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[0/2] Add code to manage DSP related clocks

Message ID 20210902123216.787025-1-daniel.baluta@oss.nxp.com
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Series Add code to manage DSP related clocks | expand

Message

Daniel Baluta Sept. 2, 2021, 12:32 p.m. UTC 
From: Daniel Baluta <daniel.baluta@nxp.com>


DSP node on the Linux kernel side must also take care of enabling
DAI/DMA related clocks.

By design we choose to manage DAI/DMA clocks from the kernel side
because of the architecture of some i.MX8 boards.

Clocks are handled by a special M4 core which runs a special
firmware called SCFW (System Controler firmware).

This communicates with A cores running Linux via a special Messaging
Unit and implements a custom API which is already implemented by the
Linux kernel i.MX clocks implementation.

Note that these clocks are optional. We can use the DSP without
them.

First patch was already sent to review on SOF Github:
https://github.com/thesofproject/linux/pull/3131

Daniel Baluta (2):
  ASoC: SOF: imx: Add code to manage DSP related clocks
  dt-bindings: dsp: fsl: Add DSP optional clocks documentation

 .../devicetree/bindings/dsp/fsl,dsp.yaml      | 33 ++++++++
 sound/soc/sof/imx/imx-common.c                | 77 +++++++++++++++++++
 sound/soc/sof/imx/imx-common.h                | 16 ++++
 sound/soc/sof/imx/imx8.c                      | 32 ++++++++
 sound/soc/sof/imx/imx8m.c                     | 33 ++++++++
 5 files changed, 191 insertions(+)

-- 
2.27.0