From 4cdb562147467b3530e86c7c51c3fbffe3067c09 Mon Sep 17 00:00:00 2001 From: Lucas Tanure Date: Thu, 28 Mar 2019 13:09:37 +0000 Subject: hwmon: lochnagar: Add Lochnagar 2 hardware monitoring driver Lochnagar is an evaluation and development board for Cirrus Logic Smart CODEC and Amp devices. It allows the connection of most Cirrus Logic devices on mini-cards, as well as allowing connection of various application processor systems to provide a full evaluation platform. This driver adds support for the hardware monitoring features of the Lochnagar 2 to the hwmon API. Monitoring is provided for the board voltages, currents and temperature supported by the board controller chip. Signed-off-by: Lucas Tanure Signed-off-by: Charles Keepax Signed-off-by: Guenter Roeck --- Documentation/hwmon/lochnagar | 80 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 Documentation/hwmon/lochnagar (limited to 'Documentation/hwmon') diff --git a/Documentation/hwmon/lochnagar b/Documentation/hwmon/lochnagar new file mode 100644 index 000000000000..e9686fb3eb40 --- /dev/null +++ b/Documentation/hwmon/lochnagar @@ -0,0 +1,80 @@ +Kernel Driver Lochnagar +======================== + +Supported systems: + * Cirrus Logic : Lochnagar 2 + +Author: Lucas A. Tanure Alves + +Description +----------- + +Lochnagar 2 features built-in Current Monitor circuitry that allows for the +measurement of both voltage and current on up to eight of the supply voltage +rails provided to the minicards. The Current Monitor does not require any +hardware modifications or external circuitry to operate. + +The current and voltage measurements are obtained through the standard register +map interface to the Lochnagar board controller, and can therefore be monitored +by software. + +Sysfs attributes +---------------- + +temp1_input The Lochnagar board temperature (milliCelsius) +in0_input Measured voltage for DBVDD1 (milliVolts) +in0_label "DBVDD1" +curr1_input Measured current for DBVDD1 (milliAmps) +curr1_label "DBVDD1" +power1_average Measured average power for DBVDD1 (microWatts) +power1_average_interval Power averaging time input valid from 1 to 1708mS +power1_label "DBVDD1" +in1_input Measured voltage for 1V8 DSP (milliVolts) +in1_label "1V8 DSP" +curr2_input Measured current for 1V8 DSP (milliAmps) +curr2_label "1V8 DSP" +power2_average Measured average power for 1V8 DSP (microWatts) +power2_average_interval Power averaging time input valid from 1 to 1708mS +power2_label "1V8 DSP" +in2_input Measured voltage for 1V8 CDC (milliVolts) +in2_label "1V8 CDC" +curr3_input Measured current for 1V8 CDC (milliAmps) +curr3_label "1V8 CDC" +power3_average Measured average power for 1V8 CDC (microWatts) +power3_average_interval Power averaging time input valid from 1 to 1708mS +power3_label "1V8 CDC" +in3_input Measured voltage for VDDCORE DSP (milliVolts) +in3_label "VDDCORE DSP" +curr4_input Measured current for VDDCORE DSP (milliAmps) +curr4_label "VDDCORE DSP" +power4_average Measured average power for VDDCORE DSP (microWatts) +power4_average_interval Power averaging time input valid from 1 to 1708mS +power4_label "VDDCORE DSP" +in4_input Measured voltage for AVDD 1V8 (milliVolts) +in4_label "AVDD 1V8" +curr5_input Measured current for AVDD 1V8 (milliAmps) +curr5_label "AVDD 1V8" +power5_average Measured average power for AVDD 1V8 (microWatts) +power5_average_interval Power averaging time input valid from 1 to 1708mS +power5_label "AVDD 1V8" +curr6_input Measured current for SYSVDD (milliAmps) +curr6_label "SYSVDD" +power6_average Measured average power for SYSVDD (microWatts) +power6_average_interval Power averaging time input valid from 1 to 1708mS +power6_label "SYSVDD" +in6_input Measured voltage for VDDCORE CDC (milliVolts) +in6_label "VDDCORE CDC" +curr7_input Measured current for VDDCORE CDC (milliAmps) +curr7_label "VDDCORE CDC" +power7_average Measured average power for VDDCORE CDC (microWatts) +power7_average_interval Power averaging time input valid from 1 to 1708mS +power7_label "VDDCORE CDC" +in7_input Measured voltage for MICVDD (milliVolts) +in7_label "MICVDD" +curr8_input Measured current for MICVDD (milliAmps) +curr8_label "MICVDD" +power8_average Measured average power for MICVDD (microWatts) +power8_average_interval Power averaging time input valid from 1 to 1708mS +power8_label "MICVDD" + +Note: It is not possible to measure voltage on the SYSVDD rail. -- cgit v1.2.3-55-g7522