[PATCH v4 5/7] PCI: spacemit: introduce SpacemiT PCIe host driver

[Alex Elder]

On 10/30/25 6:08 PM, Bjorn Helgaas wrote:
> In subject, capitalize "introduce" to match history.  Or you could
> just use "Add ...", which has the advantage of being shorter.

OK.  I'll capitalize all of them in this series.

> On Thu, Oct 30, 2025 at 05:02:56PM -0500, Alex Elder wrote:
>> Introduce a driver for the PCIe host controller found in the SpacemiT
>> K1 SoC.  The hardware is derived from the Synopsys DesignWare PCIe IP.
>> The driver supports three PCIe ports that operate at PCIe gen2 transfer
>> rates (5 GT/sec).  The first port uses a combo PHY, which may be
>> configured for use for USB 3 instead.
>> ...
> 
> I guess this doesn't support INTx interrupts at all?

It can, but I removed that support first to simplify the task
of converting the original code, and second because I had no way
to test it.  I planned for it to be added at a future date.

>> +++ b/drivers/pci/controller/dwc/Kconfig
>> @@ -509,6 +509,17 @@ config PCI_KEYSTONE_EP
>>   	  on DesignWare hardware and therefore the driver re-uses the
>>   	  DesignWare core functions to implement the driver.
>>   
>> +config PCIE_SPACEMIT_K1
>> +	tristate "SpacemiT K1 PCIe controller (host mode)"
> 
> Move this to keep the menu items alphabetized by vendor.

OK.  I was going by Kconfig option name, but now I see
what you mean.

I'll put it between PCIE_SOPHGO_DW and PCIE_SPEAR13XX.

>> +	depends on ARCH_SPACEMIT || COMPILE_TEST
>> +	depends on PCI && OF && HAS_IOMEM
> 
> I don't think you need PCI or OF.

You're right.  PCI for sure, but it doesn't look like I make
an direct OF calls either.  I'll drop them both.

>> +	select PCIE_DW_HOST
>> +	select PCI_PWRCTRL_SLOT
>> +	default ARCH_SPACEMIT
>> +	help
>> +	  Enables support for the PCIe controller in the K1 SoC operating
>> +	  in host mode.
> 
> Most help text includes both the vendor and the product line names.
I guess I didn't include "SpacemiT".  I'll add that, and will try
to come up with a few more words in the description.

Thanks for your quick response.

					-Alex