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

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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>

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Arseny Solokha 2017-12-07 17:20:00 +07:00 • committed by Wolfram Sang

parent aad550f93f

commit 6d10613919

1 changed files with 6 additions and 6 deletions

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drivers/i2c/busses/i2c-mpc.c

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