[PATCH 0/3] phy: rcar-gen3-usb2: add vbus-supply and extcon

[PATCH 0/3] phy: rcar-gen3-usb2: add vbus-supply and extcon

[Yoshihiro Shimoda]

This patch set is based on the latest linux-phy / next branch
(commit id = 89636adde4a05953e3bf18807ba1f6f205572f67)
and the following patches:

http://thread.gmane.org/gmane.linux.kernel/2166364
http://thread.gmane.org/gmane.linux.kernel.renesas-soc/1512/focus=1514

The patch "Add vbus-supply to handle VBUS on/off" has
Rob's Acked-by as the followings:
http://thread.gmane.org/gmane.linux.kernel.renesas-soc/1087/focus=1153

Yoshihiro Shimoda (3):
  phy: rcar-gen3-usb2: remove unnecesary struct rcar_gen3_data
  phy: rcar-gen3-usb2: Add vbus-supply to handle VBUS on/off
  phy: rcar-gen3-usb2: add extcon support

 .../devicetree/bindings/phy/rcar-gen3-phy-usb2.txt |  2 +
 drivers/phy/Kconfig                                |  1 +
 drivers/phy/phy-rcar-gen3-usb2.c                   | 87 +++++++++++++++++-----
 3 files changed, 71 insertions(+), 19 deletions(-)

-- 
1.9.1

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[PATCH 1/3] phy: rcar-gen3-usb2: remove unnecesary struct rcar_gen3_data

[Yoshihiro Shimoda]

Since this driver uses the struct rcar_gen3_data in struct rcar_gen3_chan
only, we can remove the rcar_gen3_data.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---
 drivers/phy/phy-rcar-gen3-usb2.c | 33 ++++++++++++++-------------------
 1 file changed, 14 insertions(+), 19 deletions(-)

diff --git a/drivers/phy/phy-rcar-gen3-usb2.c b/drivers/phy/phy-rcar-gen3-usb2.c
index 257be74..3c647cd 100644
--- a/drivers/phy/phy-rcar-gen3-usb2.c
+++ b/drivers/phy/phy-rcar-gen3-usb2.c
@@ -74,20 +74,15 @@
 #define USB2_ADPCTRL_IDPULLUP		BIT(5)	/* 1 = ID sampling is enabled */
 #define USB2_ADPCTRL_DRVVBUS		BIT(4)
 
-struct rcar_gen3_data {
-	void __iomem *base;
-	struct clk *clk;
-};
-
 struct rcar_gen3_chan {
-	struct rcar_gen3_data usb2;
+	void __iomem *base;
 	struct phy *phy;
 	bool has_otg;
 };
 
 static void rcar_gen3_set_host_mode(struct rcar_gen3_chan *ch, int host)
 {
-	void __iomem *usb2_base = ch->usb2.base;
+	void __iomem *usb2_base = ch->base;
 	u32 val = readl(usb2_base + USB2_COMMCTRL);
 
 	dev_vdbg(&ch->phy->dev, "%s: %08x, %d\n", __func__, val, host);
@@ -100,7 +95,7 @@ static void rcar_gen3_set_host_mode(struct rcar_gen3_chan *ch, int host)
 
 static void rcar_gen3_set_linectrl(struct rcar_gen3_chan *ch, int dp, int dm)
 {
-	void __iomem *usb2_base = ch->usb2.base;
+	void __iomem *usb2_base = ch->base;
 	u32 val = readl(usb2_base + USB2_LINECTRL1);
 
 	dev_vdbg(&ch->phy->dev, "%s: %08x, %d, %d\n", __func__, val, dp, dm);
@@ -114,7 +109,7 @@ static void rcar_gen3_set_linectrl(struct rcar_gen3_chan *ch, int dp, int dm)
 
 static void rcar_gen3_enable_vbus_ctrl(struct rcar_gen3_chan *ch, int vbus)
 {
-	void __iomem *usb2_base = ch->usb2.base;
+	void __iomem *usb2_base = ch->base;
 	u32 val = readl(usb2_base + USB2_ADPCTRL);
 
 	dev_vdbg(&ch->phy->dev, "%s: %08x, %d\n", __func__, val, vbus);
@@ -141,13 +136,13 @@ static void rcar_gen3_init_for_peri(struct rcar_gen3_chan *ch)
 
 static bool rcar_gen3_check_vbus(struct rcar_gen3_chan *ch)
 {
-	return !!(readl(ch->usb2.base + USB2_ADPCTRL) &
+	return !!(readl(ch->base + USB2_ADPCTRL) &
 		  USB2_ADPCTRL_OTGSESSVLD);
 }
 
 static bool rcar_gen3_check_id(struct rcar_gen3_chan *ch)
 {
-	return !!(readl(ch->usb2.base + USB2_ADPCTRL) & USB2_ADPCTRL_IDDIG);
+	return !!(readl(ch->base + USB2_ADPCTRL) & USB2_ADPCTRL_IDDIG);
 }
 
 static void rcar_gen3_device_recognition(struct rcar_gen3_chan *ch)
@@ -166,7 +161,7 @@ static void rcar_gen3_device_recognition(struct rcar_gen3_chan *ch)
 
 static void rcar_gen3_init_otg(struct rcar_gen3_chan *ch)
 {
-	void __iomem *usb2_base = ch->usb2.base;
+	void __iomem *usb2_base = ch->base;
 	u32 val;
 
 	val = readl(usb2_base + USB2_VBCTRL);
@@ -187,7 +182,7 @@ static void rcar_gen3_init_otg(struct rcar_gen3_chan *ch)
 static int rcar_gen3_phy_usb2_init(struct phy *p)
 {
 	struct rcar_gen3_chan *channel = phy_get_drvdata(p);
-	void __iomem *usb2_base = channel->usb2.base;
+	void __iomem *usb2_base = channel->base;
 
