[ARM] mv78xx0: wire i2c support

All the pieces were ready, just matter of assembling
them together.

Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
Signed-off-by: Nicolas Pitre <nico@marvell.com>

4 files changed, 87 insertions, 0 deletions

diff --git a/arch/arm/mach-mv78xx0/common.c b/arch/arm/mach-mv78xx0/common.c
index 15f9913f4a90..a575daaa62d1 100644
--- a/arch/arm/mach-mv78xx0/common.c
+++ b/arch/arm/mach-mv78xx0/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/ethtool.h>
 #include <asm/mach/map.h>
@@ -518,6 +519,81 @@ void __init mv78xx0_ge11_init(struct mv643xx_eth_platform_data *eth_data)
         platform_device_register(&mv78xx0_ge11);
 }
 
+/*****************************************************************************
+ * I2C bus 0
+ ****************************************************************************/
+
+static struct mv64xxx_i2c_pdata mv78xx0_i2c_0_pdata = {
+        .freq_m         = 8, /* assumes 166 MHz TCLK */
+        .freq_n         = 3,
+        .timeout        = 1000, /* Default timeout of 1 second */
+};
+
+static struct resource mv78xx0_i2c_0_resources[] = {
+        {
+                .name   = "i2c 0 base",
+                .start  = I2C_0_PHYS_BASE,
+                .end    = I2C_0_PHYS_BASE + 0x1f,
+                .flags  = IORESOURCE_MEM,
+        }, {
+                .name   = "i2c 0 irq",
+                .start  = IRQ_MV78XX0_I2C_0,
+                .end    = IRQ_MV78XX0_I2C_0,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+
+static struct platform_device mv78xx0_i2c_0 = {
+        .name           = MV64XXX_I2C_CTLR_NAME,
+        .id             = 0,
+        .num_resources  = ARRAY_SIZE(mv78xx0_i2c_0_resources),
+        .resource       = mv78xx0_i2c_0_resources,
+        .dev            = {
+                .platform_data  = &mv78xx0_i2c_0_pdata,
+        },
+};
+
+/*****************************************************************************
+ * I2C bus 1
+ ****************************************************************************/
+
+static struct mv64xxx_i2c_pdata mv78xx0_i2c_1_pdata = {
+        .freq_m         = 8, /* assumes 166 MHz TCLK */
+        .freq_n         = 3,
+        .timeout        = 1000, /* Default timeout of 1 second */
+};
+
+static struct resource mv78xx0_i2c_1_resources[] = {
+        {
+                .name   = "i2c 1 base",
+                .start  = I2C_1_PHYS_BASE,
+                .end    = I2C_1_PHYS_BASE + 0x1f,
+                .flags  = IORESOURCE_MEM,
+        }, {
+                .name   = "i2c 1 irq",
+                .start  = IRQ_MV78XX0_I2C_1,
+                .end    = IRQ_MV78XX0_I2C_1,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+
+static struct platform_device mv78xx0_i2c_1 = {
+        .name           = MV64XXX_I2C_CTLR_NAME,
+        .id             = 1,
+        .num_resources  = ARRAY_SIZE(mv78xx0_i2c_1_resources),
+        .resource       = mv78xx0_i2c_1_resources,
+        .dev            = {
+                .platform_data  = &mv78xx0_i2c_1_pdata,
+        },
+};
+
+void __init mv78xx0_i2c_init(void)
+{
+        platform_device_register(&mv78xx0_i2c_0);
+        platform_device_register(&mv78xx0_i2c_1);
+}
 
 /*****************************************************************************
  * SATA
diff --git a/arch/arm/mach-mv78xx0/common.h b/arch/arm/mach-mv78xx0/common.h
index f6274db6192d..befc22475469 100644
--- a/arch/arm/mach-mv78xx0/common.h
+++ b/arch/arm/mach-mv78xx0/common.h
@@ -44,6 +44,7 @@ void mv78xx0_uart0_init(void);
 void mv78xx0_uart1_init(void);
 void mv78xx0_uart2_init(void);
 void mv78xx0_uart3_init(void);
+void mv78xx0_i2c_init(void);
 
 extern struct sys_timer mv78xx0_timer;
 
diff --git a/arch/arm/mach-mv78xx0/db78x00-bp-setup.c b/arch/arm/mach-mv78xx0/db78x00-bp-setup.c
index be0a59a6139e..efdabe04c69e 100644
--- a/arch/arm/mach-mv78xx0/db78x00-bp-setup.c
+++ b/arch/arm/mach-mv78xx0/db78x00-bp-setup.c
@@ -14,6 +14,7 @@
 #include <linux/ata_platform.h>
 #include <linux/mv643xx_eth.h>
 #include <linux/ethtool.h>
+#include <linux/i2c.h>
 #include <mach/mv78xx0.h>
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -39,6 +40,11 @@ static struct mv_sata_platform_data db78x00_sata_data = {
         .n_ports        = 2,
 };
 
+static struct i2c_board_info __initdata db78x00_i2c_rtc = {
+        I2C_BOARD_INFO("ds1338", 0x68),
+};
+
+
 static void __init db78x00_init(void)
 {
         /*
@@ -60,6 +66,8 @@ static void __init db78x00_init(void)
                 mv78xx0_sata_init(&db78x00_sata_data);
                 mv78xx0_uart0_init();
                 mv78xx0_uart2_init();
+                mv78xx0_i2c_init();
+                i2c_register_board_info(0, &db78x00_i2c_rtc, 1);
         } else {
                 mv78xx0_uart1_init();
                 mv78xx0_uart3_init();
diff --git a/arch/arm/mach-mv78xx0/include/mach/mv78xx0.h b/arch/arm/mach-mv78xx0/include/mach/mv78xx0.h
index 328a02e029a0..582cffc733ad 100644
--- a/arch/arm/mach-mv78xx0/include/mach/mv78xx0.h
+++ b/arch/arm/mach-mv78xx0/include/mach/mv78xx0.h
@@ -102,6 +102,8 @@
 #define DEV_BUS_VIRT_BASE       (MV78XX0_REGS_VIRT_BASE | 0x10000)
 #define  SAMPLE_AT_RESET_LOW    (DEV_BUS_VIRT_BASE | 0x0030)
 #define  SAMPLE_AT_RESET_HIGH   (DEV_BUS_VIRT_BASE | 0x0034)
+#define  I2C_0_PHYS_BASE        (DEV_BUS_PHYS_BASE | 0x1000)
+#define  I2C_1_PHYS_BASE        (DEV_BUS_PHYS_BASE | 0x1100)
 #define  UART0_PHYS_BASE        (DEV_BUS_PHYS_BASE | 0x2000)
 #define  UART0_VIRT_BASE        (DEV_BUS_VIRT_BASE | 0x2000)
 #define  UART1_PHYS_BASE        (DEV_BUS_PHYS_BASE | 0x2100)