Hi Stephen

Thank you for your feedback

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I'm sending this "of: replace Asahi Kasei Corp vendor prefix" during
half-year (since Jun 2014) , many times. But, no-one care it.
I don't know who is the best maintainer.
 - Stephen : because it has Tegra ?
 - Olof    : because it has Tegra (= ARM) ?
 - Arnd    : because it has Tegra (= ARM) ?
 - Matthias: because it has Tegra (= ARM SoC) ?
 - Rob     : because DT ?
 - Andrew  : Last chance ?

But, could you please care this patch ?
I will re-send it again

It doesn't seem to be ack'd by any of the DT maintainers. Retro-actively
changing a DT vendor name would need that, I think.

Rob ?
I had sent this patch to him since half-years ago, many times...
Or other maintainer ?

Thierry and Alex (both Tegra maintainers) appear to have ack'd it, so it
seems they expect it to go through some tree other than Tegra. Weren't
there a bunch of related patches along with this (e.g. updating relevant
drivers to support both prefixes?) so it was expected this patch would
be applied together with them?

I guess they expected it goes to DT branch (?)
This is only 1 patch. it doesn't have related patch-set

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From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

Current vendor-prefixes.txt already has "ak" prefix for Asahi Kasei Corp
by ae8c4209af2c(of: Add vendor prefix for Asahi Kasei Corp.)

It went through the appropriate review process. But, almost all
Asahi Kasei chip drivers are using "asahi-kasei" prefix today.
(arch/arm/boot/dts/tegra20-seaboard.dts only is using "ak,ak8975",
 but there are instances of "asahi-kasei,ak8975" in other dts files.
 And drivers/iio/magnetometer/ak8975.c doesn't support "ak,ak8975" prefix)
So, we made a mistake there.

In addition, checkpatch.pl reports WARNING if it is using "asahi-kasei"
prerfix in DT file.
(DT compatible string vendor "asahi-kasei" appears un-documented)

Marking it deprecated and warning with checkpatch is certainly
preferable. So, this patch replace "ak" to "asahi-kasei" in
vendor-prefixes.txt. (and fixup tegra20-seaboard)

OTOH, Asahi Kasei is usually referred to as "AKM", but this patch
doesn't care about it. Because no DT is using that today.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Thierry Reding <redacted>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>

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diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt

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-ak	Asahi Kasei Corp.

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+asahi-kasei	Asahi Kasei Corp.

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diff --git a/arch/arm/boot/dts/tegra20-seaboard.dts b/arch/arm/boot/dts/tegra20-seaboard.dts

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 		magnetometer at c {
-			compatible = "ak,ak8975";
+			compatible = "asahi-kasei,ak8975";

Best regards
---
Kuninori Morimoto