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| author | Ivan Mikhaylov <i.mikhaylov@yadro.com> | 2019-08-28 13:24:01 +0300 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@linux-watchdog.org> | 2019-09-17 09:59:13 +0300 |
| commit | 3d9e89bda9e9f01d55ff72f58d619e77d0c5b248 (patch) | |
| tree | bc133ab7d038785b930a0acc2647744911f91271 /drivers/misc/sgi-gru/grukservices.c | |
| parent | e07a4c79ca75bf41d73ba74c06f7220cd2741bc9 (diff) | |
| download | linux-3d9e89bda9e9f01d55ff72f58d619e77d0c5b248.tar.xz | |
watchdog: aspeed: add support for dual boot
Set WDT_CLEAR_TIMEOUT_AND_BOOT_CODE_SELECTION into WDT_CLEAR_TIMEOUT_STATUS
to clear out boot code source and re-enable access to the primary SPI flash
chip while booted via wdt2 from the alternate chip.
AST2400 datasheet says:
"In the 2nd flash booting mode, all the address mapping to CS0# would be
re-directed to CS1#. And CS0# is not accessible under this mode. To access
CS0#, firmware should clear the 2nd boot mode register in the WDT2 status
register WDT30.bit[1]."
Signed-off-by: Ivan Mikhaylov <i.mikhaylov@yadro.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20190828102402.13155-4-i.mikhaylov@yadro.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Diffstat (limited to 'drivers/misc/sgi-gru/grukservices.c')
0 files changed, 0 insertions, 0 deletions