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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>
This commit is contained in:
Sylvain Rochet 2015-01-16 10:50:39 +01:00 committed by Nicolas Ferre
parent 4dd32e6d24
commit 73734551f8
1 changed files with 9 additions and 0 deletions
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9
arch/arm/boot/dts/at91sam9x5ek.dtsi
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@ -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 {