linux-kernel - RE: [PATCH 1/3] usb: common: Add usb_get_dr_mode_from_string and usb_dr_mode_to

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Date:   Tue, 9 Jul 2019 06:23:59 +0000
From:   Pawel Laszczak <pawell@...ence.com>
To:     Felipe Balbi <felipe.balbi@...ux.intel.com>
CC:     "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "rogerq@...com" <rogerq@...com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "jbergsagel@...com" <jbergsagel@...com>,
        "nsekhar@...com" <nsekhar@...com>, "nm@...com" <nm@...com>,
        Suresh Punnoose <sureshp@...ence.com>,
        Jayshri Dajiram Pawar <jpawar@...ence.com>,
        Rahul Kumar <kurahul@...ence.com>,
        Anil Joy Varughese <aniljoy@...ence.com>
Subject: RE: [PATCH 1/3] usb: common: Add usb_get_dr_mode_from_string and
 usb_dr_mode_to_string.

Hi,
>
>Hi,
>
>Pawel Laszczak <pawell@...ence.com> writes:
>> diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
>> index 69f1b6328532..c156817672c4 100644
>> --- a/include/linux/usb/otg.h
>> +++ b/include/linux/usb/otg.h
>> @@ -129,4 +129,20 @@ enum usb_dr_mode {
>>   */
>>  extern enum usb_dr_mode usb_get_dr_mode(struct device *dev);
>>
>> +/**
>> + * usb_get_dr_mode_from_string - Convert string to dual role mode.
>> + * @str: Pointer to the given string
>> + *
>> + * The function gets string and returns the correspondig enum usb_dr_mode.
>> + */
>> +extern enum usb_dr_mode usb_get_dr_mode_from_string(const char *str);
>> +
>> +/**
>> + * usb_dr_mode_to_string - Convert dual role mode to string.
>> + * @dr_mode: Pointer to the given dual role mode
>> + *
>> + * The function gets enum usb_dr_mode, and returns the correspondig string.
>> + */
>> +extern const char *usb_dr_mode_to_string(const enum usb_dr_mode dr_mode);
>> +
>>  #endif /* __LINUX_USB_OTG_H */
>
>Still missing the stubs I mentioned. Did you try compiling with and
>without common enabled?
>
Sorry, I thought that I send answer yesterday but it's look like I prepared the answer but 
I  forgot to send. 

In /drivers/usb/Kconfig we have: 

config USB
	tristate "Support for Host-side USB"
	depends on USB_ARCH_HAS_HCD
	select USB_COMMON

and in /drivers/usb/gadget/Kconfig we have:

menuconfig USB_GADGET
	tristate "USB Gadget Support"
	select USB_COMMON

I think that it should cover all cases. 

Am I right ?

Pawel

>--
>balbi