diff options
| author | Sylvain Rochet <sylvain.rochet@finsecur.com> | 2015-01-16 10:50:39 +0100 |
|---|---|---|
| committer | Nicolas Ferre <nicolas.ferre@atmel.com> | 2015-01-16 16:07:05 +0100 |
| commit | 73734551f88394528506e8773a308d2fb84db5f0 (patch) | |
| tree | b9eb8d01cf6a2830f787179d9d521006ce54f6a5 /arch | |
| parent | 4dd32e6d24932b0b0327d3a8ce526a56446e9b98 (diff) | |
| download | linux-73734551f88394528506e8773a308d2fb84db5f0.tar.bz2 | |
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/boot/dts/at91sam9x5ek.dtsi | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/at91sam9x5ek.dtsi b/arch/arm/boot/dts/at91sam9x5ek.dtsi index 3a9f6fa4a36a..bd16bd360272 100644 --- a/arch/arm/boot/dts/at91sam9x5ek.dtsi +++ b/arch/arm/boot/dts/at91sam9x5ek.dtsi @@ -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 { |