diff options
| author | Julius Werner <jwerner@chromium.org> | 2016-08-11 16:37:57 -0700 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2016-08-17 23:11:00 +0200 |
| commit | 91f6e679ccce9cf90c98608fc2c24aef44db5bf0 (patch) | |
| tree | f1e546599f88e892464ca1270c7df7577ef53082 | |
| parent | 0bb62294ac1e792646cae28b73b2072ea8b389ee (diff) | |
google/gru: Add new PWM regulator duty numbers for revision 6
We're changing the PWM regulator bounds on Kevin from rev6 onwards, so
we'll need to use different duty cycle values for them. We really want a
proper PWM regulator driver that can calculate these values
automatically from voltages, but until we have that this patch just
hardcodes the new numbers in.
(Yes, this is a patch for the mainboard/google/gru board family that only
touches a file from the rockchip/rk3399 SoC. That too is something
that'll be fixed up in a later CL.)
BRANCH=None
BUG=chrome-os-partner:54888
TEST=Booted Kevin rev4 (for whatever that's worth...).
Change-Id: Ibb6ab5c6517d83ffb5e32cb17d0de33e8ec10293
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 4cb2a939295e2b6443c5dbd3374982224322304b
Original-Change-Id: I8757cc54f2478d20bb948a1a0a7398b0404a7b1f
Original-Signed-off-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/368410
Original-Commit-Ready: Dan Shi <dshi@chromium.org>
Original-Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-on: https://review.coreboot.org/16235
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
| -rw-r--r-- | src/soc/rockchip/rk3399/romstage.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/soc/rockchip/rk3399/romstage.c b/src/soc/rockchip/rk3399/romstage.c index 8adaa7cef6..ccf42b9b5f 100644 --- a/src/soc/rockchip/rk3399/romstage.c +++ b/src/soc/rockchip/rk3399/romstage.c @@ -79,12 +79,24 @@ static void init_dvs_outputs(void) */ duty_ns = 2860; /* 0.9v */ + /* TODO: Clean all this up, implement proper pwm_regulator driver. */ if (IS_ENABLED(CONFIG_BOARD_GOOGLE_KEVIN)) { id = board_id(); if (id <= 2) duty_ns = 1906; /* 1.1v */ else if (id == 3) duty_ns = 2621; /* 0.95v */ + else if (id >= 6) { + /* GPU: 3337 * (12043 - 9000) / (12043 - 7984) = 2501 */ + pwm_init(0, 3337, 2501); + /* BIG: 3337 * (12837 - 9000) / (12837 - 7985) = 2638 */ + pwm_init(1, 3337, 2638); + /* LIT: 3337 * (12807 - 9000) / (12807 - 8009) = 2647 */ + pwm_init(2, 3337, 2647); + /* CTR: 3337 * (10507 - 9500) / (10507 - 7996) = 1338 */ + pwm_init(3, 3337, 1338); + return; + } } for (i = 0; i < 4; i++) |