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diff --git a/Documentation/hwmon/mc13783-adc.rst b/Documentation/hwmon/mc13783-adc.rst new file mode 100644 index 000000000000..cae70350ba2f --- /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 +======= =============================================== =============== ======= |