[v3,0/4] watchdog: cadence_wdt: Support all available prescaler values

Message

Tomas Melin July 9, 2019, 8:09 p.m. UTC

Cadence watchdog HW supports prescaler values of 8, 64, 512 and 4096,
currently only 512 and 4096 are used by driver.

This series adds support to select prescaler values of 8 and 64 for
lower input clock frequencies.

Changes v3:
- Rebased on v5.2
- Move entire clock init block earlier in probe
- Add check for clock rate not being 0
- Add clock rate in error message

Changes v2:
- Add calculation of actual min/max timeout values
- Validate input clock frequencies to not allow
  frequencies that would result in timeout granularity
  of > 1 second.

Tomas Melin (4):
  watchdog: cadence_wdt: Move clock detection eariler in probe
  watchdog: cadence_wdt: Calculate actual timeout limits
  watchdog: cadence_wdt: Group struct member init statements
  watchdog: cadence_wdt: Support all available prescaler values

 drivers/watchdog/cadence_wdt.c | 65 ++++++++++++++++++++--------------
 1 file changed, 38 insertions(+), 27 deletions(-)