diff options
| author | Sumeet Pawnikar <sumeet.r.pawnikar@intel.com> | 2022-03-14 17:13:33 +0530 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-06-10 13:12:45 +0000 |
| commit | edbbabcbe7d3f3dd4e636ab7f363b22687c0399e (patch) | |
| tree | 6e6f0fbc82a83d7315ff49231e2040ba249d3add /src/ec/google | |
| parent | 8d2bfbce23f6ff53cd8014286645a408886549a1 (diff) | |
ec/google/chromeec: Add support to report fan speed via ACPI
Add fan speed rpm control for DPTF based Active2 policy as per
document #626708, by utilizing existing FAN0 variable from
src/ec/google/chromeec/acpi/emem.asl#18.
There is no corresponding EC change required for this policy
support because EC fan code already exporting this rpm value
using EC_MEMMAP_FAN for FAN0.
BUG=b:224457192
BRANCH=None
TEST=Built and booted on ADL-P based Brya system and
verify the fan speed in rpm under sysfs path
cat /sys/bus/acpi/devices/INTC1048\:00/fan_speed_rpm.
Change-Id: Ibb1646b1fb1659fd853ece97d97bb9dee2a3f57e
Signed-off-by: Sumeet Pawnikar <sumeet.r.pawnikar@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62789
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Diffstat (limited to 'src/ec/google')
| -rw-r--r-- | src/ec/google/chromeec/ec_dptf_helpers.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/ec/google/chromeec/ec_dptf_helpers.c b/src/ec/google/chromeec/ec_dptf_helpers.c index 94b13fb5d1..1238bcfbec 100644 --- a/src/ec/google/chromeec/ec_dptf_helpers.c +++ b/src/ec/google/chromeec/ec_dptf_helpers.c @@ -109,6 +109,12 @@ static void write_fan_fst(const struct device *ec) acpigen_emit_namestring("TFST"); acpigen_write_integer(1); acpigen_emit_byte(ZERO_OP); /* 3rd arg to Index */ + acpigen_write_store(); + acpigen_emit_namestring(acpi_device_path_join(ec, "FAN0")); + acpigen_emit_byte(INDEX_OP); + acpigen_emit_namestring("TFST"); + acpigen_write_integer(2); + acpigen_emit_byte(ZERO_OP); acpigen_emit_byte(RETURN_OP); acpigen_emit_namestring("TFST"); acpigen_pop_len(); /* Method _FST */ |