Re: [PATCH v2 -next 07/11] PCI: brcmstb: Avoid turn off of bridge reset

[Stanimir Varbanov]

On 9/10/24 20:03, Florian Fainelli wrote:
> On 9/10/24 08:18, Stanimir Varbanov wrote:
>> On brcm_pcie_turn_off avoid shutdown of bridge reset.
>>
>> Signed-off-by: Stanimir Varbanov <svarbanov@xxxxxxx>
>> ---
>>   drivers/pci/controller/pcie-brcmstb.c | 14 ++++++++++++--
>>   1 file changed, 12 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/pci/controller/pcie-brcmstb.c
>> b/drivers/pci/controller/pcie-brcmstb.c
>> index d78f33b33884..185ccf7fe86a 100644
>> --- a/drivers/pci/controller/pcie-brcmstb.c
>> +++ b/drivers/pci/controller/pcie-brcmstb.c
>> @@ -234,10 +234,17 @@ struct inbound_win {
>>       u64 cpu_addr;
>>   };
>>   +/*
>> + * Shutting down this bridge on pcie1 means accesses to rescal block
>> + * will hang the chip if another RC wants to assert/deassert rescal.
>> + */
> 
> Maybe a slightly more detailed comment saying that 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 space,
> and depending upon the bus fabric we may get a timeout (UBUS/GISB), or a
> hang (AXI).

Ack. Thank you!

regards,
~Stan