[PATCH 10/41] mtd: spi-nor: make sector_size optional

[Michael Walle]

Most of the (old, non-SFDP) flashes use a sector size of 64k. Make that
a default value so it can be optional in the flash_info database.

Signed-off-by: Michael Walle <mwalle at kernel.org>
---
 drivers/mtd/spi-nor/core.c | 6 ++++--
 drivers/mtd/spi-nor/core.h | 8 +++++---
 drivers/mtd/spi-nor/swp.c  | 6 +++++-
 3 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 5c6a0edafae2..cf0e25b4f9a9 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -2755,7 +2755,8 @@ static void spi_nor_no_sfdp_init_params(struct spi_nor *nor)
 {
 	struct spi_nor_flash_parameter *params = nor->params;
 	struct spi_nor_erase_map *map = &params->erase_map;
-	const u8 no_sfdp_flags = nor->info->no_sfdp_flags;
+	const struct flash_info *info = nor->info;
+	const u8 no_sfdp_flags = info->no_sfdp_flags;
 	u8 i, erase_mask;
 
 	if (no_sfdp_flags & SPI_NOR_DUAL_READ) {
@@ -2809,7 +2810,8 @@ static void spi_nor_no_sfdp_init_params(struct spi_nor *nor)
 		i++;
 	}
 	erase_mask |= BIT(i);
-	spi_nor_set_erase_type(&map->erase_type[i], nor->info->sector_size,
+	spi_nor_set_erase_type(&map->erase_type[i],
+			       info->sector_size ?: SPI_NOR_DEFAULT_SECTOR_SIZE,
 			       SPINOR_OP_SE);
 	spi_nor_init_uniform_erase_map(map, erase_mask, params->size);
 }
diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h
index c90445e186c0..734aedd4d62c 100644
--- a/drivers/mtd/spi-nor/core.h
+++ b/drivers/mtd/spi-nor/core.h
@@ -16,6 +16,7 @@
  */
 #define SPI_NOR_DEFAULT_PAGE_SIZE 256
 #define SPI_NOR_DEFAULT_N_BANKS 1
+#define SPI_NOR_DEFAULT_SECTOR_SIZE SZ_64K
 
 /* Standard SPI NOR flash operations. */
 #define SPI_NOR_READID_OP(naddr, ndummy, buf, len)			\
@@ -452,8 +453,9 @@ struct spi_nor_fixups {
  *                  JEDIC ID. JEDEC ID zero means "no ID" (mostly older chips).
  * @id_len:         the number of bytes of ID.
  * @size:           the size of the flash in bytes.
- * @sector_size:    the size listed here is what works with SPINOR_OP_SE, which
- *                  isn't necessarily called a "sector" by the vendor.
+ * @sector_size:    (optional) the size listed here is what works with
+ *                  SPINOR_OP_SE, which isn't necessarily called a "sector" by
+ *                  the vendor. Defaults to 64k.
  * @n_banks:        (optional) the number of banks. Defaults to 1.
  * @page_size:      (optional) the flash's page size. Defaults to 256.
  * @addr_nbytes:    number of address bytes to send.
@@ -565,7 +567,7 @@ struct flash_info {
 
 #define SPI_NOR_GEOMETRY(_sector_size, _n_sectors, _n_banks)		\
 	.size = (_sector_size) * (_n_sectors),				\
-	.sector_size = (_sector_size),					\
+	.sector_size = (_sector_size == SZ_64K) ? 0 : (_sector_size),	\
 	.n_banks = (_n_banks)
 
 /* Used when the "_ext_id" is two bytes at most */
diff --git a/drivers/mtd/spi-nor/swp.c b/drivers/mtd/spi-nor/swp.c
index 40bf52867095..585813310ee1 100644
--- a/drivers/mtd/spi-nor/swp.c
+++ b/drivers/mtd/spi-nor/swp.c
@@ -34,7 +34,11 @@ static u8 spi_nor_get_sr_tb_mask(struct spi_nor *nor)
 static u64 spi_nor_get_min_prot_length_sr(struct spi_nor *nor)
 {
 	unsigned int bp_slots, bp_slots_needed;
-	unsigned int sector_size = nor->info->sector_size;
+	/*
+	 * sector_size will eventually be replaced with the max erase size of
+	 * the flash. For now, we need to have that ugly default.
+	 */
+	unsigned int sector_size = nor->info->sector_size ?: SPI_NOR_DEFAULT_SECTOR_SIZE;
 	u64 n_sectors = div_u64(nor->params->size, sector_size);
 	u8 mask = spi_nor_get_sr_bp_mask(nor);
 

-- 
2.39.2