linux-kernel - [PATCH 1/2] mtd: spi-nor: add macros related to MICRON flash

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Message-Id: <1535706182-26804-2-git-send-email-yogeshnarayan.gaur@nxp.com>
Date:   Fri, 31 Aug 2018 14:33:01 +0530
From:   Yogesh Gaur <yogeshnarayan.gaur@....com>
To:     linux-mtd@...ts.infradead.org, boris.brezillon@...tlin.com,
        linux-spi@...r.kernel.org, marek.vasut@...il.com
Cc:     computersforpeace@...il.com, frieder.schrempf@...eet.de,
        linux-kernel@...r.kernel.org, david.wolfe@....com,
        Yogesh Gaur <yogeshnarayan.gaur@....com>
Subject: [PATCH 1/2] mtd: spi-nor: add macros related to MICRON flash

Some MICRON related macros in spi-nor domain were ST.
Rename entries related to STMicroelectronics under macro SNOR_MFR_ST.

Added entry of MFR Id for Micron flashes, 0x002C.

Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@....com>
---
 drivers/mtd/spi-nor/spi-nor.c | 9 ++++++---
 include/linux/mtd/cfi.h       | 1 +
 include/linux/mtd/spi-nor.h   | 3 ++-
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index f028277..33a55bc 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -271,6 +271,7 @@ static inline int set_4byte(struct spi_nor *nor, const struct flash_info *info,
 	u8 cmd;
 
 	switch (JEDEC_MFR(info)) {
+	case SNOR_MFR_ST:
 	case SNOR_MFR_MICRON:
 		/* Some Micron need WREN command; all will accept it */
 		need_wren = true;
@@ -1096,7 +1097,7 @@ static int spi_nor_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 	{ "mx66l1g45g",  INFO(0xc2201b, 0, 64 * 1024, 2048, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
 	{ "mx66l1g55g",  INFO(0xc2261b, 0, 64 * 1024, 2048, SPI_NOR_QUAD_READ) },
 
-	/* Micron */
+	/* Micron <--> ST Micro */
 	{ "n25q016a",	 INFO(0x20bb15, 0, 64 * 1024,   32, SECT_4K | SPI_NOR_QUAD_READ) },
 	{ "n25q032",	 INFO(0x20ba16, 0, 64 * 1024,   64, SPI_NOR_QUAD_READ) },
 	{ "n25q032a",	 INFO(0x20bb16, 0, 64 * 1024,   64, SPI_NOR_QUAD_READ) },
@@ -2502,6 +2503,7 @@ static int spi_nor_init_params(struct spi_nor *nor,
 			params->quad_enable = macronix_quad_enable;
 			break;
 
+		case SNOR_MFR_ST:
 		case SNOR_MFR_MICRON:
 			break;
 
@@ -2876,8 +2878,9 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,
 	mtd->_resume = spi_nor_resume;
 
 	/* NOR protection support for STmicro/Micron chips and similar */
-	if (JEDEC_MFR(info) == SNOR_MFR_MICRON ||
-			info->flags & SPI_NOR_HAS_LOCK) {
+	if (JEDEC_MFR(info) == SNOR_MFR_ST ||
+	    JEDEC_MFR(info) == SNOR_MFR_MICRON ||
+	    info->flags & SPI_NOR_HAS_LOCK) {
 		nor->flash_lock = stm_lock;
 		nor->flash_unlock = stm_unlock;
 		nor->flash_is_locked = stm_is_locked;
diff --git a/include/linux/mtd/cfi.h b/include/linux/mtd/cfi.h
index 9b57a9b..cbf7716 100644
--- a/include/linux/mtd/cfi.h
+++ b/include/linux/mtd/cfi.h
@@ -377,6 +377,7 @@ struct cfi_fixup {
 #define CFI_MFR_SHARP		0x00B0
 #define CFI_MFR_SST		0x00BF
 #define CFI_MFR_ST		0x0020 /* STMicroelectronics */
+#define CFI_MFR_MICRON		0x002C /* Micron */
 #define CFI_MFR_TOSHIBA		0x0098
 #define CFI_MFR_WINBOND		0x00DA
 
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index c922e97..f43bfc5 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -23,7 +23,8 @@
 #define SNOR_MFR_ATMEL		CFI_MFR_ATMEL
 #define SNOR_MFR_GIGADEVICE	0xc8
 #define SNOR_MFR_INTEL		CFI_MFR_INTEL
-#define SNOR_MFR_MICRON		CFI_MFR_ST /* ST Micro <--> Micron */
+#define SNOR_MFR_ST		CFI_MFR_ST	/* ST Micro */
+#define SNOR_MFR_MICRON		CFI_MFR_MICRON	/* Micron */
 #define SNOR_MFR_MACRONIX	CFI_MFR_MACRONIX
 #define SNOR_MFR_SPANSION	CFI_MFR_AMD
 #define SNOR_MFR_SST		CFI_MFR_SST
-- 
1.9.1