[PATCH v2 11/25] mtd: spi-nor: winbond: W25Q64JW-Q/N: Add quad page program capability

[Miquel Raynal]

The benefit is not massive @25MHz, yet it is a supported feature
of the chip which is already handled by a flag, so let's enable it and
earn a few % write throughput.

Before:
$ flash_speed /dev/mtd0 -dc10
eraseblock write speed is 707 KiB/s
page write speed is 699 KiB/s
2 page write speed is 703 KiB/s

After:
$ flash_speed /dev/mtd0 -dc10
eraseblock write speed is 735 KiB/s
page write speed is 726 KiB/s
2 page write speed is 730 KiB/s

Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
---
+ cat /sys/kernel/debug/spi-nor/spi0.0/capabilities
Supported read modes by the flash
 1S-1S-1S
  opcode	0x03
  mode cycles	0
  dummy cycles	0
 1S-1S-2S
  opcode	0x3b
  mode cycles	0
  dummy cycles	8
 1S-2S-2S
  opcode	0xbb
  mode cycles	2
  dummy cycles	2
 1S-1S-4S
  opcode	0x6b
  mode cycles	0
  dummy cycles	8
 1S-4S-4S
  opcode	0xeb
  mode cycles	2
  dummy cycles	4
 4S-4S-4S
  opcode	0xeb
  mode cycles	2
  dummy cycles	0

Supported page program modes by the flash
 1S-1S-1S
  opcode	0x02
 1S-1S-4S
  opcode	0x32
---
 drivers/mtd/spi-nor/winbond.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
index 022fcfd05da2..7e79a415db4b 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -334,7 +334,7 @@ static const struct flash_info winbond_nor_parts[] = {
 		.id = SNOR_ID(0xef, 0x60, 0x17),
 		.name = "w25q64dw",
 		.size = SZ_8M,
-		.flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_HAS_CMP,
+		.flags = SPI_NOR_QUAD_PP | SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_HAS_CMP,
 		.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
 	}, {
 		/* W25Q128FW-G/Q, W25Q128JW-Q/N */

-- 
2.54.0