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, 09 Jul 2019 09:29:41 +0300
From:   Felipe Balbi <felipe.balbi@...ux.intel.com>
To:     Pawel Laszczak <pawell@...ence.com>
Cc:     "gregkh\@linuxfoundation.org" <gregkh@...uxfoundation.org>,
        "linux-usb\@vger.kernel.org" <linux-usb@...r.kernel.org>,
        "rogerq\@ti.com" <rogerq@...com>,
        "linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
        "jbergsagel\@ti.com" <jbergsagel@...com>,
        "nsekhar\@ti.com" <nsekhar@...com>, "nm\@ti.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,

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 ?

Run a few tens of randconfig builds and see if you ever catch any
problem. I think randconfig can produce a defconfig where USB=n
USB_GADGET=n and USB_COMMON=y.

-- 
balbi