linux-kernel - [PATCH v4] mtd: spi-nor: Rename n25q512a to mt25qu512a(n25q512a)

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Date:   Thu, 29 Aug 2019 17:37:25 +0530
From:   Ashish Kumar <Ashish.Kumar@....com>
To:     tudor.ambarus@...rochip.com, marek.vasut@...il.com,
        dwmw2@...radead.org, computersforpeace@...il.com,
        miquel.raynal@...tlin.com, richard@....at, vigneshr@...com,
        linux-mtd@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, Ashish Kumar <Ashish.Kumar@....com>,
        Kuldeep Singh <kuldeep.singh@....com>
Subject: [PATCH v4] mtd: spi-nor: Rename n25q512a to mt25qu512a(n25q512a)

mt25qu512a is rebranded after its spinoff from STM, so it is
different only in term of operating frequency, JEDEC id
is same as that of n25q512a.
SPI_NOR_4B_OPCODES is appended to flash property.
This flash is tested for Single I/O and QUAD I/O mode on LS1046FRWY.

Signed-off-by: Kuldeep Singh <kuldeep.singh@....com>
Signed-off-by: Ashish Kumar <Ashish.Kumar@....com>
Reviewed-by: Vignesh Raghavendra <vigneshr@...com>
---
v4:
-Reword commit message as per review comments from
tudor.
- split into seperate patch 
v3:
-Reword commits msg
-rebase to top of mtd-linux spi-nor/next
v2:
Incorporate review comments from Vignesh

 drivers/mtd/spi-nor/spi-nor.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 73172d7f512b..b585f3fee4f0 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -1876,7 +1876,18 @@ static const struct flash_info spi_nor_ids[] = {
 	{ "n25q128a13",  INFO(0x20ba18, 0, 64 * 1024,  256, SECT_4K | SPI_NOR_QUAD_READ) },
 	{ "n25q256a",    INFO(0x20ba19, 0, 64 * 1024,  512, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
 	{ "n25q256ax1",  INFO(0x20bb19, 0, 64 * 1024,  512, SECT_4K | SPI_NOR_QUAD_READ) },
-	{ "n25q512a",    INFO(0x20bb20, 0, 64 * 1024, 1024, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) },
+
+	/* Micron */
+	/* n25q512a is rebraned as mt25qu512a after spin-off from ST,
+	 * JEDEC id remains same.
+	 * Operational frequency and Read Performance has increased
+	 */
+	{
+		"mt25qu512a(n25q512a)", INFO(0x20bb20, 0, 64 * 1024, 1024,
+			SECT_4K | USE_FSR | SPI_NOR_DUAL_READ |
+			SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES)
+	},
+
 	{ "n25q512ax3",  INFO(0x20ba20, 0, 64 * 1024, 1024, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) },
 	{ "n25q00",      INFO(0x20ba21, 0, 64 * 1024, 2048, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ | NO_CHIP_ERASE) },
 	{ "n25q00a",     INFO(0x20bb21, 0, 64 * 1024, 2048, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ | NO_CHIP_ERASE) },
-- 
2.17.1