i2c: mux: pca954x: verify the device id of the pca984x chips

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Make sure to not disallow the chips on adapters that are not capable
of reading the device id, but also make sure to check the device id
before writing to the chip.

Tested-by: Adrian Fiergolski <adrian.fiergolski@cern.ch>
Signed-off-by: Peter Rosin <peda@axentia.se>

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Peter Rosin 2018-01-22 08:40:02 +01:00

parent dde67eb1be

commit 2d74187d5b

1 changed files with 49 additions and 6 deletions

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drivers/i2c/muxes/i2c-mux-pca954x.c

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