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| author | John Schmoller <jschmoller@xes-inc.com> | 2010-10-22 00:20:25 -0500 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2010-10-22 02:17:19 -0500 |
| commit | 72fb68d53cfbe505319cbb4aa92a1fe7ecf3d4fb (patch) | |
| tree | 560c19ad46b92223c88e5f67173b6bfed7b23788 /board/xes | |
| parent | 92af6549b8c52e9c973e4e197aa4d1edf4df5803 (diff) | |
| download | u-boot-72fb68d53cfbe505319cbb4aa92a1fe7ecf3d4fb.tar.gz u-boot-72fb68d53cfbe505319cbb4aa92a1fe7ecf3d4fb.tar.xz u-boot-72fb68d53cfbe505319cbb4aa92a1fe7ecf3d4fb.zip | |
xes: Add board_flash_wp_on()
Add board_flash_wp_on() to check a pca9557 gpio pin to see
if non-volatile memory write protection is enabled.
Previously, write protected NOR flashes would fail initialization which
resulted in a bootup error such as:
...
DTT: 53 C local / 64 C remote (adt7461@4c)
DTT: 54 C local (ds1621@48)
FLASH: Executed from FLASH1
POST memory PASSED
FLASH: ## Unknown FLASH on Bank 1 - Size = 0x00000000 = 0 MB
## Unknown FLASH on Bank 2 - Size = 0x00000000 = 0 MB
*** failed ***
### ERROR ### Please RESET the board ###
With this patch, NOR flash initialization is skipped:
...
DTT: 53 C local / 64 C remote (adt7461@4c)
DTT: 54 C local (ds1621@48)
FLASH: Executed from FLASH1
POST memory PASSED
FLASH: Uninitialized - Write Protect On
L2: 1024 KB enabled
NAND: 1024 MiB
...
Note that flash related commands such as flinfo and saveenv will error
out when flash write protection is enabled.
Signed-off-by: John Schmoller <jschmoller@xes-inc.com>
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'board/xes')
| -rw-r--r-- | board/xes/common/fsl_8xxx_misc.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/board/xes/common/fsl_8xxx_misc.c b/board/xes/common/fsl_8xxx_misc.c index e37a3c1123..b7fa6950b0 100644 --- a/board/xes/common/fsl_8xxx_misc.c +++ b/board/xes/common/fsl_8xxx_misc.c @@ -22,6 +22,21 @@ #include <common.h> #include <asm/mmu.h> +#ifdef CONFIG_PCA953X +#include <pca953x.h> + +/* + * Determine if a board's flashes are write protected + */ +int board_flash_wp_on(void) +{ + if (pca953x_get_val(CONFIG_SYS_I2C_PCA953X_ADDR0) & + CONFIG_SYS_PCA953X_NVM_WP) + return 1; + + return 0; +} +#endif /* * Return a board's derivative model number. For example: |