 	/* Initialize USB2 part */
 	writel(USB2_INT_ENABLE_INIT, usb2_base + USB2_INT_ENABLE);
@@ -205,7 +200,7 @@ static int rcar_gen3_phy_usb2_exit(struct phy *p)
 {
 	struct rcar_gen3_chan *channel = phy_get_drvdata(p);
 
-	writel(0, channel->usb2.base + USB2_INT_ENABLE);
+	writel(0, channel->base + USB2_INT_ENABLE);
 
 	return 0;
 }
@@ -213,7 +208,7 @@ static int rcar_gen3_phy_usb2_exit(struct phy *p)
 static int rcar_gen3_phy_usb2_power_on(struct phy *p)
 {
 	struct rcar_gen3_chan *channel = phy_get_drvdata(p);
-	void __iomem *usb2_base = channel->usb2.base;
+	void __iomem *usb2_base = channel->base;
 	u32 val;
 
 	val = readl(usb2_base + USB2_USBCTR);
@@ -235,7 +230,7 @@ static struct phy_ops rcar_gen3_phy_usb2_ops = {
 static irqreturn_t rcar_gen3_phy_usb2_irq(int irq, void *_ch)
 {
 	struct rcar_gen3_chan *ch = _ch;
-	void __iomem *usb2_base = ch->usb2.base;
+	void __iomem *usb2_base = ch->base;
 	u32 status = readl(usb2_base + USB2_OBINTSTA);
 	irqreturn_t ret = IRQ_NONE;
 
@@ -274,9 +269,9 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	channel->usb2.base = devm_ioremap_resource(dev, res);
-	if (IS_ERR(channel->usb2.base))
-		return PTR_ERR(channel->usb2.base);
+	channel->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(channel->base))
+		return PTR_ERR(channel->base);
 
 	/* call request_irq for OTG */
 	irq = platform_get_irq(pdev, 0);
-- 
1.9.1

[PATCH 2/3] phy: rcar-gen3-usb2: Add vbus-supply to handle VBUS on/off

[Yoshihiro Shimoda]

To handle the VBUS on/off by a regulator driver, this patch adds
regulator APIs calling in the driver and description about vbus-supply
in the rcar-gen3-phy-usb2.txt.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Acked-by: Rob Herring <robh@kernel.org>
---
 .../devicetree/bindings/phy/rcar-gen3-phy-usb2.txt |  2 ++
 drivers/phy/phy-rcar-gen3-usb2.c                   | 28 ++++++++++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt b/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
index 86826ca..7243b3b 100644
--- a/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
+++ b/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
@@ -21,6 +21,8 @@ To use a USB channel where USB 2.0 Host and HSUSB (USB 2.0 Peripheral) are
 combined, the device tree node should set interrupt properties to use the
 channel as USB OTG:
 - interrupts: interrupt specifier for the PHY.
+- vbus-supply: Phandle to a regulator that provides power to the VBUS. This
+	       regulator will be managed during the PHY power on/off sequence.
 
 Example (R-Car H3):
 
diff --git a/drivers/phy/phy-rcar-gen3-usb2.c b/drivers/phy/phy-rcar-gen3-usb2.c
index 3c647cd..7b14244 100644
--- a/drivers/phy/phy-rcar-gen3-usb2.c
+++ b/drivers/phy/phy-rcar-gen3-usb2.c
@@ -19,6 +19,7 @@
 #include <linux/of_address.h>
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
 
 /******* USB2.0 Host registers (original offset is +0x200) *******/
 #define USB2_INT_ENABLE		0x000
@@ -77,6 +78,7 @@
 struct rcar_gen3_chan {
 	void __iomem *base;
 	struct phy *phy;
+	struct regulator *vbus;
 	bool has_otg;
 };
 
@@ -210,6 +212,13 @@ static int rcar_gen3_phy_usb2_power_on(struct phy *p)
 	struct rcar_gen3_chan *channel = phy_get_drvdata(p);
 	void __iomem *usb2_base = channel->base;
 	u32 val;
+	int ret;
+
+	if (channel->vbus) {
+		ret = regulator_enable(channel->vbus);
+		if (ret)
+			return ret;
+	}
 
 	val = readl(usb2_base + USB2_USBCTR);
 	val |= USB2_USBCTR_PLL_RST;
@@ -220,10 +229,22 @@ static int rcar_gen3_phy_usb2_power_on(struct phy *p)
 	return 0;
 }
 
+static int rcar_gen3_phy_usb2_power_off(struct phy *p)
+{
+	struct rcar_gen3_chan *channel = phy_get_drvdata(p);
+	int ret = 0;
+
+	if (channel->vbus)
+		ret = regulator_disable(channel->vbus);
+
+	return ret;
+}
+
 static struct phy_ops rcar_gen3_phy_usb2_ops = {
 	.init		= rcar_gen3_phy_usb2_init,
 	.exit		= rcar_gen3_phy_usb2_exit,
 	.power_on	= rcar_gen3_phy_usb2_power_on,
+	.power_off	= rcar_gen3_phy_usb2_power_off,
 	.owner		= THIS_MODULE,
 };
 
