[v2,0/2] clk: keystone: syscon-clk: Enable audio reference clock

Message

Jai Luthra May 22, 2023, 6:31 a.m. UTC

TI's AM62 SoC can optionally provide two audio reference clocks
(AUDIO_REFCLKx) to external peripherals. By default the reference clock
is looped-back inside the SoC to a mux that goes to McASP AHCLK, but can
optionally be enabled as an output to peripherals outside the SoC by
setting a bit through CTRL_MMR registers.

This patch series extends the existing syscon-clk driver to support
the audio reference clock, and also adds new device tree bindings
documentation.

Please apply this on-top-of Andrew's series [1] removing the unnecessary
dependency on syscon compatible.

Signed-off-by: Jai Luthra <[e-mail]>
---
Changes in v2:
- Removed "syscon" compatible and rebased on top of [1]
- Moved reg above other properties in bindings yaml
- Link to v1: https://lore.kernel.org/r/[e-mail]

[1]: https://lore.kernel.org/linux-clk/[e-mail]/#t

Range-diff from v1:
1:  8107cb140f7d ! 1:  a690c2044971 dt-bindings: clock: Add binding documentation for TI Audio REFCLK
    @@ Documentation/devicetree/bindings/clock/ti,am62-audio-refclk.yaml (new)
     +  compatible:
     +    items:
     +      - const: ti,am62-audio-refclk
    -+      - const: syscon
    -+
    -+  "#clock-cells":
    -+    const: 0
     +
     +  reg:
     +    maxItems: 1
     +
    ++  "#clock-cells":
    ++    const: 0
    ++
     +  clocks:
     +    maxItems: 1
     +
     +required:
     +  - compatible
    -+  - "#clock-cells"
     +  - reg
    ++  - "#clock-cells"
     +  - clocks
     +
     +additionalProperties: false
    @@ Documentation/devicetree/bindings/clock/ti,am62-audio-refclk.yaml (new)
     +examples:
     +  - |
     +    audio_refclk0: clock@82e0 {
    -+        compatible = "ti,am62-audio-refclk", "syscon";
    ++        compatible = "ti,am62-audio-refclk";
     +        reg = <0x82e0 0x4>;
     +        clocks = <&k3_clks 157 0>;
     +        assigned-clocks = <&k3_clks 157 0>;
2:  5a555757fe42 = 2:  854166d4305f clk: keystone: syscon-clk: Add support for audio refclk

---
Jai Luthra (2):
      dt-bindings: clock: Add binding documentation for TI Audio REFCLK
      clk: keystone: syscon-clk: Add support for audio refclk

 .../bindings/clock/ti,am62-audio-refclk.yaml       | 43 ++++++++++++++++++++++
 drivers/clk/keystone/syscon-clk.c                  | 43 +++++++++++++++++++---
 2 files changed, 81 insertions(+), 5 deletions(-)
---
base-commit: 62f117ff3cbc8ea2bf9be36f019eba60369b6a81
change-id: 20230515-refclk-5b544d314c23

Best regards,