linux-kernel - [PATCH 2/2] mtd: spi-nor: winbond: Add support for w25q02jv

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Message-Id: <20241224-winbond-6-12-rc1-nor-volatile-bit-v1-2-f7c4dff66182@bootlin.com>
Date: Tue, 24 Dec 2024 17:47:42 +0100
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: Tudor Ambarus <tudor.ambarus@...aro.org>, 
 Pratyush Yadav <pratyush@...nel.org>, Michael Walle <mwalle@...nel.org>, 
 Miquel Raynal <miquel.raynal@...tlin.com>, 
 Richard Weinberger <richard@....at>, Vignesh Raghavendra <vigneshr@...com>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 Steam Lin <STLin2@...bond.com>, linux-mtd@...ts.infradead.org, 
 linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] mtd: spi-nor: winbond: Add support for w25q02jv

Add support for Winbond w25q02jv spi-nor chip which shares most of
w25q01jv's specificities as, this time, the chip is made of 4 different
dies.

Link: https://www.winbond.com/resource-files/W25Q02JV_DTR%20RevD%2007092024%20Plus.pdf
Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
---

Here is the basic test procedure output:

$ cat /sys/bus/spi/devices/spi0.0/spi-nor/partname
w25q02jv
$ cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
ef7022
$ cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
winbond
$ xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
53464450060101ff00060110800000ff84000102d00000ff03000102f000
00ffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffe520fbffffffff7f44eb086b083b42bbfeffffffffff
0000ffff40eb0c200f5210d800003602a60082ea14e2e96376337a757a75
f7a2d55c19f74dffe970f9a5ffffffffffffffffffffffffffffffffff0a
f0ff21ffdcff
$ md5suum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
3e7da68579120c32a12517d2b6634c3c  /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
$ dd if=/dev/urandom of=./qspi_test bs=1M count=1
1+0 records in
1+0 records out
$ mtd_debug write /dev/mtd0 0 1048576 qspi_test
Copied 1048576 bytes from qspi_test to address 0x00000000 in flash
$ mtd_debug erase /dev/mtd0 0 1048576
Erased 1048576 bytes from address 0x00000000 in flash
$ mtd_debug read /dev/mtd0 0 1048576 qspi_read
Copied 1048576 bytes from address 0x00000000 in flash to qspi_read
$ hexdump qspi_read
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
*
0100000
$ mtd_debug write /dev/mtd0 0 1048576 qspi_test
Copied 1048576 bytes from qspi_test to address 0x00000000 in flash
$ mtd_debug read /dev/mtd0 0 1048576 qspi_read
Copied 1048576 bytes from address 0x00000000 in flash to qspi_read
$ sha1sum qspi_test qspi_read
c662ae4e6b1268e23d5a5e930995213d2e4044cc  qspi_test
c662ae4e6b1268e23d5a5e930995213d2e4044cc  qspi_read
---
 drivers/mtd/spi-nor/winbond.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
index 4691e7a27ba1d70c75932c4e6b60fe36102138be..888367a8ee9967b5d7c7886dd2c6a1024f659609 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -253,6 +253,11 @@ static const struct flash_info winbond_nor_parts[] = {
 	}, {
 		.id = SNOR_ID(0xef, 0x70, 0x19),
 		.name = "w25q256jvm",
+	}, {
+		.id = SNOR_ID(0xef, 0x70, 0x22),
+		.name = "w25q02jv",
+		.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
+		.fixups = &w25q0xjv_fixups,
 	}, {
 		.id = SNOR_ID(0xef, 0x71, 0x19),
 		.name = "w25m512jv",

-- 
2.47.0