hwmon: (it87) Add support for IT8781F

IT8781F is mostly compatible to IT8782F. Major difference is that it only
supports four instead of six UART channels, and therefore does not share
the uart6 pins.

Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

1 files changed, 13 insertions, 9 deletions

diff --git a/Documentation/hwmon/it87 b/Documentation/hwmon/it87
index fe80e9adebfa..8e192fff10f4 100644
--- a/Documentation/hwmon/it87
+++ b/Documentation/hwmon/it87
@@ -42,6 +42,10 @@ Supported chips:
     Prefix: 'it8772'
     Addresses scanned: from Super I/O config space (8 I/O ports)
     Datasheet: Not publicly available
+  * IT8781F
+    Prefix: 'it8781'
+    Addresses scanned: from Super I/O config space (8 I/O ports)
+    Datasheet: Not publicly available
   * IT8782F
     Prefix: 'it8782'
     Addresses scanned: from Super I/O config space (8 I/O ports)
@@ -96,7 +100,7 @@ Description
 
 This driver implements support for the IT8603E, IT8623E, IT8705F, IT8712F,
 IT8716F, IT8718F, IT8720F, IT8721F, IT8726F, IT8728F, IT8758E, IT8771E,
-IT8772E, IT8782F, IT8783E/F, and SiS950 chips.
+IT8772E, IT8781F, IT8782F, IT8783E/F, and SiS950 chips.
 
 These chips are 'Super I/O chips', supporting floppy disks, infrared ports,
 joysticks and other miscellaneous stuff. For hardware monitoring, they
@@ -120,11 +124,11 @@ The IT8716F, IT8718F, IT8720F, IT8721F/IT8758E and later IT8712F revisions
 have support for 2 additional fans. The additional fans are supported by the
 driver.
 
-The IT8716F, IT8718F, IT8720F, IT8721F/IT8758E, IT8782F, IT8783E/F, and late
-IT8712F and IT8705F also have optional 16-bit tachometer counters for fans 1 to
-3. This is better (no more fan clock divider mess) but not compatible with the
-older chips and revisions. The 16-bit tachometer mode is enabled by the driver
-when one of the above chips is detected.
+The IT8716F, IT8718F, IT8720F, IT8721F/IT8758E, IT8781F, IT8782F, IT8783E/F,
+and late IT8712F and IT8705F also have optional 16-bit tachometer counters
+for fans 1 to 3. This is better (no more fan clock divider mess) but not
+compatible with the older chips and revisions. The 16-bit tachometer mode
+is enabled by the driver when one of the above chips is detected.
 
 The IT8726F is just bit enhanced IT8716F with additional hardware
 for AMD power sequencing. Therefore the chip will appear as IT8716F
@@ -156,10 +160,10 @@ inputs can measure voltages between 0 and 4.08 volts, with a resolution of
 0.016 volt (except IT8603E, IT8721F/IT8758E and IT8728F: 0.012 volt.) The
 battery voltage in8 does not have limit registers.
 
-On the IT8603E, IT8721F/IT8758E, IT8782F, and IT8783E/F, some voltage inputs
-are internal and scaled inside the chip:
+On the IT8603E, IT8721F/IT8758E, IT8781F, IT8782F, and IT8783E/F, some
+voltage inputs are internal and scaled inside the chip:
 * in3 (optional)
-* in7 (optional for IT8782F and IT8783E/F)
+* in7 (optional for IT8781F, IT8782F, and IT8783E/F)
 * in8 (always)
 * in9 (relevant for IT8603E only)
 The driver handles this transparently so user-space doesn't have to care.