summaryrefslogtreecommitdiffstats
path: root/Documentation/hwmon/mc13783-adc.rst
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/hwmon/mc13783-adc.rst')
-rw-r--r--Documentation/hwmon/mc13783-adc.rst89
1 files changed, 89 insertions, 0 deletions
diff --git a/Documentation/hwmon/mc13783-adc.rst b/Documentation/hwmon/mc13783-adc.rst
new file mode 100644
index 0000000000..cae70350ba
--- /dev/null
+++ b/Documentation/hwmon/mc13783-adc.rst
@@ -0,0 +1,89 @@
+Kernel driver mc13783-adc
+=========================
+
+Supported chips:
+
+ * Freescale MC13783
+
+ Prefix: 'mc13783'
+
+ Datasheet: https://www.nxp.com/docs/en/data-sheet/MC13783.pdf
+
+ * Freescale MC13892
+
+ Prefix: 'mc13892'
+
+ Datasheet: https://www.nxp.com/docs/en/data-sheet/MC13892.pdf
+
+
+
+Authors:
+
+ - Sascha Hauer <s.hauer@pengutronix.de>
+ - Luotao Fu <l.fu@pengutronix.de>
+
+Description
+-----------
+
+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.
+
+Some channels can be used as General Purpose inputs or in a dedicated mode with
+a chip internal scaling applied .
+
+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
+1 Battery Current (BATT - BATTISNS) -50 - 50 mV x20
+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) -0.25 - 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
+7 General Purpose ADIN7 / UID / Die Temperature 0 - 2.30V / No /
+ 0 - 2.55V / x0.9 / No
+8 General Purpose ADIN8 0 - 2.30V No
+9 General Purpose ADIN9 0 - 2.30V No
+10 General Purpose ADIN10 0 - 2.30V No
+11 General Purpose ADIN11 0 - 2.30V No
+12 General Purpose TSX1 / Touchscreen X-plate 1 0 - 2.30V No
+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
+======= =============================================== =============== =======