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

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Date:   Tue, 21 Jan 2020 10:43:04 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Rob Herring <robh@...nel.org>, Roger Quadros <rogerq@...com>
CC:     <t-kristo@...com>, <nm@...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

Hi Rob,

On 15/01/20 7:17 AM, Rob Herring wrote:
> 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.

Okay.
> 
>> +		compatible = "syscon", "simple-mfd";
> 
> Needs a specific compatible especially since the child node doesn't have 
> one.

Child node has "mmio-mux" as compatible no? Are you referring to
something else here?
> 
>> +		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'.

Sure, will add.


Thanks
Kishon

> 
>> +			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 */
>> -- 
>> Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
>> Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
>>