bindings/mfd/s2mps11.txt
> > +++ b/Documentation/devicetree/bindings/mfd/s2mps11.txt
> > @@ -15,6 +15,10 @@ Optional properties:
> >  - interrupt-parent: Specifies the phandle of the interrupt controller to which
> >    the interrupts from s2mps11 are delivered to.
> >  - interrupts: Interrupt specifiers for interrupt sources.
> > +- samsung,s2mps11-acokb-ground: Indicates that ACOKB pin of S2MPS11 PMIC is
> > +  connected to the ground so the PMIC must manually set PWRHOLD bit in CTRL1
> > +  register to turn off the power. Usually the ACOKB is pulled up to VBATT so
> > +  when PWRHOLD pin goes low, the rising ACOKB will trigger power off.
> > 
> >  Optional nodes:
> >  - clocks: s2mps11, s2mps13 and s5m8767 provide three(AP/CP/BT) buffered 32.768
> 
> Applied 1/3 and 3/3.

Any chance you applied these on their own branch (which can be
tagged)?

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[PATCH v2 2/3] mfd: s2mps11: Add manual shutdown method for Odroid XU3

[Krzysztof Kozlowski]

On Odroid XU3 board (with S2MPS11 PMIC) the PWRHOLD bit in CTRL1
register must be manually set to 0 before initiating power off sequence.

One of usual power down methods for Exynos based devices looks like:
1. PWRHOLD pin of PMIC is connected to PSHOLD of Exynos.
2. Exynos holds up this pin during system operation.
3. ACOKB pin of PMIC is pulled up to VBATT and optionally to pin in
   other device.
4. When PWRHOLD/PSHOLD goes low, the PMIC will turn off the power if
   ACOKB goes high.

On Odroid XU3 family the difference is in (3) - the ACOKB is grounded.
This means that PMIC must manually set PWRHOLD field to low and then
wait for signal from Application Processor (the usual change in
PWRHOLD/PSHOLD pin will actually cut off the power).

The patch adds respective binding allowing Odroid XU3 device to be
powered off.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Reported-by: Anand Moon <linux.amoon@gmail.com>
Tested-by: Anand Moon <linux.amoon@gmail.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Lee Jones <lee.jones@linaro.org>

---

Changes since v1:
1. Split bindings documentation to separate patch (suggested by Lee).
2. Fix additional empty line (suggested by Lee).
3. Add Anand's tested-by, Javier's reviewed-by and Lee's acked-by.

Patch is losely based on patch in Hardkernel repository [0] and previous
work of Anand Moon [1].

[0] https://github.com/hardkernel/linux/commit/6897e62ba328bd1c8c095d918101863250cd73e7
[1] http://www.spinics.net/lists/linux-samsung-soc/msg45959.html
---
 drivers/mfd/sec-core.c              | 30 ++++++++++++++++++++++++++++++
 include/linux/mfd/samsung/core.h    |  2 ++
 include/linux/mfd/samsung/s2mps11.h |  1 +
 3 files changed, 33 insertions(+)

diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
index d206a3e8fe87..2d1137a7a0ee 100644
--- a/drivers/mfd/sec-core.c
+++ b/drivers/mfd/sec-core.c
@@ -278,6 +278,8 @@ static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
 	 * not parsed here.
 	 */
 
+	pd->manual_poweroff = of_property_read_bool(dev->of_node,
+						"samsung,s2mps11-acokb-ground");
 	return pd;
 }
 #else
@@ -440,6 +442,33 @@ static int sec_pmic_remove(struct i2c_client *i2c)
 	return 0;
 }
 
+static void sec_pmic_shutdown(struct i2c_client *i2c)
+{
+	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
+	unsigned int reg, mask;
+
+	if (!sec_pmic->pdata->manual_poweroff)
+		return;
+
+	switch (sec_pmic->device_type) {
+	case S2MPS11X:
+		reg = S2MPS11_REG_CTRL1;
+		mask = S2MPS11_CTRL1_PWRHOLD_MASK;
+		break;
+	default:
+		/*
+		 * Currently only one board with S2MPS11 needs this, so just
+		 * ignore the rest.
+		 */
+		dev_warn(sec_pmic->dev,
+			"Unsupported device %lu for manual power off\n",
+			sec_pmic->device_type);
+		return;
+	}
+
+	regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, 0);
+}
+
 #ifdef CONFIG_PM_SLEEP
 static int sec_pmic_suspend(struct device *dev)
 {
@@ -491,6 +520,7 @@ static struct i2c_driver sec_pmic_driver = {
 	},
 	.probe = sec_pmic_probe,
 	.remove = sec_pmic_remove,
+	.shutdown = sec_pmic_shutdown,
 	.id_table = sec_pmic_id,
 };
 
diff --git a/include/linux/mfd/samsung/core.h b/include/linux/mfd/samsung/core.h
index 75115384f3fc..aa78957e092f 100644
--- a/include/linux/mfd/samsung/core.h
+++ b/include/linux/mfd/samsung/core.h
@@ -132,6 +132,8 @@ struct sec_platform_data {
 	int				buck2_init;
 	int				buck3_init;
 	int				buck4_init;
+	/* Whether or not manually set PWRHOLD to low during shutdown. */
+	bool				manual_poweroff;
 };
 
