diff options
| author | Eric Gao <eric.gao@rock-chips.com> | 2016-07-29 12:34:32 +0800 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2016-08-31 20:32:43 +0200 |
| commit | 61e6c4448c4d79035842434fb1eb3b4e9cd01c6d (patch) | |
| tree | bab9931fac18fa908f3e09204e6e94803dfb8baa /src/mainboard/apple | |
| parent | 12df9505835393239d9e9589cff39a1d1dfddac1 (diff) | |
rockchip/rk3399: Add pwm_regulator.c for pwm then ramp boot up cpu
Before, we calculate the pwm duties for cpu cores and centerlogic by
hand, adding pwm_regulator.c to handle this. The default pwm design
min/max voltage may be different between revs.
With the pwm regulator, this patch changes the little cpu frequency from
600M to 1512M, and raises CPU voltage to 1.2V correspondingly.
This also means we decide to drop the ES1 because it may fail to
bootup with 1.5G ~ 1.2v.
BRANCH=none
BUG=chrome-os-partner:54376,chrome-os-partner:54862
TEST=Bootup on kevin board
Change-Id: Id04c176bddfb9cdf3d25b65736e40249a85f6aa1
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: ee4365c787ec523b7ee1028ea100dcfbb331b3a9
Original-Change-Id: Ide75bbd92d1cbb14f934baeec0e38862bc08402b
Original-Signed-off-by: Eric Gao <eric.gao@rock-chips.com>
Original-Signed-off-by: Shunqian Zheng <zhengsq@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/364410
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/16368
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/mainboard/apple')
0 files changed, 0 insertions, 0 deletions