From: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Date: Wed, 3 Feb 2010 12:02:48 +0000 (+0100)
Subject: ARM: 5913/1: ARM U8500: add I2C platform configurations
X-Git-Tag: 2.1b_release~9350^2~4^8~6
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d48a41c181c8abdb8b09f746e02839c6161dc3ea;p=platform%2Fkernel%2Fkernel-mfld-blackbay.git

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
--- 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));