On Thu, 9 Sep 2004 08:42:22 +0200, Togg wrote > I have a Gateworks Avila Platform (IXP425 Xscale) with an AD7418 > Voltage/Temperature Sensor (Datasheet: > http://www.analog.com/UploadedFiles/Data_Sheets/5632736AD7416_7_8_g.pdf) > > I didn't found any driver anywhere, so I wonder how difficult it > would be to implement a driver. On my platform the chip is connected > via I2C, base address 0x29. Voltages should be multiplied by 23.1 We don't support this family of chips yet. However, these chips look rather simple and writing a driver for them should be straightforward. > I don't have any experience on writing I2C drivers. Anyone knows if there > are good reference drivers which could be used? Best solution for me > would be if someone would implement this in a free minute :) I think you could start from the adm1025 driver for the general structure. The AD7416/7/8 have some 16-bit registers, you could take a look at the lm75 driver for how this should be handled. A single driver should support the three chips. However, until we actually meet an AD7416 or an AD7417, supporting only the AD7418 is fine. We have a document explaining how one can write a driver to support a new chip: http://www2.lm-sensors.nu/~lm78/cvs/lm_sensors2/doc/developers/new_drivers This is for 2.4. For 2.6 there is a porting guide in the kernel sources: Documentation/i2c/porting-clients Good luck. -- Jean Delvare http://khali.linux-fr.org/
