linux-kernel - [PATCH 20/21] mtd: spinand: winbond: Add octal program support

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Message-Id: <20250307-winbond-6-14-rc1-octal-v1-20-45c1e074ad74@bootlin.com>
Date: Fri, 07 Mar 2025 16:08:39 +0100
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: Richard Weinberger <richard@....at>, 
 Vignesh Raghavendra <vigneshr@...com>, Santhosh Kumar K <s-k6@...com>
Cc: Tudor Ambarus <tudor.ambarus@...aro.org>, 
 Pratyush Yadav <pratyush@...nel.org>, Michael Walle <michael@...le.cc>, 
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 Steam Lin <stlin2@...bond.com>, linux-mtd@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, Miquel Raynal <miquel.raynal@...tlin.com>
Subject: [PATCH 20/21] mtd: spinand: winbond: Add octal program support

Describe the octal read from cache operations (1S_1S_8S and 1S_8S_8S)
supported by the W35N01JW chip.

flash_speed test results ran on the TI AM62A7 LP SK using a 25MHz SPI bus:

* Single mode:
eraseblock write speed is 2028 KiB/s
page       write speed is 2028 KiB/s

* Octal modes:
eraseblock write speed is 7335 KiB/s
page       write speed is 7293 KiB/s

However, testing on the cadence qspi controller driver did not allow
easy "update cache" tests so these macros are untested and given as-is.

Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
---
 drivers/mtd/nand/spi/winbond.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/mtd/nand/spi/winbond.c b/drivers/mtd/nand/spi/winbond.c
index 4b1bfc15588ad3ffc8f2cb7615db6c14d0b62903..c263c9b5affe79a14466bc0e2ef2da53ecfd48cf 100644
--- a/drivers/mtd/nand/spi/winbond.c
+++ b/drivers/mtd/nand/spi/winbond.c
@@ -31,9 +31,12 @@ static SPINAND_OP_VARIANTS(read_cache_octal_variants,
 		SPINAND_PAGE_READ_FROM_CACHE_1S_1S_1S_OP(0, 1, NULL, 0));
 
 static SPINAND_OP_VARIANTS(write_cache_octal_variants,
+		SPINAND_PROG_LOAD_1S_8S_8S_OP(true, 0, NULL, 0),
+		SPINAND_PROG_LOAD_1S_1S_8S_OP(0, NULL, 0),
 		SPINAND_PROG_LOAD_1S_1S_1S_OP(true, 0, NULL, 0));
 
 static SPINAND_OP_VARIANTS(update_cache_octal_variants,
+		SPINAND_PROG_LOAD_1S_8S_8S_OP(false, 0, NULL, 0),
 		SPINAND_PROG_LOAD_1S_1S_1S_OP(false, 0, NULL, 0));
 
 static SPINAND_OP_VARIANTS(read_cache_dual_quad_dtr_variants,

-- 
2.48.1