Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> writes:
> [ text/plain ]
> This patch fixes an issue that cannot work if R-Car Gen2/3 run on
> above 4GB physical memory environment to use a quirk XHCI_CLEAR_AC64.
>
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
> ---
> drivers/usb/host/xhci-plat.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
> index 5c15e9b..4dbd56f 100644
> --- a/drivers/usb/host/xhci-plat.c
> +++ b/drivers/usb/host/xhci-plat.c
> @@ -39,12 +39,19 @@ static const struct xhci_driver_overrides xhci_plat_overrides __initconst = {
>
> static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
> {
> + struct usb_hcd *hcd = xhci_to_hcd(xhci);
> +
> /*
> * As of now platform drivers don't provide MSI support so we ensure
> * here that the generic code does not try to make a pci_dev from our
> * dev struct in order to setup MSI
> */
> xhci->quirks |= XHCI_PLAT;
> +
> + /* Please refer to the xhci.c about the detail of this quirk */
this is an odd comment. It should be okay to state here that RCAR
GEN2/GEN3 lack proper 64BIT support even though register says otherwise.
--
balbi
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