Fix a compile warning
  sound/soc/qcom/lpass-cpu.c: In function ‘lpass_cpu_daiops_trigger’:
  sound/soc/qcom/lpass-cpu.c:224:2: warning: ‘ret’ may be used uninitialized in this function [-Wmaybe-uninitialized]
    return ret;
      ^
Although switch () lists the most of existing cases, it's still better
to cover the rest as an error properly.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Acked-by: NKenneth Westfield <kwestfie@codeaurora.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

As the representation of the DSP in the device
tree has changed from a required subnode to an
optional phandle, modify the test for DSP
existence in the LPASS CPU DAI driver,
accordingly.
Signed-off-by: NKenneth Westfield <kwestfie@codeaurora.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

Add the CPU DAI driver for the Qualcomm
Technologies low-power audio subsystem (LPASS).
Signed-off-by: NKenneth Westfield <kwestfie@codeaurora.org>
Acked-by: NBanajit Goswami <bgoswami@codeaurora.org>
Signed-off-by: NMark Brown <broonie@kernel.org>