@@ -290,6 +311,13 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
 		return PTR_ERR(channel->phy);
 	}
 
+	channel->vbus = devm_regulator_get_optional(dev, "vbus");
+	if (IS_ERR(channel->vbus)) {
+		if (PTR_ERR(channel->vbus) == -EPROBE_DEFER)
+			return PTR_ERR(channel->vbus);
+		channel->vbus = NULL;
+	}
+
 	phy_set_drvdata(channel->phy, channel);
 
 	provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
-- 
1.9.1

Re: [PATCH 2/3] phy: rcar-gen3-usb2: Add vbus-supply to handle VBUS on/off

[Kishon Vijay Abraham I]

Hi,

On Thursday 03 March 2016 03:39 PM, Yoshihiro Shimoda wrote:
> To handle the VBUS on/off by a regulator driver, this patch adds
> regulator APIs calling in the driver and description about vbus-supply
> in the rcar-gen3-phy-usb2.txt.
> 
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> Acked-by: Rob Herring <robh@kernel.org>
> ---
>  .../devicetree/bindings/phy/rcar-gen3-phy-usb2.txt |  2 ++
>  drivers/phy/phy-rcar-gen3-usb2.c                   | 28 ++++++++++++++++++++++
>  2 files changed, 30 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt b/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
> index 86826ca..7243b3b 100644
> --- a/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
> +++ b/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
> @@ -21,6 +21,8 @@ To use a USB channel where USB 2.0 Host and HSUSB (USB 2.0 Peripheral) are
>  combined, the device tree node should set interrupt properties to use the
>  channel as USB OTG:
>  - interrupts: interrupt specifier for the PHY.
> +- vbus-supply: Phandle to a regulator that provides power to the VBUS. This
> +	       regulator will be managed during the PHY power on/off sequence.

Why not use phy-supply from the generic PHY binding? It can then be managed by
the phy core during power_on/power_off.

Thanks
Kishon

>  
>  Example (R-Car H3):
>  
> diff --git a/drivers/phy/phy-rcar-gen3-usb2.c b/drivers/phy/phy-rcar-gen3-usb2.c
> index 3c647cd..7b14244 100644
> --- a/drivers/phy/phy-rcar-gen3-usb2.c
> +++ b/drivers/phy/phy-rcar-gen3-usb2.c
> @@ -19,6 +19,7 @@
>  #include <linux/of_address.h>
>  #include <linux/phy/phy.h>
>  #include <linux/platform_device.h>
> +#include <linux/regulator/consumer.h>
>  
>  /******* USB2.0 Host registers (original offset is +0x200) *******/
>  #define USB2_INT_ENABLE		0x000
> @@ -77,6 +78,7 @@
>  struct rcar_gen3_chan {
>  	void __iomem *base;
>  	struct phy *phy;
> +	struct regulator *vbus;
>  	bool has_otg;
>  };
>  
> @@ -210,6 +212,13 @@ static int rcar_gen3_phy_usb2_power_on(struct phy *p)
>  	struct rcar_gen3_chan *channel = phy_get_drvdata(p);
>  	void __iomem *usb2_base = channel->base;
>  	u32 val;
> +	int ret;
> +
> +	if (channel->vbus) {
> +		ret = regulator_enable(channel->vbus);
> +		if (ret)
> +			return ret;
> +	}
>  
>  	val = readl(usb2_base + USB2_USBCTR);
>  	val |= USB2_USBCTR_PLL_RST;
> @@ -220,10 +229,22 @@ static int rcar_gen3_phy_usb2_power_on(struct phy *p)
>  	return 0;
>  }
>  
> +static int rcar_gen3_phy_usb2_power_off(struct phy *p)
> +{
> +	struct rcar_gen3_chan *channel = phy_get_drvdata(p);
> +	int ret = 0;
> +
> +	if (channel->vbus)
> +		ret = regulator_disable(channel->vbus);
> +
> +	return ret;
> +}
> +
>  static struct phy_ops rcar_gen3_phy_usb2_ops = {
>  	.init		= rcar_gen3_phy_usb2_init,
>  	.exit		= rcar_gen3_phy_usb2_exit,
>  	.power_on	= rcar_gen3_phy_usb2_power_on,
> +	.power_off	= rcar_gen3_phy_usb2_power_off,
>  	.owner		= THIS_MODULE,
>  };
>  
> @@ -290,6 +311,13 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
>  		return PTR_ERR(channel->phy);
>  	}
>  
> +	channel->vbus = devm_regulator_get_optional(dev, "vbus");
> +	if (IS_ERR(channel->vbus)) {
> +		if (PTR_ERR(channel->vbus) == -EPROBE_DEFER)
> +			return PTR_ERR(channel->vbus);
> +		channel->vbus = NULL;
> +	}
> +
>  	phy_set_drvdata(channel->phy, channel);
>  
>  	provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
> 

RE: [PATCH 2/3] phy: rcar-gen3-usb2: Add vbus-supply to handle VBUS on/off

[Yoshihiro Shimoda]

