diff options
| author | Marx Wang <marx.wang@intel.com> | 2020-04-07 16:58:38 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-04-14 09:57:03 +0000 |
| commit | abc17d10d6feac38cd6c5cdecab04cedfb2bccae (patch) | |
| tree | af55c7ddae9a4d0579a2622b49aba4d84240ac90 /src/soc/intel/apollolake/chip.h | |
| parent | efc3d04af2f0cbf3d0afeceeadb1d1e09039047d (diff) | |
soc/intel/apollolake: Disable XHCI LFPS power management
Provide the option to disable XHCI LFPS power management.
If the option is set in the devicetree, the bits[7:4] in
XHCI MMIO BAR + offset 0x80A4 (PMCTRL_REG) will be updated
from default 9 to 0.
BUG=b:146768983
BRANCH=None
TEST=build coreboot with DisableXhciLfpsPM being set to 1 and flash
the image to the device. Run following command to check if
bits[7:4] is set 0:
>iotools mmio_read32 "XHCI MMIO BAR + 0x80A4"
Signed-off-by: Marx Wang <marx.wang@intel.com>
Change-Id: Ic603e3b919d8b443c6ede8bb5e46e2de07fcb856
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40255
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Diffstat (limited to 'src/soc/intel/apollolake/chip.h')
| -rw-r--r-- | src/soc/intel/apollolake/chip.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/chip.h b/src/soc/intel/apollolake/chip.h index c7974a6cd5..ac36b702ab 100644 --- a/src/soc/intel/apollolake/chip.h +++ b/src/soc/intel/apollolake/chip.h @@ -184,6 +184,14 @@ struct soc_intel_apollolake_config { * the Upd parameter VtdEnable. */ uint8_t enable_vtd; + + /* Options to disable the LFPS periodic sampling for USB3 Ports. + * Default value of PMCTRL_REG bits[7:4] is 9 which means periodic sampling + * interval is 9ms. + * Set 1 to update XHCI host MMIO BAR + PMCTRL_REG (0x80A4 bits[7:4]) to 0 + * 0:Enable (default), 1:Disable. + */ + uint8_t disable_xhci_lfps_pm; }; typedef struct soc_intel_apollolake_config config_t; |