Re: [RFC PATCH v3 2/5] Documentation: synopsys-dw-mshc: add bindings for idmac and edmac
From: Doug Anderson <dianders@chromium.org>
Date: 2015-08-06 02:16:07
Also in:
linux-mips, linux-mmc, linux-rockchip, linux-samsung-soc
Shawn, On Wed, Aug 5, 2015 at 1:17 AM, Shawn Lin [off-list ref] wrote:
synopsys-dw-mshc supports three types of transfer mode. We add bindings and description for how to use them at runtime. Without idmac and edmac property, pio is the default transfer mode. Make sure that Idmac and emdac should not be used simultaneously.
Can't you just read the HCON register? [17:16]: DMA_INTERFACE 00: none 01: DW_DMA 10: GENERIC_DMA 11: NON-DW-DMA