hwmon: (mc13783-adc) Add support for the MC13892 PMIC

Based on a patch by David Jander that mostly did s/mc13783/mc13xxx/ .

Additionally use dev_get_drvdata instead of to_platform_device +
platform_get_drvdata in mc13783_adc_read (spotted by Jean Delvare).

Cc: David Jander <david.jander@protonic.nl>
Signed-off-by: Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

1 files changed, 37 insertions, 13 deletions

diff --git a/Documentation/hwmon/mc13783-adc b/Documentation/hwmon/mc13783-adc
index 044531a86405..d0e7b3fa9e75 100644
--- a/Documentation/hwmon/mc13783-adc
+++ b/Documentation/hwmon/mc13783-adc
@@ -3,8 +3,11 @@ Kernel driver mc13783-adc
 
 Supported chips:
   * Freescale Atlas MC13783
-    Prefix: 'mc13783_adc'
+    Prefix: 'mc13783'
     Datasheet: http://www.freescale.com/files/rf_if/doc/data_sheet/MC13783.pdf?fsrch=1
+  * Freescale Atlas MC13892
+    Prefix: 'mc13892'
+    Datasheet: http://cache.freescale.com/files/analog/doc/data_sheet/MC13892.pdf?fsrch=1&sr=1
 
 Authors:
     Sascha Hauer <s.hauer@pengutronix.de>
@@ -13,20 +16,21 @@ Authors:
 Description
 -----------
 
-The Freescale MC13783 is a Power Management and Audio Circuit. Among
-other things it contains a 10-bit A/D converter. The converter has 16
-channels which can be used in different modes.
-The A/D converter has a resolution of 2.25mV. Channels 0-4 have
-a dedicated meaning with chip internal scaling applied. Channels 5-7
-can be used as general purpose inputs or alternatively in a dedicated
-mode. Channels 12-15 are occupied by the touchscreen if it's active.
+The Freescale MC13783 and MC13892 are Power Management and Audio Circuits.
+Among other things they contain a 10-bit A/D converter. The converter has 16
+(MC13783) resp. 12 (MC13892) channels which can be used in different modes. The
+A/D converter has a resolution of 2.25mV.
 
-Currently the driver only supports channels 2 and 5-15 with no alternative
-modes for channels 5-7.
+Some channels can be used as General Purpose inputs or in a dedicated mode with
+a chip internal scaling applied .
 
-See this table for the meaning of the different channels and their chip
-internal scaling:
+Currently the driver only supports the Application Supply channel (BP / BPSNS),
+the General Purpose inputs and touchscreen.
 
+See the following tables for the meaning of the different channels and their
+chip internal scaling:
+
+MC13783:
 Channel Signal                                          Input Range     Scaling
 -------------------------------------------------------------------------------
 0       Battery Voltage (BATT)                          2.50 - 4.65V    -2.40V
@@ -34,7 +38,7 @@ Channel	Signal						Input Range	Scaling
 2       Application Supply (BP)                         2.50 - 4.65V    -2.40V
 3       Charger Voltage (CHRGRAW)                       0 - 10V /       /5
                                                         0 - 20V         /10
-4       Charger Current (CHRGISNSP-CHRGISNSN)           -0.25V - 0.25V  x4
+4       Charger Current (CHRGISNSP-CHRGISNSN)           -0.25 - 0.25V   x4
 5       General Purpose ADIN5 / Battery Pack Thermistor 0 - 2.30V       No
 6       General Purpose ADIN6 / Backup Voltage (LICELL) 0 - 2.30V /     No /
                                                         1.50 - 3.50V    -1.20V
@@ -48,3 +52,23 @@ Channel	Signal						Input Range	Scaling
 13      General Purpose TSX2 / Touchscreen X-plate 2    0 - 2.30V       No
 14      General Purpose TSY1 / Touchscreen Y-plate 1    0 - 2.30V       No
 15      General Purpose TSY2 / Touchscreen Y-plate 2    0 - 2.30V       No
+
+MC13892:
+Channel Signal                                          Input Range     Scaling
+-------------------------------------------------------------------------------
+0       Battery Voltage (BATT)                          0 - 4.8V        /2
+1       Battery Current (BATT - BATTISNSCC)             -60 - 60 mV     x20
+2       Application Supply (BPSNS)                      0 - 4.8V        /2
+3       Charger Voltage (CHRGRAW)                       0 - 12V /       /5
+                                                        0 - 20V         /10
+4       Charger Current (CHRGISNS-BPSNS) /              -0.3 - 0.3V /   x4 /
+        Touchscreen X-plate 1                           0 - 2.4V        No
+5       General Purpose ADIN5 / Battery Pack Thermistor 0 - 2.4V        No
+6       General Purpose ADIN6 / Backup Voltage (LICELL) 0 - 2.4V /      No
+        Backup Voltage (LICELL)                         0 - 3.6V        x2/3
+7       General Purpose ADIN7 / UID / Die Temperature   0 - 2.4V /      No /
+                                                        0 - 4.8V        /2
+12      General Purpose TSX1 / Touchscreen X-plate 1    0 - 2.4V        No
+13      General Purpose TSX2 / Touchscreen X-plate 2    0 - 2.4V        No
+14      General Purpose TSY1 / Touchscreen Y-plate 1    0 - 2.4V        No
+15      General Purpose TSY2 / Touchscreen Y-plate 2    0 - 2.4V        No