Thread (10 messages) 10 messages, 4 authors, 2017-08-13

[RESEND PATCH 2/4] dt-bindings: add "reduced-width" property for Armada XP SDRAM controller

From: jlu@pengutronix.de (Jan Lübbe)
Date: 2017-08-11 09:34:46
Also in: linux-devicetree, linux-edac, lkml

On Thu, 2017-08-10 at 21:17 +0000, Chris Packham wrote:
On 11/08/17 08:38, Rob Herring wrote:
quoted
On Mon, Aug 07, 2017 at 01:46:39PM +1200, Chris Packham wrote:
[...]??
quoted
quoted
+Optional properties:
+ - marvell,reduced-width: some SoCs that use this SDRAM controller have
+???a reduced pin count. On such systems "full" width is 32-bits and
+???"half" width is 16-bits. Set this property to indicate that the SoC
+???used is such a system.
Maybe you should just state what the width is.
Specifying a number like 64/32/16 is done in for some other properties I?
dismissed that because what this is about how we interpret a?
pin-strapping option. I guess "max-width = <64>;" and "max-width =?
<32>"; would achieve the same.
quoted
Or your compatible string should just be specific enough to know the
width.
I decided against a new compatible sting that because the IP block?
really is the Armada-XP one and the existing compatible string is used?
in other places (using multiple compatible strings would solve that).

I'm not too fussed which of the 3 options are used. Is there any?
particular preference?
I'd prefer a specific compatible string, as it would avoid adding even
more properties if further difference turn up.

Rob, I seem to remember that some drivers match the top-level
compatible against a list of SoC variants to detect SoC-dependent
features in a generic IP block. Is that something you'd prefer instead?

Regards,
Jan
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