diff options
Diffstat (limited to 'meta-openbmc-machines/meta-openpower')
3 files changed, 193 insertions, 0 deletions
diff --git a/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-phosphor/chassis/vrm-control.bb b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-phosphor/chassis/vrm-control.bb new file mode 100644 index 000000000..7802403b6 --- /dev/null +++ b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-phosphor/chassis/vrm-control.bb @@ -0,0 +1,24 @@ +SUMMARY = "Witherspoon VRM Overrides" +DESCRIPTION = "Sets Witherspoon VRMs to custom voltages" +PR = "r1" + +inherit obmc-phosphor-systemd +inherit obmc-phosphor-license + +RDEPENDS_${PN} += "i2c-tools bash" + +S = "${WORKDIR}" +SRC_URI += "file://vrm-control.sh" + +do_install() { + install -d ${D}${bindir} + install -m 0755 ${WORKDIR}/vrm-control.sh ${D}${bindir}/vrm-control.sh +} + +TMPL = "vrm-control@.service" +INSTFMT = "vrm-control@{0}.service" +TGTFMT = "obmc-chassis-start@{0}.target" +FMT = "../${TMPL}:${TGTFMT}.wants/${INSTFMT}" + +SYSTEMD_SERVICE_${PN} += "${TMPL}" +SYSTEMD_LINK_${PN} += "${@compose_list(d, 'FMT', 'OBMC_CHASSIS_INSTANCES')}" diff --git a/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-phosphor/chassis/vrm-control/vrm-control.sh b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-phosphor/chassis/vrm-control/vrm-control.sh new file mode 100644 index 000000000..8035d2e15 --- /dev/null +++ b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-phosphor/chassis/vrm-control/vrm-control.sh @@ -0,0 +1,155 @@ +#!/bin/bash +# ######################################################### +# Script to run on witherspoon BMC to read/set vrm voltages + + +# ######################################################### +d2v () { +# usage: d2v <decimal volts> + +echo $1 | awk '{print $1 * 256 + .5}' | cut -d '.' -f 1 +} + + +# ######################################################### +v2d () { +# usage: v2d <hex val> + +printf " %0.3fV" `echo $1 | awk '{print $1 / 256}'` +} + + +# ######################################################### +i2d () { +# usage: i2d <hex val> <current divisor> + +# parse current mantisa and exponent +# format: SEEE ESMM MMMM MMMM +let e=$1/0x800 +let esign=e/0x10 +let m=$1\&0x07FF +let msign=m/0x0400 + +if [ $msign -eq 1 ] +then + # calc ones compliment + let m=($m^0x07FF)+1 + m="-$m" +fi +if [ $esign -eq 1 ] +then + # calc ones compliment + let e=(e^0x1F)+1 + e="-$e" +fi +printf " %0.3fA\n" `echo $m $e $2 | awk '{print ($1 * 2^$2) / $3}'` +} + + +# ######################################################### +rw_vc () { +# usage: rw_vc <bus> <addr> <current divisor> <channel> <value> + +# select channel +if [ $4 != "x" ] +then + i2cset -y $1 $2 0 $4 b +fi + +# write new voltage set point +if [ ! -e $5 ] +then + i2cset -y $1 $2 0x21 `d2v $5` w +fi + +# print voltage set point +v2d `i2cget -y $1 $2 0x21 w` + +# print voltage +v2d `i2cget -y $1 $2 0x8B w` + +# print current +i2d `i2cget -y $1 $2 0x8C w` $3 + +# default back to channel 0 +if [ $4 != "x" ] +then + i2cset -y $1 $2 0 0 b +fi +} + + +# ######################################################### +# Main + +if [ -e $1 ] +then + $0 vdda vcsa vdna vioa vddra vppa vddb vcsb vdnb viob vddrb vppb + exit +fi + +if [ $1 == "-h" ] +then + echo " Usage: vrm [<rail>=[value] [<rail>=[value]] ...]" + echo " rail: vdda vcsa vdna vioa vddra vppa vddb vcsb vdnb viob vddrb vppb vdnd viod" + echo " value: volts" + echo + echo " e.g., vrm vioa=1.0 viob=1.0" + echo + exit +fi + +echo "rail set read current" +echo "------- ------- ------- -------" +for param in ${@:1} +do + rail=`echo $param | cut -d'=' -f 1` + val=`echo ${param}= | cut -d'=' -f 2` + echo -n "$rail" + case "$rail" in + vdda) + rw_vc 4 0x70 2 0 $val + ;; + vddb) + rw_vc 5 0x70 2 0 $val + ;; + vcsa) + rw_vc 4 0x70 4 1 $val + ;; + vcsb) + rw_vc 5 0x70 4 1 $val + ;; + vdna) + rw_vc 4 0x71 2 0 $val + ;; + vdnb) + rw_vc 5 0x71 2 0 $val + ;; + vioa) + rw_vc 4 0x40 2 x $val + ;; + viob) + rw_vc 5 0x40 2 x $val + ;; + vddra) + rw_vc 4 0x71 2 1 $val + ;; + vddrb) + rw_vc 5 0x71 2 1 $val + ;; + vppa) + rw_vc 12 0x41 2 x $val + ;; + vppb) + rw_vc 13 0x41 2 x $val + ;; + vdnd) + rw_vc 2 0x70 2 0 $val + ;; + viod) + rw_vc 2 0x70 2 1 $val + ;; + *) + echo " non-existant" + esac +done diff --git a/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-phosphor/chassis/vrm-control/vrm-control@.service b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-phosphor/chassis/vrm-control/vrm-control@.service new file mode 100644 index 000000000..716c526bf --- /dev/null +++ b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-phosphor/chassis/vrm-control/vrm-control@.service @@ -0,0 +1,14 @@ +[Unit] +Description=Apply voltage overrides to VRMs +Wants=avsbus-disable@%i.service +After=avsbus-disable@%i.service +Before=avsbus-enable@%i.service +Conflicts=obmc-chassis-stop@%i.target + +[Service] +ExecStart={bindir}/vrm-control.sh vdna=0.9 vddra=1.35 vdnb=0.9 vddrb=1.35 +Type=oneshot +RemainAfterExit=yes + +[Install] +WantedBy=obmc-chassis-start@%i.target |
