12 Sep
2017
12 Sep
'17
12:54 p.m.
To make the Rockchip DM timer driver useful for the timing of bootstages, we need a few enhancements:
- This implements timer_get_boot_us.
- This avoids reinitialising the timer, if it has already been set up (e.g. by our TPL and SPL stages). Now, we have a single timebase ticking from TPL through the full U-Boot.
- This adds support for reading the timer even before the device-model is ready: we find the timer via /chosen/tick-timer, then read its address and clock-frequency, and finally read the timeval directly).
Signed-off-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com Reviewed-by: Simon Glass sjg@chromium.org Acked-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com
Changes in v3: None Changes in v2: None
drivers/timer/rockchip_timer.c | 72 +++++++++++++++++++++++++++++++++++++++--- 1 file changed, 67 insertions(+), 5 deletions(-)
Applied to u-boot-rockchip, thanks!