ep93xx timer: Simplified the timer code by eliminating clk_to_systicks() and
performing (almost) all manipulation of the timer structure in read_timer()
Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
ep93xx timer: Renamed pointers to struct timer_regs from name 'timer' to
'timer_regs' in order to avoid confusion with the global variable 'timer'
Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
ep93xx timer: Make get_ticks() return a value in CONFIG_SYS_HZ resolution,
as announced by get_tbclk()
Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
ep93xx timer: Use 64-bit values in usecs_to_ticks() in order to avoid
overflows in intermediate values
Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
ep93xx: Refactoring of the timer code, including the following changes
* use a free running timer instead of a periodical one
* use unsigned long long for total number of ticks
* hold the timer state in a structure instead of separate variables
* increment the timer counter instead of decrementing it
* remove unused function udelay_masked()
* remove unused function set_timer()
Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
ep93xx: Use unsigned long long for calculation of sys ticks in clk_to_systicks()
for proper handling of large intermediate values
Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
