[PATCH 6/6] mtd: spinand: micron: Add new Micron SPI NAND devices with multiple dies

[shiva.linuxworks at gmail.com]

From: Shivamurthy Shastri <sshivamurthy at micron.com>

Add device table for new Micron SPI NAND devices, which have multiple
dies.

Also, enable support to select the dies.

Signed-off-by: Shivamurthy Shastri <sshivamurthy at micron.com>
---
 drivers/mtd/nand/spi/micron.c | 55 +++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/drivers/mtd/nand/spi/micron.c b/drivers/mtd/nand/spi/micron.c
index fe91349999c6..6bacf14aafea 100644
--- a/drivers/mtd/nand/spi/micron.c
+++ b/drivers/mtd/nand/spi/micron.c
@@ -24,6 +24,14 @@
 
 #define MICRON_CFG_CR			BIT(0)
 
+/*
+ * As per datasheet, die selection is done by the 6th bit of Die
+ * Select Register (Address 0xD0).
+ */
+#define MICRON_DIE_SELECT_REG	0xD0
+
+#define MICRON_SELECT_DIE(x)	((x) << 6)
+
 static SPINAND_OP_VARIANTS(read_cache_variants,
 		SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
 		SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
@@ -70,6 +78,20 @@ static const struct mtd_ooblayout_ops micron_8_ooblayout = {
 	.rfree = micron_8_ooblayout_free,
 };
 
+static int micron_select_target(struct spinand_device *spinand,
+				unsigned int target)
+{
+	struct spi_mem_op op = SPINAND_SET_FEATURE_OP(MICRON_DIE_SELECT_REG,
+						      spinand->scratchbuf);
+
+	if (target > 1)
+		return -EINVAL;
+
+	*spinand->scratchbuf = MICRON_SELECT_DIE(target);
+
+	return spi_mem_exec_op(spinand->slave, &op);
+}
+
 static int micron_8_ecc_get_status(struct spinand_device *spinand,
 				   u8 status)
 {
@@ -137,6 +159,17 @@ static const struct spinand_info micron_spinand_table[] = {
 		     0,
 		     SPINAND_ECCINFO(&micron_8_ooblayout,
 				     micron_8_ecc_get_status)),
+	/* M79A 4Gb 3.3V */
+	SPINAND_INFO("MT29F4G01ADAGD", 0x36,
+		     NAND_MEMORG(1, 2048, 128, 64, 2048, 2, 1, 2),
+		     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),
+		     SPINAND_SELECT_TARGET(micron_select_target)),
 	/* M70A 4Gb 3.3V */
 	SPINAND_INFO("MT29F4G01ABAFD", 0x34,
 		     NAND_MEMORG(1, 4096, 256, 64, 2048, 1, 1, 1),
@@ -157,6 +190,28 @@ static const struct spinand_info micron_spinand_table[] = {
 		     SPINAND_HAS_CR_FEAT_BIT,
 		     SPINAND_ECCINFO(&micron_8_ooblayout,
 				     micron_8_ecc_get_status)),
+	/* M70A 8Gb 3.3V */
+	SPINAND_INFO("MT29F8G01ADAFD", 0x46,
+		     NAND_MEMORG(1, 4096, 256, 64, 2048, 1, 1, 2),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_CR_FEAT_BIT,
+		     SPINAND_ECCINFO(&micron_8_ooblayout,
+				     micron_8_ecc_get_status),
+		     SPINAND_SELECT_TARGET(micron_select_target)),
+	/* M70A 8Gb 1.8V */
+	SPINAND_INFO("MT29F8G01ADBFD", 0x47,
+		     NAND_MEMORG(1, 4096, 256, 64, 2048, 1, 1, 2),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_CR_FEAT_BIT,
+		     SPINAND_ECCINFO(&micron_8_ooblayout,
+				     micron_8_ecc_get_status),
+		     SPINAND_SELECT_TARGET(micron_select_target)),
 };
 
 static int micron_spinand_detect(struct spinand_device *spinand)
-- 
2.17.1