linux-kernel - Re: [PATCH 2/5] arm64: dts: ti: k3-j721e-main: Add serdes_ln

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Message-ID: <20200115014724.GA20772@bogus>
Date:   Tue, 14 Jan 2020 19:47:24 -0600
From:   Rob Herring <robh@...nel.org>
To:     Roger Quadros <rogerq@...com>
Cc:     t-kristo@...com, nm@...com, kishon@...com, nsekhar@...com,
        vigneshr@...com, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] arm64: dts: ti: k3-j721e-main: Add serdes_ln_ctrl
 node to select SERDES lane mux

On Wed, Jan 08, 2020 at 01:18:27PM +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 | 26 +++++++++++
>  include/dt-bindings/mux/mux-j721e-wiz.h   | 53 +++++++++++++++++++++++
>  2 files changed, 79 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 24cb78db28e4..6741c1e67f50 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 +21,30 @@
>  		};
>  	};
>  
> +	scm_conf: scm_conf@...000 {

Don't use '_' in node names.

> +		compatible = "syscon", "simple-mfd";

Needs a specific compatible especially since the child node doesn't have 
one.

> +		reg = <0 0x00100000 0 0x1c000>;
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		ranges = <0x0 0x0 0x00100000 0x1c000>;
> +
> +		serdes_ln_ctrl: serdes_ln_ctrl@...0 {

'reg' is needed if there's a unit-address. If there's a register range 
with only the mux controls, then add 'reg'.

> +			compatible = "mmio-mux";
> +			#mux-control-cells = <1>;
> +			mux-reg-masks = <0x4080 0x3>, <0x4084 0x3>, /* SERDES0 lane0/1 select */
> +					<0x4090 0x3>, <0x4094 0x3>, /* SERDES1 lane0/1 select */
> +					<0x40a0 0x3>, <0x40a4 0x3>, /* SERDES2 lane0/1 select */
> +					<0x40b0 0x3>, <0x40b4 0x3>, /* SERDES3 lane0/1 select */
> +					<0x40c0 0x3>, <0x40c4 0x3>, <0x40c8 0x3>, <0x40cc 0x3>;
> +					/* SERDES4 lane0/1/2/3 select */
> +			idle-states = <SERDES0_LANE0_PCIE0_LANE0>, <SERDES0_LANE1_PCIE0_LANE1>,
> +				      <SERDES1_LANE0_PCIE1_LANE0>, <SERDES1_LANE1_PCIE1_LANE1>,
> +				      <SERDES2_LANE0_PCIE2_LANE0>, <SERDES2_LANE1_PCIE2_LANE1>,
> +				      <MUX_IDLE_AS_IS>, <SERDES3_LANE1_USB3_0>,
> +				      <SERDES4_LANE0_EDP_LANE0>, <SERDES4_LANE1_EDP_LANE1>, <SERDES4_LANE2_EDP_LANE2>, <SERDES4_LANE3_EDP_LANE3>;
> +		};
> +	};
> +
>  	gic500: interrupt-controller@...0000 {
>  		compatible = "arm,gic-v3";
>  		#address-cells = <2>;
> diff --git a/include/dt-bindings/mux/mux-j721e-wiz.h b/include/dt-bindings/mux/mux-j721e-wiz.h
> new file mode 100644
> index 000000000000..fd1c4ea9fc7f
> --- /dev/null
> +++ b/include/dt-bindings/mux/mux-j721e-wiz.h
> @@ -0,0 +1,53 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * This header provides constants for J721E WIZ.
> + */
> +
> +#ifndef _DT_BINDINGS_J721E_WIZ
> +#define _DT_BINDINGS_J721E_WIZ
> +
> +#define SERDES0_LANE0_QSGMII_LANE1	0x0
> +#define SERDES0_LANE0_PCIE0_LANE0	0x1
> +#define SERDES0_LANE0_USB3_0_SWAP	0x2
> +
> +#define SERDES0_LANE1_QSGMII_LANE2	0x0
> +#define SERDES0_LANE1_PCIE0_LANE1	0x1
> +#define SERDES0_LANE1_USB3_0		0x2
> +
> +#define SERDES1_LANE0_QSGMII_LANE3	0x0
> +#define SERDES1_LANE0_PCIE1_LANE0	0x1
> +#define SERDES1_LANE0_USB3_1_SWAP	0x2
> +#define SERDES1_LANE0_SGMII_LANE0	0x3
> +
> +#define SERDES1_LANE1_QSGMII_LANE4	0x0
> +#define SERDES1_LANE1_PCIE1_LANE1	0x1
> +#define SERDES1_LANE1_USB3_1		0x2
> +#define SERDES1_LANE1_SGMII_LANE1	0x3
> +
> +#define SERDES2_LANE0_PCIE2_LANE0	0x1
> +#define SERDES2_LANE0_SGMII_LANE0	0x3
> +#define SERDES2_LANE0_USB3_1_SWAP	0x2
> +
> +#define SERDES2_LANE1_PCIE2_LANE1	0x1
> +#define SERDES2_LANE1_USB3_1		0x2
> +#define SERDES2_LANE1_SGMII_LANE1	0x3
> +
> +#define SERDES3_LANE0_PCIE3_LANE0	0x1
> +#define SERDES3_LANE0_USB3_0_SWAP	0x2
> +
> +#define SERDES3_LANE1_PCIE3_LANE1	0x1
> +#define SERDES3_LANE1_USB3_0		0x2
> +
> +#define SERDES4_LANE0_EDP_LANE0		0x0
> +#define SERDES4_LANE0_QSGMII_LANE5	0x2
> +
> +#define SERDES4_LANE1_EDP_LANE1		0x0
> +#define SERDES4_LANE1_QSGMII_LANE6	0x2
> +
> +#define SERDES4_LANE2_EDP_LANE2		0x0
> +#define SERDES4_LANE2_QSGMII_LANE7	0x2
> +
> +#define SERDES4_LANE3_EDP_LANE3		0x0
> +#define SERDES4_LANE3_QSGMII_LANE8	0x2
> +
> +#endif /* _DT_BINDINGS_J721E_WIZ */
> -- 
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