linux-kernel - Re: [PATCH v4 2/3] mtd: rawnand: stm32_fmc2: add STM32 FMC2 NAND flash controller driver

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Date:   Thu, 20 Dec 2018 14:43:57 +0100
From:   Boris Brezillon <boris.brezillon@...tlin.com>
To:     Christophe Kerello <christophe.kerello@...com>
Cc:     <miquel.raynal@...tlin.com>, <richard@....at>,
        <dwmw2@...radead.org>, <computersforpeace@...il.com>,
        <marek.vasut@...il.com>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, devicetree@...r.kernel.org,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com
Subject: Re: [PATCH v4 2/3] mtd: rawnand: stm32_fmc2: add STM32 FMC2 NAND
 flash controller driver

On Fri, 14 Dec 2018 10:58:07 +0100
Christophe Kerello <christophe.kerello@...com> wrote:

> The driver adds the support for the STMicroelectronics FMC2 NAND
> Controller found on STM32MP SOCs.
> 
> This patch is based on FMC2 command sequencer.
> The purpose of the command sequencer is to facilitate the programming
> and the reading of NAND flash pages with the ECC and to free the CPU
> of sequencing tasks.
> It requires one DMA channel for write and two DMA channels for read
> operations.
> 
> Only NAND_ECC_HW mode is actually supported.
> The driver supports a maximum 8k page size.
> The following ECC strength and step size are currently supported:
>  - nand-ecc-strength = <8>, nand-ecc-step-size = <512> (BCH8)
>  - nand-ecc-strength = <4>, nand-ecc-step-size = <512> (BCH4)
>  - nand-ecc-strength = <1>, nand-ecc-step-size = <512> (Extended ECC
>    based on Hamming)
> 
> This patch has been tested on Micron MT29F8G08ABACAH4 and
> MT29F8G16ABACAH4
> 
> Signed-off-by: Christophe Kerello <christophe.kerello@...com>

Reviewed-by: Boris Brezillon <boris.brezillon@...tlin.com>