Hi Andrew, On 6/17/20 3:18 AM, Andrew Jeffery wrote: > On Tue, 16 Jun 2020, at 17:21, Philippe Mathieu-Daudé wrote: >> The current implementation uses nano-second precision, while >> the watchdog can not be more precise than a micro-second. > > What's the basis for this assertion? It's true for the AST2500 and AST2600, > but > the AST2400 can run the watchdog from either a 1MHz clock source or the APB > clock (which must be at least 16.5MHz on palmetto). The reset state on the > AST2400 configures the watchdog for the APB clock rate. > > The Linux driver will eventually configure the watchdog for 1MHz mode > regardless so perhaps the AST2400 reset state is a bit of a corner case, but > I feel the assertion should be watered down a bit?
What about this description? "The current implementation uses nano-second precision, but is not more precise than micro-second precision. Simplify by using a micro-second based timer. Rename the timer 'timer_us' to have the unit explicit." > > Andrew >
