linux-kernel - Re: [PATCH linux dev-5.4 v2] ARM: dts: aspeed: witherspoon: Add gpio line names

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Message-ID: <CACPK8XcGJ61mgCL+vZQEzTmcwu+jZ0hpKrnOz7B7K14y79cvFQ@mail.gmail.com>
Date:   Thu, 6 Feb 2020 06:45:33 +0000
From:   Joel Stanley <joel@....id.au>
To:     Andrew Geissler <geissonator@...il.com>
Cc:     OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
        devicetree <devicetree@...r.kernel.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>,
        Andrew Geissler <geissonator@...oo.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>
Subject: Re: [PATCH linux dev-5.4 v2] ARM: dts: aspeed: witherspoon: Add gpio
 line names

On Wed, 5 Feb 2020 at 21:55, Andrew Geissler <geissonator@...il.com> wrote:
>
> From: Andrew Geissler <geissonator@...oo.com>
>
> Name the gpios so libgiod will work with them

Perhaps: "Name the GPIOs to help userspace work with them."

You could also mention that the names are describe the functionality
that the lines provide, and not a net or ball name.

A heads up: when you send patches upstream to the kernel mailing list,
we don't include the "linux dev-X.y" stuff in the subject.

> Signed-off-by: Andrew Geissler <geissonator@...oo.com>
> ---
> v2: added upstream to patch
>     prepended fsi- on fsi related gpios
>     prepended led- on led related gpios
>     prepended presence on presence related gpios
>     dropped pin_gpio_a1 definition
> ---
>  .../boot/dts/aspeed-bmc-opp-witherspoon.dts   | 36 +++++++++++++++++++
>  1 file changed, 36 insertions(+)
>
> diff --git a/arch/arm/boot/dts/aspeed-bmc-opp-witherspoon.dts b/arch/arm/boot/dts/aspeed-bmc-opp-witherspoon.dts
> index 515f0f208ee6..2519722928a4 100644
> --- a/arch/arm/boot/dts/aspeed-bmc-opp-witherspoon.dts
> +++ b/arch/arm/boot/dts/aspeed-bmc-opp-witherspoon.dts
> @@ -193,6 +193,42 @@
>
>  };
>
> +&gpio {
> +    status = "okay";

The status=okay is harmless but redundant, as this node is already enabled.

> +       gpio-line-names =
> +       /*A0-A7*/       "","cfam-reset","","","","","fsi-mux","",
> +       /*B0-B7*/       "","","","","","air-water","","",
> +       /*C0-C7*/       "","","","","","","","",
> +       /*D0-D7*/       "fsi-enable","","","","","","","",
> +       /*E0-E7*/       "fsi-data","","","","","","","",
> +       /*F0-F7*/       "","","","","","","","",
> +       /*G0-G7*/       "","","","","","","","",
> +       /*H0-H7*/       "","","","","","","","",
> +       /*I0-I7*/       "","","","","","","","",
> +       /*J0-J7*/       "","","checkstop","","","","","",
> +       /*K0-K7*/       "","","","","","","","",
> +       /*L0-L7*/       "","","","","","","","",
> +       /*M0-M7*/       "","","","","","","","",
> +       /*N0-N7*/       "presence-ps1","","led-rear-fault","led-rear-power",
> +                       "led-rear-id","","","",
> +       /*O0-O7*/       "","","","","","","","",
> +       /*P0-P7*/       "","","","","","","","presence-ps0",
> +       /*Q0-Q7*/       "","","","","","","","",
> +       /*R0-R7*/       "","","fsi-trans","","","power-button","","",
> +       /*S0-S7*/       "","","","","","","","",
> +       /*T0-T7*/       "","","","","","","","",
> +       /*U0-U7*/       "","","","","","","","",
> +       /*V0-V7*/       "","","","","","","","",
> +       /*W0-W7*/       "","","","","","","","",
> +       /*X0-X7*/       "","","","","","","","",
> +       /*Y0-Y7*/       "","","","","","","","",
> +       /*Z0-Z7*/       "","","","","","","","",
> +       /*AA0-AA7*/     "fsi-clock","","","","","","","",
> +       /*AB0-AB7*/     "","","","","","","","",
> +       /*AC0-AC7*/     "","","","","","","","";
> +

Cean up the line of whitespace here.

> +};
> +
>  &fmc {
>         status = "okay";
>
> --
> 2.21.0 (Apple Git-122)
>