Hi,

> From: Kishon Vijay Abraham I
> Sent: Tuesday, April 05, 2016 7:54 PM
> 
> Hi,
> 
> On Thursday 03 March 2016 03:39 PM, Yoshihiro Shimoda wrote:
> > To handle the VBUS on/off by a regulator driver, this patch adds
> > regulator APIs calling in the driver and description about vbus-supply
> > in the rcar-gen3-phy-usb2.txt.
> >
> > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> > Acked-by: Rob Herring <robh@kernel.org>
> > ---
> >  .../devicetree/bindings/phy/rcar-gen3-phy-usb2.txt |  2 ++
> >  drivers/phy/phy-rcar-gen3-usb2.c                   | 28 ++++++++++++++++++++++
> >  2 files changed, 30 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
> b/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
> > index 86826ca..7243b3b 100644
> > --- a/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
> > +++ b/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
> > @@ -21,6 +21,8 @@ To use a USB channel where USB 2.0 Host and HSUSB (USB 2.0 Peripheral) are
> >  combined, the device tree node should set interrupt properties to use the
> >  channel as USB OTG:
> >  - interrupts: interrupt specifier for the PHY.
> > +- vbus-supply: Phandle to a regulator that provides power to the VBUS. This
> > +	       regulator will be managed during the PHY power on/off sequence.
> 
> Why not use phy-supply from the generic PHY binding? It can then be managed by
> the phy core during power_on/power_off.

Thank you for the review!

I'm afraid, I should have added your address as CC when I sent RFC patch set.
Anyway, Rob had a comment about "phy-supply":
http://thread.gmane.org/gmane.linux.kernel.renesas-soc/366/focus=406

I agreed with Rob because the document mentioned the followings:

Optional Properties:
phy-supply:	Phandle to a regulator that provides power to the PHY. This
		regulator will be managed during the PHY power on/off sequence.

https://git.kernel.org/cgit/linux/kernel/git/kishon/linux-phy.git/tree/Documentation/devicetree/bindings/phy/phy-bindings.txt?h=next#n13

And then, I changed the "phy-supply" to "vbus-supply" and this driver managed the "vbus-supply".
Or, do I misunderstand the document?

Best regards,
Yoshihiro Shimoda

> Thanks
> Kishon
> 
> >
> >  Example (R-Car H3):
> >
> > diff --git a/drivers/phy/phy-rcar-gen3-usb2.c b/drivers/phy/phy-rcar-gen3-usb2.c
> > index 3c647cd..7b14244 100644
> > --- a/drivers/phy/phy-rcar-gen3-usb2.c
> > +++ b/drivers/phy/phy-rcar-gen3-usb2.c
> > @@ -19,6 +19,7 @@
> >  #include <linux/of_address.h>
> >  #include <linux/phy/phy.h>
> >  #include <linux/platform_device.h>
> > +#include <linux/regulator/consumer.h>
> >
> >  /******* USB2.0 Host registers (original offset is +0x200) *******/
> >  #define USB2_INT_ENABLE		0x000
> > @@ -77,6 +78,7 @@
> >  struct rcar_gen3_chan {
> >  	void __iomem *base;
> >  	struct phy *phy;
> > +	struct regulator *vbus;
> >  	bool has_otg;
> >  };
> >
> > @@ -210,6 +212,13 @@ static int rcar_gen3_phy_usb2_power_on(struct phy *p)
> >  	struct rcar_gen3_chan *channel = phy_get_drvdata(p);
> >  	void __iomem *usb2_base = channel->base;
> >  	u32 val;
> > +	int ret;
> > +
> > +	if (channel->vbus) {
> > +		ret = regulator_enable(channel->vbus);
> > +		if (ret)
> > +			return ret;
> > +	}
> >
> >  	val = readl(usb2_base + USB2_USBCTR);
> >  	val |= USB2_USBCTR_PLL_RST;
> > @@ -220,10 +229,22 @@ static int rcar_gen3_phy_usb2_power_on(struct phy *p)
> >  	return 0;
> >  }
> >
> > +static int rcar_gen3_phy_usb2_power_off(struct phy *p)
> > +{
> > +	struct rcar_gen3_chan *channel = phy_get_drvdata(p);
> > +	int ret = 0;
> > +
> > +	if (channel->vbus)
> > +		ret = regulator_disable(channel->vbus);
> > +
> > +	return ret;
> > +}
> > +
> >  static struct phy_ops rcar_gen3_phy_usb2_ops = {
> >  	.init		= rcar_gen3_phy_usb2_init,
> >  	.exit		= rcar_gen3_phy_usb2_exit,
> >  	.power_on	= rcar_gen3_phy_usb2_power_on,
> > +	.power_off	= rcar_gen3_phy_usb2_power_off,
> >  	.owner		= THIS_MODULE,
> >  };
> >
> > @@ -290,6 +311,13 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
> >  		return PTR_ERR(channel->phy);
> >  	}
> >
> > +	channel->vbus = devm_regulator_get_optional(dev, "vbus");
> > +	if (IS_ERR(channel->vbus)) {
> > +		if (PTR_ERR(channel->vbus) == -EPROBE_DEFER)
> > +			return PTR_ERR(channel->vbus);
> > +		channel->vbus = NULL;
> > +	}
> > +
> >  	phy_set_drvdata(channel->phy, channel);
> >
> >  	provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
> >

Re: [PATCH 2/3] phy: rcar-gen3-usb2: Add vbus-supply to handle VBUS on/off

[Kishon Vijay Abraham I]

