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.
Signed-off-by: Daniel Baluta daniel.baluta@nxp.com --- .../devicetree/bindings/dsp/fsl,dsp.yaml | 33 +++++++++++++++++++ 1 file changed, 33 insertions(+)
diff --git a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml b/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml index 7afc9f2be13a..1453668c0194 100644 --- a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml +++ b/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml @@ -24,16 +24,49 @@ properties: maxItems: 1
clocks: + minItems: 3 items: - description: ipg clock - description: ocram clock - description: core clock + - description: esai0 core clock for accessing registers + - description: esai0 baud clock + - description: esai0 system clock + - description: esai0 spba clock required when ESAI is placed in slave mode + - description: SAI1 bus clock + - description: SAI1 master clock 0 + - description: SAI1 master clock 1 + - description: SAI1 master clock 2 + - description: SAI1 master clock 3 + - description: SAI3 bus clock + - description: SAI3 master clock 0 + - description: SAI3 master clock 1 + - description: SAI3 master clock 2 + - description: SAI3 master clock 3 + - description: SDMA3 root clock used for accessing registers +
clock-names: + minItems: 3 items: - const: ipg - const: ocram - const: core + - const: esai0_core + - const: esai0_extal + - const: esai0_fsys + - const: esai0_spba + - const: sai1_bus + - const: sai1_mclk0 + - const: sai1_mclk1 + - const: sai1_mclk2 + - const: sai1_mclk3 + - const: sai3_bus + - const: sai3_mclk0 + - const: sai3_mclk1 + - const: sai3_mclk2 + - const: sai3_mclk3 + - const: smda3_root
power-domains: description: