linux-kernel - Re: [PATCH 02/12] arm64: dts: imx8qxp: add readonly for ocotp

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Message-ID: <aQjFpSCHrrt2JG2n@lizhi-Precision-Tower-5810>
Date: Mon, 3 Nov 2025 10:09:25 -0500
From: Frank Li <Frank.li@....com>
To: John Ernberg <john.ernberg@...ia.se>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"imx@...ts.linux.dev" <imx@...ts.linux.dev>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 02/12] arm64: dts: imx8qxp: add readonly for ocotp

On Mon, Nov 03, 2025 at 11:22:55AM +0000, John Ernberg wrote:
> Hi Frank,
>
> On Wed, Oct 29, 2025 at 03:54:38PM -0400, Frank Li wrote:
> > Add readonly for ocotp because i.MX8QXP only support program fuse by scu.
>
> This is not true? The driver supports writing the fuses via the SCFW API,
> and we are using this way to populate the MAC fuses.

Yes!

Shanw:
	You can skip this patch. If need respin, I will drop it.

Frank
>
> Best regards // John Ernberg
> >
> > Signed-off-by: Frank Li <Frank.Li@....com>
> > ---
> >  arch/arm64/boot/dts/freescale/imx8qxp.dtsi | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/arch/arm64/boot/dts/freescale/imx8qxp.dtsi b/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
> > index def6de8d579d40919e4bf7f88e119611ae4cb69a..cc82cc319159c2558400fa641570cddd3ad3083d 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
> > @@ -234,6 +234,7 @@ ocotp: ocotp {
> >  			compatible = "fsl,imx8qxp-scu-ocotp";
> >  			#address-cells = <1>;
> >  			#size-cells = <1>;
> > +			read-only;
> >
> >  			fec_mac0: mac@2c4 {
> >  				reg = <0x2c4 6>;
> >
> > --
> > 2.34.1
> >