Hi,

On Wednesday 06 April 2016 05:55 AM, Yoshihiro Shimoda wrote:
> Hi,
> 
>> From: Kishon Vijay Abraham I
>> Sent: Tuesday, April 05, 2016 7:54 PM
>>
>> Hi,
>>
>> On Thursday 03 March 2016 03:39 PM, Yoshihiro Shimoda wrote:
>>> To handle the VBUS on/off by a regulator driver, this patch adds
>>> regulator APIs calling in the driver and description about vbus-supply
>>> in the rcar-gen3-phy-usb2.txt.
>>>
>>> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
>>> Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
>>> ---
>>>  .../devicetree/bindings/phy/rcar-gen3-phy-usb2.txt |  2 ++
>>>  drivers/phy/phy-rcar-gen3-usb2.c                   | 28 ++++++++++++++++++++++
>>>  2 files changed, 30 insertions(+)
>>>
>>> diff --git a/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
>> b/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
>>> index 86826ca..7243b3b 100644
>>> --- a/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
>>> +++ b/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
>>> @@ -21,6 +21,8 @@ To use a USB channel where USB 2.0 Host and HSUSB (USB 2.0 Peripheral) are
>>>  combined, the device tree node should set interrupt properties to use the
>>>  channel as USB OTG:
>>>  - interrupts: interrupt specifier for the PHY.
>>> +- vbus-supply: Phandle to a regulator that provides power to the VBUS. This
>>> +	       regulator will be managed during the PHY power on/off sequence.
>>
>> Why not use phy-supply from the generic PHY binding? It can then be managed by
>> the phy core during power_on/power_off.
> 
> Thank you for the review!
> 
> I'm afraid, I should have added your address as CC when I sent RFC patch set.
> Anyway, Rob had a comment about "phy-supply":
> http://thread.gmane.org/gmane.linux.kernel.renesas-soc/366/focus=406
> 
> I agreed with Rob because the document mentioned the followings:
> 
> Optional Properties:
> phy-supply:	Phandle to a regulator that provides power to the PHY. This
> 		regulator will be managed during the PHY power on/off sequence.
> 
> https://git.kernel.org/cgit/linux/kernel/git/kishon/linux-phy.git/tree/Documentation/devicetree/bindings/phy/phy-bindings.txt?h=next#n13
> 
> And then, I changed the "phy-supply" to "vbus-supply" and this driver managed the "vbus-supply".
> Or, do I misunderstand the document?

All right. Will queue this for 4.7.

Thanks
Kishon

> 
> Best regards,
> Yoshihiro Shimoda
> 
>> Thanks
>> Kishon
>>
>>>
>>>  Example (R-Car H3):
>>>
>>> diff --git a/drivers/phy/phy-rcar-gen3-usb2.c b/drivers/phy/phy-rcar-gen3-usb2.c
>>> index 3c647cd..7b14244 100644
>>> --- a/drivers/phy/phy-rcar-gen3-usb2.c
>>> +++ b/drivers/phy/phy-rcar-gen3-usb2.c
>>> @@ -19,6 +19,7 @@
>>>  #include <linux/of_address.h>
>>>  #include <linux/phy/phy.h>
>>>  #include <linux/platform_device.h>
>>> +#include <linux/regulator/consumer.h>
>>>
>>>  /******* USB2.0 Host registers (original offset is +0x200) *******/
>>>  #define USB2_INT_ENABLE		0x000
>>> @@ -77,6 +78,7 @@
>>>  struct rcar_gen3_chan {
>>>  	void __iomem *base;
>>>  	struct phy *phy;
>>> +	struct regulator *vbus;
>>>  	bool has_otg;
>>>  };
>>>
>>> @@ -210,6 +212,13 @@ static int rcar_gen3_phy_usb2_power_on(struct phy *p)
>>>  	struct rcar_gen3_chan *channel = phy_get_drvdata(p);
>>>  	void __iomem *usb2_base = channel->base;
>>>  	u32 val;
>>> +	int ret;
>>> +
>>> +	if (channel->vbus) {
>>> +		ret = regulator_enable(channel->vbus);
>>> +		if (ret)
>>> +			return ret;
>>> +	}
>>>
>>>  	val = readl(usb2_base + USB2_USBCTR);
>>>  	val |= USB2_USBCTR_PLL_RST;
>>> @@ -220,10 +229,22 @@ static int rcar_gen3_phy_usb2_power_on(struct phy *p)
>>>  	return 0;
>>>  }
>>>
>>> +static int rcar_gen3_phy_usb2_power_off(struct phy *p)
>>> +{
>>> +	struct rcar_gen3_chan *channel = phy_get_drvdata(p);
>>> +	int ret = 0;
>>> +
>>> +	if (channel->vbus)
>>> +		ret = regulator_disable(channel->vbus);
>>> +
>>> +	return ret;
>>> +}
>>> +
>>>  static struct phy_ops rcar_gen3_phy_usb2_ops = {
>>>  	.init		= rcar_gen3_phy_usb2_init,
>>>  	.exit		= rcar_gen3_phy_usb2_exit,
>>>  	.power_on	= rcar_gen3_phy_usb2_power_on,
>>> +	.power_off	= rcar_gen3_phy_usb2_power_off,
>>>  	.owner		= THIS_MODULE,
>>>  };
>>>
>>> @@ -290,6 +311,13 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
>>>  		return PTR_ERR(channel->phy);
>>>  	}
>>>
>>> +	channel->vbus = devm_regulator_get_optional(dev, "vbus");
>>> +	if (IS_ERR(channel->vbus)) {
>>> +		if (PTR_ERR(channel->vbus) == -EPROBE_DEFER)
>>> +			return PTR_ERR(channel->vbus);
>>> +		channel->vbus = NULL;
>>> +	}
>>> +
>>>  	phy_set_drvdata(channel->phy, channel);
>>>
>>>  	provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
>>>
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[PATCH 3/3] phy: rcar-gen3-usb2: add extcon support

