diff options
| author | Xie Xiaobo <X.Xie@freescale.com> | 2012-03-23 10:02:20 +0100 |
|---|---|---|
| committer | Jean Delvare <khali@endymion.delvare> | 2012-03-23 10:02:20 +0100 |
| commit | 5510e62a66bad22b104d5d854445523d7f5754f7 (patch) | |
| tree | a580bd3fff0831628bc0d525d975853bbf25a86d /Documentation/hwmon | |
| parent | 0c2732152a5813a870d0b96f0844f4dfe1436519 (diff) | |
| download | lwn-5510e62a66bad22b104d5d854445523d7f5754f7.tar.gz lwn-5510e62a66bad22b104d5d854445523d7f5754f7.zip | |
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 <Mingkai.hu@freescale.com>
Signed-off-by: Xie Xiaobo <X.Xie@freescale.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/mcp3021 | 22 |
1 files changed, 22 insertions, 0 deletions
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). |