[PATCH 3/4] mtd: spinand: Add M70A series Micron SPI NAND devices

shiva.linuxworks at gmail.com shiva.linuxworks at gmail.com
Sun Jan 19 06:54:31 PST 2020


From: Shivamurthy Shastri <sshivamurthy at micron.com>

Add device table for M70A series Micron SPI NAND devices.

While at it, disable the Continuous Read feature which is enabled by
default.

Signed-off-by: Shivamurthy Shastri <sshivamurthy at micron.com>
---
 drivers/mtd/nand/spi/micron.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/drivers/mtd/nand/spi/micron.c b/drivers/mtd/nand/spi/micron.c
index 5fd1f921ef12..45fc37c58f8a 100644
--- a/drivers/mtd/nand/spi/micron.c
+++ b/drivers/mtd/nand/spi/micron.c
@@ -131,6 +131,26 @@ static const struct spinand_info micron_spinand_table[] = {
 		     0,
 		     SPINAND_ECCINFO(&micron_8_ooblayout,
 				     micron_8_ecc_get_status)),
+	/* M70A 4Gb 3.3V */
+	SPINAND_INFO("MT29F4G01ABAFD", 0x34,
+		     NAND_MEMORG(1, 4096, 256, 64, 2048, 40, 1, 1, 1),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     0,
+		     SPINAND_ECCINFO(&micron_8_ooblayout,
+				     micron_8_ecc_get_status)),
+	/* M70A 4Gb 1.8V */
+	SPINAND_INFO("MT29F4G01ABBFD", 0x35,
+		     NAND_MEMORG(1, 4096, 256, 64, 2048, 40, 1, 1, 1),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     0,
+		     SPINAND_ECCINFO(&micron_8_ooblayout,
+				     micron_8_ecc_get_status)),
 };
 
 static int micron_spinand_detect(struct spinand_device *spinand)
@@ -153,8 +173,19 @@ static int micron_spinand_detect(struct spinand_device *spinand)
 	return 1;
 }
 
+static int micron_spinand_init(struct spinand_device *spinand)
+{
+	/*
+	 * M70A device series enable Continuous Read feature at Power-up,
+	 * which is not supported. Disable this bit to avoid any possible
+	 * failure.
+	 */
+	return spinand_upd_cfg(spinand, CFG_QUAD_ENABLE, 0);
+}
+
 static const struct spinand_manufacturer_ops micron_spinand_manuf_ops = {
 	.detect = micron_spinand_detect,
+	.init = micron_spinand_init,
 };
 
 const struct spinand_manufacturer micron_spinand_manufacturer = {
-- 
2.17.1




More information about the linux-mtd mailing list