5 Aug
2010
5 Aug
'10
1:10 p.m.
On Wed, Aug 04, 2010 at 03:04:24PM -0500, Timur Tabi wrote:
Add code that programs the DMA and SSI controllers differently based on the FIFO depth of the SSI.
The SSI devices on the MPC8610 and the P1022 are identical in every way except one: the transmit and receive FIFO depth. On the MPC8610, the depth is eight. On the P1022, it's fifteen. The device tree nodes for the SSI include a "fsl,fifo-depth" property that specifies the FIFO depth.
My first thought with this is that it's not something I'd expect to be in the device tree at all - it looks like it's all properties of the silicon which I'd expect the drivers to be able to figure out for themselves without needing to be told by the device tree.