22 Apr
2020
22 Apr
'20
3:37 p.m.
Hi Bin,
On 22.04.2020 08:00, Bin Meng wrote:
On Wed, Apr 22, 2020 at 12:51 AM Sylwester Nawrocki s.nawrocki@samsung.com wrote:
[...]
So far I couldn't come up with anything better to make the xHCI host controller working on the rpi4 board. For some reason dereferencing a 64-bit pointer to access 64-bit registers doesn't work there, might be a limitation of the PCIe bridge behind the SCB. In Linux always 2 double word accesses are used.
If Linux always uses 2 double word accesses, let's simply do the same in U-Boot by removing the readq/writeq.
Thanks for your review. That sounds good to me, I will do it that way in next iteration.
-- Regards, Sylwester