 /**
diff --git a/include/linux/mfd/samsung/s2mps11.h b/include/linux/mfd/samsung/s2mps11.h
index 7981a9d77d3f..b288965e8101 100644
--- a/include/linux/mfd/samsung/s2mps11.h
+++ b/include/linux/mfd/samsung/s2mps11.h
@@ -179,6 +179,7 @@ enum s2mps11_regulators {
 #define S2MPS11_BUCK_N_VOLTAGES (S2MPS11_BUCK_VSEL_MASK + 1)
 #define S2MPS11_RAMP_DELAY	25000		/* uV/us */
 
+#define S2MPS11_CTRL1_PWRHOLD_MASK	BIT(4)
 
 #define S2MPS11_BUCK2_RAMP_SHIFT	6
 #define S2MPS11_BUCK34_RAMP_SHIFT	4
-- 
2.1.4

Re: [PATCH v2 2/3] mfd: s2mps11: Add manual shutdown method for Odroid XU3

[Krzysztof Kozlowski]

Hi Lee,

You acked this patch. However finally it did not go through other tree
so maybe you could pick it up for 4.4?

If you want I could reabse and resend it.

Best regards,
Krzysztof


2015-08-11 19:09 GMT+09:00 Krzysztof Kozlowski <k.kozlowski.k-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>:
>
> On Odroid XU3 board (with S2MPS11 PMIC) the PWRHOLD bit in CTRL1
> register must be manually set to 0 before initiating power off sequence.
>
> One of usual power down methods for Exynos based devices looks like:
> 1. PWRHOLD pin of PMIC is connected to PSHOLD of Exynos.
> 2. Exynos holds up this pin during system operation.
> 3. ACOKB pin of PMIC is pulled up to VBATT and optionally to pin in
>    other device.
> 4. When PWRHOLD/PSHOLD goes low, the PMIC will turn off the power if
>    ACOKB goes high.
>
> On Odroid XU3 family the difference is in (3) - the ACOKB is grounded.
> This means that PMIC must manually set PWRHOLD field to low and then
> wait for signal from Application Processor (the usual change in
> PWRHOLD/PSHOLD pin will actually cut off the power).
>
> The patch adds respective binding allowing Odroid XU3 device to be
> powered off.
>
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Reported-by: Anand Moon <linux.amoon-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Tested-by: Anand Moon <linux.amoon-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Reviewed-by: Javier Martinez Canillas <javier-JPH+aEBZ4P+UEJcrhfAQsw@public.gmane.org>
> Acked-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
>
> ---
>
> Changes since v1:
> 1. Split bindings documentation to separate patch (suggested by Lee).
> 2. Fix additional empty line (suggested by Lee).
> 3. Add Anand's tested-by, Javier's reviewed-by and Lee's acked-by.
>
> Patch is losely based on patch in Hardkernel repository [0] and previous
> work of Anand Moon [1].
>
> [0] https://github.com/hardkernel/linux/commit/6897e62ba328bd1c8c095d918101863250cd73e7
> [1] http://www.spinics.net/lists/linux-samsung-soc/msg45959.html
> ---
>  drivers/mfd/sec-core.c              | 30 ++++++++++++++++++++++++++++++
>  include/linux/mfd/samsung/core.h    |  2 ++
>  include/linux/mfd/samsung/s2mps11.h |  1 +
>  3 files changed, 33 insertions(+)
>
> diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
> index d206a3e8fe87..2d1137a7a0ee 100644
> --- a/drivers/mfd/sec-core.c
> +++ b/drivers/mfd/sec-core.c
> @@ -278,6 +278,8 @@ static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
>          * not parsed here.
>          */
>
> +       pd->manual_poweroff = of_property_read_bool(dev->of_node,
> +                                               "samsung,s2mps11-acokb-ground");
>         return pd;
>  }
>  #else
> @@ -440,6 +442,33 @@ static int sec_pmic_remove(struct i2c_client *i2c)
>         return 0;
>  }
>
> +static void sec_pmic_shutdown(struct i2c_client *i2c)
> +{
> +       struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
> +       unsigned int reg, mask;
> +
> +       if (!sec_pmic->pdata->manual_poweroff)
> +               return;
> +
> +       switch (sec_pmic->device_type) {
> +       case S2MPS11X:
> +               reg = S2MPS11_REG_CTRL1;
> +               mask = S2MPS11_CTRL1_PWRHOLD_MASK;
> +               break;
> +       default:
> +               /*
> +                * Currently only one board with S2MPS11 needs this, so just
> +                * ignore the rest.
> +                */
> +               dev_warn(sec_pmic->dev,
> +                       "Unsupported device %lu for manual power off\n",
> +                       sec_pmic->device_type);
> +               return;
> +       }
> +
> +       regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, 0);
> +}
> +
>  #ifdef CONFIG_PM_SLEEP
>  static int sec_pmic_suspend(struct device *dev)
>  {
> @@ -491,6 +520,7 @@ static struct i2c_driver sec_pmic_driver = {
>         },
>         .probe = sec_pmic_probe,
>         .remove = sec_pmic_remove,
> +       .shutdown = sec_pmic_shutdown,
>         .id_table = sec_pmic_id,
>  };
>
> diff --git a/include/linux/mfd/samsung/core.h b/include/linux/mfd/samsung/core.h
> index 75115384f3fc..aa78957e092f 100644
> --- a/include/linux/mfd/samsung/core.h
> +++ b/include/linux/mfd/samsung/core.h
> @@ -132,6 +132,8 @@ struct sec_platform_data {
>         int                             buck2_init;
>         int                             buck3_init;
>         int                             buck4_init;
> +       /* Whether or not manually set PWRHOLD to low during shutdown. */
> +       bool                            manual_poweroff;
>  };
>
>  /**
> diff --git a/include/linux/mfd/samsung/s2mps11.h b/include/linux/mfd/samsung/s2mps11.h
> index 7981a9d77d3f..b288965e8101 100644
> --- a/include/linux/mfd/samsung/s2mps11.h
> +++ b/include/linux/mfd/samsung/s2mps11.h
> @@ -179,6 +179,7 @@ enum s2mps11_regulators {
>  #define S2MPS11_BUCK_N_VOLTAGES (S2MPS11_BUCK_VSEL_MASK + 1)
>  #define S2MPS11_RAMP_DELAY     25000           /* uV/us */
>
> +#define S2MPS11_CTRL1_PWRHOLD_MASK     BIT(4)
>
>  #define S2MPS11_BUCK2_RAMP_SHIFT       6
>  #define S2MPS11_BUCK34_RAMP_SHIFT      4
> --
> 2.1.4
>
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Re: [PATCH v2 2/3] mfd: s2mps11: Add manual shutdown method for Odroid XU3

