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Subject[PATCH 1/3] ARM: dts: at91: sama5d2 Xplained: set pin muxing for usb gadget and usb host
Date
From: Cyrille Pitchen <cyrille.pitchen@atmel.com>

For USB gadget on port A (device mode):
- pin PA31 is configured as an input GPIO which triggers an interrupt when
vbus is detected on USB port A.
- pin PB9 is configured as an output GPIO and set to low level so the
board doesn't supply vbus to USB port A.

For USB host:
- pin PB10 is configured as an output GPIO and is active at high level.
The ohci driver will activate this pin so the board supplies vbus to USB
port B.
- pin PB9 should be configured as an output GPIO and active at high level
to use to USB port A in host mode (conflicts with USB gadget).

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
---
arch/arm/boot/dts/at91-sama5d2_xplained.dts | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)

diff --git a/arch/arm/boot/dts/at91-sama5d2_xplained.dts b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
index 75341eec2dfd..382ccfb4a2b6 100644
--- a/arch/arm/boot/dts/at91-sama5d2_xplained.dts
+++ b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
@@ -46,6 +46,7 @@
#include "sama5d2.dtsi"
#include "sama5d2-pinfunc.h"
#include <dt-bindings/mfd/atmel-flexcom.h>
+#include <dt-bindings/gpio/gpio.h>

/ {
model = "Atmel SAMA5D2 Xplained";
@@ -71,11 +72,20 @@

ahb {
usb0: gadget@00300000 {
+ atmel,vbus-gpio = <&pioA 31 GPIO_ACTIVE_HIGH>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_usba_vbus>;
status = "okay";
};

usb1: ohci@00400000 {
num-ports = <3>;
+ atmel,vbus-gpio = <0 /* &pioA 41 GPIO_ACTIVE_HIGH */
+ &pioA 42 GPIO_ACTIVE_HIGH
+ 0
+ >;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_usb_default>;
status = "okay";
};

@@ -376,6 +386,17 @@
<PIN_PB12__UTXD3>;
bias-disable;
};
+
+ pinctrl_usb_default: usb_default {
+ pinmux = <PIN_PB10__GPIO>;
+ bias-disable;
+ };
+
+ pinctrl_usba_vbus: usba_vbus {
+ pinmux = <PIN_PA31__GPIO>;
+ bias-disable;
+ };
+
};
};
};
--
2.1.3
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