Hello Alan,
Am 29.11.2017 um 04:25 schrieb Alan Ott:
The .probe_chip function is supposed to probe an i2c device on the bus to determine whether a device is answering to a particular address. at91_i2c_probe_chip() did not do anything resembling this and always returned 0.
It looks as though at91_i2c_probe_chip() was intended to be a .probe function for the controller, as it was copied-and-pasted to become at91_i2c_probe() in 0bc8f640a4d7ed.
Removing the at91_i2c_probe_chip() function makes the higher layer (i2c_probe_chip()) try a zero-length read transfer to test for the presence of a device instead, which does work.
Signed-off-by: Alan Ott alan@softiron.com
drivers/i2c/at91_i2c.c | 22 ---------------------- 1 file changed, 22 deletions(-)
Applied to u-boot-i2c master
Thanks!
bye, Heiko