[PATCH] usb: musb-new: Extend Allwinner quirk to newer SoCs

[Marek Vasut]

On 4/27/21 10:10 AM, Andre Przywara wrote:
> On Tue, 27 Apr 2021 02:37:20 +0200
> Marek Vasut <marex at denx.de> wrote:
> 
> Hi,
> 
>> On 4/27/21 2:03 AM, Andre Przywara wrote:
>>> As the comment in musb_regs.h describes, Allwinner saves the
>>> MUSB_CONFIGDATA register, which always return 0 on those SoCs.
>>>
>>> This is also true for the H6 and H616, so extend the quirk to those
>>> controllers as well.
>>>
>>> This fixes USB peripheral mode on H6 and H616 boards.
>>>
>>> Signed-off-by: Andre Przywara <andre.przywara at arm.com>
>>> ---
>>>    drivers/usb/musb-new/musb_regs.h | 3 ++-
>>>    1 file changed, 2 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/usb/musb-new/musb_regs.h b/drivers/usb/musb-new/musb_regs.h
>>> index c4d7203b851..bee1b715a95 100644
>>> --- a/drivers/usb/musb-new/musb_regs.h
>>> +++ b/drivers/usb/musb-new/musb_regs.h
>>> @@ -432,7 +432,8 @@ static inline u8 musb_read_ulpi_buscontrol(void __iomem *mbase)
>>>    static inline u8 musb_read_configdata(void __iomem *mbase)
>>>    {
>>>    #if defined CONFIG_MACH_SUN8I_A33 || defined CONFIG_MACH_SUN8I_A83T || \
>>> -		defined CONFIG_MACH_SUNXI_H3_H5 || defined CONFIG_MACH_SUN50I
>>> +	defined CONFIG_MACH_SUNXI_H3_H5 || defined CONFIG_MACH_SUN50I || \
>>> +	defined CONFIG_SUN50I_GEN_H6
>>
>> Isn't there some better solution then ever-growing list of macros to
>> check, like e.g. a single CONFIG_MACH_SUNXI ?
> 
> I was wondering the same, but I think this does not apply to the older
> SoCs (we use ARCH_SUNXI in the two functions above and below, so I
> guess the differentiation here is deliberate). I will test this later.
> 
> So we could probably use the quirk also for the older, working(?) SoCs,
> but I am not sure we should do that. CONFIG_SUN50I_GEN_H6 is already a
> symbol covering multiple SoCs, so ideally we won't need to add many
> more.
> I can have a look if we have other checks like that in the code, then
> maybe define a collective symbol for newer SoCs?

Yes please