tree e72c8ea76087ae8cb8ed739865d07e167ab05b5d
parent aad550f93fbc28d562a624700f9c12c9b9055a5e
author Arseny Solokha <asolokha@kb.kras.ru> 1512642000 +0700
committer Wolfram Sang <wsa@the-dreams.de> 1516039986 +0100

i2c: mpc: get MPC8xxx I2C clock prescaler before using it in calculations

Obtaining the actual I2C clock prescaler value in mpc_i2c_setup_8xxx() only
happens when the clock parameter is set to something other than
MPC_I2C_CLOCK_LEGACY. When the clock parameter is exactly
MPC_I2C_CLOCK_LEGACY, the prescaler parameter is used in arithmetic
division as provided by the caller, resulting in a division by zero
for the majority of processors supported by the module.

Avoid division by zero by obtaining the actual I2C clock prescaler
in mpc_i2c_setup_8xxx() unconditionally regardless of the passed clock
value.

Signed-off-by: Arseny Solokha <asolokha@kb.kras.ru>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>