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Wed, 17 Jul 2019 08:48:14 +0000 From: To: , CC: , , , , , , , , Subject: [PATCH 4/5] mtd: spi-nor: unlock global block protection on sst26vf064b Thread-Topic: [PATCH 4/5] mtd: spi-nor: unlock global block protection on sst26vf064b Thread-Index: AQHVPHxeihfxjuggyEqOfqXDefj3kw== Date: Wed, 17 Jul 2019 08:48:13 +0000 Message-ID: <20190717084745.19322-5-tudor.ambarus@microchip.com> References: <20190717084745.19322-1-tudor.ambarus@microchip.com> In-Reply-To: <20190717084745.19322-1-tudor.ambarus@microchip.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: VI1P195CA0085.EURP195.PROD.OUTLOOK.COM (2603:10a6:802:59::38) To BN6PR11MB1842.namprd11.prod.outlook.com (2603:10b6:404:101::18) x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.9.5 x-originating-ip: [94.177.32.154] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 1d20c345-0228-41c6-69ca-08d70a9380e4 x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(5600148)(711020)(4605104)(1401327)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(2017052603328)(7193020);SRVR:BN6SPR00MB254; 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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 1d20c345-0228-41c6-69ca-08d70a9380e4 X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Jul 2019 08:48:13.8606 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 3f4057f3-b418-4d4e-ba84-d55b4e897d88 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: tudor.ambarus@microchip.com X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6SPR00MB254 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tudor Ambarus To avoid inadvertent writes during power-up, sst26vf064b is write-protected by default after a power-on reset cycle. Unlock the serial flash memory by using the Global Block Protection Unlock command - it offers a single command cycle that unlocks the entire memory array. Signed-off-by: Tudor Ambarus --- drivers/mtd/spi-nor/spi-nor.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c index 767e2e6eb1b8..ffb53740031c 100644 --- a/drivers/mtd/spi-nor/spi-nor.c +++ b/drivers/mtd/spi-nor/spi-nor.c @@ -2075,7 +2075,9 @@ static const struct flash_info spi_nor_ids[] =3D { { "sst25wf040b", INFO(0x621613, 0, 64 * 1024, 8, SECT_4K) }, { "sst25wf040", INFO(0xbf2504, 0, 64 * 1024, 8, SECT_4K | SST_WRITE) }, { "sst25wf080", INFO(0xbf2505, 0, 64 * 1024, 16, SECT_4K | SST_WRITE) }, - { "sst26vf064b", INFO(0xbf2643, 0, 64 * 1024, 128, SECT_4K | SPI_NOR_DUAL= _READ | SPI_NOR_QUAD_READ) }, + { "sst26vf064b", INFO(0xbf2643, 0, 64 * 1024, 128, + SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | + UNLOCK_GLOBAL_BLOCK) }, =20 /* ST Microelectronics -- newer production may have feature updates */ { "m25p05", INFO(0x202010, 0, 32 * 1024, 2, 0) }, --=20 2.9.5