linux-kernel - Re: [PATCH] arm64: defconfig: Enable SPI NAND flashes

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Message-ID: <67ca6b29-6e55-48fa-8ad8-1850fd48f97a@ti.com>
Date: Mon, 6 Jan 2025 16:50:32 +0530
From: Santhosh Kumar K <s-k6@...com>
To: Krzysztof Kozlowski <krzk@...nel.org>,
        "catalin.marinas@....com"
	<catalin.marinas@....com>,
        "will@...nel.org" <will@...nel.org>
CC: "linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>,
        "Raghavendra, Vignesh" <vigneshr@...com>,
        "Mantena, Prasanth" <p-mantena@...com>, <s-k6@...com>
Subject: Re: [PATCH] arm64: defconfig: Enable SPI NAND flashes

Hi, Krzysztof,

On 02/01/25 21:35, Krzysztof Kozlowski wrote:
> On 02/01/2025 13:00, Santhosh Kumar K wrote:
>> Add support for SPI NAND flashes on ARM64 boards/EVMs such as:
>>
>> 1. W35N01JW on AM62x LP SK, AM62Ax SK, J721S2 EVM, J784S4 EVM,
>>     J722S EVM, J742S2 EVM
>> 2. W25N01JW on AM62Lx EVM
>>
> Please use recognizable names. git grep -i on some of above gave me zero
> results, so no models, no compatibles, no makefile entries use above
> names. Also really not sure where to look for - which vendor. This is
> defconfig for all users of arm64, not your private one.\

'git grep -i' on most of the above names results it's entry either from 
arch/arm64/boot/dts/ti/k3-*.dts or from drivers/mtd/nand/spi/winbond.c 
except for W35N01JW and AM62Lx EVM as the series which adds support for 
W35N01JW [1] and AM62Lx EVM [2] are yet to be merged.

Some 'git grep -i' results for your reference:
$ git grep -i "AM62x LP SK" 
 

arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts:14:    model = "Texas 
Instruments AM62x LP SK";

$ git grep -i "J784S4 EVM"
arch/arm64/boot/dts/ti/k3-j784s4-evm.dts:17:    model = "Texas 
Instruments J784S4 EVM";

$ git grep -i W25N01JW
drivers/mtd/nand/spi/winbond.c:254:     SPINAND_INFO("W25N01JW", /* 
high-speed 1.8V */

Nit: 'AM62Ax SK' should be 'AM62A7 SK'. I'll edit it in v2.

[1] 
https://lore.kernel.org/linux-mtd/20250102115110.1402440-1-s-k6@ti.com/T/#mfbbfc8852e70a077d2adbba0a4fddeed7b4237f1
[2] 
https://lore.kernel.org/linux-arm-kernel/20241117-am62lx-v1-0-4e71e42d781d@ti.com/

Thanks and Regards,
Santhosh.

> 
> Best regards,
> Krzysztof