[PATCH] USB OTG: make dwc2 otg driver dependent on Exynos platform

[Quentin Schulz]

On 8/5/25 1:44 PM, Marius Dinu wrote:
> On Mon, 2025-08-04 14.42.11 ++0200, Jonas Karlman wrote:
>> Hi Marius,
>>
>> On 8/4/2025 11:43 AM, Marius Dinu wrote:
>>> drivers/usb/gadget/dwc2_udc_otg_phy.c uses s5p_cpu_id,
>>> which is only defined for Exynos CPUs.
>>>
>>> Signed-off-by: Marius Dinu <m95d+git at psihoexpert.ro>
>>> ---
>>>   drivers/usb/gadget/Kconfig | 3 ++-
>>>   1 file changed, 2 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
>>> index 46a83141481..deabcb3e51f 100644
>>> --- a/drivers/usb/gadget/Kconfig
>>> +++ b/drivers/usb/gadget/Kconfig
>>> @@ -108,10 +108,11 @@ config USB_GADGET_AT91
>>>   
>>>   config USB_GADGET_DWC2_OTG
>>>   	bool "DesignWare USB2.0 HS OTG controller (gadget mode)"
>>> +	depends on ARCH_EXYNOS5
>>
>> There are other platforms using this driver not just exynos.
>>
>> You should probably change
>>
>>    if (s5p_cpu_id == 0x4412)
>>
>> into something like
>>
>>    if (IS_ENABLED(CONFIG_ARCH_EXYNOS5) && s5p_cpu_id == 0x4412)
>>
>> instead of breaking use of this driver for other platforms.
>>
>> Regards,
>> Jonas
>>
>>>   	select USB_GADGET_DUALSPEED
>>>   	help
>>>   	  The Designware USB2.0 high-speed gadget controller
>>> -	  integrated into many SoCs. Select this option if you want the
>>> +	  integrated into many Exynos SoCs. Select this option if you want the
>>>   	  driver to operate in Peripheral mode. This option requires
>>>   	  USB_GADGET to be enabled.
>>>   
>>
> 
> I'm sorry. I'm unable to fix this driver. My C skills are not that good.
> I didn't even know this was a bug.
> 
> BTW, what's the difference between IS_ENABLED(CONFIG_something) and
> CONFIG_IS_ENABLED(something) ? I saw both variants.
> 

https://docs.u-boot.org/en/latest/develop/codingstyle.html#conditional-compilation