[RFC PATCH 4/9] rpi4: add a mapping for the PCIe XHCI controller MMIO registers (ARM 64bit)

[Nicolas Saenz Julienne]

Hi Sylwester,

On Tue, 2020-04-21 at 18:50 +0200, Sylwester Nawrocki wrote:
> From: Marek Szyprowski <m.szyprowski at samsung.com>
> 
> Create a non-cacheable mapping for the 0x600000000 physical memory region,
> where MMIO registers for the PCIe XHCI controller are instantiated by the
> PCIe bridge.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
> ---
>  arch/arm/mach-bcm283x/init.c | 18 +++++++++++++++---
>  1 file changed, 15 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm/mach-bcm283x/init.c b/arch/arm/mach-bcm283x/init.c
> index 4295356..6a748da 100644
> --- a/arch/arm/mach-bcm283x/init.c
> +++ b/arch/arm/mach-bcm283x/init.c
> @@ -11,10 +11,15 @@
>  #include <dm/device.h>
>  #include <fdt_support.h>
>  
> +#define BCM2711_RPI4_PCIE_XHCI_MMIO_PHYS	0x600000000UL
> +#define BCM2711_RPI4_PCIE_XHCI_MMIO_SIZE	0x800000UL

Where did you got this size from? I read from the Linux device tree the
following:

	pcie0: pcie at 7d500000 {
		compatible = "brcm,bcm2711-pcie";
		[...]
		ranges = <0x02000000 0x0 0xf8000000 0x6 0x00000000
			  0x0 0x04000000>;
		[...]
	};

Shouldn't the size be 0x4000000 then?

Other than that the patch looks good to me.

Regards,
Nicolas

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