[PATCH 1/2] dt-bindings: usb: ci-hdrc-usb2: add property power-active-high

[PATCH 1/2] dt-bindings: usb: ci-hdrc-usb2: add property power-active-high

[Philipp Puschmann]

Signed-off-by: Philipp Puschmann <philipp.puschmann@emlix.com>
---
 Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
index adae82385dd6..8696e3eff6e7 100644
--- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
+++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
@@ -93,6 +93,7 @@ i.mx specific properties
 - over-current-active-low: over current signal polarity is active low.
 - over-current-active-high: over current signal polarity is active high.
   It's recommended to specify the over current polarity.
+- power-active-high: power signal polarity is high active (only for imx6q/dl)
 - external-vbus-divider: enables off-chip resistor divider for Vbus
 
 Example:
-- 
2.20.1

[PATCH 2/2] usb: chipidea: imx: set power polarity

[Philipp Puschmann]

This patch adds support to set the power line polarity for i.MX6q/dl.

To let the USB controller control the power it may be necessary to configure
the polarity of the power line. So far the polarity was configured
by Bootloader or alternatively the power line was muxed as gpio and
driven by a regulator.

Signed-off-by: Philipp Puschmann <philipp.puschmann@emlix.com>
---
 drivers/usb/chipidea/ci_hdrc_imx.c | 3 +++
 drivers/usb/chipidea/ci_hdrc_imx.h | 1 +
 drivers/usb/chipidea/usbmisc_imx.c | 4 ++++
 3 files changed, 8 insertions(+)

diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
index e81de9ca8729..32dc120680fa 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -152,6 +152,9 @@ static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
 		dev_warn(dev, "No over current polarity defined\n");
 	}
 
+	if (of_find_property(np, "power-active-high", NULL))
+		data->pwr_pol = 1;
+
 	if (of_find_property(np, "external-vbus-divider", NULL))
 		data->evdo = 1;
 
diff --git a/drivers/usb/chipidea/ci_hdrc_imx.h b/drivers/usb/chipidea/ci_hdrc_imx.h
index 7cc53e2ce564..c842e03f8767 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.h
+++ b/drivers/usb/chipidea/ci_hdrc_imx.h
@@ -18,6 +18,7 @@ struct imx_usbmisc_data {
 	/* true if dt specifies polarity */
 	unsigned int oc_pol_configured:1;
 
+	unsigned int pwr_pol:1; /* power polarity */
 	unsigned int evdo:1; /* set external vbus divider option */
 	unsigned int ulpi:1; /* connected to an ULPI phy */
 	unsigned int hsic:1; /* HSIC controlller */
diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c
index 097ffbca0bd9..13e52632aece 100644
--- a/drivers/usb/chipidea/usbmisc_imx.c
+++ b/drivers/usb/chipidea/usbmisc_imx.c
@@ -63,6 +63,7 @@
 #define MX6_BM_NON_BURST_SETTING	BIT(1)
 #define MX6_BM_OVER_CUR_DIS		BIT(7)
 #define MX6_BM_OVER_CUR_POLARITY	BIT(8)
+#define MX6_BM_PWR_POLARITY		BIT(9)
 #define MX6_BM_WAKEUP_ENABLE		BIT(10)
 #define MX6_BM_UTMI_ON_CLOCK		BIT(13)
 #define MX6_BM_ID_WAKEUP		BIT(16)
@@ -383,6 +384,9 @@ static int usbmisc_imx6q_init(struct imx_usbmisc_data *data)
 		else if (data->oc_pol_configured)
 			reg &= ~MX6_BM_OVER_CUR_POLARITY;
 	}
+	/* If the polarity is not set keep it as setup by the bootlader */
+	if (data->pwr_polarity == 1)
+		reg |= MX6_BM_PWR_POLARITY;
 	writel(reg, usbmisc->base + data->index * 4);
 
 	/* SoC non-burst setting */
-- 
2.20.1

[PATCH v2,1/2] dt-bindings: usb: ci-hdrc-usb2: add property power-active-high

[Philipp Puschmann]

Signed-off-by: Philipp Puschmann <philipp.puschmann@emlix.com>

---

V2: unchanged ...

