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[1/1] Changeable NAND_MAX_PAGESIZE and NAND_MAX_OOBSIZE

Message ID 2DE39384A09B744FA1E53FD4BF78D4305364C6@dware1013.doorway.loc
State New, archived
Headers show

Commit Message

Eirik Aanonsen Jan. 7, 2009, 4:49 p.m. UTC 
Is it feasible to get acceptance for implementing the two values
NAND_MAX_PAGESIZE and max NAND_MAX_OOBSIZE for the nand driver as a more
dynamic value?

The suggestion here is probably the easiest one and could be wrong for
all I know. Please don't chop my head off for trying. I am not
experienced in submitting patches

Signed-off-by: Eirik Aanonsen <eaa@wprmedical.com>
---
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Patch

diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index fcbdf87..68c96c6 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -387,4 +387,26 @@  config MTD_NAND_FSL_UPM
 	  Enables support for NAND Flash chips wired onto Freescale
PowerPC
 	  processor localbus with User-Programmable Machine support.
 
+comment "WARNING: NAND expert options"
+
+config MTD_NAND_MAX_PAGESIZE
+	int "NAND_MAX_PAGESIZE for nand page buffer. Size in KiB"
+	depends on MTD_NAND
+	default "2048"
+	help
+	  This allows you to configure the max page size on the nand
driver.
+	  Allows you to change the reserved memory for use in the nand
driver.
+	  WARNING: This value should not be subject to change without 
+	  extensive knowledge
+
+config MTD_NAND_MAX_OOBSIZE
+	int "NAND_MAX_OOBSIZE for nand oob buffer. Size in KiB"
+	depends on MTD_NAND
+	default "64"
+	help
+	  This allows you to configure the max oob size on the nand
driver.
+	  Allows you to change the reserved memory for use in the nand
driver.
+	  WARNING: This value should not be subject to change without 
+	  extensive knowledge
+
 endif # MTD_NAND
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 53ea3dc..cb5ce99 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -45,8 +45,16 @@  extern void nand_wait_ready(struct mtd_info *mtd);
  * is supported now. If you add a chip with bigger oobsize/page
  * adjust this accordingly.
  */
+#ifdef MTD_NAND_MAX_OOBSIZE
+#define NAND_MAX_OOBSIZE	CONFIG_MTD_NAND_MAX_OOBSIZE
+#else
 #define NAND_MAX_OOBSIZE	64
+#endif
+#ifdef MTD_NAND_MAX_PAGESIZE
+#define NAND_MAX_PAGESIZE	CONFIG_MTD_NAND_MAX_PAGESIZE
+#else
 #define NAND_MAX_PAGESIZE	2048
+#endif
 
 /*
  * Constants for hardware specific CLE/ALE/NCE function