Commit 73734551 authored Jan 16, 2015 by Sylvain Rochet Committed by Nicolas Ferre Jan 16, 2015

ARM: at91/dt: disable pull-up on vbus-gpio (PB16) to reduce power consumption



There is an external resistor divider on PB16, acting like a pull-down,
the pull-up increase power consumption and prevent the vbus detect pin
to reach Vss voltage, ~1.5V mesured on my board, it might not even work
if the pull-up is stronger than usual.

Signed-off-by: Sylvain Rochet <sylvain.rochet@finsecur.com>
Acked-by: Bo Shen <voice.shen@atmel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

parent 4dd32e6d

arch/arm/boot/dts/at91sam9x5ek.dtsi

+9 −0

Original line number	Diff line number	Diff line
		@@ -53,6 +53,8 @@
		};

		usb2: gadget@f803c000 {
		pinctrl-names = "default";
		pinctrl-0 = <&pinctrl_board_usb2>;
		atmel,vbus-gpio = <&pioB 16 GPIO_ACTIVE_HIGH>;
		status = "okay";
		};
		@@ -80,6 +82,13 @@
		<AT91_PIOD 14 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP_DEGLITCH>; /* PD14 gpio CD pin pull up and deglitch */
		};
		};

		usb2 {
		pinctrl_board_usb2: usb2-board {
		atmel,pins =
		<AT91_PIOB 16 AT91_PERIPH_GPIO AT91_PINCTRL_DEGLITCH>; /* PB16 gpio vbus sense, deglitch */
		};
		};
		};

		spi0: spi@f0000000 {