linux-kernel - Re: [PATCH v2 3/6] arm64: dts: ti: k3-j721e-main: Add serdes_ln

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Date:   Fri, 24 Apr 2020 15:15:24 -0500
From:   Rob Herring <robh@...nel.org>
To:     Kishon Vijay Abraham I <kishon@...com>
Cc:     Roger Quadros <rogerq@...com>, Tero Kristo <t-kristo@...com>,
        Nishanth Menon <nm@...com>, Sekhar Nori <nsekhar@...com>,
        Vignesh R <vigneshr@...com>, devicetree@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 3/6] arm64: dts: ti: k3-j721e-main: Add serdes_ln_ctrl
 node to select SERDES lane mux

On Thu, Mar 19, 2020 at 5:32 AM Kishon Vijay Abraham I <kishon@...com> wrote:
>
> Hi Rob,
>
> On 11/03/20 2:39 am, Rob Herring wrote:
> > On Tue, Mar 03, 2020 at 12:17:19PM +0200, Roger Quadros wrote:
> >> From: Kishon Vijay Abraham I <kishon@...com>
> >>
> >> Add serdes_ln_ctrl node used for selecting SERDES lane mux.
> >>
> >> Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
> >> Signed-off-by: Sekhar Nori <nsekhar@...com>
> >> Signed-off-by: Roger Quadros <rogerq@...com>
> >> ---
> >>  arch/arm64/boot/dts/ti/k3-j721e-main.dtsi | 27 ++++++++++++
> >>  include/dt-bindings/mux/mux-j721e-wiz.h   | 53 +++++++++++++++++++++++
> >>  2 files changed, 80 insertions(+)
> >>  create mode 100644 include/dt-bindings/mux/mux-j721e-wiz.h
> >>
> >> diff --git a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> >> index cbaadee5bfdc..c5d54af37e91 100644
> >> --- a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> >> +++ b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> >> @@ -5,6 +5,8 @@
> >>   * Copyright (C) 2016-2019 Texas Instruments Incorporated - http://www.ti.com/
> >>   */
> >>  #include <dt-bindings/phy/phy.h>
> >> +#include <dt-bindings/mux/mux.h>
> >> +#include <dt-bindings/mux/mux-j721e-wiz.h>
> >>
> >>  &cbass_main {
> >>      msmc_ram: sram@...00000 {
> >> @@ -19,6 +21,31 @@
> >>              };
> >>      };
> >>
> >> +    scm_conf: scm-conf@...000 {
> >> +            compatible = "syscon", "simple-mfd", "ti,j721e-system-controller";
> >
> > Wrong ordering. Most significant first.
> >
> >> +            reg = <0 0x00100000 0 0x1c000>;
> >> +            #address-cells = <1>;
> >> +            #size-cells = <1>;
> >> +            ranges = <0x0 0x0 0x00100000 0x1c000>;
> >> +
> >> +            serdes_ln_ctrl: serdes-ln-ctrl@...0 {
> >
> > Your syscon.yaml change is not valid if you have child nodes. Do a
> > specific binding for this block.
>
> Do you mean in addition to having platform specific binding for
> scm-conf, I need to have platform specific binding for serdes-ln-ctrl.

I mean 'dt-bindings: syscon: Add TI's J721E specific compatible string'.

While not currently enforced because 'unevaluatedProperties: false'
doesn't yet do anything, the intent with syscon.yaml is child nodes
are not allowed. If you have child nodes, you need your own schema.

Rob