hwmon: Add WM835x PMIC hardware monitoring driver

This driver provides reporting of the status supply voltage rails
of the WM835x series of PMICs via the hwmon API.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/Documentation/hwmon/wm8350 b/Documentation/hwmon/wm8350
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+Kernel driver wm8350-hwmon
+==========================
+
+Supported chips:
+  * Wolfson Microelectronics WM835x PMICs
+    Prefix: 'wm8350'
+    Datasheet:
+        http://www.wolfsonmicro.com/products/WM8350
+        http://www.wolfsonmicro.com/products/WM8351
+        http://www.wolfsonmicro.com/products/WM8352
+
+Authors: Mark Brown <broonie@opensource.wolfsonmicro.com>
+
+Description
+-----------
+
+The WM835x series of PMICs include an AUXADC which can be used to
+monitor a range of system operating parameters, including the voltages
+of the major supplies within the system.  Currently the driver provides
+simple access to these major supplies.
+
+Voltage Monitoring
+------------------
+
+Voltages are sampled by a 12 bit ADC.  For the internal supplies the ADC
+is referenced to the system VRTC.