diff options
| author | Lijian Zhao <lijian.zhao@intel.com> | 2019-03-13 10:52:49 -0700 |
|---|---|---|
| committer | Duncan Laurie <dlaurie@chromium.org> | 2019-03-29 14:55:54 +0000 |
| commit | 009e6cbf842ae1e28231d8e864403c68857c337a (patch) | |
| tree | f44780887e102d7eca5d2015b866aa4eb13984b3 /src/soc/intel/cannonlake/fsp_params.c | |
| parent | 06d0705834efc74281ccad7b8958b0e24dc2c701 (diff) | |
soc/intel/cannonlake: Ignore GBE LTR
Ignore integrated GBE controller LTR setting to make it wake up from
s0ix with 10/100M cable attached.
BUG=b:122435844
TEST= Test on sarien platorm, after the changes sytem can wake by WOL,
and also checked SLP_S0 residency can increase with 10/100M cable
and battery connected.
Signed-off-by: Lijian Zhao <lijian.zhao@intel.com>
Change-Id: Iec7dd197b8a456751f8e4dcb19e3e153f5888613
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31888
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Diffstat (limited to 'src/soc/intel/cannonlake/fsp_params.c')
| -rw-r--r-- | src/soc/intel/cannonlake/fsp_params.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/soc/intel/cannonlake/fsp_params.c b/src/soc/intel/cannonlake/fsp_params.c index 6173403395..25ee5e1ebe 100644 --- a/src/soc/intel/cannonlake/fsp_params.c +++ b/src/soc/intel/cannonlake/fsp_params.c @@ -107,6 +107,17 @@ static void parse_devicetree(FSP_S_CONFIG *params) parse_devicetree_param(config, params); } +/* Ignore LTR value for GBE devices */ +static void ignore_gbe_ltr(void) +{ + uint8_t reg8; + uint8_t *pmcbase = pmc_mmio_regs(); + + reg8 = read8(pmcbase + LTR_IGN); + reg8 |= IGN_GBE; + write8(pmcbase + LTR_IGN, reg8); +} + /* UPD parameters to be initialized before SiliconInit */ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd) { @@ -168,6 +179,7 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd) params->PchPmSlpS0VmRuntimeControl = 0; params->PchPmSlpS0Vm070VSupport = 0; params->PchPmSlpS0Vm075VSupport = 0; + ignore_gbe_ltr(); } } |