Changes between Version 17 and Version 18 of gsc

Timestamp:

07/06/2018 04:12:10 PM (6 years ago)

Author:

Tim Harvey

Comment:

add note about GSC v3 hwmon temperature units

gsc

@@ -138 +138 @@
  2. Consult individual board hardware manual or the Linux device-tree for a description of what voltage rail this is and what voltage divider is applied in order to scale it. The Newport Linux kernel and BDK use information from the Linux Device-tree to scale and name these ADC's
 
+A Linux 'Hardware Monitor' ({{{hwmon}}}) driver is available  which provides simple standard access to the above temperature/voltage registers via sysfs. The arguments have been given labels which define the source. The user can “cat” the label to determine the source.
+
+Note that the standard sysfs entries for hwmon drivers are such that temperatures are in millidegrees celcius and voltages are in millivolts.
+
+
 
 [=#hwmon_v1_v2]
-=== GSC v1/v2 (Laguna/Ventana)
+=== GSC v1/v2 (!Laguna/Ventana)
 A single temperature sensor provides the board temperature in a 16-bit value (MSB first, LSB second) at register offset 0x00 in degrees Celcius. The voltage based ADC inputs provides a voltage (millivolt) as a 24-bit value (MSB first, LSB last). The ADC measurements are performed once per second (1Hz).
 
@@ -236 +241 @@
 Combining 0x01 and 0xc0, is 0x01c0, which comes out to be 448, which divided by 10, equals 44.8 Deg. C.
 
-
 For Ventana i.MX6 processor temperature, see [wiki:ventana/thermal here]
+
 
 [=#fan]
@@ -440 +445 @@
 
 === EEPROM Secure Key Example ===
-The secure key area starts at 0x51 offset 0x80 and extends for 96 bytes for GSC v1/v2 (Laguna/Ventana) and for 128 bytes for GSC v2 (Newport).
+The secure key area starts at 0x51 offset 0x80 and extends for 96 bytes for GSC v1/v2 (!Laguna/Ventana) and for 128 bytes for GSC v2 (Newport).
 
 To see the secure key, you can use the command i2cdump from the command line: (starts with the ASCII values of D3 and ends with w in below example)