In our i2s driver, we were previously trying to guess which oversample the
user wanted to use by looking at the rate and trying to max it.

However, the cards, and especially simple-card with its mclk-fs property
will already provide the expected oversample ratio by using the set_sysclk
callback.

We can thus implement it and remove the logic to deal with the runtime
guess.
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

The i2s driver was only implementing playback for now. Implement capture to
make sure that's not a limitation anymore.
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

There is a error message within devm_ioremap_resource
already, so remove the dev_err call to avoid redundant
error message.
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/sunxi/sun4i-i2s.c:624:2-3: Unneeded semicolon

 Remove unneeded semicolon.

Generated by: scripts/coccinelle/misc/semicolon.cocci
Signed-off-by: NFengguang Wu <fengguang.wu@intel.com>
Acked-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

The Allwinner A10 and later come with a hardware block that used for the
PCM and I2S interfaces.

Add a driver for it in ASoC.
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Tested-by: NChen-Yu Tsai <wens@csie.org>
Signed-off-by: NMark Brown <broonie@kernel.org>