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Diffstat (limited to 'Documentation/hwmon/ltc2978')
| -rw-r--r-- | Documentation/hwmon/ltc2978 | 149 |
1 files changed, 92 insertions, 57 deletions
diff --git a/Documentation/hwmon/ltc2978 b/Documentation/hwmon/ltc2978 index c365f9beb5dd..dc0d08c61305 100644 --- a/Documentation/hwmon/ltc2978 +++ b/Documentation/hwmon/ltc2978 @@ -2,24 +2,32 @@ Kernel driver ltc2978 ===================== Supported chips: + * Linear Technology LTC2974 + Prefix: 'ltc2974' + Addresses scanned: - + Datasheet: http://www.linear.com/product/ltc2974 * Linear Technology LTC2978 Prefix: 'ltc2978' Addresses scanned: - - Datasheet: http://cds.linear.com/docs/Datasheet/2978fa.pdf + Datasheet: http://www.linear.com/product/ltc2978 * Linear Technology LTC3880 Prefix: 'ltc3880' Addresses scanned: - - Datasheet: http://cds.linear.com/docs/Datasheet/3880f.pdf + Datasheet: http://www.linear.com/product/ltc3880 + * Linear Technology LTC3883 + Prefix: 'ltc3883' + Addresses scanned: - + Datasheet: http://www.linear.com/product/ltc3883 -Author: Guenter Roeck <guenter.roeck@ericsson.com> +Author: Guenter Roeck <linux@roeck-us.net> Description ----------- -The LTC2978 is an octal power supply monitor, supervisor, sequencer and -margin controller. The LTC3880 is a dual, PolyPhase DC/DC synchronous -step-down switching regulator controller. +LTC2974 is a quad digital power supply manager. LTC2978 is an octal power supply +monitor. LTC3880 is a dual output poly-phase step-down DC/DC controller. LTC3883 +is a single phase step-down DC/DC controller. Usage Notes @@ -41,63 +49,90 @@ Sysfs attributes in1_label "vin" in1_input Measured input voltage. in1_min Minimum input voltage. -in1_max Maximum input voltage. -in1_lcrit Critical minimum input voltage. +in1_max Maximum input voltage. LTC2974 and LTC2978 only. +in1_lcrit Critical minimum input voltage. LTC2974 and LTC2978 + only. in1_crit Critical maximum input voltage. in1_min_alarm Input voltage low alarm. -in1_max_alarm Input voltage high alarm. -in1_lcrit_alarm Input voltage critical low alarm. +in1_max_alarm Input voltage high alarm. LTC2974 and LTC2978 only. +in1_lcrit_alarm Input voltage critical low alarm. LTC2974 and LTC2978 + only. in1_crit_alarm Input voltage critical high alarm. -in1_lowest Lowest input voltage. LTC2978 only. +in1_lowest Lowest input voltage. LTC2974 and LTC2978 only. in1_highest Highest input voltage. -in1_reset_history Reset history. Writing into this attribute will reset - history for all attributes. - -in[2-9]_label "vout[1-8]". Channels 3 to 9 on LTC2978 only. -in[2-9]_input Measured output voltage. -in[2-9]_min Minimum output voltage. -in[2-9]_max Maximum output voltage. -in[2-9]_lcrit Critical minimum output voltage. -in[2-9]_crit Critical maximum output voltage. -in[2-9]_min_alarm Output voltage low alarm. -in[2-9]_max_alarm Output voltage high alarm. -in[2-9]_lcrit_alarm Output voltage critical low alarm. -in[2-9]_crit_alarm Output voltage critical high alarm. -in[2-9]_lowest Lowest output voltage. LTC2978 only. -in[2-9]_highest Lowest output voltage. -in[2-9]_reset_history Reset history. Writing into this attribute will reset - history for all attributes. - -temp[1-3]_input Measured temperature. +in1_reset_history Reset input voltage history. + +in[N]_label "vout[1-8]". + LTC2974: N=2-5 + LTC2978: N=2-9 + LTC3880: N=2-3 + LTC3883: N=2 +in[N]_input Measured output voltage. +in[N]_min Minimum output voltage. +in[N]_max Maximum output voltage. +in[N]_lcrit Critical minimum output voltage. +in[N]_crit Critical maximum output voltage. +in[N]_min_alarm Output voltage low alarm. +in[N]_max_alarm