---
 Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
index adae82385dd6..8696e3eff6e7 100644
--- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
+++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
@@ -93,6 +93,7 @@ i.mx specific properties
 - over-current-active-low: over current signal polarity is active low.
 - over-current-active-high: over current signal polarity is active high.
   It's recommended to specify the over current polarity.
+- power-active-high: power signal polarity is high active (only for imx6q/dl)
 - external-vbus-divider: enables off-chip resistor divider for Vbus
 
 Example:
-- 
2.20.1

[PATCH v2,2/2] usb: chipidea: imx: set power polarity

[Philipp Puschmann]

This patch adds support to set the power line polarity for i.MX6q/dl.

To let the USB controller control the power it may be necessary to configure
the polarity of the power line. So far the polarity was configured
by Bootloader or alternatively the power line was muxed as gpio and
driven by a regulator.

Signed-off-by: Philipp Puschmann <philipp.puschmann@emlix.com>
---

V2: fixed wrong variable name ...

---
 drivers/usb/chipidea/ci_hdrc_imx.c | 3 +++
 drivers/usb/chipidea/ci_hdrc_imx.h | 1 +
 drivers/usb/chipidea/usbmisc_imx.c | 4 ++++
 3 files changed, 8 insertions(+)

diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
index e81de9ca8729..32dc120680fa 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -152,6 +152,9 @@ static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
 		dev_warn(dev, "No over current polarity defined\n");
 	}
 
+	if (of_find_property(np, "power-active-high", NULL))
+		data->pwr_pol = 1;
+
 	if (of_find_property(np, "external-vbus-divider", NULL))
 		data->evdo = 1;
 
diff --git a/drivers/usb/chipidea/ci_hdrc_imx.h b/drivers/usb/chipidea/ci_hdrc_imx.h
index 7cc53e2ce564..c842e03f8767 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.h
+++ b/drivers/usb/chipidea/ci_hdrc_imx.h
@@ -18,6 +18,7 @@ struct imx_usbmisc_data {
 	/* true if dt specifies polarity */
 	unsigned int oc_pol_configured:1;
 
+	unsigned int pwr_pol:1; /* power polarity */
 	unsigned int evdo:1; /* set external vbus divider option */
 	unsigned int ulpi:1; /* connected to an ULPI phy */
 	unsigned int hsic:1; /* HSIC controlller */
diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c
index 097ffbca0bd9..64a7c7ff4b35 100644
--- a/drivers/usb/chipidea/usbmisc_imx.c
+++ b/drivers/usb/chipidea/usbmisc_imx.c
@@ -63,6 +63,7 @@
 #define MX6_BM_NON_BURST_SETTING	BIT(1)
 #define MX6_BM_OVER_CUR_DIS		BIT(7)
 #define MX6_BM_OVER_CUR_POLARITY	BIT(8)
+#define MX6_BM_PWR_POLARITY		BIT(9)
 #define MX6_BM_WAKEUP_ENABLE		BIT(10)
 #define MX6_BM_UTMI_ON_CLOCK		BIT(13)
 #define MX6_BM_ID_WAKEUP		BIT(16)
@@ -383,6 +384,9 @@ static int usbmisc_imx6q_init(struct imx_usbmisc_data *data)
 		else if (data->oc_pol_configured)
 			reg &= ~MX6_BM_OVER_CUR_POLARITY;
 	}
+	/* If the polarity is not set keep it as setup by the bootlader */
+	if (data->pwr_pol == 1)
+		reg |= MX6_BM_PWR_POLARITY;
 	writel(reg, usbmisc->base + data->index * 4);
 
 	/* SoC non-burst setting */
-- 
2.20.1

[PATCH v3 1/2] dt-bindings: usb: ci-hdrc-usb2: add property power-active-high

[Philipp Puschmann]

The i.MX6q/dl USB controller may drive the usb power line directly, but the
polarity depends on the board. Reset state of the polarity is low-active so
add this property to allow it to be high-active.

