5th
September
2007
Fonera i2c - driver update on Kamikaze 7.07
posted in Embedded |
Update from OpenWrt Kamikaze 7.06 to 7.07 give a lot of good things. One of them is linux 2.6.21.5. The driver for the i2c bus adapter using GPIO need update. Here is.
Main change is the swith from i2c_bit_del_bus to i2c_del_adapter. Drivers seem unstable at boot time :
i2c-algo-bit.o: (0) scl=0, sda=0 i2c-algo-bit.o: GPIO adapter seems to be busy.
But after two minutes, everything work nice again :
i2c-algo-bit.o: (0) scl=128, sda=16 i2c-algo-bit.o: (1) scl=128, sda=0 i2c-algo-bit.o: (2) scl=128, sda=16 i2c-algo-bit.o: (3) scl=0, sda=16 i2c-algo-bit.o: (4) scl=128, sda=16 i2c-algo-bit.o: GPIO adapter passed test. : hw routines registered. I2C adapter driver [GPIO adapter] forgot to specify physical device i2c_adapter i2c-0: adapter [GPIO adapter] registered i2c-dev: adapter [GPIO adapter] registered as minor 0 gpio_i2c: module loaded gpio_i2c: inverted outputs
System load problem perhaps... I need to work on it. Looking on the software side by playing with bigger udelay (allready very big, 600) and on the hardware side too. Capacitors and resistors on the GPIOs can form a RC network that slow down I/O.
Drivers sources are here : http://www.lefinnois.net/fonerai2c/i2c-gpio-0.0.6.tar.gz
Kamikaze 7.07 packages here : http://www.lefinnois.net/fonerai2c/7.07/atheros-2.6/packages/