21 Sep
2018
21 Sep
'18
11:15 a.m.
On 21.09.2018, at 10:59, Heiko Stuebner heiko@sntech.de wrote:
The dwmmc controllers on rk3188 do not have idma support, so need to use the fifo-mode and it my tests they became confused and stopped working if the frequency was to high.
While I only tested in somewhat bigger steps, 32MHz for example hung the controller, while reducing it to 16MHz worked just fine and is reasonably fast to load a kernel from mmc.
Signed-off-by: Heiko Stuebner heiko@sntech.de
Reviewed-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com Acked-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com