linux-kernel - Re: [PATCH 3/5] mtd: rawnand: gpmi: add iMX8QXP support.

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Date: Fri, 17 May 2024 20:39:04 +0200
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: Frank Li <Frank.Li@....com>
Cc: Richard Weinberger <richard@....at>, Vignesh Raghavendra
 <vigneshr@...com>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski
 <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Han Xu
 <han.xu@....com>, Vinod Koul <vkoul@...nel.org>, Shawn Guo
 <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, Pengutronix
 Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>,
 Marek Vasut <marex@...x.de>, linux-mtd@...ts.infradead.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 dmaengine@...r.kernel.org, imx@...ts.linux.dev,
 linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 3/5] mtd: rawnand: gpmi: add iMX8QXP support.

Hi Frank,

Frank.Li@....com wrote on Fri, 17 May 2024 14:09:50 -0400:

> From: Han Xu <han.xu@....com>
> 
> Add "fsl,imx8qxp-gpmi-nand" compatible string. iMX8QXP gpmi nand is similar
> with iMX7D. But it using 4 clock: "gpmi_io", "gpmi_apb", "gpmi_bch" and

  to?             is         clocks

> "gpmi_bch_apb".
> 
> Signed-off-by: Han Xu <han.xu@....com>
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
>  drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c | 20 +++++++++++++++++---
>  drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.h |  4 ++++
>  2 files changed, 21 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
> index e71ad2fcec232..f90c5207bacb6 100644
> --- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
> +++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
> @@ -983,7 +983,8 @@ static int gpmi_setup_interface(struct nand_chip *chip, int chipnr,
>  		return PTR_ERR(sdr);
>  
>  	/* Only MX28/MX6 GPMI controller can reach EDO timings */
> -	if (sdr->tRC_min <= 25000 && !GPMI_IS_MX28(this) && !GPMI_IS_MX6(this))
> +	if (sdr->tRC_min <= 25000 && !GPMI_IS_MX28(this) &&
> +	    !(GPMI_IS_MX6(this) || GPMI_IS_MX8(this)))

Feels completely redundant, no? If it's not an imx6 nor an imx28, it
already returns -ENOTSUPP.

>  		return -ENOTSUPP;

Fine otherwise.

Thanks,
Miquèl