Here are 2 patches against the 'i2c/for-current' branch of Wolfram's 'linux.git' repo.
The affected drivers call platform_get_irq() but override its result in case of error
which prevents the deferred probing from working.
I've dropped the patch fixing the i2c-pca-platform driver as I considered a fallback
to polling better than (not guaranteed to work) deferred probing...
[1/2] i2c: iop3xx: fix deferred probing
[2/2] i2c: synquacer: fix deferred probing