yair/u-boot-tk1-som
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add wait flags to support board/chip specific delays

Browse Source 
The NAND flash on the TQM8548_BE modules requires a short delay after
running the UPM pattern like the MPC8360ERDK board does. The TQM8548_BE
requires a further short delay after writing out a buffer. Normally the
R/B pin should be checked, but it's not connected on the TQM8548_BE.
The corresponding Linux FSL UPM driver uses similar delay points at the
same locations. To manage these extra delays in a more general way, I
introduced the "wait_flags" field allowing the board-specific driver to
specify various types of extra delay.

Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Wolfgang Grandegger
2009-02-11 18:38:23 +01:00
committed by Scott Wood
parent 06e9f7df05
commit 33846df28f
3 changed files with 34 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
include/linux/mtd/fsl_upm.h
View File

@@ -15,6 +15,10 @@
#include <linux/mtd/nand.h>
#define FSL_UPM_WAIT_RUN_PATTERN 0x1
#define FSL_UPM_WAIT_WRITE_BYTE 0x2
#define FSL_UPM_WAIT_WRITE_BUFFER 0x4
struct fsl_upm {
void __iomem *mdr;
void __iomem *mxmr;
@@ -29,7 +33,7 @@ struct fsl_upm_nand {
int upm_cmd_offset;
int upm_addr_offset;
int upm_mar_chip_offset;
int wait_pattern;
int wait_flags;
int (*dev_ready)(int chip_nr);
int chip_delay;
int chip_offset;