i2c: omap: Fix missing device tree flags for omap2

As we claim to support device tree for mach-omap2, we
should have the necessary flags in the driver to make it
usable.

Cc: linux-i2c@vger.kernel.org
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Documentation/devicetree/bindings/i2c/i2c-omap.txt

 I2C for OMAP platforms
 
 Required properties :
-- compatible : Must be "ti,omap3-i2c" or "ti,omap4-i2c"
+- compatible : Must be "ti,omap2420-i2c", "ti,omap2430-i2c", "ti,omap3-i2c"
+  or "ti,omap4-i2c"
 - ti,hwmods : Must be "i2c<n>", n being the instance number (1-based)
 - #address-cells = <1>;
 - #size-cells = <0>;

drivers/i2c/busses/i2c-omap.c

@@ -1037,6 +1037,20 @@ static const struct i2c_algorithm omap_i2c_algo = {
 };
 
 #ifdef CONFIG_OF
+static struct omap_i2c_bus_platform_data omap2420_pdata = {
+	.rev = OMAP_I2C_IP_VERSION_1,
+	.flags = OMAP_I2C_FLAG_NO_FIFO |
+			OMAP_I2C_FLAG_SIMPLE_CLOCK |
+			OMAP_I2C_FLAG_16BIT_DATA_REG |
+			OMAP_I2C_FLAG_BUS_SHIFT_2,
+};
+
+static struct omap_i2c_bus_platform_data omap2430_pdata = {
+	.rev = OMAP_I2C_IP_VERSION_1,
+	.flags = OMAP_I2C_FLAG_BUS_SHIFT_2 |
+			OMAP_I2C_FLAG_FORCE_19200_INT_CLK,
+};
+
 static struct omap_i2c_bus_platform_data omap3_pdata = {
 	.rev = OMAP_I2C_IP_VERSION_1,
 	.flags = OMAP_I2C_FLAG_BUS_SHIFT_2,
@@ -1055,6 +1069,14 @@ static const struct of_device_id omap_i2c_of_match[] = {
 		.compatible = "ti,omap3-i2c",
 		.data = &omap3_pdata,
 	},
+	{
+		.compatible = "ti,omap2430-i2c",
+		.data = &omap2430_pdata,
+	},
+	{
+		.compatible = "ti,omap2420-i2c",
+		.data = &omap2420_pdata,
+	},
 	{ },
 };
 MODULE_DEVICE_TABLE(of, omap_i2c_of_match);