[PATCH v3 1/6] PCI: rockchip: Create individual folder for rockchip drivers

[Shawn Lin]

Dear Bjorn, Lorenzo

On 2018/3/21 1:46, Bjorn Helgaas wrote:
> On Tue, Mar 06, 2018 at 10:43:22AM +0800, Shawn Lin wrote:
>> In preparation for introducing End-Point driver for Rockchip
>> PCIe controller, we create a new folder to follow the convention
>> of dwc and cadence. Then we rename the host driver from pcie-rockchip.c
>> to pcie-rockchip-host.c, and only leave some common functions in
>> pcie-rockchip.c in order to be reused for both of host and EP drivers.
>>
>> Signed-off-by: Shawn Lin <shawn.lin at rock-chips.com>
>> Tested-by: Jeffy Chen <jeffy.chen at rock-chips.com>
>> ...
> 
>> diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
>> index 34b56a8..b85ad40 100644
>> --- a/drivers/pci/Kconfig
>> +++ b/drivers/pci/Kconfig
>> @@ -141,4 +141,5 @@ source "drivers/pci/cadence/Kconfig"
>>   source "drivers/pci/dwc/Kconfig"
>>   source "drivers/pci/host/Kconfig"
>>   source "drivers/pci/endpoint/Kconfig"
>> +source "drivers/pci/rockchip/Kconfig"
>>   source "drivers/pci/switch/Kconfig"
> 
> Why is this out of order?  This seems exactly analogous to
> drivers/pci/cadence and dwc, so they should be next to each other.

This confused me as well! I just put "rockchip" before "switch"
to keep the order, but I didn't know why "endpoint" wasn't ordered.

> 
>> diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
>> index 9419709..8434afb 100644
>> --- a/drivers/pci/Makefile
>> +++ b/drivers/pci/Makefile
>> @@ -55,6 +55,8 @@ obj-y += switch/
>>   
>>   obj-$(CONFIG_PCI_ENDPOINT)	+= endpoint/
>>   
>> +obj-$(CONFIG_PCIE_ROCKCHIP)	+= rockchip/
>> +
>>   # Endpoint library must be initialized before its users
>>   obj-$(CONFIG_PCIE_CADENCE)	+= cadence/
>>   # pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW
> 
> Similarly here.
> 
> I admit to still being a little dubious about the idea of a bunch of
> vendor-specific directories, each containing a completely trivial
> Makefile, a mostly-trivial Kconfig, a header file, a shared .c file, a
> host .c file, and an endpoint .c file.

So do I.

> 
> One alternative would be to keep the single pcie-rockchip.c file with
> an #ifdef CONFIG_PCIE_ROCKCHIP_HOST section and an #ifdef
> CONFIG_PCIE_ROCKCHIP_EP section.

I admit I thought this eariler, however, I don't like it personally, as
it confuses the new-comer to follow the convention here, if we are
alternatives just for "style issue" or "personal taste".

Certainly, I could do that beased on your suggestion, but I would like
to know if this's the final agreement both you and Lorenzo reached. :)

> 
> Bjorn
> 
> 
>