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authorGuenter Roeck <linux@roeck-us.net>2015-06-08 09:56:20 -0700
committerGuenter Roeck <linux@roeck-us.net>2015-08-17 11:55:55 -0700
commit649ca820dab3d76e12408b74af3e8e97abb07ae0 (patch)
tree20d6e9797f112f6af616b532b809fd3dd1fd4d2d /Documentation
parent15398566f0ea95c66d202b8705dba4f59b9ba01c (diff)
hwmon: (ltc2978) Add support for LTC2975
LTC2975 is mostly compatible to LTC2974, but supports input current and power measurement. Tested-by: Michael Jones <mike@proclivis.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/hwmon/ltc2978.txt3
-rw-r--r--Documentation/hwmon/ltc297847
2 files changed, 29 insertions, 21 deletions
diff --git a/Documentation/devicetree/bindings/hwmon/ltc2978.txt b/Documentation/devicetree/bindings/hwmon/ltc2978.txt
index c1d23c14ddd9..e434d5fba2ae 100644
--- a/Documentation/devicetree/bindings/hwmon/ltc2978.txt
+++ b/Documentation/devicetree/bindings/hwmon/ltc2978.txt
@@ -3,6 +3,7 @@ ltc2978
Required properties:
- compatible: should contain one of:
* "lltc,ltc2974"
+ * "lltc,ltc2975"
* "lltc,ltc2977"
* "lltc,ltc2978"
* "lltc,ltc3880"
@@ -19,7 +20,7 @@ Optional properties:
standard binding for regulators; see regulator.txt.
Valid names of regulators depend on number of supplies supported per device:
- * ltc2974 : vout0 - vout3
+ * ltc2974, ltc2975 : vout0 - vout3
* ltc2977 : vout0 - vout7
* ltc2978 : vout0 - vout7
* ltc3880, ltc3882 : vout0 - vout1
diff --git a/Documentation/hwmon/ltc2978 b/Documentation/hwmon/ltc2978
index ff130997f22e..7e982884e359 100644
--- a/Documentation/hwmon/ltc2978
+++ b/Documentation/hwmon/ltc2978
@@ -6,6 +6,10 @@ Supported chips:
Prefix: 'ltc2974'
Addresses scanned: -
Datasheet: http://www.linear.com/product/ltc2974
+ * Linear Technology LTC2975
+ Prefix: 'ltc2975'
+ Addresses scanned: -
+ Datasheet: http://www.linear.com/product/ltc2975
* Linear Technology LTC2977
Prefix: 'ltc2977'
Addresses scanned: -
@@ -42,7 +46,7 @@ Author: Guenter Roeck <linux@roeck-us.net>
Description
-----------
-LTC2974 is a quad digital power supply managers.
+LTC2974 and LTC2975 are quad digital power supply managers.
LTC2978 is an octal power supply monitor.
LTC2977 is a pin compatible replacement for LTC2978.
LTC3880, LTC3882, and LTC3887 are dual output poly-phase step-down DC/DC
@@ -71,23 +75,23 @@ in1_label "vin"
in1_input Measured input voltage.
in1_min Minimum input voltage.
in1_max Maximum input voltage.
- LTC2974, LTC2977, and LTC2978 only.
+ LTC2974, LTC2975, LTC2977, and LTC2978 only.
in1_lcrit Critical minimum input voltage.
- LTC2974, LTC2977, and LTC2978 only.
+ LTC2974, LTC2975, LTC2977, and LTC2978 only.
in1_crit Critical maximum input voltage.
in1_min_alarm Input voltage low alarm.
in1_max_alarm Input voltage high alarm.
- LTC2974, LTC2977, and LTC2978 only.
+ LTC2974, LTC2975, LTC2977, and LTC2978 only.
in1_lcrit_alarm Input voltage critical low alarm.
- LTC2974, LTC2977, and LTC2978 only.
+ LTC2974, LTC2975, LTC2977, and LTC2978 only.
in1_crit_alarm Input voltage critical high alarm.
in1_lowest Lowest input voltage.
- LTC2974, LTC2977, and LTC2978 only.
+ LTC2974, LTC2975, LTC2977, and LTC2978 only.
in1_highest Highest input voltage.
in1_reset_history Reset input voltage history.
in[N]_label "vout[1-8]".
- LTC2974: N=2-5
+ LTC2974, LTC2975: N=2-5
LTC2977: N=2-9
LTC2978: N=2-9
LTC3880, LTC3882, LTC3887, LTM4676: N=2-3
@@ -101,13 +105,14 @@ 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]_lowest Lowest output voltage. LTC2974, LTC2975,
+ 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 LTC2974 and LTC2975, temp[1-4] report external
+ temperatures, and temp5 reports the chip temperature.
On LTC2977 and LTC2978, only one temperature measurement
is supported and reports the chip temperature.
On LTC3880, LTC3882, LTC3887, and LTM4676, temp1 and
@@ -120,23 +125,24 @@ 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, LTC2977, and LTC2978 only.
+ LTC2974, LTC2975, LTC2977, 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, LTC2977, and LTC2978 only.
- Not supported for chip temperature sensor on LTC2974.
+ LTC2974, LTC2975, LTC2977, and LTC2978 only.
+ Not supported for chip temperature sensor on LTC2974 and
+ LTC2975.
temp[N]_highest Highest measured temperature. Not supported for chip
- temperature sensor on LTC2974.
+ temperature sensor on LTC2974 and LTC2975.
temp[N]_reset_history Reset temperature history. Not supported for chip
- temperature sensor on LTC2974.
+ temperature sensor on LTC2974 and LTC2975.
power1_label "pin". LTC3883 only.
power1_input Measured input power.
power[N]_label "pout[1-4]".
- LTC2974: N=1-4
+ LTC2974, LTC2975: N=1-4
LTC2977: Not supported
LTC2978: Not supported
LTC3880, LTC3882, LTC3887, LTM4676: N=1-2
@@ -151,7 +157,7 @@ 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
+ LTC2974, LTC2975: N=1-4
LTC2977: not supported
LTC2978: not supported
LTC3880, LTC3882, LTC3887, LTM4676: N=2-3
@@ -159,10 +165,11 @@ curr[N]_label "iout[1-4]".
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]_lcrit Critical low output current. LTC2974 and LTC2975 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]_lcrit_alarm Output current critical low alarm.
+ LTC2974 and LTC2975 only.
+curr[N]_lowest Lowest output current. LTC2974 and LTC2975 only.
curr[N]_highest Highest output current.
curr[N]_reset_history Reset output current history.