? 2013?07?02? 17:56, Mark Rutland ??:

On Tue, Jul 02, 2013 at 07:30:26AM +0100, Huang Shijie wrote:

quoted

quoted

 The imx6 uart can supports the DMA, imx uart driver has added a new
 compatible property for the imx6 uart.
 
 In order to enable the DMA for some uart port in imx6, we rename the
 uart's compatible property to "fsl,imx6-uart".

Doesn't this change break using these dts with an older kernel? You

is it reasonable to use a new dts with an old kernel?

remove the "fsl,imx21-uart" string older kernels understand.

Given you already had "fsl,imx6q-uart" and "fsl,imx6sl-uart" strings,
would it not have made more sense to just add these to the driver?

I think it's not a good idea.

Shawn, what's your opinion about this?

thanks
Huang Shijie