ARM: at91: sam9g20 add i2c DT support

For now on use i2c-gpio driver on the same pin as the hardware IP.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>

diff --git a/arch/arm/boot/dts/at91sam9g20.dtsi b/arch/arm/boot/dts/at91sam9g20.dtsi
index 4b0dc99..a885a30 100644 (file)
--- a/arch/arm/boot/dts/at91sam9g20.dtsi
+++ b/arch/arm/boot/dts/at91sam9g20.dtsi
@@ -189,4 +189,17 @@
                        status = "disabled";
                };
        };
+
+       i2c@0 {
+               compatible = "i2c-gpio";
+               gpios = <&pioA 23 0 /* sda */
+                        &pioA 24 0 /* scl */
+                       >;
+               i2c-gpio,sda-open-drain;
+               i2c-gpio,scl-open-drain;
+               i2c-gpio,delay-us = <2>;        /* ~100 kHz */
+               #address-cells = <1>;
+               #size-cells = <0>;
+               status = "disabled";
+       };
 };