[Lee Jones]

On Sun, 13 Sep 2015, Krzysztof Kozlowski wrote:
> You acked this patch. However finally it did not go through other tree
> so maybe you could pick it up for 4.4?
> 
> If you want I could reabse and resend it.

Yes, please rebase and resend.

> 2015-08-11 19:09 GMT+09:00 Krzysztof Kozlowski <k.kozlowski.k@gmail.com>:
> >
> > On Odroid XU3 board (with S2MPS11 PMIC) the PWRHOLD bit in CTRL1
> > register must be manually set to 0 before initiating power off sequence.
> >
> > One of usual power down methods for Exynos based devices looks like:
> > 1. PWRHOLD pin of PMIC is connected to PSHOLD of Exynos.
> > 2. Exynos holds up this pin during system operation.
> > 3. ACOKB pin of PMIC is pulled up to VBATT and optionally to pin in
> >    other device.
> > 4. When PWRHOLD/PSHOLD goes low, the PMIC will turn off the power if
> >    ACOKB goes high.
> >
> > On Odroid XU3 family the difference is in (3) - the ACOKB is grounded.
> > This means that PMIC must manually set PWRHOLD field to low and then
> > wait for signal from Application Processor (the usual change in
> > PWRHOLD/PSHOLD pin will actually cut off the power).
> >
> > The patch adds respective binding allowing Odroid XU3 device to be
> > powered off.
> >
> > Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
> > Reported-by: Anand Moon <linux.amoon@gmail.com>
> > Tested-by: Anand Moon <linux.amoon@gmail.com>
> > Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
> > Acked-by: Lee Jones <lee.jones@linaro.org>
> >
> > ---
> >
> > Changes since v1:
> > 1. Split bindings documentation to separate patch (suggested by Lee).
> > 2. Fix additional empty line (suggested by Lee).
> > 3. Add Anand's tested-by, Javier's reviewed-by and Lee's acked-by.
> >
> > Patch is losely based on patch in Hardkernel repository [0] and previous
> > work of Anand Moon [1].
> >
> > [0] https://github.com/hardkernel/linux/commit/6897e62ba328bd1c8c095d918101863250cd73e7
> > [1] http://www.spinics.net/lists/linux-samsung-soc/msg45959.html
> > ---
> >  drivers/mfd/sec-core.c              | 30 ++++++++++++++++++++++++++++++
> >  include/linux/mfd/samsung/core.h    |  2 ++
> >  include/linux/mfd/samsung/s2mps11.h |  1 +
> >  3 files changed, 33 insertions(+)
> >
> > diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
> > index d206a3e8fe87..2d1137a7a0ee 100644
> > --- a/drivers/mfd/sec-core.c
> > +++ b/drivers/mfd/sec-core.c
> > @@ -278,6 +278,8 @@ static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
> >          * not parsed here.
> >          */
> >
> > +       pd->manual_poweroff = of_property_read_bool(dev->of_node,
> > +                                               "samsung,s2mps11-acokb-ground");
> >         return pd;
> >  }
> >  #else
> > @@ -440,6 +442,33 @@ static int sec_pmic_remove(struct i2c_client *i2c)
> >         return 0;
> >  }
> >
> > +static void sec_pmic_shutdown(struct i2c_client *i2c)
> > +{
> > +       struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
> > +       unsigned int reg, mask;
> > +
> > +       if (!sec_pmic->pdata->manual_poweroff)
> > +               return;
> > +
> > +       switch (sec_pmic->device_type) {
> > +       case S2MPS11X:
> > +               reg = S2MPS11_REG_CTRL1;
