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| author |  Tudor Ambarus <tudor.ambarus@linaro.org>
| 2023-03-31 07:46:05 +0000 |
|---|---|---|
| committer | Tudor Ambarus <tudor.ambarus@linaro.org>
| 2023-04-04 09:43:50 +0300 |
| commit | b6094ac83dd4fb4fa2849b804cc9fc1c70054852 (patch) | |
| tree | 4eb98c03c554891d49984c2ef2d28e22111f3c77 /drivers/mtd | |
| parent | mtd: spi-nor: core: Update flash's current address mode when changing address... (diff) | |
| download | linux-b6094ac83dd4fb4fa2849b804cc9fc1c70054852.tar.gz linux-b6094ac83dd4fb4fa2849b804cc9fc1c70054852.tar.bz2 linux-b6094ac83dd4fb4fa2849b804cc9fc1c70054852.zip | |
mtd: spi-nor: core: Introduce spi_nor_set_4byte_addr_mode()
Make the method public, as it will be used as a last resort to enable
4byte address mode when we can't determine the address mode at runtime.
Update the addr_nbytes and current address mode while exiting the 4byte
address mode too, as it may be used in the future by manufacturer
drivers. No functional change. spi_nor_restore didn't update the address
mode nbytes, but updating them now doesn't harm as the method is called
in the driver's remove and shutdown paths.
Link: https://lore.kernel.org/r/20230331074606.3559258-10-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 | 35 | ||||
| -rw-r--r-- | drivers/mtd/spi-nor/core.h | 1 |
2 files changed, 31 insertions, 5 deletions
diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index b20c690a24d7..1e30737b607b 100644 --- a/drivers/mtd/spi-nor/core.c +++ b/drivers/mtd/spi-nor/core.c @@ -3134,9 +3134,35 @@ static int spi_nor_quad_enable(struct spi_nor *nor) return nor->params->quad_enable(nor); } -static int spi_nor_init(struct spi_nor *nor) +/** + * spi_nor_set_4byte_addr_mode() - Set address mode. + * @nor: pointer to a 'struct spi_nor'. + * @enable: enable/disable 4 byte address mode. + * + * Return: 0 on success, -errno otherwise. + */ +int spi_nor_set_4byte_addr_mode(struct spi_nor *nor, bool enable) { struct spi_nor_flash_parameter *params = nor->params; + int ret; + + ret = params->set_4byte_addr_mode(nor, enable); + if (ret && ret != -ENOTSUPP) + return ret; + + if (enable) { + params->addr_nbytes = 4; + params->addr_mode_nbytes = 4; + } else { + params->addr_nbytes = 3; + params->addr_mode_nbytes = 3; + } + + return 0; +} + +static int spi_nor_init(struct spi_nor *nor) +{ int err; err = spi_nor_octal_dtr_enable(nor, true); @@ -3178,10 +3204,9 @@ static int spi_nor_init(struct spi_nor *nor) */ WARN_ONCE(nor->flags & SNOR_F_BROKEN_RESET, "enabling reset hack; may not recover from unexpected reboots\n"); - err = params->set_4byte_addr_mode(nor, true); - if (err && err != -ENOTSUPP) + err = spi_nor_set_4byte_addr_mode(nor, true); + if (err) return err; - params->addr_mode_nbytes = 4; } return 0; @@ -3300,7 +3325,7 @@ static void spi_nor_restore(struct spi_nor *nor) /* restore the addressing mode */ if (nor->addr_nbytes == 4 && !(nor->flags & SNOR_F_4B_OPCODES) && nor->flags & SNOR_F_BROKEN_RESET) { - ret = nor->params->set_4byte_addr_mode(nor, false); + ret = spi_nor_set_4byte_addr_mode(nor, false); if (ret) /* * Do not stop the execution in the hope that the flash diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h index 8953ddeb8625..ea9033cb0a01 100644 --- a/drivers/mtd/spi-nor/core.h +++ b/drivers/mtd/spi-nor/core.h @@ -651,6 +651,7 @@ int spi_nor_set_4byte_addr_mode_en4b_ex4b(struct spi_nor *nor, bool enable); int spi_nor_set_4byte_addr_mode_wren_en4b_ex4b(struct spi_nor *nor, bool enable); int spi_nor_set_4byte_addr_mode_brwr(struct spi_nor *nor, bool enable); +int spi_nor_set_4byte_addr_mode(struct spi_nor *nor, bool enable); int spi_nor_wait_till_ready(struct spi_nor *nor); int spi_nor_global_block_unlock(struct spi_nor *nor); int spi_nor_prep_and_lock(struct spi_nor *nor); |