[RFC PATCH 1/8] mtd: spi-nor: Create macros to define chip IDs and geometries

[Miquel Raynal]

The INFO() macro defines an ID array and a couple of geometry
properties. Right now all its lines are duplicated twice because of the
INFO6() macro (for extended IDs) and soon as well we will need to add a
geometry parameter to include the number of banks.

In order to limit the code duplication, let's create a number of
intermediate macros which will facilitate defining high-level INFOX()
macros.

There is not functional change.

Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
---
 drivers/mtd/spi-nor/core.h | 43 ++++++++++++++++++--------------------
 1 file changed, 20 insertions(+), 23 deletions(-)

diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h
index b7fd760e3b47..85a1d464471f 100644
--- a/drivers/mtd/spi-nor/core.h
+++ b/drivers/mtd/spi-nor/core.h
@@ -417,33 +417,30 @@ struct flash_info {
 	const struct spi_nor_fixups *fixups;
 };
 
+#define SPI_NOR_ID_2ITEMS(_id) ((_id) >> 8) & 0xff, (_id) & 0xff
+#define SPI_NOR_ID_3ITEMS(_id) ((_id) >> 16) & 0xff, SPI_NOR_ID_2ITEMS(_id)
+
+#define SPI_NOR_ID(_jedec_id, _ext_id)					\
+	.id = { SPI_NOR_ID_3ITEMS(_jedec_id), SPI_NOR_ID_2ITEMS(_ext_id) }, \
+	.id_len = !(_jedec_id) ? 0 : (3 + ((_ext_id) ? 2 : 0))
+
+#define SPI_NOR_ID6(_jedec_id, _ext_id)					\
+	.id = { SPI_NOR_ID_3ITEMS(_jedec_id), SPI_NOR_ID_3ITEMS(_ext_id) }, \
+	.id_len = 6
+
+#define SPI_NOR_GEOMETRY(_sector_size, _n_sectors)			\
+	.sector_size = (_sector_size),					\
+	.n_sectors = (_n_sectors),					\
+	.page_size = 256
+
 /* Used when the "_ext_id" is two bytes at most */
 #define INFO(_jedec_id, _ext_id, _sector_size, _n_sectors)		\
-		.id = {							\
-			((_jedec_id) >> 16) & 0xff,			\
-			((_jedec_id) >> 8) & 0xff,			\
-			(_jedec_id) & 0xff,				\
-			((_ext_id) >> 8) & 0xff,			\
-			(_ext_id) & 0xff,				\
-			},						\
-		.id_len = (!(_jedec_id) ? 0 : (3 + ((_ext_id) ? 2 : 0))),	\
-		.sector_size = (_sector_size),				\
-		.n_sectors = (_n_sectors),				\
-		.page_size = 256,					\
+	SPI_NOR_ID((_jedec_id), (_ext_id)),				\
+	SPI_NOR_GEOMETRY((_sector_size), (_n_sectors)),
 
 #define INFO6(_jedec_id, _ext_id, _sector_size, _n_sectors)		\
-		.id = {							\
-			((_jedec_id) >> 16) & 0xff,			\
-			((_jedec_id) >> 8) & 0xff,			\
-			(_jedec_id) & 0xff,				\
-			((_ext_id) >> 16) & 0xff,			\
-			((_ext_id) >> 8) & 0xff,			\
-			(_ext_id) & 0xff,				\
-			},						\
-		.id_len = 6,						\
-		.sector_size = (_sector_size),				\
-		.n_sectors = (_n_sectors),				\
-		.page_size = 256,					\
+	SPI_NOR_ID6((_jedec_id), (_ext_id)),				\
+	SPI_NOR_GEOMETRY((_sector_size), (_n_sectors)),
 
 #define CAT25_INFO(_sector_size, _n_sectors, _page_size, _addr_width)	\
 		.sector_size = (_sector_size),				\
-- 
2.34.1