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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org > -----Original Message----- > From: Shawn Guo > Sent: Monday, September 12, 2022 3:17 AM > To: Shenwei Wang > Cc: Rob Herring ; Krzysztof Kozlowski > ; Sascha Hauer ; > Pengutronix Kernel Team ; Peng Fan > ; devicetree@vger.kernel.org; linux-arm- > kernel@lists.infradead.org; imx@lists.linux.dev; dl-linux-imx imx@nxp.com> > > > > + > > > > + reg_fec1_sel: regulator-1 { > > > > + compatible = "regulator-fixed"; > > > > + regulator-name = "fec1_supply"; > > > > + regulator-min-microvolt = <3300000>; > > > > + regulator-max-microvolt = <3300000>; > > > > + gpio = <&pca6416_1 11 GPIO_ACTIVE_HIGH>; > > > > > > Missing enable-active-high? > > > > No. Enabling this regulator to select the fec1 interface instead of usdhc2. > Pulling this GPIO pin to low is to use FEC1 interface. > > Then the polarity cell should be GPIO_ACTIVE_LOW rather than > GPIO_ACTIVE_HIGH? > That doesn't matter since any GPIO phandle flags are ignored in the node of "regulator-fixed". The final flag is only determined by the property of "enable-active-high". If there is a "enable-active-high", the GPIO line works as active high. If no such a property, it works as active low by default. Right? Regards, Shenwei > Shawn _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel