Re: Sharing PCIE driver between Microblaze and Arm zynq

[Michal Simek]

On 12/07/2012 02:17 PM, Grant Likely wrote:
> On Thu, 6 Dec 2012 15:23:14 +0100, Michal Simek <michal.simek@xxxxxxxxxx> wrote:
> > Hi guys,
> >
> > I have a question regarding to sharing generic OF pcie driver between
> > two architectures MB and ARM Zynq.
> > Is drivers/pci/pcie location good for it?
> > Make no sense to have the same driver in two locations.
> > Is using readl/writel IO functions in this driver the best option
> > which we can have?
> > Or is there any other recommendation?

Grant: What do you think about readl/iowrite usage in connection to PCI?

> > Also just want to check if it is correct to use pcie device_type.
> > The rest should be the same with pci description:
> > (http://devicetree.org/MPC5200:PCI#PCI_Address_Translation).
>
> Yes. device_type may be deprecated, but the PCI binding predates that.

If it is deprecated, there could be probably problem with early_init_dt_scan_memory()
which is checking memory device_type (drivers/of/fdt.c).


> PowerPC uses pcie in the device type. arch/powerpc/kernel/of_platform.c

ok. I see.

> Some of that powerpc DT PCI support code really should be made generic.

yep.

Thanks,
Michal


--
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/