diff options
| author | Duncan Laurie <dlaurie@chromium.org> | 2017-03-14 16:40:06 -0700 |
|---|---|---|
| committer | Duncan Laurie <dlaurie@chromium.org> | 2017-03-15 19:45:55 +0100 |
| commit | 86db46987176b6e78852d62042046e4af458e71a (patch) | |
| tree | 997918d0a0efd51d82ef969e5eed2b14dcc7f474 | |
| parent | 4fa8a6f4fefe04eaa1579c03d36abf0fbc9a27f7 (diff) | |
intel/skylake: Support for setting AC/DC loadline
Add options to set the AC and DC loadline values for each supported
VR type so these can be tuned on a per-board basis in devicetree.cb.
BUG=b:36228330
BRANCH=none
TEST=Build and boot on Eve and check debug FSP output to ensure that
it is applying the provided loadline values
Change-Id: I2a5533d2c9fd86351c86584e3738e80ac4c1f915
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/18819
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
| -rw-r--r-- | src/soc/intel/skylake/include/soc/vr_config.h | 4 | ||||
| -rw-r--r-- | src/soc/intel/skylake/vr_config.c | 5 |
2 files changed, 9 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/include/soc/vr_config.h b/src/soc/intel/skylake/include/soc/vr_config.h index 27d84b2629..66b4a01ad4 100644 --- a/src/soc/intel/skylake/include/soc/vr_config.h +++ b/src/soc/intel/skylake/include/soc/vr_config.h @@ -61,6 +61,10 @@ struct vr_config { /* VR Voltage Limit. Range is 0-7999mV */ int voltage_limit; + + /* AC and DC Loadline in 1/100 mOhms. Range is 0-6249 */ + int ac_loadline; + int dc_loadline; }; #define VR_CFG_AMP(i) ((i) * 4) diff --git a/src/soc/intel/skylake/vr_config.c b/src/soc/intel/skylake/vr_config.c index 36c2f1f403..cfbd796584 100644 --- a/src/soc/intel/skylake/vr_config.c +++ b/src/soc/intel/skylake/vr_config.c @@ -109,4 +109,9 @@ void fill_vr_domain_config(void *params, vr_params->ImonOffset[domain] = cfg->imon_offset; vr_params->IccMax[domain] = cfg->icc_max; vr_params->VrVoltageLimit[domain] = cfg->voltage_limit; + +#if IS_ENABLED(CONFIG_PLATFORM_USES_FSP2_0) + vr_params->AcLoadline[domain] = cfg->ac_loadline; + vr_params->DcLoadline[domain] = cfg->dc_loadline; +#endif } |