Output voltage high alarm. +in[N]_lcrit_alarm Output voltage critical low alarm. +in[N]_crit_alarm Output voltage critical high alarm. +in[N]_lowest Lowest output voltage. LTC2974 and LTC2978 only. +in[N]_highest Highest output voltage. +in[N]_reset_history Reset output voltage history. + +temp[N]_input Measured temperature. + On LTC2974, temp[1-4] report external temperatures, + and temp5 reports the chip temperature. On LTC2978, only one temperature measurement is - supported and reflects the internal temperature. + supported and reports the chip temperature. On LTC3880, temp1 and temp2 report external - temperatures, and temp3 reports the internal - temperature. -temp[1-3]_min Mimimum temperature. -temp[1-3]_max Maximum temperature. -temp[1-3]_lcrit Critical low temperature. -temp[1-3]_crit Critical high temperature. -temp[1-3]_min_alarm Chip temperature low alarm. -temp[1-3]_max_alarm Chip temperature high alarm. -temp[1-3]_lcrit_alarm Chip temperature critical low alarm. -temp[1-3]_crit_alarm Chip temperature critical high alarm. -temp[1-3]_lowest Lowest measured temperature. LTC2978 only. -temp[1-3]_highest Highest measured temperature. -temp[1-3]_reset_history Reset history. Writing into this attribute will reset - history for all attributes. - -power[1-2]_label "pout[1-2]". LTC3880 only. -power[1-2]_input Measured power. - -curr1_label "iin". LTC3880 only. + temperatures, and temp3 reports the chip temperature. + On LTC3883, temp1 reports an external temperature, + and temp2 reports the chip temperature. +temp[N]_min Mimimum temperature. LTC2974 and LTC2978 only. +temp[N]_max Maximum temperature. +temp[N]_lcrit Critical low temperature. +temp[N]_crit Critical high temperature. +temp[N]_min_alarm Temperature low alarm. LTC2974 and LTC2978 only. +temp[N]_max_alarm Temperature high alarm. +temp[N]_lcrit_alarm Temperature critical low alarm. +temp[N]_crit_alarm Temperature critical high alarm. +temp[N]_lowest Lowest measured temperature. LTC2974 and LTC2978 only. + Not supported for chip temperature sensor on LTC2974. +temp[N]_highest Highest measured temperature. Not supported for chip + temperature sensor on LTC2974. +temp[N]_reset_history Reset temperature history. Not supported for chip + temperature sensor on LTC2974. + +power1_label "pin". LTC3883 only. +power1_input Measured input power. + +power[N]_label "pout[1-4]". + LTC2974: N=1-4 + LTC2978: Not supported + LTC3880: N=1-2 + LTC3883: N=2 +power[N]_input Measured output power. + +curr1_label "iin". LTC3880 and LTC3883 only. curr1_input Measured input current. curr1_max Maximum input current. curr1_max_alarm Input current high alarm. - -curr[2-3]_label "iout[1-2]". LTC3880 only. -curr[2-3]_input Measured input current. -curr[2-3]_max Maximum input current. -curr[2-3]_crit Critical input current. -curr[2-3]_max_alarm Input current high alarm. -curr[2-3]_crit_alarm Input current critical high alarm. +curr1_highest Highest input current. LTC3883 only. +curr1_reset_history Reset input current history. LTC3883 only. + +curr[N]_label "iout[1-4]". + LTC2974: N=1-4 + LTC2978: not supported + LTC3880: N=2-3 + LTC3883: N=2 +curr[N]_input Measured output current. +curr[N]_max Maximum output current. +curr[N]_crit Critical high output current. +curr[N]_lcrit Critical low output current. LTC2974 only. +curr[N]_max_alarm Output current high alarm. +curr[N]_crit_alarm Output current critical high alarm. +curr[N]_lcrit_alarm Output current critical low alarm. LTC2974 only. +curr[N]_lowest Lowest output current. LTC2974 only. +curr[N]_highest Highest output current. +curr[N]_reset_history Reset output current history. |