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

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Date:   Fri, 8 Oct 2021 04:35:31 +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 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?

>
> 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
>