diff options
Diffstat (limited to 'drivers/mtd/spi-nor/core.c')
| -rw-r--r-- | drivers/mtd/spi-nor/core.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index bd2c7717eb10..cc08bd707378 100644 --- a/drivers/mtd/spi-nor/core.c +++ b/drivers/mtd/spi-nor/core.c @@ -1318,7 +1318,7 @@ static u32 spi_nor_convert_addr(struct spi_nor *nor, loff_t addr) /* * Initiate the erasure of a single sector */ -static int spi_nor_erase_sector(struct spi_nor *nor, u32 addr) +int spi_nor_erase_sector(struct spi_nor *nor, u32 addr) { int i; @@ -1411,9 +1411,7 @@ spi_nor_find_best_erase_type(const struct spi_nor_erase_map *map, continue; spi_nor_div_by_erase_size(erase, addr, &rem); - if (rem) - continue; - else + if (!rem) return erase; } @@ -2839,6 +2837,21 @@ static int spi_nor_init(struct spi_nor *nor) return 0; } +/** + * spi_nor_soft_reset() - Perform a software reset + * @nor: pointer to 'struct spi_nor' + * + * Performs a "Soft Reset and Enter Default Protocol Mode" sequence which resets + * the device to its power-on-reset state. This is useful when the software has + * made some changes to device (volatile) registers and needs to reset it before + * shutting down, for example. + * + * Not every flash supports this sequence. The same set of opcodes might be used + * for some other operation on a flash that does not support this. Support for + * this sequence can be discovered via SFDP in the BFPT table. + * + * Return: 0 on success, -errno otherwise. + */ static void spi_nor_soft_reset(struct spi_nor *nor) { struct spi_mem_op op; @@ -3444,6 +3457,7 @@ static struct spi_mem_driver spi_nor_driver = { .driver = { .name = "spi-nor", .of_match_table = spi_nor_of_table, + .dev_groups = spi_nor_sysfs_groups, }, .id_table = spi_nor_dev_ids, }, |