Signed-off-by: Philipp Puschmann <philipp.puschmann@emlix.com>
---
Changes in v3: add description
---
 Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
index adae82385dd6..8696e3eff6e7 100644
--- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
+++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
@@ -93,6 +93,7 @@ i.mx specific properties
 - over-current-active-low: over current signal polarity is active low.
 - over-current-active-high: over current signal polarity is active high.
   It's recommended to specify the over current polarity.
+- power-active-high: power signal polarity is high active (only for imx6q/dl)
 - external-vbus-divider: enables off-chip resistor divider for Vbus
 
 Example:
-- 
2.20.1

[PATCH v3 2/2] usb: chipidea: imx: set power polarity

[Philipp Puschmann]

This patch adds support to set the power line polarity for i.MX6q/dl.

To let the USB controller control the power it may be necessary to configure
the polarity of the power line. So far the polarity was configured
by Bootloader or alternatively the power line was muxed as gpio and
driven by a regulator.

Signed-off-by: Philipp Puschmann <philipp.puschmann@emlix.com>
---
Changes in v2: fixed usage of wrong variable name
Changes in v3: no changes
---
 drivers/usb/chipidea/ci_hdrc_imx.c | 3 +++
 drivers/usb/chipidea/ci_hdrc_imx.h | 1 +
 drivers/usb/chipidea/usbmisc_imx.c | 4 ++++
 3 files changed, 8 insertions(+)

diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
index e81de9ca8729..32dc120680fa 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -152,6 +152,9 @@ static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
 		dev_warn(dev, "No over current polarity defined\n");
 	}
 
+	if (of_find_property(np, "power-active-high", NULL))
+		data->pwr_pol = 1;
+
 	if (of_find_property(np, "external-vbus-divider", NULL))
 		data->evdo = 1;
 
diff --git a/drivers/usb/chipidea/ci_hdrc_imx.h b/drivers/usb/chipidea/ci_hdrc_imx.h
index 7cc53e2ce564..c842e03f8767 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.h
+++ b/drivers/usb/chipidea/ci_hdrc_imx.h
@@ -18,6 +18,7 @@ struct imx_usbmisc_data {
 	/* true if dt specifies polarity */
 	unsigned int oc_pol_configured:1;
 
+	unsigned int pwr_pol:1; /* power polarity */
 	unsigned int evdo:1; /* set external vbus divider option */
 	unsigned int ulpi:1; /* connected to an ULPI phy */
 	unsigned int hsic:1; /* HSIC controlller */
diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c
index 097ffbca0bd9..64a7c7ff4b35 100644
--- a/drivers/usb/chipidea/usbmisc_imx.c
+++ b/drivers/usb/chipidea/usbmisc_imx.c
@@ -63,6 +63,7 @@
 #define MX6_BM_NON_BURST_SETTING	BIT(1)
 #define MX6_BM_OVER_CUR_DIS		BIT(7)
 #define MX6_BM_OVER_CUR_POLARITY	BIT(8)
+#define MX6_BM_PWR_POLARITY		BIT(9)
 #define MX6_BM_WAKEUP_ENABLE		BIT(10)
 #define MX6_BM_UTMI_ON_CLOCK		BIT(13)
 #define MX6_BM_ID_WAKEUP		BIT(16)
@@ -383,6 +384,9 @@ static int usbmisc_imx6q_init(struct imx_usbmisc_data *data)
 		else if (data->oc_pol_configured)
 			reg &= ~MX6_BM_OVER_CUR_POLARITY;
 	}
+	/* If the polarity is not set keep it as setup by the bootlader */
+	if (data->pwr_pol == 1)
+		reg |= MX6_BM_PWR_POLARITY;
 	writel(reg, usbmisc->base + data->index * 4);
 
 	/* SoC non-burst setting */
-- 
2.20.1

Re: [PATCH v2,2/2] usb: chipidea: imx: set power polarity

[Sergei Shtylyov]

Hello!

