[ARM] Kirkwood: Hook up I2C

Hook up I2C on Marvell Kirkwood.  Tested on a QNAP TS-219 which has
RTC connected through I2C.

Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/arch/arm/mach-kirkwood/common.c b/arch/arm/mach-kirkwood/common.c
index 9f012551794d..19b03f62c3f4 100644
--- a/arch/arm/mach-kirkwood/common.c
+++ b/arch/arm/mach-kirkwood/common.c
@@ -14,6 +14,7 @@
 #include <linux/serial_8250.h>
 #include <linux/mbus.h>
 #include <linux/mv643xx_eth.h>
+#include <linux/mv643xx_i2c.h>
 #include <linux/ata_platform.h>
 #include <linux/spi/orion_spi.h>
 #include <net/dsa.h>
@@ -371,6 +372,45 @@ void __init kirkwood_spi_init()
 
 
 /*****************************************************************************
+ * I2C
+ ****************************************************************************/
+static struct mv64xxx_i2c_pdata kirkwood_i2c_pdata = {
+        .freq_m         = 8, /* assumes 166 MHz TCLK */
+        .freq_n         = 3,
+        .timeout        = 1000, /* Default timeout of 1 second */
+};
+
+static struct resource kirkwood_i2c_resources[] = {
+        {
+                .name   = "i2c",
+                .start  = I2C_PHYS_BASE,
+                .end    = I2C_PHYS_BASE + 0x1f,
+                .flags  = IORESOURCE_MEM,
+        }, {
+                .name   = "i2c",
+                .start  = IRQ_KIRKWOOD_TWSI,
+                .end    = IRQ_KIRKWOOD_TWSI,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device kirkwood_i2c = {
+        .name           = MV64XXX_I2C_CTLR_NAME,
+        .id             = 0,
+        .num_resources  = ARRAY_SIZE(kirkwood_i2c_resources),
+        .resource       = kirkwood_i2c_resources,
+        .dev            = {
+                .platform_data  = &kirkwood_i2c_pdata,
+        },
+};
+
+void __init kirkwood_i2c_init(void)
+{
+        platform_device_register(&kirkwood_i2c);
+}
+
+
+/*****************************************************************************
  * UART0
  ****************************************************************************/
 static struct plat_serial8250_port kirkwood_uart0_data[] = {