linux-kernel - [PATCH v3 0/3] soundwire: qcom: add pm runtime support

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Date:   Mon, 28 Feb 2022 17:25:25 +0000
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     robh+dt@...nel.org, vkoul@...nel.org,
        yung-chuan.liao@...ux.intel.com
Cc:     pierre-louis.bossart@...ux.intel.com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
        quic_srivasam@...cinc.com,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH v3 0/3] soundwire: qcom: add pm runtime support

This patchset adds pm runtime support to Qualcomm SounWire Controller using
SoundWire Clock Stop and Wake up using Headset events on supported instances and
instances like WSA which do not support clock stop a soft reset of controller
along with full rest of slaves is done to resume from a low power state.

Tested it on SM8250 MTP and Dragon Board DB845c

Changes since v2:
 - update log as suggested by Pierre
 - removing handling clk stop for cases where the controller is soft reset.
 - add more error checks when calling  sdw_bus_prep_clk_stop
 - update dt-bindings with wakeup-source and interrupt-names properties.

--srini

Srinivas Kandagatla (3):
  soundwire: qcom: add runtime pm support
  dt-bindings: soundwire: qcom: document optional wake irq
  soundwire: qcom: add in-band wake up interrupt support

 .../bindings/soundwire/qcom,sdw.txt           |  14 +-
 drivers/soundwire/qcom.c                      | 206 +++++++++++++++++-
 2 files changed, 218 insertions(+), 2 deletions(-)

-- 
2.21.0