From 5510e62a66bad22b104d5d854445523d7f5754f7 Mon Sep 17 00:00:00 2001 From: Xie Xiaobo Date: Fri, 23 Mar 2012 10:02:20 +0100 Subject: hwmon: Add MCP3021 ADC driver Add I2C driver for MCP3021 that is an ADC chip from Microchip. The MCP3021 is a successive approximation A/D converter (ADC) with 10-bit resolution. The driver export the value of Vin to sysfs, the voltage unit is mV. Through the sysfs interface, lm-sensors tool can also display Vin voltage. Signed-off-by: Mingkai Hu Signed-off-by: Xie Xiaobo Signed-off-by: Jean Delvare --- Documentation/hwmon/mcp3021 | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 Documentation/hwmon/mcp3021 (limited to 'Documentation/hwmon/mcp3021') diff --git a/Documentation/hwmon/mcp3021 b/Documentation/hwmon/mcp3021 new file mode 100644 index 000000000000..325fd87e81b2 --- /dev/null +++ b/Documentation/hwmon/mcp3021 @@ -0,0 +1,22 @@ +Kernel driver MCP3021 +====================== + +Supported chips: + * Microchip Technology MCP3021 + Prefix: 'mcp3021' + Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/21805a.pdf + +Author: Mingkai Hu + +Description +----------- + +This driver implements support for the Microchip Technology MCP3021 chip. + +The Microchip Technology Inc. MCP3021 is a successive approximation A/D +converter (ADC) with 10-bit resolution. +This device provides one single-ended input with very low power consumption. +Communication to the MCP3021 is performed using a 2-wire I2C compatible +interface. Standard (100 kHz) and Fast (400 kHz) I2C modes are available. +The default I2C device address is 0x4d (contact the Microchip factory for +additional address options). -- cgit v1.2.3