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([2804:1b3:a801:42fc:16d8:d66b:d6c1:caeb]) by smtp.gmail.com with ESMTPSA id 71dfb90a1353d-5ea9b55cc65sm2463872e0c.17.2026.10.16.13.48.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Oct 2026 13:48:35 -0700 (PDT) From: Fabio Estevam To: Frank.Li@nxp.com Cc: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, Fabio Estevam Subject: [PATCH v2] ARM: dts: imx27-eukrea: Remove invalid spi-cpol Date: Fri, 16 Oct 2026 17:48:17 -0300 Message-ID: <20261016204817.463567-1-festevam@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The ADS7846 timing diagrams show DCLK low when inactive, and its pin descriptions specify that DIN is latched on the rising edge of DCLK while DOUT is shifted on the falling edge. This corresponds to SPI mode 0, with CPOL=0 and CPHA=0. The spi-cpol property without spi-cpha instead selects SPI mode 2, which uses the opposite clock edges and does not match the ADS7846 serial interface. Remove the invalid property. This also matches the driver behavior: ads7846_probe() clears SPI_MODE_X_MASK and selects SPI_MODE_0 before calling spi_setup(). This fixes the following dtbs_check warning: imx27-eukrea-mbimxsd27-baseboard.dtb: ads7846@0 (ti,ads7846): Unevaluated properties are not allowed (spi-cpol was unexpected) Signed-off-by: Fabio Estevam --- Changes since v1: - Remove spi-cpol from the dts instead of adding it to the binding. (Sashiko) arch/arm/boot/dts/nxp/imx/imx27-eukrea-mbimxsd27-baseboard.dts | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/arm/boot/dts/nxp/imx/imx27-eukrea-mbimxsd27-baseboard.dts b/arch/arm/boot/dts/nxp/imx/imx27-eukrea-mbimxsd27-baseboard.dts index 26833ed3339e..cf5603ec6826 100644 --- a/arch/arm/boot/dts/nxp/imx/imx27-eukrea-mbimxsd27-baseboard.dts +++ b/arch/arm/boot/dts/nxp/imx/imx27-eukrea-mbimxsd27-baseboard.dts @@ -77,7 +77,6 @@ ads7846@0 { pinctrl-0 = <&pinctrl_touch>; reg = <0>; interrupts-extended = <&gpio4 25 IRQ_TYPE_LEVEL_LOW>; - spi-cpol; spi-max-frequency = <1500000>; ti,keep-vref-on; }; -- 2.43.0