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authorhotran <hotran@apm.com>2016-07-21 15:37:32 -0700
committerGuenter Roeck <linux@roeck-us.net>2016-09-08 21:34:16 -0700
commited42cfa881e1d8d9603b7cb872199e3c8e0d1b19 (patch)
tree2cb25d6d7b444c57fa2442c2136cb3a7c150a07b /Documentation/hwmon
parent86430c1a66fe490fc97b0970575c223e27dee49d (diff)
downloadlinux-ed42cfa881e1d8d9603b7cb872199e3c8e0d1b19.tar.bz2
hwmon: Add xgene hwmon driver
This patch adds hardware temperature and power reading support for APM X-Gene SoC using the mailbox communication interface. Signed-off-by: Hoan Tran <hotran@apm.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon')
-rw-r--r--Documentation/hwmon/xgene-hwmon30
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diff --git a/Documentation/hwmon/xgene-hwmon b/Documentation/hwmon/xgene-hwmon
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+Kernel driver xgene-hwmon
+========================
+
+Supported chips:
+ * APM X-Gene SoC
+
+Description
+-----------
+
+This driver adds hardware temperature and power reading support for
+APM X-Gene SoC using the mailbox communication interface.
+For device tree, it is the standard DT mailbox.
+For ACPI, it is the PCC mailbox.
+
+The following sensors are supported
+
+ * Temperature
+ - SoC on-die temperature in milli-degree C
+ - Alarm when high/over temperature occurs
+ * Power
+ - CPU power in uW
+ - IO power in uW
+
+sysfs-Interface
+---------------
+
+temp0_input - SoC on-die temperature (milli-degree C)
+temp0_critical_alarm - An 1 would indicates on-die temperature exceeded threshold
+power0_input - CPU power in (uW)
+power1_input - IO power in (uW)