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

[Roger Quadros]

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