[PATCH 2/3] ARM: at91: add pinctrl nodes to i2c-gpio on RM92000 DT
Joachim Eastwood
manabian at gmail.com
Thu Feb 7 20:25:55 EST 2013
GPIO pins used by i2c-gpio must be set to multi drive
(open drain) to work properly.
Signed-off-by: Joachim Eastwood <manabian at gmail.com>
---
arch/arm/boot/dts/at91rm9200.dtsi | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/arm/boot/dts/at91rm9200.dtsi b/arch/arm/boot/dts/at91rm9200.dtsi
index a7031c6..5d3ed5a 100644
--- a/arch/arm/boot/dts/at91rm9200.dtsi
+++ b/arch/arm/boot/dts/at91rm9200.dtsi
@@ -383,6 +383,12 @@
<0 25 0x1 0x2 /* PA25 periph A with multi drive */
0 26 0x1 0x2>; /* PA26 periph A with multi drive */
};
+
+ pinctrl_twi_gpio: twi_gpio-0 {
+ atmel,pins =
+ <0 25 0x0 0x2 /* PA25 GPIO with multi drive */
+ 0 26 0x0 0x2>; /* PA26 GPIO with multi drive */
+ };
};
pioA: gpio at fffff400 {
@@ -520,6 +526,8 @@
i2c-gpio,sda-open-drain;
i2c-gpio,scl-open-drain;
i2c-gpio,delay-us = <2>; /* ~100 kHz */
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_twi_gpio>;
#address-cells = <1>;
#size-cells = <0>;
status = "disabled";
--
1.8.0
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