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>

diff --git a/arch/arm/boot/dts/at91sam9x5ek.dtsi b/arch/arm/boot/dts/at91sam9x5ek.dtsi
index 3a9f6fa4a36ad749563dec54735c186fa582fa51..bd16bd360272ae212cc0a86c10dde6b697c3c31b 100644 (file)
--- 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 {