linux-kernel - Re: [PATCH 0/2] mtd: spi-nor: add Global Block Unlock support

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Message-ID: <8e8e85e2-9645-0c1d-0c02-171185567fd9@microchip.com>
Date:   Fri, 23 Aug 2019 16:07:46 +0000
From:   <Tudor.Ambarus@...rochip.com>
To:     <marek.vasut@...il.com>, <vigneshr@...com>,
        <boris.brezillon@...labora.com>, <miquel.raynal@...tlin.com>,
        <richard@....at>, <linux-mtd@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/2] mtd: spi-nor: add Global Block Unlock support



This has nothing to do with the move manufacturer out of the spi-nor core
pursue, but depends on:

https://patchwork.ozlabs.org/project/linux-mtd/list/?series=127030

On 08/23/2019 07:05 PM, Tudor Ambarus - M18064 wrote:
> From: Tudor Ambarus <tudor.ambarus@...rochip.com>
> 
> This is similar with what other nor flashes are doing by clearing the
> block protection bits from the status register: disable the write
> protection after a power-on reset cycle.
> 
> The Global Block-Protection Unlock command offers a single command cycle
> that unlocks the entire memory array. Prefer this method for higher
> throughput.
> 
> Tested on the sst26vf064b flash using the atmel-quadspi driver.
> 
> Tudor Ambarus (2):
>   mtd: spi-nor: add Global Block Unlock support
>   mtd: spi-nor: unlock global block protection on sst26vf064b
> 
>  drivers/mtd/spi-nor/spi-nor.c | 51 +++++++++++++++++++++++++++++++++++++++++--
>  include/linux/mtd/spi-nor.h   |  1 +
>  2 files changed, 50 insertions(+), 2 deletions(-)
>