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charset=UTF-8 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260305_041216_585461_1692681D X-CRM114-Status: GOOD ( 16.75 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 05/03/2026 13:02, Ciprian Marian Costea wrote: > On 2/26/2026 9:31 AM, Krzysztof Kozlowski wrote: >> On Wed, Feb 25, 2026 at 02:38:52PM +0100, Ciprian Costea wrote: >>> From: Ciprian Marian Costea >>> >>> Add compatible string for the interrupt steering controller used in NXP >>> S32N79 SoC. >>> >>> The S32N79 SoC differs from the i.MX version by not implementing the >>> CHANCTRL register, but otherwise maintains the same programming model and >>> register layout. >>> >>> Co-developed-by: Larisa Grigore >>> Signed-off-by: Larisa Grigore >>> Signed-off-by: Ciprian Marian Costea >>> --- >>> .../devicetree/bindings/interrupt-controller/fsl,irqsteer.yaml | 1 + >>> 1 file changed, 1 insertion(+) >>> >>> diff --git a/Documentation/devicetree/bindings/interrupt-controller/fsl,irqsteer.yaml b/Documentation/devicetree/bindings/interrupt-controller/fsl,irqsteer.yaml >>> index 5c768c1e159c..caf3e4a1f26f 100644 >>> --- a/Documentation/devicetree/bindings/interrupt-controller/fsl,irqsteer.yaml >>> +++ b/Documentation/devicetree/bindings/interrupt-controller/fsl,irqsteer.yaml >>> @@ -22,6 +22,7 @@ properties: >>> - fsl,imx94-irqsteer >>> - fsl,imx95-irqsteer >>> - const: fsl,imx-irqsteer >>> + - const: nxp,s32n79-irqsteer >> >> So that should be part of enum with the first entry. >> >> Best regards, >> Krzysztof >> > > Hello Krzysztof, > > Thanks for your review. Regarding this change, I was thinking since > S32N79 irqsteer does not implement the 'CHANCTRL' register, it should > not fallback to 'fsl,imx-irqsteer'. If the driver were to match on the > fallback compatible, it would attempt to write to the non-existent > CHANCTRL register. > > Am I wrong? No clue, I did not say anything about fallbacks. Best regards, Krzysztof