[PATCH V3 1/4] ARM: shmobile: koelsch: Add I2C support

[Valentine Barshak <valentine.barshak@cogentembedded.com>]

This adds I2C[1245] busses support to Koelsch board.
I2C[03] do not have any slave devices connected and
are not used because of the following:
* I2C0 pins are multiplexed with LBSC pins;
* I2C3 pins are multiplexed with EtherMAC and VIN0 pins.

Signed-off-by: Valentine Barshak <valentine.barshak@cogentembedded.com>
---
 arch/arm/mach-shmobile/board-koelsch.c | 46 ++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

Changes in V2:
* capitalized ARM in the subject;

Changes in V3:
* rebased on top of renesas-devel-v3.14-rc1-20140204 tag.

diff --git a/arch/arm/mach-shmobile/board-koelsch.c b/arch/arm/mach-shmobile/board-koelsch.c
index 2ab5c75..b9f638e 100644
--- a/arch/arm/mach-shmobile/board-koelsch.c
+++ b/arch/arm/mach-shmobile/board-koelsch.c
@@ -163,6 +163,38 @@ static const struct platform_device_info sata0_info __initconst = {
 	.dma_mask	= DMA_BIT_MASK(32),
 };
 
+/* I2C */
+static const struct resource i2c_resources[] __initconst = {
+	/* I2C0 */
+	DEFINE_RES_MEM(0xE6508000, 0x40),
+	DEFINE_RES_IRQ(gic_spi(287)),
+	/* I2C1 */
+	DEFINE_RES_MEM(0xE6518000, 0x40),
+	DEFINE_RES_IRQ(gic_spi(288)),
+	/* I2C2 */
+	DEFINE_RES_MEM(0xE6530000, 0x40),
+	DEFINE_RES_IRQ(gic_spi(286)),
+	/* I2C3 */
+	DEFINE_RES_MEM(0xE6540000, 0x40),
+	DEFINE_RES_IRQ(gic_spi(290)),
+	/* I2C4 */
+	DEFINE_RES_MEM(0xE6520000, 0x40),
+	DEFINE_RES_IRQ(gic_spi(19)),
+	/* I2C5 */
+	DEFINE_RES_MEM(0xE6528000, 0x40),
+	DEFINE_RES_IRQ(gic_spi(20)),
+};
+
+static void __init koelsch_add_i2c(unsigned idx)
+{
+	unsigned res_idx = idx * 2;
+
+	BUG_ON(res_idx >= ARRAY_SIZE(i2c_resources));
+
+	platform_device_register_simple("i2c-rcar_gen2", idx,
+					i2c_resources + res_idx, 2);
+}
+
 static const struct pinctrl_map koelsch_pinctrl_map[] = {
 	/* DU */
 	PIN_MAP_MUX_GROUP_DEFAULT("rcar-du-r8a7791", "pfc-r8a7791",
@@ -186,6 +218,15 @@ static const struct pinctrl_map koelsch_pinctrl_map[] = {
 	/* SCIF1 (CN20: DEBUG SERIAL1) */
 	PIN_MAP_MUX_GROUP_DEFAULT("sh-sci.7", "pfc-r8a7791",
 				  "scif1_data_d", "scif1"),
+	/* I2C1 */
+	PIN_MAP_MUX_GROUP_DEFAULT("i2c-rcar_gen2.1", "pfc-r8a7791",
+				  "i2c1_e", "i2c1"),
+	/* I2C2 */
+	PIN_MAP_MUX_GROUP_DEFAULT("i2c-rcar_gen2.2", "pfc-r8a7791",
+				  "i2c2", "i2c2"),
+	/* I2C4 */
+	PIN_MAP_MUX_GROUP_DEFAULT("i2c-rcar_gen2.4", "pfc-r8a7791",
+				  "i2c4_c", "i2c4"),
 };
 
 static void __init koelsch_add_standard_devices(void)
@@ -209,6 +250,11 @@ static void __init koelsch_add_standard_devices(void)
 	koelsch_add_du_device();
 
 	platform_device_register_full(&sata0_info);
+
+	koelsch_add_i2c(1);
+	koelsch_add_i2c(2);
+	koelsch_add_i2c(4);
+	koelsch_add_i2c(5);
 }
 
 /*
-- 
1.8.3.1