On 01/16/2019 01:51 PM, Philipp Puschmann wrote:

> This patch adds support to set the power line polarity for i.MX6q/dl.
> 
> To let the USB controller control the power it may be necessary to configure
> the polarity of the power line. So far the polarity was configured
> by Bootloader or alternatively the power line was muxed as gpio and
> driven by a regulator.
> 
> Signed-off-by: Philipp Puschmann <philipp.puschmann@emlix.com>
> ---
> 
> V2: fixed wrong variable name ...
> 
> ---
>  drivers/usb/chipidea/ci_hdrc_imx.c | 3 +++
>  drivers/usb/chipidea/ci_hdrc_imx.h | 1 +
>  drivers/usb/chipidea/usbmisc_imx.c | 4 ++++
>  3 files changed, 8 insertions(+)
> 
> diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
> index e81de9ca8729..32dc120680fa 100644
> --- a/drivers/usb/chipidea/ci_hdrc_imx.c
> +++ b/drivers/usb/chipidea/ci_hdrc_imx.c
> @@ -152,6 +152,9 @@ static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
>  		dev_warn(dev, "No over current polarity defined\n");
>  	}
>  
> +	if (of_find_property(np, "power-active-high", NULL))

   How about of_property_read_bool()?

> +		data->pwr_pol = 1;
> +
>  	if (of_find_property(np, "external-vbus-divider", NULL))
>  		data->evdo = 1;
>  
[...]

MBR, Sergei

Re: [PATCH v3 1/2] dt-bindings: usb: ci-hdrc-usb2: add property power-active-high

[Rob Herring]

On Wed, 16 Jan 2019 12:11:32 +0100, Philipp Puschmann wrote:
> The i.MX6q/dl USB controller may drive the usb power line directly, but the
> polarity depends on the board. Reset state of the polarity is low-active so
> add this property to allow it to be high-active.
> 
> Signed-off-by: Philipp Puschmann <philipp.puschmann@emlix.com>
> ---
> Changes in v3: add description
> ---
>  Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 1 +
>  1 file changed, 1 insertion(+)
> 

Reviewed-by: Rob Herring <robh@kernel.org>

RE: [PATCH v3 1/2] dt-bindings: usb: ci-hdrc-usb2: add property power-active-high

[Peter Chen]

 
> 
> The i.MX6q/dl USB controller may drive the usb power line directly, but the polarity
> depends on the board. Reset state of the polarity is low-active so add this property
> to allow it to be high-active.
> 

As far as I know, most of i.mx USB controllers (except imx28/23, but they don't have non-core registers)
work like this, and most of them are low active for PP default. Would you just use "i.mx" at
both your code and your comment?

Peter

> Signed-off-by: Philipp Puschmann <philipp.puschmann@emlix.com>
> ---
> Changes in v3: add description
> ---
>  Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> index adae82385dd6..8696e3eff6e7 100644
> --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> @@ -93,6 +93,7 @@ i.mx specific properties
>  - over-current-active-low: over current signal polarity is active low.
>  - over-current-active-high: over current signal polarity is active high.
>    It's recommended to specify the over current polarity.
> +- power-active-high: power signal polarity is high active (only for
> +imx6q/dl)
>  - external-vbus-divider: enables off-chip resistor divider for Vbus
> 
>  Example:
> --
> 2.20.1

Re: [PATCH v2,2/2] usb: chipidea: imx: set power polarity

[Philipp Puschmann]

Hi!

Am 16.01.19 um 17:32 schrieb Sergei Shtylyov:
> Hello!
> 
> On 01/16/2019 01:51 PM, Philipp Puschmann wrote:
> 
>> This patch adds support to set the power line polarity for i.MX6q/dl.
>>
>> To let the USB controller control the power it may be necessary to configure
>> the polarity of the power line. So far the polarity was configured
>> by Bootloader or alternatively the power line was muxed as gpio and
>> driven by a regulator.
>>
>> Signed-off-by: Philipp Puschmann <philipp.puschmann@emlix.com>
>> ---
>>
>> V2: fixed wrong variable name ...
>>
>> ---
>>  drivers/usb/chipidea/ci_hdrc_imx.c | 3 +++
>>  drivers/usb/chipidea/ci_hdrc_imx.h | 1 +
>>  drivers/usb/chipidea/usbmisc_imx.c | 4 ++++
>>  3 files changed, 8 insertions(+)
>>
>> diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
>> index e81de9ca8729..32dc120680fa 100644
>> --- a/drivers/usb/chipidea/ci_hdrc_imx.c
>> +++ b/drivers/usb/chipidea/ci_hdrc_imx.c
>> @@ -152,6 +152,9 @@ static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
>>  		dev_warn(dev, "No over current polarity defined\n");
>>  	}
>>  
>> +	if (of_find_property(np, "power-active-high", NULL))
> 
>    How about of_property_read_bool()?

