1*4882a593SmuzhiyunKernel driver MCP3021 2*4882a593Smuzhiyun===================== 3*4882a593Smuzhiyun 4*4882a593SmuzhiyunSupported chips: 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun * Microchip Technology MCP3021 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun Prefix: 'mcp3021' 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/21805a.pdf 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun * Microchip Technology MCP3221 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun Prefix: 'mcp3221' 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/21732c.pdf 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun 20*4882a593SmuzhiyunAuthors: 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun - Mingkai Hu 23*4882a593Smuzhiyun - Sven Schuchmann <schuchmann@schleissheimer.de> 24*4882a593Smuzhiyun 25*4882a593SmuzhiyunDescription 26*4882a593Smuzhiyun----------- 27*4882a593Smuzhiyun 28*4882a593SmuzhiyunThis driver implements support for the Microchip Technology MCP3021 and 29*4882a593SmuzhiyunMCP3221 chip. 30*4882a593Smuzhiyun 31*4882a593SmuzhiyunThe Microchip Technology Inc. MCP3021 is a successive approximation A/D 32*4882a593Smuzhiyunconverter (ADC) with 10-bit resolution. The MCP3221 has 12-bit resolution. 33*4882a593Smuzhiyun 34*4882a593SmuzhiyunThese devices provide one single-ended input with very low power consumption. 35*4882a593SmuzhiyunCommunication to the MCP3021/MCP3221 is performed using a 2-wire I2C 36*4882a593Smuzhiyuncompatible interface. Standard (100 kHz) and Fast (400 kHz) I2C modes are 37*4882a593Smuzhiyunavailable. The default I2C device address is 0x4d (contact the Microchip 38*4882a593Smuzhiyunfactory for additional address options). 39