linux-kernel - [PATCH v2 0/2] Enable audio support for J721S2 EVM

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Message-ID: <20260205130607.2032818-1-m-shah@ti.com>
Date: Thu, 5 Feb 2026 18:36:06 +0530
From: Moteen Shah <m-shah@...com>
To: <krzk+dt@...nel.org>, <robh@...nel.org>, <conor+dt@...nel.org>,
	<nm@...com>, <vigneshr@...com>, <kristo@...nel.org>
CC: <devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <u-kumar1@...com>, <gehariprasath@...com>,
	<y-abhilashchandra@...com>, <m-shah@...com>
Subject: [PATCH v2 0/2] Enable audio support for J721S2 EVM

This patch series, adds support for analog audio on J721S2 EVM using
device tree overlays.

Earlier version of the patchset sent upstream[0] was rejected as
its dependency[1], which resolves the DTBS check errors introduced
by [0] also got rejected on the grounds of ABI breakage.

Another solution to fix the DTBS check errors introduced by [0] is
to modify the ti,j721e-system-controller.yaml binding to allow
audio-refclk as clock-controller child. This is done in the first
patch of this series.

Changes since v1:
Link to v1: https://lore.kernel.org/all/20260112104536.83309-1-m-shah@ti.com/

- Convert the changes to an overlay
- Enumerate the I2C mux used
- Remove CANUART_MUX_SEL1 gpio hog
- Fix typos
- Add gpio-line-names
- Fix commit message to showcase the right idle-state for muxes
- Carry review from Rob and Hari

Test log: https://gist.github.com/Jamm02/8d3f079cfe866e50e2f447165c0c7939

[0]: https://lore.kernel.org/linux-arm-kernel/20250604104656.38752-1-j-choudhary@ti.com/
[1]: https://lore.kernel.org/all/20250603095609.33569-4-j-choudhary@ti.com/

Jayesh Choudhary (1):
  arm64: dts: ti: Add audio overlay for k3-j721s2-evm

Moteen Shah (1):
  ti,j721e-system-controller.yaml: Allow audio-refclk as
    clock-controller child

 .../soc/ti/ti,j721e-system-controller.yaml    |   6 +-
 arch/arm64/boot/dts/ti/Makefile               |   4 +
 .../boot/dts/ti/k3-j721s2-evm-audio.dtso      | 161 ++++++++++++++++++
 3 files changed, 169 insertions(+), 2 deletions(-)
 create mode 100644 arch/arm64/boot/dts/ti/k3-j721s2-evm-audio.dtso

-- 
2.34.1