linux-kernel - Re: [PATCH v7 1/5] ARM: dts: aspeed: Drop reg-io-width from LPC nodes

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Date:   Thu, 21 Oct 2021 06:28:56 +0000
From:   Joel Stanley <joel@....id.au>
To:     Chia-Wei Wang <chiawei_wang@...eedtech.com>,
        Andrew Jeffery <andrew@...id.au>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-aspeed <linux-aspeed@...ts.ozlabs.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
        Oskar Senft <osk@...gle.com>
Subject: Re: [PATCH v7 1/5] ARM: dts: aspeed: Drop reg-io-width from LPC nodes

On Fri, 8 Oct 2021 at 04:35, Joel Stanley <joel@....id.au> wrote:
>
> On Mon, 27 Sept 2021 at 02:31, Chia-Wei Wang
> <chiawei_wang@...eedtech.com> wrote:
> >
> > The 'reg-io-width' properties are not used by LPC drivers
> > nor documented as part of bindings. Therefore drop them.
>
> I assume they are there due to the lpc having a 'syscon' compatible.
> THey are documented in the syscon bindings:
>
> Documentation/devicetree/bindings/mfd/syscon.yaml
>
> Andrew, do you have any comments?

Andrew indicated to me that he agreed with my observation: the
properties should be present as they are used by the regmap/syscon.

>
> >
> > This is in preparation to move aspeed-lpc.txt to YAML schema.
> >
> > Signed-off-by: Chia-Wei Wang <chiawei_wang@...eedtech.com>
> > ---
> >  arch/arm/boot/dts/aspeed-g4.dtsi | 1 -
> >  arch/arm/boot/dts/aspeed-g5.dtsi | 1 -
> >  arch/arm/boot/dts/aspeed-g6.dtsi | 1 -
> >  3 files changed, 3 deletions(-)
> >
> > diff --git a/arch/arm/boot/dts/aspeed-g4.dtsi b/arch/arm/boot/dts/aspeed-g4.dtsi
> > index c5aeb3cf3a09..45a25eb4baa4 100644
> > --- a/arch/arm/boot/dts/aspeed-g4.dtsi
> > +++ b/arch/arm/boot/dts/aspeed-g4.dtsi
> > @@ -345,7 +345,6 @@
> >                         lpc: lpc@...89000 {
> >                                 compatible = "aspeed,ast2400-lpc-v2", "simple-mfd", "syscon";
> >                                 reg = <0x1e789000 0x1000>;
> > -                               reg-io-width = <4>;
> >
> >                                 #address-cells = <1>;
> >                                 #size-cells = <1>;
> > diff --git a/arch/arm/boot/dts/aspeed-g5.dtsi b/arch/arm/boot/dts/aspeed-g5.dtsi
> > index 73ca1ec6fc24..8e1d00d8445e 100644
> > --- a/arch/arm/boot/dts/aspeed-g5.dtsi
> > +++ b/arch/arm/boot/dts/aspeed-g5.dtsi
> > @@ -436,7 +436,6 @@
> >                         lpc: lpc@...89000 {
> >                                 compatible = "aspeed,ast2500-lpc-v2", "simple-mfd", "syscon";
> >                                 reg = <0x1e789000 0x1000>;
> > -                               reg-io-width = <4>;
> >
> >                                 #address-cells = <1>;
> >                                 #size-cells = <1>;
> > diff --git a/arch/arm/boot/dts/aspeed-g6.dtsi b/arch/arm/boot/dts/aspeed-g6.dtsi
> > index 1b47be1704f8..0d1aae6887cd 100644
> > --- a/arch/arm/boot/dts/aspeed-g6.dtsi
> > +++ b/arch/arm/boot/dts/aspeed-g6.dtsi
> > @@ -490,7 +490,6 @@
> >                         lpc: lpc@...89000 {
> >                                 compatible = "aspeed,ast2600-lpc-v2", "simple-mfd", "syscon";
> >                                 reg = <0x1e789000 0x1000>;
> > -                               reg-io-width = <4>;
> >
> >                                 #address-cells = <1>;
> >                                 #size-cells = <1>;
> > --
> > 2.17.1
> >