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@@ -6,6 +6,10 @@ Supported chips:
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Prefix: 'ltc2974'
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Addresses scanned: -
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Datasheet: http://www.linear.com/product/ltc2974
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+ * Linear Technology LTC2977
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+ Prefix: 'ltc2977'
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+ Addresses scanned: -
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+ Datasheet: http://www.linear.com/product/ltc2977
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* Linear Technology LTC2978
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Prefix: 'ltc2978'
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Addresses scanned: -
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@@ -26,8 +30,9 @@ Description
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-----------
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LTC2974 is a quad digital power supply manager. LTC2978 is an octal power supply
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-monitor. LTC3880 is a dual output poly-phase step-down DC/DC controller. LTC3883
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-is a single phase step-down DC/DC controller.
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+monitor. LTC2977 is a pin compatible replacement for LTC2978. LTC3880 is a dual
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+output poly-phase step-down DC/DC controller. LTC3883 is a single phase
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+step-down DC/DC controller.
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Usage Notes
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@@ -49,21 +54,25 @@ Sysfs attributes
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in1_label "vin"
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in1_input Measured input voltage.
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in1_min Minimum input voltage.
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-in1_max Maximum input voltage. LTC2974 and LTC2978 only.
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-in1_lcrit Critical minimum input voltage. LTC2974 and LTC2978
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- only.
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+in1_max Maximum input voltage.
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+ LTC2974, LTC2977, and LTC2978 only.
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+in1_lcrit Critical minimum input voltage.
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+ LTC2974, LTC2977, and LTC2978 only.
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in1_crit Critical maximum input voltage.
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in1_min_alarm Input voltage low alarm.
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-in1_max_alarm Input voltage high alarm. LTC2974 and LTC2978 only.
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-in1_lcrit_alarm Input voltage critical low alarm. LTC2974 and LTC2978
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- only.
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+in1_max_alarm Input voltage high alarm.
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+ LTC2974, LTC2977, and LTC2978 only.
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+in1_lcrit_alarm Input voltage critical low alarm.
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+ LTC2974, LTC2977, and LTC2978 only.
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in1_crit_alarm Input voltage critical high alarm.
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-in1_lowest Lowest input voltage. LTC2974 and LTC2978 only.
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+in1_lowest Lowest input voltage.
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+ LTC2974, LTC2977, and LTC2978 only.
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in1_highest Highest input voltage.
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in1_reset_history Reset input voltage history.
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in[N]_label "vout[1-8]".
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LTC2974: N=2-5
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+ LTC2977: N=2-9
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LTC2978: N=2-9
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LTC3880: N=2-3
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LTC3883: N=2
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@@ -83,21 +92,23 @@ in[N]_reset_history Reset output voltage history.
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temp[N]_input Measured temperature.
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On LTC2974, temp[1-4] report external temperatures,
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and temp5 reports the chip temperature.
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- On LTC2978, only one temperature measurement is
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- supported and reports the chip temperature.
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+ On LTC2977 and LTC2978, only one temperature measurement
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+ is supported and reports the chip temperature.
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On LTC3880, temp1 and temp2 report external
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temperatures, and temp3 reports the chip temperature.
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On LTC3883, temp1 reports an external temperature,
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and temp2 reports the chip temperature.
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-temp[N]_min Mimimum temperature. LTC2974 and LTC2978 only.
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+temp[N]_min Mimimum temperature. LTC2974, LCT2977, and LTC2978 only.
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temp[N]_max Maximum temperature.
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temp[N]_lcrit Critical low temperature.
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temp[N]_crit Critical high temperature.
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-temp[N]_min_alarm Temperature low alarm. LTC2974 and LTC2978 only.
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+temp[N]_min_alarm Temperature low alarm.
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+ LTC2974, LTC2977, and LTC2978 only.
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temp[N]_max_alarm Temperature high alarm.
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temp[N]_lcrit_alarm Temperature critical low alarm.
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temp[N]_crit_alarm Temperature critical high alarm.
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-temp[N]_lowest Lowest measured temperature. LTC2974 and LTC2978 only.
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+temp[N]_lowest Lowest measured temperature.
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+ LTC2974, LTC2977, and LTC2978 only.
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Not supported for chip temperature sensor on LTC2974.
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temp[N]_highest Highest measured temperature. Not supported for chip
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temperature sensor on LTC2974.
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@@ -109,6 +120,7 @@ power1_input Measured input power.
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power[N]_label "pout[1-4]".
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LTC2974: N=1-4
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+ LTC2977: Not supported
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LTC2978: Not supported
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LTC3880: N=1-2
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LTC3883: N=2
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@@ -123,6 +135,7 @@ curr1_reset_history Reset input current history. LTC3883 only.
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curr[N]_label "iout[1-4]".
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LTC2974: N=1-4
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+ LTC2977: not supported
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LTC2978: not supported
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LTC3880: N=2-3
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LTC3883: N=2
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