drivers: i2s: stm32: Add I2S master clock output

Some external audio devices require a master clock to be provided by
the I2S peripheral to work correctly. To allow for the operation of
these devices the master clock output should always be enabled when in
master mode.

Specific applications requiring this signal to be output can configure
the desitnation pin via the pinmux driver.

Signed-off-by: Abe Kohandel <abe@electronshepherds.com>
1 file changed