> > +               mask = S2MPS11_CTRL1_PWRHOLD_MASK;
> > +               break;
> > +       default:
> > +               /*
> > +                * Currently only one board with S2MPS11 needs this, so just
> > +                * ignore the rest.
> > +                */
> > +               dev_warn(sec_pmic->dev,
> > +                       "Unsupported device %lu for manual power off\n",
> > +                       sec_pmic->device_type);
> > +               return;
> > +       }
> > +
> > +       regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, 0);
> > +}
> > +
> >  #ifdef CONFIG_PM_SLEEP
> >  static int sec_pmic_suspend(struct device *dev)
> >  {
> > @@ -491,6 +520,7 @@ static struct i2c_driver sec_pmic_driver = {
> >         },
> >         .probe = sec_pmic_probe,
> >         .remove = sec_pmic_remove,
> > +       .shutdown = sec_pmic_shutdown,
> >         .id_table = sec_pmic_id,
> >  };
> >
> > diff --git a/include/linux/mfd/samsung/core.h b/include/linux/mfd/samsung/core.h
> > index 75115384f3fc..aa78957e092f 100644
> > --- a/include/linux/mfd/samsung/core.h
> > +++ b/include/linux/mfd/samsung/core.h
> > @@ -132,6 +132,8 @@ struct sec_platform_data {
> >         int                             buck2_init;
> >         int                             buck3_init;
> >         int                             buck4_init;
> > +       /* Whether or not manually set PWRHOLD to low during shutdown. */
> > +       bool                            manual_poweroff;
> >  };
> >
> >  /**
> > diff --git a/include/linux/mfd/samsung/s2mps11.h b/include/linux/mfd/samsung/s2mps11.h
> > index 7981a9d77d3f..b288965e8101 100644
> > --- a/include/linux/mfd/samsung/s2mps11.h
> > +++ b/include/linux/mfd/samsung/s2mps11.h
> > @@ -179,6 +179,7 @@ enum s2mps11_regulators {
> >  #define S2MPS11_BUCK_N_VOLTAGES (S2MPS11_BUCK_VSEL_MASK + 1)
> >  #define S2MPS11_RAMP_DELAY     25000           /* uV/us */
> >
> > +#define S2MPS11_CTRL1_PWRHOLD_MASK     BIT(4)
> >
> >  #define S2MPS11_BUCK2_RAMP_SHIFT       6
> >  #define S2MPS11_BUCK34_RAMP_SHIFT      4
> >

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[PATCH v2 3/3] ARM: dts: Fix power off method on exynos5422-odroidxu3

[Krzysztof Kozlowski]

The Odroid XU3 family boards have ACOKB pin of PMIC grounded, instead of
pulled up as usual. This means that PMIC must manually set PWRHOLD field
in its CTRL1 register to low before initiating power down.

This fixes Odroid XU3 powering off:
[   25.966053] reboot: Power down
[   25.967679] Power down.
[   26.070174] Power down failed, please power off system manually.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Reported-by: Anand Moon <linux.amoon@gmail.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>

---

Changes since v1:
1. Add Javier's reviewed-by.
---
 arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
index 1565667e6f69..48cecc8cf26e 100644
--- a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
+++ b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
@@ -159,6 +159,7 @@
 		s2mps11,buck2-ramp-enable = <1>;
 		s2mps11,buck3-ramp-enable = <1>;
 		s2mps11,buck4-ramp-enable = <1>;
+		samsung,s2mps11-acokb-ground;
 
 		interrupt-parent = <&gpx0>;
 		interrupts = <4 IRQ_TYPE_EDGE_FALLING>;
-- 
2.1.4