tree 4d096a73b785863fc1f2a0fe49ba55a2e72b4c17
parent 1593d7dd8c7b939e31b9d637307b26ada3e3c514
author Mark Brown <broonie@opensource.wolfsonmicro.com> 1282084824 +0100
committer Mark Brown <broonie@opensource.wolfsonmicro.com> 1282084824 +0100

ASoC: Support non-crystal master clocks for WM8731

Instead of unconditionally enabling the crystal oscillator on the WM8731
only enable it when explicitly selected via set_sysclk(), allowing machine
drivers to specify that they drive a clock into MCLK alone. This avoids
any conflicts between the oscillator and the external MCLK source and saves
power for systems which do not need the oscillator.

This should also deliver a small power saving on systems using the crystal
since the oscillator will only be enabled when the ADC or DAC is active.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>