Build error with [PATCH v10 3/4] drivers/i2c/busses/i2c-at91.c

Hi Stefano,

Stefano Salati wrote on 2012-07-11:

Thank you for publishing your patches! I'm using a at91sam9x5 board and I've
been trying to patch the TWI so to be able to use the physical I2C module.
When compiling, I get this error:

|   CC      drivers/i2c/busses/i2c-at91.o |
drivers/i2c/busses/i2c-at91.c: In function 'at91_twi_probe': |
drivers/i2c/busses/i2c-at91.c:350:2: error: implicit declaration of
function 'clk_prepare' | drivers/i2c/busses/i2c-at91.c:394:2: error:
implicit declaration of function 'clk_unprepare'

I tried to grep these these 2 functions in the whole /linux-2.6.39 but I had
no luck, I cannot find any declaration (even in files belonging to the board
you've designed the patch for).
Where I'm missing something?

the driver is designed for kernel 3.2 or newer, nevertheless it should work
on older kernels with slight modifications. You can simply delete the
clk_prepare()/unprepare() stuff for your kernel version.

Please report the SoC and I2C clients you tested the driver with, preferably
with a Tested-by tag, so I can include it in newer versions of the driver
to improve the chance of mainlining the driver.

Niko