diff options
| author | Jacky Bai <[email protected]> | 2022-08-25 16:32:51 +0800 |
|---|---|---|
| committer | Wim Van Sebroeck <[email protected]> | 2022-10-02 12:55:44 +0200 |
| commit | 6371593fbad75cfb9ee14e8b462a5ebb1aa38c02 (patch) | |
| tree | 2567f47141eaf5e5925bac663127cca15cd43172 /tools/testing/selftests/bpf/prog_tests/prog_array_init.c | |
| parent | f182683333b5d8ac4af64517b6e3c444c4579e6e (diff) | |
watchdog: imx7ulp: Add explict memory barrier for unlock sequence
When reconfiguring the WDOG Timer of i.MX7ULP, there is a certain
probability causes it to reset. The reason is that the CMD32EN of the
WDOG Timer of i.MX7ULP is disabled in bootloader. The unlock sequence
are two 16-bit writes to the CNT register within 16 bus clocks. Adding
mb() is to guarantee that two 16-bit writes are finished within 16 bus
clocks. Memory barriers cannot be added between these two 16-bit writes
so that writel_relaxed is used.
Suggested-by: Ye Li <[email protected]>
Signed-off-by: Jacky Bai <[email protected]>
Signed-off-by: Alice Guo <[email protected]>
Reviewed-by: Ye Li <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
Signed-off-by: Wim Van Sebroeck <[email protected]>
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/prog_array_init.c')
0 files changed, 0 insertions, 0 deletions