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new 0a4fbcd123 drivers/mtd: add Kconfig options for RAMTRON emulated page
& sector size
0a4fbcd123 is described below
commit 0a4fbcd123607e7ecb576b82793b60ab2d04371f
Author: Igor Mišić <[email protected]>
AuthorDate: Tue Feb 7 13:31:12 2023 +0100
drivers/mtd: add Kconfig options for RAMTRON emulated page & sector size
---
drivers/mtd/Kconfig | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
drivers/mtd/ramtron.c | 4 ++--
2 files changed, 50 insertions(+), 2 deletions(-)
diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig
index a07389d5ae..dcabd571e3 100644
--- a/drivers/mtd/Kconfig
+++ b/drivers/mtd/Kconfig
@@ -927,6 +927,54 @@ config RAMTRON_CHUNKING
Some Re-RAMs like MB85AS4MT have write buffer size limitation
and
require smaller, "chunked" writes.
+config RAMTRON_EMULATE_SECTOR_SHIFT
+ int "RAMTRON emulates sector size by setting shift value"
+ default 9
+ ---help---
+ RAMTRON devices do not have pages and sectors.
+ For purpose of the VFAT file system, we emulate them.
+
+ Specify sector shift value to determine emulated sector size.
+ The relationship between sector shift value and emulated sector
size is
+ described in the equation:
+ RAMTRON_EMULATE_SECTOR_SIZE = (1 <<
RAMTRON_EMULATE_SECTOR_SHIFT)
+
+ sector shift value : sector size in bytes
+ 0 : 1
+ 1 : 2
+ 2 : 4
+ 3 : 8
+ 4 : 16
+ 5 : 32
+ 6 : 64
+ 7 : 128
+ 8 : 256
+ 9 : 512
+
+config RAMTRON_EMULATE_PAGE_SHIFT
+ int "RAMTRON emulates page size by setting shift value"
+ default 9
+ ---help---
+ RAMTRON devices do not have pages and sectors.
+ For purpose of the VFAT file system, we emulate them.
+
+ Specify page shift value to determine emulated page size.
+ The relationship between page shift value and emulated page
size is
+ described in the equation:
+ RAMTRON_EMULATE_PAGE_SIZE = (1 << RAMTRON_EMULATE_PAGE_SHIFT)
+
+ page shift value : page size in bytes
+ 0 : 1
+ 1 : 2
+ 2 : 4
+ 3 : 8
+ 4 : 16
+ 5 : 32
+ 6 : 64
+ 7 : 128
+ 8 : 256
+ 9 : 512
+
endif # MTD_RAMTRON
config MTD_SST25
diff --git a/drivers/mtd/ramtron.c b/drivers/mtd/ramtron.c
index 504328dc7d..3ce90661e2 100644
--- a/drivers/mtd/ramtron.c
+++ b/drivers/mtd/ramtron.c
@@ -69,8 +69,8 @@
* configuration:
*/
-#define RAMTRON_EMULATE_SECTOR_SHIFT 9
-#define RAMTRON_EMULATE_PAGE_SHIFT 9
+#define RAMTRON_EMULATE_SECTOR_SHIFT CONFIG_RAMTRON_EMULATE_SECTOR_SHIFT
+#define RAMTRON_EMULATE_PAGE_SHIFT CONFIG_RAMTRON_EMULATE_PAGE_SHIFT
#define RAMTRON_EMULATE_PAGE_SIZE (1 << RAMTRON_EMULATE_PAGE_SHIFT)
/* RAMTRON Identification register values */
