未验证 提交 f9acd7fa 编写于 作者: P Pratyush Yadav 提交者: Tudor Ambarus

mtd: spi-nor: sfdp: default to addr_width of 3 for configurable widths

JESD216D.01 says that when the address width can be 3 or 4, it defaults
to 3 and enters 4-byte mode when given the appropriate command. So, when
we see a configurable width, default to 3 and let flash that default to
4 change it in a post-bfpt fixup.

This fixes SMPT parsing for flashes with configurable address width. If
the SMPT descriptor advertises variable address width, we use
nor->addr_width as the address width. But since it was not set to any
value from the SFDP table, the read command uses an address width of 0,
resulting in an incorrect read being issued.
Signed-off-by: NPratyush Yadav <p.yadav@ti.com>
Signed-off-by: NTudor Ambarus <tudor.ambarus@microchip.com>
上级 8a2644d5
无相关合并请求
......@@ -460,6 +460,7 @@ static int spi_nor_parse_bfpt(struct spi_nor *nor,
/* Number of address bytes. */
switch (bfpt.dwords[BFPT_DWORD(1)] & BFPT_DWORD1_ADDRESS_BYTES_MASK) {
case BFPT_DWORD1_ADDRESS_BYTES_3_ONLY:
case BFPT_DWORD1_ADDRESS_BYTES_3_OR_4:
nor->addr_width = 3;
break;
......
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