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Sun, 19 Jul 2026 22:37:24 -0700 (PDT) Received: from dtor-ws.sjc.corp.google.com ([2a00:79e0:2ebe:8:345f:e51b:3d0c:4546]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3142a20cfe3sm34224663eec.30.2026.07.19.22.37.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 19 Jul 2026 22:37:23 -0700 (PDT) From: Dmitry Torokhov Date: Sun, 19 Jul 2026 22:37:17 -0700 Subject: [PATCH v2 2/3] powerpc/dts: pdm360ng: Convert ADS7845 touchscreen to DT bindings X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260719-ads7846-pdm360ng-v2-2-1198bd108502@gmail.com> References: <20260719-ads7846-pdm360ng-v2-0-1198bd108502@gmail.com> In-Reply-To: <20260719-ads7846-pdm360ng-v2-0-1198bd108502@gmail.com> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" Cc: devicetree@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.16-dev-b242f The PDM360NG board is equipped with an ADS7845 touchscreen controller. Previously, pdm360ng.dts used "ti,ads7846" as a placeholder and relied on platform data in pdm360ng.c to override the model to 7845. Update the ts@0 touchscreen node in pdm360ng.dts to use the correct "ti,ads7845" compatible string along with pendown-gpio (using GPIO_ACTIVE_LOW) and interrupt-parent properties referencing gpio_pic. Note that changing the compatible string to "ti,ads7845" causes the legacy platform data notifier in pdm360ng.c to skip injecting platform data, allowing ads7846 to parse DT properties natively. Although pdm360ng_penirq_init() in pdm360ng.c still runs on boot prior to removing pdm360ng.c, its direct GPIO register writes are harmless because the gpio-mpc8xxx driver resets and re-unmasks pin 25 on demand when the ads7846 driver requests its interrupt. Assisted-by: Antigravity:gemini-3.5-flash Signed-off-by: Dmitry Torokhov --- arch/powerpc/boot/dts/pdm360ng.dts | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/boot/dts/pdm360ng.dts b/arch/powerpc/boot/dts/pdm360ng.dts index 67c3b9db75d7..05e93ca294ee 100644 --- a/arch/powerpc/boot/dts/pdm360ng.dts +++ b/arch/powerpc/boot/dts/pdm360ng.dts @@ -9,6 +9,7 @@ * Copyright 2008 Freescale Semiconductor Inc. */ +#include #include "mpc5121.dtsi" / { @@ -176,11 +177,12 @@ psc@11900 { /* ADS7845 touch screen controller */ ts@0 { - compatible = "ti,ads7846"; + compatible = "ti,ads7845"; reg = <0x0>; spi-max-frequency = <3000000>; - /* pen irq is GPIO25 */ - interrupts = <78 0x8>; + interrupt-parent = <&gpio_pic>; + interrupts = <25 0x8>; + pendown-gpio = <&gpio_pic 25 GPIO_ACTIVE_LOW>; }; }; -- 2.55.0.229.g6434b31f56-goog