Re: [PATCH v3 06/11] PCI: brcmstb: Avoid turn off of bridge reset

Stanimir Varbanov
2024-10-17T08:10:56Z

Hi Jim,

On 10/16/24 20:17, Jim Quinlan wrote:
> On Mon, Oct 14, 2024 at 9:07 AM Stanimir Varbanov <svarbanov@suse.de> wrote:
>>
>> On PCIe turn off avoid shutdown of bridge reset,
>> by introducing a quirk flag.
>>
>> Signed-off-by: Stanimir Varbanov <svarbanov@suse.de>
>> ---
>> v2 -> v3:
>> - Added more descriptive comment on CFG_QUIRK_AVOID_BRIDGE_SHUTDOWN quirk.
>>
>> drivers/pci/controller/pcie-brcmstb.c | 17 +++++++++++++++--
>> 1 file changed, 15 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
>> index b76c16287f37..757a1646d53c 100644
>> --- a/drivers/pci/controller/pcie-brcmstb.c
>> +++ b/drivers/pci/controller/pcie-brcmstb.c
>> @@ -234,10 +234,20 @@ struct inbound_win {
>> u64 cpu_addr;
>> };
>>
>> +/*
>> + * The RESCAL block is tied to PCIe controller #1, regardless of the number of
>> + * controllers, and turning off PCIe controller #1 prevents access to the RESCAL
>> + * register blocks, therefore not other controller can access this register
>
> s/no/not/
>
> I assume that the quirks is specific to 2712 as the 7712 does not need
> this since it only has PCIe1
> (I'll probably seethis as I read more of your commits).

Yes, the .post_setup op is implemented for 2712 only. Look into next
patch in the series.

~Stan