Good idea. I will send a patch v4 in next days.
> 
>> +		data->pwr_pol = 1;
>> +
>>  	if (of_find_property(np, "external-vbus-divider", NULL))
>>  		data->evdo = 1;
>>  
> [...]
> 
> MBR, Sergei
> 

Re: [PATCH v3 1/2] dt-bindings: usb: ci-hdrc-usb2: add property power-active-high

[Philipp Puschmann]

Hi Peter,

Am 17.01.19 um 08:01 schrieb Peter Chen:
>  
>>
>> The i.MX6q/dl USB controller may drive the usb power line directly, but the polarity
>> depends on the board. Reset state of the polarity is low-active so add this property
>> to allow it to be high-active.
>>
> 
> As far as I know, most of i.mx USB controllers (except imx28/23, but they don't have non-core registers)
> work like this, and most of them are low active for PP default. Would you just use "i.mx" at
> both your code and your comment?

Am i right that i have to add my code block to (nearly) all other version specific init functions then?
Will do so in next days and then send a v4 of this patch.
> 
> Peter
> 
>> Signed-off-by: Philipp Puschmann <philipp.puschmann@emlix.com>
>> ---
>> Changes in v3: add description
>> ---
>>  Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
>> b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
>> index adae82385dd6..8696e3eff6e7 100644
>> --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
>> +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
>> @@ -93,6 +93,7 @@ i.mx specific properties
>>  - over-current-active-low: over current signal polarity is active low.
>>  - over-current-active-high: over current signal polarity is active high.
>>    It's recommended to specify the over current polarity.
>> +- power-active-high: power signal polarity is high active (only for
>> +imx6q/dl)
>>  - external-vbus-divider: enables off-chip resistor divider for Vbus
>>
>>  Example:
>> --
>> 2.20.1
> 

RE: [PATCH v3 1/2] dt-bindings: usb: ci-hdrc-usb2: add property power-active-high

[Peter Chen]

 
> Am 17.01.19 um 08:01 schrieb Peter Chen:
> >
> >>
> >> The i.MX6q/dl USB controller may drive the usb power line directly,
> >> but the polarity depends on the board. Reset state of the polarity is
> >> low-active so add this property to allow it to be high-active.
> >>
> >
> > As far as I know, most of i.mx USB controllers (except imx28/23, but
> > they don't have non-core registers) work like this, and most of them
> > are low active for PP default. Would you just use "i.mx" at both your code and
> your comment?
> 
> Am i right that i have to add my code block to (nearly) all other version specific init
> functions then?

Besides your current patch, only usbmisc_imx7d_init is needed to add the same content.

Peter

> Will do so in next days and then send a v4 of this patch.
> >
> > Peter
> >
> >> Signed-off-by: Philipp Puschmann <philipp.puschmann@emlix.com>
> >> ---
> >> Changes in v3: add description
> >> ---
> >>  Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 1 +
> >>  1 file changed, 1 insertion(+)
> >>
> >> diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> >> b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> >> index adae82385dd6..8696e3eff6e7 100644
> >> --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> >> +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> >> @@ -93,6 +93,7 @@ i.mx specific properties
> >>  - over-current-active-low: over current signal polarity is active low.
> >>  - over-current-active-high: over current signal polarity is active high.
> >>    It's recommended to specify the over current polarity.
> >> +- power-active-high: power signal polarity is high active (only for
> >> +imx6q/dl)
> >>  - external-vbus-divider: enables off-chip resistor divider for Vbus
> >>
> >>  Example:
> >> --
> >> 2.20.1
> >