[Yoshihiro Shimoda]

This patch adds extcon support for otg related channel.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---
 drivers/phy/Kconfig              |  1 +
 drivers/phy/phy-rcar-gen3-usb2.c | 26 ++++++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index ba68f14..db57d6c 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -121,6 +121,7 @@ config PHY_RCAR_GEN2
 config PHY_RCAR_GEN3_USB2
 	tristate "Renesas R-Car generation 3 USB 2.0 PHY driver"
 	depends on OF && ARCH_RENESAS
+	depends on EXTCON
 	select GENERIC_PHY
 	help
 	  Support for USB 2.0 PHY found on Renesas R-Car generation 3 SoCs.
diff --git a/drivers/phy/phy-rcar-gen3-usb2.c b/drivers/phy/phy-rcar-gen3-usb2.c
index 7b14244..76bb88f 100644
--- a/drivers/phy/phy-rcar-gen3-usb2.c
+++ b/drivers/phy/phy-rcar-gen3-usb2.c
@@ -12,6 +12,7 @@
  * published by the Free Software Foundation.
  */
 
+#include <linux/extcon.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/module.h>
@@ -77,6 +78,7 @@
 
 struct rcar_gen3_chan {
 	void __iomem *base;
+	struct extcon_dev *extcon;
 	struct phy *phy;
 	struct regulator *vbus;
 	bool has_otg;
@@ -127,6 +129,9 @@ static void rcar_gen3_init_for_host(struct rcar_gen3_chan *ch)
 	rcar_gen3_set_linectrl(ch, 1, 1);
 	rcar_gen3_set_host_mode(ch, 1);
 	rcar_gen3_enable_vbus_ctrl(ch, 1);
+
+	extcon_set_cable_state_(ch->extcon, EXTCON_USB_HOST, true);
+	extcon_set_cable_state_(ch->extcon, EXTCON_USB, false);
 }
 
 static void rcar_gen3_init_for_peri(struct rcar_gen3_chan *ch)
@@ -134,6 +139,9 @@ static void rcar_gen3_init_for_peri(struct rcar_gen3_chan *ch)
 	rcar_gen3_set_linectrl(ch, 0, 1);
 	rcar_gen3_set_host_mode(ch, 0);
 	rcar_gen3_enable_vbus_ctrl(ch, 0);
+
+	extcon_set_cable_state_(ch->extcon, EXTCON_USB_HOST, false);
+	extcon_set_cable_state_(ch->extcon, EXTCON_USB, true);
 }
 
 static bool rcar_gen3_check_vbus(struct rcar_gen3_chan *ch)
@@ -272,6 +280,12 @@ static const struct of_device_id rcar_gen3_phy_usb2_match_table[] = {
 };
 MODULE_DEVICE_TABLE(of, rcar_gen3_phy_usb2_match_table);
 
+static const unsigned int rcar_gen3_phy_cable[] = {
+	EXTCON_USB,
+	EXTCON_USB_HOST,
+	EXTCON_NONE,
+};
+
 static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -297,11 +311,23 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
 	/* call request_irq for OTG */
 	irq = platform_get_irq(pdev, 0);
 	if (irq >= 0) {
+		int ret;
+
 		irq = devm_request_irq(dev, irq, rcar_gen3_phy_usb2_irq,
 				       IRQF_SHARED, dev_name(dev), channel);
 		if (irq < 0)
 			dev_err(dev, "No irq handler (%d)\n", irq);
 		channel->has_otg = true;
+		channel->extcon = devm_extcon_dev_allocate(dev,
+							rcar_gen3_phy_cable);
+		if (IS_ERR(channel->extcon))
+			return PTR_ERR(channel->extcon);
+
+		ret = devm_extcon_dev_register(dev, channel->extcon);
+		if (ret < 0) {
+			dev_err(dev, "Failed to register extcon\n");
+			return ret;
+		}
 	}
 
 	/* devm_phy_create() will call pm_runtime_enable(dev); */
-- 
1.9.1

Re: [PATCH 3/3] phy: rcar-gen3-usb2: add extcon support

[Chanwoo Choi]

