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| author | Tudor Ambarus <tudor.ambarus@linaro.org> | 2023-03-31 07:45:59 +0000 |
|---|---|---|
| committer | Tudor Ambarus <tudor.ambarus@linaro.org> | 2023-04-04 09:43:49 +0300 |
| commit | f1f1976224f3b2e0197cddf57b905a995c5528ca (patch) | |
| tree | a38f72fc0f8faa08787918a7f4e402c048a5e9e0 /drivers/mtd | |
| parent | 288df43783199dd796eb58552b997d92a115ebbd (diff) | |
| download | lwn-f1f1976224f3b2e0197cddf57b905a995c5528ca.tar.gz lwn-f1f1976224f3b2e0197cddf57b905a995c5528ca.zip | |
mtd: spi-nor: core: Update name and description of spansion_set_4byte_addr_mode
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).
Reviewed-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20230331074606.3559258-4-tudor.ambarus@linaro.org
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/spi-nor/core.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index 7c02983ce137..b868a06c6902 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. + * * Return: 0 on success, -errno otherwise. */ -static int spansion_set_4byte_addr_mode(struct spi_nor *nor, bool enable) +static int spi_nor_set_4byte_addr_mode_brwr(struct spi_nor *nor, bool enable) { int ret; @@ -2966,7 +2971,7 @@ static void spi_nor_init_default_params(struct spi_nor *nor) struct device_node *np = spi_nor_get_flash_node(nor); params->quad_enable = spi_nor_sr2_bit1_quad_enable; - params->set_4byte_addr_mode = spansion_set_4byte_addr_mode; + params->set_4byte_addr_mode = spi_nor_set_4byte_addr_mode_brwr; params->otp.org = &info->otp_org; /* Default to 16-bit Write Status (01h) Command */ |