mfd: mc13xxx: Move SPI erratum workaround into SPI I/O function
Move the workaround for double sending AUDIO_CODEC and AUDIO_DAC writes
into the SPI core, aiding refactoring to eliminate the ASoC custom I/O
functions and avoiding the extra writes for I2C.
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/mc13xxx-spi.c b/drivers/mfd/mc13xxx-spi.c
index 77189da..5f14ef6 100644
--- a/drivers/mfd/mc13xxx-spi.c
+++ b/drivers/mfd/mc13xxx-spi.c
@@ -94,10 +94,15 @@
{
struct device *dev = context;
struct spi_device *spi = to_spi_device(dev);
+ const char *reg = data;
if (count != 4)
return -ENOTSUPP;
+ /* include errata fix for spi audio problems */
+ if (*reg == MC13783_AUDIO_CODEC || *reg == MC13783_AUDIO_DAC)
+ spi_write(spi, data, count);
+
return spi_write(spi, data, count);
}