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charset="utf-8" Message-Id: <20261102-a9_i3c-v2-2-0c474bfccffa@amlogic.com> References: <20261102-a9_i3c-v2-0-0c474bfccffa@amlogic.com> In-Reply-To: <20261102-a9_i3c-v2-0-0c474bfccffa@amlogic.com> To: Alexandre Belloni , Frank Li , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , Miquel Raynal , Kees Cook , "Gustavo A. R. Silva" Cc: linux-i3c@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, imx@lists.linux.dev, linux-hardening@vger.kernel.org, xianwei.zhao@amlogic.com, Kelvin.Zhang@amlogic.com, Junyi Zhao X-Mailer: b4 0.16.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1793617545; l=2417; i=junyi.zhao@amlogic.com; s=20260924; h=from:subject:message-id; bh=VT+yxtCcLwOnlSZwmUk7jkYSPZwtcYrMQt3WmbKM8GU=; b=Zyyzgp93TKMyE6jcJva/Zq1NmI1BVjP38JPANbk3tdzRgiWllHITIyK7Vpovl9498mKkoLFEo 6eEov0fXsgEDx8+q1wg0bmzZ1fVltozCJ9/WjtaU8Fp5N6bxJhAEyFW X-Developer-Key: i=junyi.zhao@amlogic.com; a=ed25519; pk=hiL5PjGIksGFiWvEx9J3MhQqU/ro6vNbj72NIw4bbvA= X-Endpoint-Received: by B4 Relay for junyi.zhao@amlogic.com/20260924 with auth_id=1054 X-Original-From: Junyi Zhao Reply-To: junyi.zhao@amlogic.com Content-Transfer-Encoding: 7bit From: Junyi Zhao Amlogic A9 SoCs integrate the Silvaco I3C IP with two controller instances: - amlogic,a9-i3c for the EE domain, which takes two clocks, "pclk" and "fast_clk" like the NXP variants; - amlogic,a9-ao-i3c for the Always-On (AO) domain, which exposes only "pclk": its bus clock is generated by an internal divider located in the controller's own register space. Allow both compatibles with the "silvaco,i3c-master-v1" fallback and enforce the per-variant clock counts. Signed-off-by: Junyi Zhao --- .../bindings/i3c/silvaco,i3c-master.yaml | 24 ++++++++++++++++++++-- 1 file changed, 22 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/i3c/silvaco,i3c-master.yaml b/Documentation/devicetree/bindings/i3c/silvaco,i3c-master.yaml index 853092f75..de1fdec65 100644 --- a/Documentation/devicetree/bindings/i3c/silvaco,i3c-master.yaml +++ b/Documentation/devicetree/bindings/i3c/silvaco,i3c-master.yaml @@ -19,6 +19,8 @@ properties: - enum: - nxp,imx94-i3c - nxp,imx95-i3c + - amlogic,a9-i3c + - amlogic,a9-ao-i3c - const: silvaco,i3c-master-v1 reg: @@ -28,14 +30,14 @@ properties: maxItems: 1 clocks: - minItems: 2 + minItems: 1 items: - description: system clock - description: bus clock - description: other (slower) events clock clock-names: - minItems: 2 + minItems: 1 items: - const: pclk - const: fast_clk @@ -72,12 +74,30 @@ allOf: enum: - nxp,imx94-i3c - nxp,imx95-i3c + - amlogic,a9-i3c then: properties: clocks: + minItems: 2 maxItems: 2 clock-names: + minItems: 2 maxItems: 2 + - if: + properties: + compatible: + contains: + const: amlogic,a9-ao-i3c + then: + properties: + clocks: + maxItems: 1 + description: + The "ao" variant is the controller instance in the Always-On (AO) + domain, which has no separate bus clock and derives the + bus clock from an internal divider. + clock-names: + maxItems: 1 unevaluatedProperties: false -- 2.42.0