ARM: dts: at91: sama5d2_xplained: classd: pull-down the R1 and R3 lines (07e324d4) · Commits · 戴 / test

The R1 and R3 lines drive NMOS transistors that are OFF with a low level. On the SAMA5D2 Xplained board, if the pins corresponding to R1 and R3 have pull-ups enabled, there is an extra 2 x 30uA power consumption. Use pull-downs for these 2 lines to remove the unnecessary power consumption. Fixes: ("ARM: dts: at91: sama5d2_xplained: add pin muxing and enable classd") Signed-off-by:

Codrin Ciubotariu <codrin.ciubotariu@microchip.com> Signed-off-by:

Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20200615095525.43414-1-codrin.ciubotariu@microchip.com

arch/arm/boot/dts/at91-sama5d2_xplained.dts

+9 −5

Original line number	Diff line number	Diff line
		@@ -490,14 +490,18 @@
		bias-pull-up;
		};

		pinctrl_classd_default: classd_default {
		pinctrl_classd_default_pfets: classd_default_pfets {
		pinmux = <PIN_PB1__CLASSD_R0>,
		<PIN_PB2__CLASSD_R1>,
		<PIN_PB3__CLASSD_R2>,
		<PIN_PB4__CLASSD_R3>;
		<PIN_PB3__CLASSD_R2>;
		bias-pull-up;
		};

		pinctrl_classd_default_nfets: classd_default_nfets {
		pinmux = <PIN_PB2__CLASSD_R1>,
		<PIN_PB4__CLASSD_R3>;
		bias-pull-down;
		};

		pinctrl_flx0_default: flx0_default {
		pinmux = <PIN_PB28__FLEXCOM0_IO0>,
		<PIN_PB29__FLEXCOM0_IO1>;
		@@ -696,7 +700,7 @@

		classd: classd@fc048000 {
		pinctrl-names = "default";
		pinctrl-0 = <&pinctrl_classd_default>;
		pinctrl-0 = <&pinctrl_classd_default_pfets &pinctrl_classd_default_nfets>;
		atmel,pwm-type = "diff";
		atmel,non-overlap-time = <10>;
		status = "okay";

Admin message