diff options
| author | Ravi Sarawadi <ravishankar.sarawadi@intel.com> | 2015-08-11 14:06:15 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-09-08 11:48:09 +0000 |
| commit | a5d98889bd5c3da0fec73dee0070338abf9b8dea (patch) | |
| tree | 62733c57a82de521ed92497c5ed486d45e0bf195 /src | |
| parent | 17ba9445e5268d1005103966f968b5c2255f51b1 (diff) | |
| download | coreboot-a5d98889bd5c3da0fec73dee0070338abf9b8dea.tar.xz | |
braswell: Tristate CFIO 139 and CFIO 140
CFIO 139 and CFIO 140 are consuming ~5 during stanndby. The reason
for this leakage is internally it is configured to 1K PU. So there
is leakage of ~2mW in standby. Total impact ~2.5 mw in Srandby.
Configure these CFIOs as tristate for ~5mW power saving at platform
level.
BRANCH=none
TEST=PnP Team to verify that the CFIO's are tri-stated.
Change-Id: I6d78d2ccc08167b2cd6fc3405cfcb5c69a77d4b8
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: f11eb98cb36c504dfebe6f0fa53e9af120d21f24
Original-Change-Id: Ib309ad0c6abffa4515fdf2a2f2d9174fad7f8e8d
Original-Signed-off-by: Hannah Williams <hannah.williams@intel.com>
Original-Signed-off-by: Ravishankar Sarawadi <ravishankar.sarawadi@intel.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/292863
Original-Commit-Ready: Rajmohan Mani <rajmohan.mani@intel.com>
Original-Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/11556
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/intel/braswell/include/soc/gpio.h | 2 | ||||
| -rw-r--r-- | src/soc/intel/braswell/smihandler.c | 6 |
2 files changed, 8 insertions, 0 deletions
diff --git a/src/soc/intel/braswell/include/soc/gpio.h b/src/soc/intel/braswell/include/soc/gpio.h index 5dda732ea0..3cc5cf0fcf 100644 --- a/src/soc/intel/braswell/include/soc/gpio.h +++ b/src/soc/intel/braswell/include/soc/gpio.h @@ -110,6 +110,8 @@ #define MMC1_D7_MMIO_OFFSET GPIO_OFFSET(68) #define HV_DDI2_DDC_SDA_MMIO_OFFSET GPIO_OFFSET(62) #define HV_DDI2_DDC_SCL_MMIO_OFFSET GPIO_OFFSET(67) +#define CFIO_139_MMIO_OFFSET GPIO_OFFSET(64) +#define CFIO_140_MMIO_OFFSET GPIO_OFFSET(67) /* GPIO Security registers offset */ #define GPIO_READ_ACCESS_POLICY_REG 0x0000 diff --git a/src/soc/intel/braswell/smihandler.c b/src/soc/intel/braswell/smihandler.c index eb8ee63ff1..576e1182c2 100644 --- a/src/soc/intel/braswell/smihandler.c +++ b/src/soc/intel/braswell/smihandler.c @@ -127,6 +127,12 @@ static void tristate_gpios(uint32_t val) HV_DDI2_DDC_SDA_MMIO_OFFSET, val); write32((void *)COMMUNITY_GPNORTH_BASE + HV_DDI2_DDC_SCL_MMIO_OFFSET, val); + + /* Tri-state CFIO 139 and 140 */ + write32((void *)COMMUNITY_GPSOUTHWEST_BASE + + CFIO_139_MMIO_OFFSET, val); + write32((void *)COMMUNITY_GPSOUTHWEST_BASE + + CFIO_140_MMIO_OFFSET, val); } |