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

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Date:	Tue, 5 Apr 2016 09:56:28 +0000
From:	Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
To:	"kishon@...com" <kishon@...com>,
	Chanwoo Choi <cw00.choi@...sung.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-renesas-soc@...r.kernel.org" 
	<linux-renesas-soc@...r.kernel.org>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"pawel.moll@....com" <pawel.moll@....com>,
	"mark.rutland@....com" <mark.rutland@....com>,
	"ijc+devicetree@...lion.org.uk" <ijc+devicetree@...lion.org.uk>,
	"galak@...eaurora.org" <galak@...eaurora.org>
Subject: RE: [PATCH 3/3] phy: rcar-gen3-usb2: add extcon support

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@...sung.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@...esas.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@...sung.com>
> 
> Best Regards,
> Chanwoo Choi