[PATCH v6 2/2] mtd: spi-nor: macronix: Add support for mx25uw51245g with RWW

[Miquel Raynal]

Describe this new part and provide the RWW flag for it.

There is no public datasheet, but here are the sfdp tables plus base
testing to show it works.

$ cat /sys/bus/spi/devices/spi0.0/spi-nor/partname
mx25uw51245g
$ cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
c2813a
$ cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
macronix
$ xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp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$ md5sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
047a884cf44d9ffc2a94d3ab37b48c63  /sys/bus/spi/devices/spi0.0/spi-nor/sfdp

$ dd if=/dev/urandom of=./qspi_test bs=1M count=6
6+0 records in
6+0 records out
$ mtd_debug write /dev/mtd1 0 6291456 qspi_test
Copied 6291456 bytes from qspi_test to address 0x00000000 in flash
$ mtd_debug erase /dev/mtd1 0 6291456
Erased 6291456 bytes from address 0x00000000 in flash
$ mtd_debug read /dev/mtd1 0 6291456 qspi_read
Copied 6291456 bytes from address 0x00000000 in flash to qspi_read
$ hexdump qspi_read
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
*
0600000
$ mtd_debug write /dev/mtd1 0 6291456 qspi_test
Copied 6291456 bytes from qspi_test to address 0x00000000 in flash
$ mtd_debug read /dev/mtd1 0 6291456 qspi_read
Copied 6291456 bytes from address 0x00000000 in flash to qspi_read
$ sha1sum qspi_test qspi_read
d24a9523db829a0df688f34b8dc76a1383b74024  qspi_test
d24a9523db829a0df688f34b8dc76a1383b74024  qspi_read

Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
---
 drivers/mtd/spi-nor/macronix.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/mtd/spi-nor/macronix.c b/drivers/mtd/spi-nor/macronix.c
index 6853ec9ae65d..7db1a1a6a1fb 100644
--- a/drivers/mtd/spi-nor/macronix.c
+++ b/drivers/mtd/spi-nor/macronix.c
@@ -82,6 +82,9 @@ static const struct flash_info macronix_nor_parts[] = {
 	{ "mx25u51245g", INFO(0xc2253a, 0, 64 * 1024, 1024)
 		NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)
 		FIXUP_FLAGS(SPI_NOR_4B_OPCODES) },
+	{ "mx25uw51245g", INFOB(0xc2813a, 0, 0, 0, 4)
+		PARSE_SFDP
+		FLAGS(SPI_NOR_RWW) },
 	{ "mx25v8035f",  INFO(0xc22314, 0, 64 * 1024,  16)
 		NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
 			      SPI_NOR_QUAD_READ) },
-- 
2.34.1