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

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Message-ID: <20190823160452.14905-1-tudor.ambarus@microchip.com>
Date:   Fri, 23 Aug 2019 16:05:01 +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>
CC:     <Tudor.Ambarus@...rochip.com>
Subject: [PATCH 0/2] mtd: spi-nor: add Global Block Unlock support

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(-)

-- 
2.9.5