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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 Hi, Sven, On 6/14/20 2:53 AM, Sven Van Asbroeck wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > This chip is (nearly) identical to the Winbond w25q64 which is > already supported by Linux. Compared to the w25q64, the 'jv' > does not support Quad SPI mode, and has a different JEDEC ID. I'm reading the following datasheet: https://www.winbond.com/resource-files/w25q64jv%20revj%2003272018%20plus.pdf w25q64jvm (0xef7017) comes with QE bit set to a 0 state, but can be set to 1, so Quad mode can be supported. Would you please set SPI_NOR_DUAL_READ and SPI_NOR_QUAD_READ flags and test and see if Quad works? If all good, please specify in the commit message with which controller you did the tests. > > To: Tudor Ambarus > To: Miquel Raynal > To: Richard Weinberger > To: Vignesh Raghavendra > Cc: linux-mtd@lists.infradead.org > Cc: linux-kernel@vger.kernel.org Are these tags really necessary? Would you drop them? > Signed-off-by: Sven Van Asbroeck > --- > > Tree: next-20200613 > > drivers/mtd/spi-nor/winbond.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c > index 5062af10f138..18bdff02f57f 100644 > --- a/drivers/mtd/spi-nor/winbond.c > +++ b/drivers/mtd/spi-nor/winbond.c > @@ -65,6 +65,7 @@ static const struct flash_info winbond_parts[] = { > SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB) }, > { "w25x64", INFO(0xef3017, 0, 64 * 1024, 128, SECT_4K) }, > { "w25q64", INFO(0xef4017, 0, 64 * 1024, 128, SECT_4K) }, > + { "w25q64jv", INFO(0xef7017, 0, 64 * 1024, 128, SECT_4K) }, I would name it "w25q64jvm". Check "11.ORDERING INFORMATION". Although the datasheet refers to these flashes as "W25Q64JV-IQ/JQ" and "W25Q64JV-IM/JM", I find that the temperature range is not a differentiator in the flash ID, so I would drop it. Cheers, ta ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/