linux-kernel - Re: [PATCH v10 09/14] usb: of: add an API to get OTG device from USB controller node

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Date:	Mon, 13 Jun 2016 11:16:38 +0300
From:	Roger Quadros <rogerq@...com>
To:	Jun Li <jun.li@....com>,
	"peter.chen@...escale.com" <peter.chen@...escale.com>
CC:	"balbi@...nel.org" <balbi@...nel.org>,
	"tony@...mide.com" <tony@...mide.com>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"dan.j.williams@...el.com" <dan.j.williams@...el.com>,
	"mathias.nyman@...ux.intel.com" <mathias.nyman@...ux.intel.com>,
	"Joao.Pinto@...opsys.com" <Joao.Pinto@...opsys.com>,
	"sergei.shtylyov@...entembedded.com" 
	<sergei.shtylyov@...entembedded.com>,
	"jun.li@...escale.com" <jun.li@...escale.com>,
	"grygorii.strashko@...com" <grygorii.strashko@...com>,
	"yoshihiro.shimoda.uh@...esas.com" <yoshihiro.shimoda.uh@...esas.com>,
	"robh@...nel.org" <robh@...nel.org>,
	"nsekhar@...com" <nsekhar@...com>, "b-liu@...com" <b-liu@...com>,
	"joe@...ches.com" <joe@...ches.com>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH v10 09/14] usb: of: add an API to get OTG device from USB
 controller node

On 13/06/16 11:13, Jun Li wrote:
> Hi
> 
>> diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c
>> index e3d0161..d7ec471 100644
>> --- a/drivers/usb/common/common.c
>> +++ b/drivers/usb/common/common.c
>> @@ -238,6 +238,33 @@ int of_usb_update_otg_caps(struct device_node *np,  }
>> EXPORT_SYMBOL_GPL(of_usb_update_otg_caps);
>>
>> +#ifdef CONFIG_USB_OTG
>> +/**
>> + * of_usb_get_otg - get the OTG controller linked to the USB controller
>> + * @np: Pointer to the device_node of the USB controller
>> + * @otg_caps: Pointer to the target usb_otg_caps to be set
> 
> Remove otg_caps.

Sure.

> 
>> + *
>> + * Returns the OTG controller device or NULL on error.
>> + */
>> +struct device *of_usb_get_otg(struct device_node *np) {
>> +	struct device_node *otg_np;
>> +	struct platform_device *pdev;
>> +
>> +	otg_np = of_parse_phandle(np, "otg-controller", 0);
>> +	if (!otg_np)
>> +		return NULL;
>> +
>> +	pdev = of_find_device_by_node(otg_np);
>> +	of_node_put(otg_np);
>> +	if (!pdev)
>> +		return NULL;
>> +
>> +	return &pdev->dev;
>> +}
>> +EXPORT_SYMBOL_GPL(of_usb_get_otg);
>> +#endif
>> +
>>  #endif
>>
>>  MODULE_LICENSE("GPL");
>> diff --git a/include/linux/usb/of.h b/include/linux/usb/of.h index
>> de3237f..499a4e8 100644
>> --- a/include/linux/usb/of.h
>> +++ b/include/linux/usb/of.h
>> @@ -40,6 +40,15 @@ static inline struct device_node
>> *usb_of_get_child_node  }  #endif
>>
>> +#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_USB_OTG) struct device
>> +*of_usb_get_otg(struct device_node *np); #else static inline struct
>> +device *of_usb_get_otg(struct device_node *np) {
>> +	return NULL;
>> +}
>> +#endif
>> +
>>  #if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_USB_SUPPORT)  enum
>> usb_phy_interface of_usb_get_phy_mode(struct device_node *np);  #else
>> --
>> 2.7.4
> 

--
cheers,
-roger