tree 72cead037569195d15aa63061b7e0a404e02f3fd
parent 90b1604256abe7d55a584b41eba53dd3568b8a90
author Phil Edworthy <PHIL.EDWORTHY@renesas.com> 1487319737 +0000
committer Tom Rini <trini@konsulko.com> 1489538418 -0400

armv7m: Add SysTick timer driver

The SysTick is a 24-bit down counter that is found on all ARM Cortex
M3, M4, M7 devices and is always located at a fixed address.

The number of reference clock ticks that correspond to 10ms is normally
defined in the SysTick Calibration register's TENMS field. However, on some
devices this is wrong, so this driver allows the clock rate to be defined
using CONFIG_SYS_HZ_CLOCK.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Reviewed-by: Vikas MANOCHA <vikas.manocha@st.com>