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authorEric Gao <eric.gao@rock-chips.com>2016-07-29 12:34:32 +0800
committerMartin Roth <martinroth@google.com>2016-08-31 20:32:43 +0200
commit61e6c4448c4d79035842434fb1eb3b4e9cd01c6d (patch)
treebab9931fac18fa908f3e09204e6e94803dfb8baa /src/mainboard/winent/Kconfig
parent12df9505835393239d9e9589cff39a1d1dfddac1 (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>
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