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google/gru: Add new PWM regulator duty numbers for revision 6

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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: I8757cc54f2478d20bb948a1a0a7398b0404a7b1f
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/368410
Commit-Ready: Dan Shi <dshi@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
This commit is contained in:
Julius Werner 2016-08-11 16:37:57 -07:00 • committed by chrome-bot
parent 853295a7f1
commit 4cb2a93929
1 changed files with 12 additions and 0 deletions
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12
src/soc/rockchip/rk3399/romstage.c
View file

@ -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++)