linux-kernel - Re: [PATCH v5 1/5] arm64: dts: ti: k3-j784s4-main: Add system controller and SERDES lane mux

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Message-ID: <20230711153144.jvofubaez5uoog5p@unmanaged>
Date:   Tue, 11 Jul 2023 10:31:44 -0500
From:   Nishanth Menon <nm@...com>
To:     Jayesh Choudhary <j-choudhary@...com>
CC:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <vigneshr@...com>, <krzysztof.kozlowski+dt@...aro.org>,
        <afd@...com>, <s-vadapalli@...com>, <kristo@...nel.org>,
        <robh+dt@...nel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 1/5] arm64: dts: ti: k3-j784s4-main: Add system
 controller and SERDES lane mux

On 12:01-20230711, Jayesh Choudhary wrote:
> 
> 
> On 10/07/23 17:13, Krzysztof Kozlowski wrote:
> > On 10/07/2023 12:17, Jayesh Choudhary wrote:
> > > From: Siddharth Vadapalli <s-vadapalli@...com>
> > > 
> > > The system controller node manages the CTRL_MMR0 region.
> > > Add serdes_ln_ctrl node which is used for controlling the SERDES lane mux.
> > > 
> > > Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
> > > [j-choudhary@...com: Add reg property to fix dtc warning]
> > > Signed-off-by: Jayesh Choudhary <j-choudhary@...com>
> > > ---
> > >   arch/arm64/boot/dts/ti/k3-j784s4-main.dtsi | 23 ++++++++++++++++++++++
> > >   1 file changed, 23 insertions(+)
> > > 
> > > diff --git a/arch/arm64/boot/dts/ti/k3-j784s4-main.dtsi b/arch/arm64/boot/dts/ti/k3-j784s4-main.dtsi
> > > index 2ea0adae6832..68cc2fa053e7 100644
> > > --- a/arch/arm64/boot/dts/ti/k3-j784s4-main.dtsi
> > > +++ b/arch/arm64/boot/dts/ti/k3-j784s4-main.dtsi
> > > @@ -5,6 +5,9 @@
> > >    * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
> > >    */
> > > +#include <dt-bindings/mux/mux.h>
> > > +#include <dt-bindings/mux/ti-serdes.h>
> > 
> > Why? What do you use from that binding?
> > 
> 
> Missed idle-state in the mux-controller node here for default values.
> I will wait for more feedback and then re-spin the series.

btw, I am wondering if ti-serdes.h should even exist in dt-bindings -
are any of the macros used in the driver? or should this follow the
pinctrl style macros that could happily reside in arch/arm64/boot/dts/ti
?


-- 
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D