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Wed, 21 Aug 2019 08:19:49 +0000 From: To: , Subject: Re: [PATCH] spi-nor: intel-spi: Whitelist 4B read commands Thread-Topic: [PATCH] spi-nor: intel-spi: Whitelist 4B read commands Thread-Index: AQHVOKtgwqaYRthXW0GNL3NvkrzY9acFgQQA Date: Wed, 21 Aug 2019 08:19:48 +0000 Message-ID: References: <20190712121401.28578-1-alexander.sverdlin@nokia.com> In-Reply-To: <20190712121401.28578-1-alexander.sverdlin@nokia.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: VI1PR08CA0194.eurprd08.prod.outlook.com (2603:10a6:800:d2::24) To MN2PR11MB4448.namprd11.prod.outlook.com (2603:10b6:208:193::29) x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [94.177.32.156] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 8eb948f2-747e-4168-6195-08d72610553c x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(2017052603328)(7193020); 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org On 07/12/2019 03:14 PM, Sverdlin, Alexander (Nokia - DE/Ulm) wrote: > External E-Mail > > > From: Alexander Sverdlin > > spi-nor.c issues 4B commands for some Flash chips bigger than 16Mbytes. > Xeon(R) D-1500 documentation mentions its Integrated PCH Logic supports > Flash chips up to 64Mbytes. > D-1500 Integrated PCH documenation however has inconsistencies regarding > FADDR register width and says nothing about particular commands issued > to support 64Mbytes of Flash. > > Nevetheless the tests on Xeon(R) CPU D-1548 with 512Mbit Flash chips > Macronix MX25L51245G and Micron MT25QL512A showed that erase, write and > read operations work just fine after SPINOR_OP_READ_4B and > SPINOR_OP_READ_FAST_4B are white-listed (currently only > SPINOR_OP_READ_FAST_4B is used and only for Macronix). > > Signed-off-by: Alexander Sverdlin > --- > drivers/mtd/spi-nor/intel-spi.c | 2 ++ > 1 file changed, 2 insertions(+) > Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git, spi-nor/next branch. Thanks, ta ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/