[PATCH 04/04 v2] ARM: shmobile: Genmai I2C-over-GPIO support

[Magnus Damm]

From: Magnus Damm <damm at opensource.se>

Add support for the Genmai I2C bus hooked up to P1_5 and P1_4 using
the i2c-gpio driver. On the bus sits a 24c128 EEPRROM.

Signed-off-by: Magnus Damm <damm at opensource.se>
---

 Changes since V1:
 - Use compatible string "renesas,12c128" and set pagesize, thanks Wolfram!
 - Use "flash at 50", thanks Sergei!

 arch/arm/boot/dts/r7s72100-genmai-reference.dts |   18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

--- 0011/arch/arm/boot/dts/r7s72100-genmai-reference.dts
+++ work/arch/arm/boot/dts/r7s72100-genmai-reference.dts	2013-12-16 20:08:48.000000000 +0900
@@ -39,6 +39,24 @@
 			gpios = <&port4 11 GPIO_ACTIVE_LOW>;
 		};
 	};
+
+	i2c at 0 {
+		compatible = "i2c-gpio";
+		gpios = <&port1 5 GPIO_ACTIVE_HIGH /* sda */
+			 &port1 4 GPIO_ACTIVE_HIGH /* scl */
+			>;
+		i2c-gpio,sda-open-drain;
+		i2c-gpio,scl-open-drain;
+		i2c-gpio,delay-us = <5>;	/* ~100 kHz */
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		flash at 50 {
+			compatible = "renesas,24c128";
+			reg = <0x50>;
+			pagesize = <64>;
+		};
+	};
 };
 
 &pfc {