ARM: 5913/1: ARM U8500: add I2C platform configurations

This adds platform configurations to support four
i2c controllers found on early MOP500 platform

This depends on the patch 5908/1 for build to succeed.

Signed-off-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mach-ux500/board-mop500.c b/arch/arm/mach-ux500/board-mop500.c
index f33dbb7..803aec1 100644 (file)
--- a/arch/arm/mach-ux500/board-mop500.c
+++ b/arch/arm/mach-ux500/board-mop500.c
@@ -22,6 +22,7 @@
 #include <asm/mach/arch.h>
 
 #include <plat/mtu.h>
+#include <plat/i2c.h>
 
 #include <mach/hardware.h>
 #include <mach/setup.h>
@@ -120,6 +121,70 @@ static struct amba_device pl031_device = {
        .irq = {IRQ_RTC_RTT, NO_IRQ},
 };
 
+#define U8500_I2C_RESOURCES(id, size)          \
+static struct resource u8500_i2c_resources_##id[] = {  \
+       [0] = {                                 \
+               .start  = U8500_I2C##id##_BASE, \
+               .end    = U8500_I2C##id##_BASE + size - 1, \
+               .flags  = IORESOURCE_MEM,       \
+       },                                      \
+       [1] = {                                 \
+               .start  = IRQ_I2C##id,          \
+               .end    = IRQ_I2C##id,          \
+               .flags  = IORESOURCE_IRQ        \
+       }                                       \
+}
+
+U8500_I2C_RESOURCES(0, SZ_4K);
+U8500_I2C_RESOURCES(1, SZ_4K);
+U8500_I2C_RESOURCES(2, SZ_4K);
+U8500_I2C_RESOURCES(3, SZ_4K);
+
+#define U8500_I2C_CONTROLLER(id, _slsu, _tft, _rft, clk, _sm) \
+static struct nmk_i2c_controller u8500_i2c_##id = { \
+       /*                              \
+        * slave data setup time, which is      \
+        * 250 ns,100ns,10ns which is 14,6,2    \
+        * respectively for a 48 Mhz    \
+        * i2c clock                    \
+        */                             \
+       .slsu           = _slsu,        \
+       /* Tx FIFO threshold */         \
+       .tft            = _tft,         \
+       /* Rx FIFO threshold */         \
+       .rft            = _rft,         \
+       /* std. mode operation */       \
+       .clk_freq       = clk,          \
+       .sm             = _sm,          \
+}
+
+/*
+ * The board uses 4 i2c controllers, initialize all of
+ * them with slave data setup time of 250 ns,
+ * Tx & Rx FIFO threshold values as 1 and standard
+ * mode of operation
+ */
+U8500_I2C_CONTROLLER(0, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
+U8500_I2C_CONTROLLER(1, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
+U8500_I2C_CONTROLLER(2,        0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
+U8500_I2C_CONTROLLER(3,        0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
+
+#define U8500_I2C_PDEVICE(cid)         \
+static struct platform_device i2c_controller##cid = { \
+       .name = "nmk-i2c",              \
+       .id      = cid,                 \
+       .num_resources = 2,             \
+       .resource = u8500_i2c_resources_##cid,  \
+       .dev = {                        \
+               .platform_data = &u8500_i2c_##cid \
+       }                               \
+}
+
+U8500_I2C_PDEVICE(0);
+U8500_I2C_PDEVICE(1);
+U8500_I2C_PDEVICE(2);
+U8500_I2C_PDEVICE(3);
+
 static struct amba_device *amba_devs[] __initdata = {
        &uart0_device,
        &uart1_device,
@@ -128,6 +193,14 @@ static struct amba_device *amba_devs[] __initdata = {
        &pl031_device,
 };
 
+/* add any platform devices here - TODO */
+static struct platform_device *platform_devs[] __initdata = {
+       &i2c_controller0,
+       &i2c_controller1,
+       &i2c_controller2,
+       &i2c_controller3,
+};
+
 static void __init u8500_timer_init(void)
 {
 #ifdef CONFIG_LOCAL_TIMERS
@@ -152,6 +225,8 @@ static void __init u8500_init_machine(void)
        for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
                amba_device_register(amba_devs[i], &iomem_resource);
 
+       platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
+
        spi_register_board_info(u8500_spi_devices,
                        ARRAY_SIZE(u8500_spi_devices));