mtd: spinand: winbond: Update the *JW chip definitions

W25N01JW and W25N02JW use a different technology with higher frequencies
supported (up to 166MHz). There is one drawback though, the slowest
READ_FROM_CACHE command cannot run above 54MHz. Because of that, we need
to set a limit for these chips on the basic READ_FROM_CACHE variant.

Duplicating this list is not a problem because these chips have DTR
support, and the list of supported variants will diverge from all the
other chips when adding support for it.

Cc: [email protected] # New feature being added
Signed-off-by: Miquel Raynal <[email protected]>

Author: miquelraynal

drivers/mtd/nand/spi/winbond.c

@@ -10,13 +10,22 @@
 #include <linux/device.h>
 #include <linux/kernel.h>
 #include <linux/mtd/spinand.h>
+#include <linux/units.h>
 
 #define SPINAND_MFR_WINBOND		0xEF
 
 #define WINBOND_CFG_BUF_READ		BIT(3)
 
 #define W25N04KV_STATUS_ECC_5_8_BITFLIPS	(3 << 4)
 
+static SPINAND_OP_VARIANTS(read_cache_dtr_variants,
+		SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_FAST_OP(0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_OP(0, 1, NULL, 0, 54 * HZ_PER_MHZ));
+
 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),
@@ -194,7 +203,7 @@ static const struct spinand_info winbond_spinand_table[] = {
 		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xbc, 0x21),
 		     NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
 		     NAND_ECCREQ(1, 512),
-		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_dtr_variants,
 					      &write_cache_variants,
 					      &update_cache_variants),
 		     0,
@@ -223,7 +232,7 @@ static const struct spinand_info winbond_spinand_table[] = {
 		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xbf, 0x22),
 		     NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 2, 1),
 		     NAND_ECCREQ(1, 512),
-		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_dtr_variants,
 					      &write_cache_variants,
 					      &update_cache_variants),
 		     0,