Hi Yoshihiro,

On 2016년 03월 03일 19:09, Yoshihiro Shimoda wrote:
> This patch adds extcon support for otg related channel.
> 
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> ---
>  drivers/phy/Kconfig              |  1 +
>  drivers/phy/phy-rcar-gen3-usb2.c | 26 ++++++++++++++++++++++++++
>  2 files changed, 27 insertions(+)
> 
> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> index ba68f14..db57d6c 100644
> --- a/drivers/phy/Kconfig
> +++ b/drivers/phy/Kconfig
> @@ -121,6 +121,7 @@ config PHY_RCAR_GEN2
>  config PHY_RCAR_GEN3_USB2
>  	tristate "Renesas R-Car generation 3 USB 2.0 PHY driver"
>  	depends on OF && ARCH_RENESAS
> +	depends on EXTCON
>  	select GENERIC_PHY
>  	help
>  	  Support for USB 2.0 PHY found on Renesas R-Car generation 3 SoCs.
> diff --git a/drivers/phy/phy-rcar-gen3-usb2.c b/drivers/phy/phy-rcar-gen3-usb2.c
> index 7b14244..76bb88f 100644
> --- a/drivers/phy/phy-rcar-gen3-usb2.c
> +++ b/drivers/phy/phy-rcar-gen3-usb2.c
> @@ -12,6 +12,7 @@
>   * published by the Free Software Foundation.
>   */
>  
> +#include <linux/extcon.h>
>  #include <linux/interrupt.h>
>  #include <linux/io.h>
>  #include <linux/module.h>
> @@ -77,6 +78,7 @@
>  
>  struct rcar_gen3_chan {
>  	void __iomem *base;
> +	struct extcon_dev *extcon;
>  	struct phy *phy;
>  	struct regulator *vbus;
>  	bool has_otg;
> @@ -127,6 +129,9 @@ static void rcar_gen3_init_for_host(struct rcar_gen3_chan *ch)
>  	rcar_gen3_set_linectrl(ch, 1, 1);
>  	rcar_gen3_set_host_mode(ch, 1);
>  	rcar_gen3_enable_vbus_ctrl(ch, 1);
> +
> +	extcon_set_cable_state_(ch->extcon, EXTCON_USB_HOST, true);
> +	extcon_set_cable_state_(ch->extcon, EXTCON_USB, false);
>  }
>  
>  static void rcar_gen3_init_for_peri(struct rcar_gen3_chan *ch)
> @@ -134,6 +139,9 @@ static void rcar_gen3_init_for_peri(struct rcar_gen3_chan *ch)
>  	rcar_gen3_set_linectrl(ch, 0, 1);
>  	rcar_gen3_set_host_mode(ch, 0);
>  	rcar_gen3_enable_vbus_ctrl(ch, 0);
> +
> +	extcon_set_cable_state_(ch->extcon, EXTCON_USB_HOST, false);
> +	extcon_set_cable_state_(ch->extcon, EXTCON_USB, true);
>  }
>  
>  static bool rcar_gen3_check_vbus(struct rcar_gen3_chan *ch)
> @@ -272,6 +280,12 @@ static const struct of_device_id rcar_gen3_phy_usb2_match_table[] = {
>  };
>  MODULE_DEVICE_TABLE(of, rcar_gen3_phy_usb2_match_table);
>  
> +static const unsigned int rcar_gen3_phy_cable[] = {
> +	EXTCON_USB,
> +	EXTCON_USB_HOST,
> +	EXTCON_NONE,
> +};
> +
>  static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
> @@ -297,11 +311,23 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
>  	/* call request_irq for OTG */
>  	irq = platform_get_irq(pdev, 0);
>  	if (irq >= 0) {
> +		int ret;
> +
>  		irq = devm_request_irq(dev, irq, rcar_gen3_phy_usb2_irq,
>  				       IRQF_SHARED, dev_name(dev), channel);
>  		if (irq < 0)
>  			dev_err(dev, "No irq handler (%d)\n", irq);
>  		channel->has_otg = true;
> +		channel->extcon = devm_extcon_dev_allocate(dev,
> +							rcar_gen3_phy_cable);
> +		if (IS_ERR(channel->extcon))
> +			return PTR_ERR(channel->extcon);
> +
> +		ret = devm_extcon_dev_register(dev, channel->extcon);
> +		if (ret < 0) {
> +			dev_err(dev, "Failed to register extcon\n");
> +			return ret;
> +		}
>  	}
>  
>  	/* devm_phy_create() will call pm_runtime_enable(dev); */
> 

Looks good to me about extcon usgae.

Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>

Best Regards,
Chanwoo Choi

RE: [PATCH 3/3] phy: rcar-gen3-usb2: add extcon support

[Yoshihiro Shimoda]

Hi Kishon,

Would you review this patch set?
As I said on the cover letter, this patch set is based on some patches.
http://thread.gmane.org/gmane.linux.drivers.devicetree/158563


Hi Chanwoo,

Thank you very much for the review about extcon usage!

