Re: [PATCH v5 03/10] mtd: spi-nor: core: Update name and description of spansion_set_4byte_addr_mode

From: Michael Walle
Date: Mon Apr 03 2023 - 08:45:49 EST


Am 2023-03-31 09:45, schrieb Tudor Ambarus:
Rename method to spi_nor_set_4byte_addr_mode_brwr and extend its
description. This method is described in JESD216 BFPT[SFDP_DWORD(16)],
BIT(28) and BIT(20).

Signed-off-by: Tudor Ambarus <tudor.ambarus@xxxxxxxxxx>
---
drivers/mtd/spi-nor/core.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 07be81afdc33..e8f6141c0ef6 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -564,15 +564,20 @@ int
spi_nor_set_4byte_addr_mode_wren_en4b_ex4b(struct spi_nor *nor, bool
enable)
}

/**
- * spansion_set_4byte_addr_mode() - Set 4-byte address mode for Spansion
- * flashes.
+ * spi_nor_set_4byte_addr_mode_brwr() - Set 4-byte address mode using
+ * SPINOR_OP_BRWR. Typically used by Spansion flashes.
* @nor: pointer to 'struct spi_nor'.
* @enable: true to enter the 4-byte address mode, false to exit the 4-byte
* address mode.
*
+ * 8-bit volatile bank register used to define A[30:A24] bits. MSB (bit[7]) is
+ * used to enable/disable 4-byte address mode. When MSB is set to ‘1’, 4-byte
+ * address mode is active and A[30:24] bits are don’t care. Write
instruction is
+ * SPINOR_OP_BRWR(17h) with 1 byte of data.
+ *

No "typically used by spansion"? I guess there is a reason for that.

In any case:
Reviewed-by: Michael Walle <michael@xxxxxxxx>