tree 29f55f284566e86ef0d20c41465d686877b666ac
parent 8e738cef46bda204774004678a53beb14a79625b
author Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz> 1417463358 +1300
committer Heiko Schocher <hs@denx.de> 1418020026 +0100

i2c: Fix deselection of muxes

Due to an uninitialised variable, when muxes were deselected, any value
could be written to the mux control register. On the PCA9548, this could
result in multiple channels being selected, thus enabling multiple
pull-up resistors, and much bus capacitance.

The fix is simply to initialise the written value to zero.

Signed-off-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>