Hi, On Thu, Apr 04, 2019 at 06:21:09PM +0200, Miquel Raynal wrote: > The A33 NAND controller is slightly different than the A10+ ones, > eg. DMA handling is a bit different and a few register offsets > changed. > > Introduce a new compatible to represent this version of the IP. > > Also append '-controller' to the new compatible (which is required for > new compatibles) as this is describing a NAND controller and not a > NAND chip. Out of curiosity, why are you requiring that suffix now? > Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx> > --- > Documentation/devicetree/bindings/mtd/sunxi-nand.txt | 7 ++++++- > 1 file changed, 6 insertions(+), 1 deletion(-) > > diff --git a/Documentation/devicetree/bindings/mtd/sunxi-nand.txt b/Documentation/devicetree/bindings/mtd/sunxi-nand.txt > index dcd5a5d80dc0..6128d41d8c59 100644 > --- a/Documentation/devicetree/bindings/mtd/sunxi-nand.txt > +++ b/Documentation/devicetree/bindings/mtd/sunxi-nand.txt > @@ -1,7 +1,12 @@ > Allwinner NAND Flash Controller (NFC) > > Required properties: > -- compatible : "allwinner,sun4i-a10-nand". > +- compatible : Must be one of: > + - "allwinner,sun4i-a10-nand" > + - "allwinner,sun8i-a33-nand-controller" > + The former may be used by all IPs, however sun8i family > + will need the second one in order to make use of the > + internal DMA capabilities. I'm not sure we should have that statement. We have no idea whether or not this can be used by all IPs *today*, and we surely don't know about the one that are going to come out. Maxime -- Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
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