Re: [PATCH v5 2/2] PCI: brcmstb: Use reset/rearm instead of deassert/assert

Florian Fainelli
2021-03-29T17:02:36Z

On 3/29/21 9:58 AM, Lorenzo Pieralisi wrote:
> On Mon, Mar 29, 2021 at 09:50:13AM -0700, Florian Fainelli wrote:
>> On 3/29/21 9:10 AM, Lorenzo Pieralisi wrote:
>>> On Fri, Mar 12, 2021 at 03:45:55PM -0500, Jim Quinlan wrote:
>>>> The Broadcom STB PCIe RC uses a reset control "rescal" for certain chips.
>>>> The "rescal" implements a "pulse reset" so using assert/deassert is wrong
>>>> for this device. Instead, we use reset/rearm. We need to use rearm so
>>>> that we can reset it after a suspend/resume cycle; w/o using "rearm", the
>>>> "rescal" device will only ever fire once.
>>>>
>>>> Of course for suspend/resume to work we also need to put the reset/rearm
>>>> calls in the suspend and resume routines.
>>>
>>> Actually - I am sorry but it looks like you will have to split the patch
>>> in two since this is two logical changes.
>>
>> I do not believe this can be easily split, since there is currently a
>> misused of the reset controller API and this patch fixes all call sites
>> at once. It would not really make sense to fix probe/remove and then
>> leave suspend/resume broken in the same manner.
>
> Right - I was reading the previous versions of the set, it makes sense
> to keep it in one logical change.
>
> Do you want me to take it or you prefer an ACK so that it can go via
> a different tree ?

I would be comfortable with you taking this via the PCI driver trees, we
would want an Ack from Jens that he is okay with taking the ahci_brcm.c
change as well through your tree.

Thank you!
--
Florian