linux-kernel - Re: [PATCH v2 1/3] dt-bindings: arm: ti: Add bindings for AM62D2 SoC

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Message-ID: <e7ddd359-bf19-4f6a-af32-43bcb5504ab1@ti.com>
Date: Mon, 5 May 2025 15:01:17 +0530
From: Paresh Bhagat <p-bhagat@...com>
To: Nishanth Menon <nm@...com>
CC: <vigneshr@...com>, <praneeth@...com>, <kristo@...nel.org>,
        <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <khasim@...com>, <v-singh1@...com>,
        <afd@...com>
Subject: Re: [PATCH v2 1/3] dt-bindings: arm: ti: Add bindings for AM62D2 SoC

Hi Nishanth,


On 02/05/25 21:35, Nishanth Menon wrote:
> On 21:09-20250502, Paresh Bhagat wrote:
>> The AM62D2 SoC belongs to the K3 Multicore SoC architecture with DSP core
>> targeted for applications needing high-performance Digital Signal
>> Processing. It is used in applications like automotive audio systems,
>> professional sound equipment, radar and radio for aerospace, sonar in
>> marine devices, and ultrasound in medical imaging. It also supports
>> precise signal analysis in test and measurement tools.
>>
>> Some highlights of AM62D2 SoC are:
>>
>> * Quad-Cortex-A53s (running up to 1.4GHz) in a single cluster. Dual/Single
>>    core variants are provided in the same package to allow HW compatible
>>    designs.
>> * One Device manager Cortex-R5F for system power and resource management,
>>    and one Cortex-R5F for Functional Safety or general-purpose usage.
>> * DSP with Matrix Multiplication Accelerator(MMA) (up to 2 TOPS) based on
>>    single core C7x.
>> * 3x Multichannel Audio Serial Ports (McASP) Up to 4/6/16 Serial Data Pins
>>    which can Transmit and Receive Clocks up to 50MHz, with multi-channel I2S
>>    and TDM Audio inputs and outputs.
>> * Integrated Giga-bit Ethernet switch supporting up to a total of two
>>    external ports with TSN capable to enable audio networking features such
>>    as, Ethernet Audio Video Bridging (eAVB) and Dante.
>> * 9xUARTs, 5xSPI, 6xI2C, 2xUSB2, 3xCAN-FD, 3x eMMC and SD, OSPI memory
>>    controller, 1x CSI-RX-4L for Camera, eCAP/eQEP, ePWM, among other
>>    peripherals.
>> * Dedicated Centralized Hardware Security Module with support for secure
>>    boot, debug security and crypto acceleration and trusted execution
>>    environment.
>> * One 32 bit DDR Subsystem that supports LPDDR4, DDR4 memory types.
>> * Low power mode support: Partial IO support for CAN/GPIO/UART wakeup.
>>
>> This adds dt bindings for TI's AM62D2 family of devices.
>>
>> More details about the SoCs can be found in the Technical Reference Manual:
>> https://www.ti.com/lit/pdf/sprujd4
>>
>> Signed-off-by: Paresh Bhagat <p-bhagat@...com>
> Looking at the board patch in the series, this is am62p5 ? what is the
> difference? If there is a difference, why is there no dtsi
> file for am62d?
AM62d2 SoC is similar to AM62a7 in terms of CPU cores, cache hierarchy 
and other peripherals. 
https://lore.kernel.org/linux-arm-kernel/20220901141328.899100-5-vigneshr@ti.com/
Thus same dtsi file is being reused here.
>
>> ---
>>   Documentation/devicetree/bindings/arm/ti/k3.yaml | 6 ++++++
>>   1 file changed, 6 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/arm/ti/k3.yaml b/Documentation/devicetree/bindings/arm/ti/k3.yaml
>> index a6d9fd0bcaba..bac821d63cf1 100644
>> --- a/Documentation/devicetree/bindings/arm/ti/k3.yaml
>> +++ b/Documentation/devicetree/bindings/arm/ti/k3.yaml
>> @@ -31,6 +31,12 @@ properties:
>>             - const: phytec,am62a-phycore-som
>>             - const: ti,am62a7
>>   
>> +      - description: K3 AM62D2 SoC and Boards
>> +        items:
>> +          - enum:
>> +              - ti,am62d2-evm
>> +          - const: ti,am62d2
>> +
>>         - description: K3 AM62P5 SoC and Boards
>>           items:
>>             - enum:
>> -- 
>> 2.34.1
>>