Best regards,
Yoshihiro Shimoda

> From: Chanwoo Choi [mailto:cw00.choi@samsung.com]
> Sent: Monday, March 14, 2016 12:36 PM
> 
> Hi Yoshihiro,
> 
> On 2016년 03월 03일 19:09, Yoshihiro Shimoda wrote:
> > This patch adds extcon support for otg related channel.
> >
> > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> > ---
> >  drivers/phy/Kconfig              |  1 +
> >  drivers/phy/phy-rcar-gen3-usb2.c | 26 ++++++++++++++++++++++++++
> >  2 files changed, 27 insertions(+)
> >
> > diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> > index ba68f14..db57d6c 100644
> > --- a/drivers/phy/Kconfig
> > +++ b/drivers/phy/Kconfig
> > @@ -121,6 +121,7 @@ config PHY_RCAR_GEN2
> >  config PHY_RCAR_GEN3_USB2
> >  	tristate "Renesas R-Car generation 3 USB 2.0 PHY driver"
> >  	depends on OF && ARCH_RENESAS
> > +	depends on EXTCON
> >  	select GENERIC_PHY
> >  	help
> >  	  Support for USB 2.0 PHY found on Renesas R-Car generation 3 SoCs.
> > diff --git a/drivers/phy/phy-rcar-gen3-usb2.c b/drivers/phy/phy-rcar-gen3-usb2.c
> > index 7b14244..76bb88f 100644
> > --- a/drivers/phy/phy-rcar-gen3-usb2.c
> > +++ b/drivers/phy/phy-rcar-gen3-usb2.c
> > @@ -12,6 +12,7 @@
> >   * published by the Free Software Foundation.
> >   */
> >
> > +#include <linux/extcon.h>
> >  #include <linux/interrupt.h>
> >  #include <linux/io.h>
> >  #include <linux/module.h>
> > @@ -77,6 +78,7 @@
> >
> >  struct rcar_gen3_chan {
> >  	void __iomem *base;
> > +	struct extcon_dev *extcon;
> >  	struct phy *phy;
> >  	struct regulator *vbus;
> >  	bool has_otg;
> > @@ -127,6 +129,9 @@ static void rcar_gen3_init_for_host(struct rcar_gen3_chan *ch)
> >  	rcar_gen3_set_linectrl(ch, 1, 1);
> >  	rcar_gen3_set_host_mode(ch, 1);
> >  	rcar_gen3_enable_vbus_ctrl(ch, 1);
> > +
> > +	extcon_set_cable_state_(ch->extcon, EXTCON_USB_HOST, true);
> > +	extcon_set_cable_state_(ch->extcon, EXTCON_USB, false);
> >  }
> >
> >  static void rcar_gen3_init_for_peri(struct rcar_gen3_chan *ch)
> > @@ -134,6 +139,9 @@ static void rcar_gen3_init_for_peri(struct rcar_gen3_chan *ch)
> >  	rcar_gen3_set_linectrl(ch, 0, 1);
> >  	rcar_gen3_set_host_mode(ch, 0);
> >  	rcar_gen3_enable_vbus_ctrl(ch, 0);
> > +
> > +	extcon_set_cable_state_(ch->extcon, EXTCON_USB_HOST, false);
> > +	extcon_set_cable_state_(ch->extcon, EXTCON_USB, true);
> >  }
> >
> >  static bool rcar_gen3_check_vbus(struct rcar_gen3_chan *ch)
> > @@ -272,6 +280,12 @@ static const struct of_device_id rcar_gen3_phy_usb2_match_table[] = {
> >  };
> >  MODULE_DEVICE_TABLE(of, rcar_gen3_phy_usb2_match_table);
> >
> > +static const unsigned int rcar_gen3_phy_cable[] = {
> > +	EXTCON_USB,
> > +	EXTCON_USB_HOST,
> > +	EXTCON_NONE,
> > +};
> > +
> >  static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
> >  {
> >  	struct device *dev = &pdev->dev;
> > @@ -297,11 +311,23 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
> >  	/* call request_irq for OTG */
> >  	irq = platform_get_irq(pdev, 0);
> >  	if (irq >= 0) {
> > +		int ret;
> > +
> >  		irq = devm_request_irq(dev, irq, rcar_gen3_phy_usb2_irq,
> >  				       IRQF_SHARED, dev_name(dev), channel);
> >  		if (irq < 0)
> >  			dev_err(dev, "No irq handler (%d)\n", irq);
> >  		channel->has_otg = true;
> > +		channel->extcon = devm_extcon_dev_allocate(dev,
> > +							rcar_gen3_phy_cable);
> > +		if (IS_ERR(channel->extcon))
> > +			return PTR_ERR(channel->extcon);
> > +
> > +		ret = devm_extcon_dev_register(dev, channel->extcon);
> > +		if (ret < 0) {
> > +			dev_err(dev, "Failed to register extcon\n");
> > +			return ret;
> > +		}
> >  	}
> >
> >  	/* devm_phy_create() will call pm_runtime_enable(dev); */
> >
> 
> Looks good to me about extcon usgae.
> 
> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
> 
> Best Regards,
> Chanwoo Choi

Re: [PATCH 0/3] phy: rcar-gen3-usb2: add vbus-supply and extcon

[Kishon Vijay Abraham I]

On Thursday 03 March 2016 03:39 PM, Yoshihiro Shimoda wrote:
> This patch set is based on the latest linux-phy / next branch
> (commit id = 89636adde4a05953e3bf18807ba1f6f205572f67)
> and the following patches:
> 
> http://thread.gmane.org/gmane.linux.kernel/2166364
> http://thread.gmane.org/gmane.linux.kernel.renesas-soc/1512/focus=1514
> 
> The patch "Add vbus-supply to handle VBUS on/off" has
> Rob's Acked-by as the followings:
> http://thread.gmane.org/gmane.linux.kernel.renesas-soc/1087/focus=1153

merged, thanks.

-Kishon
> 
> Yoshihiro Shimoda (3):
>   phy: rcar-gen3-usb2: remove unnecesary struct rcar_gen3_data
>   phy: rcar-gen3-usb2: Add vbus-supply to handle VBUS on/off
>   phy: rcar-gen3-usb2: add extcon support
> 
>  .../devicetree/bindings/phy/rcar-gen3-phy-usb2.txt |  2 +
>  drivers/phy/Kconfig                                |  1 +
>  drivers/phy/phy-rcar-gen3-usb2.c                   | 87 +++++++++++++++++-----
>  3 files changed, 71 insertions(+), 19 deletions(-)
>