ARM: OMAP: Add support for high-speed I2C init

Omap2430 has additional support for high-speed I2C.

This patch moves I2C speed parameter (from module) to platform data.
Also added basic High Speed support based on I2C bus speed.
Signed-off-by: Syed Mohammed Khasim  <x0khasim@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/board-2430sdp.c

@@ -192,6 +192,78 @@ static struct omap_board_config_kernel sdp2430_config[] = {
 	{OMAP_TAG_UART, &sdp2430_uart_config},
 };
 
+#if	defined(CONFIG_I2C_OMAP) || defined(CONFIG_I2C_OMAP_MODULE)
+
+#define OMAP2_I2C_BASE1		0x48070000
+#define OMAP2_I2C_BASE2		0x48072000
+#define OMAP2_I2C_INT1		56
+#define OMAP2_I2C_INT2		57
+
+static u32 omap2_i2c1_clkrate	= 400;
+static u32 omap2_i2c2_clkrate	= 2600;
+
+static struct resource i2c_resources1[] = {
+	{
+		.start	= OMAP2_I2C_BASE1,
+		.end	= OMAP2_I2C_BASE1 + 0x3f,
+		.flags	= IORESOURCE_MEM,
+	},
+	{
+		.start	= OMAP2_I2C_INT1,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct resource i2c_resources2[] = {
+	{
+		.start	= OMAP2_I2C_BASE2,
+		.end	= OMAP2_I2C_BASE2 + 0x3f,
+		.flags	= IORESOURCE_MEM,
+	},
+	{
+		.start	= OMAP2_I2C_INT2,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device omap_i2c_device1 = {
+	.name		= "i2c_omap",
+	.id		= 1,
+	.num_resources	= ARRAY_SIZE(i2c_resources1),
+	.resource	= i2c_resources1,
+	.dev		= {
+		.platform_data	= &omap2_i2c1_clkrate,
+	},
+};
+
+static struct platform_device omap_i2c_device2 = {
+	.name		= "i2c_omap",
+	.id		= 2,
+	.num_resources	= ARRAY_SIZE(i2c_resources2),
+	.resource	= i2c_resources2,
+	.dev		= {
+		.platform_data	= &omap2_i2c2_clkrate,
+	},
+};
+
+static void omap_init_i2c(void)
+{
+	(void) platform_device_register(&omap_i2c_device2);
+	(void) platform_device_register(&omap_i2c_device1);
+}
+
+#else
+
+static void omap_init_i2c(void) {}
+
+#endif
+
+static int __init omap2430_i2c_init(void)
+{
+	omap_init_i2c();
+	return 0;
+}
+
 static void __init omap_2430sdp_init(void)
 {
 	platform_add_devices(sdp2430_devices, ARRAY_SIZE(sdp2430_devices));
@@ -205,6 +277,8 @@ static void __init omap_2430sdp_map_io(void)
 	omap2_map_common_io();
 }
 
+arch_initcall(omap2430_i2c_init);
+
 MACHINE_START(OMAP_2430SDP, "OMAP2430 sdp2430 board")
 	/* Maintainer: Syed Khasim - Texas Instruments Inc */
 	.phys_io	= 0x48000000,

arch/arm/mach-omap2/clock.h

@@ -1761,7 +1761,8 @@ static struct clk i2c2_fck = {
 };
 
 static struct clk i2chs2_fck = {
-	.name		= "i2chs2_fck",
+	.name		= "i2chs_fck",
+	.id		= 2,
 	.parent		= &func_96m_ck,
 	.flags		= CLOCK_IN_OMAP243X,
 	.enable_reg	= (void __iomem *)&CM_FCLKEN2_CORE,
@@ -1790,7 +1791,8 @@ static struct clk i2c1_fck = {
 };
 
 static struct clk i2chs1_fck = {
-	.name		= "i2chs1_fck",
+	.name		= "i2chs_fck",
+	.id		= 1,
 	.parent		= &func_96m_ck,
 	.flags		= CLOCK_IN_OMAP243X,
 	.enable_reg	= (void __iomem *)&CM_FCLKEN2_CORE,

arch/arm/mach-omap2/devices.c

@@ -25,11 +25,13 @@
 #include <asm/arch/gpio.h>
 #include <asm/arch/eac.h>
 
+#if	!defined(CONFIG_ARCH_OMAP243X)
 #if	defined(CONFIG_I2C_OMAP) || defined(CONFIG_I2C_OMAP_MODULE)
 
 #define OMAP2_I2C_BASE2		0x48072000
 #define OMAP2_I2C_INT2		57
 
+static u32 omap2_i2c2_clkrate	= 100;
 static struct resource i2c_resources2[] = {
 	{
 		.start		= OMAP2_I2C_BASE2,
@@ -47,6 +49,9 @@ static struct platform_device omap_i2c_device2 = {
 	.id             = 2,
 	.num_resources	= ARRAY_SIZE(i2c_resources2),
 	.resource	= i2c_resources2,
+	.dev		= {
+		.platform_data	= &omap2_i2c2_clkrate,
+	},
 };
 
 /* See also arch/arm/plat-omap/devices.c for first I2C on 24xx */
@@ -56,10 +61,9 @@ static void omap_init_i2c(void)
 	if (machine_is_omap_h4())
 		return;
 
-	if (!cpu_is_omap2430()) {
-		omap_cfg_reg(J15_24XX_I2C2_SCL);
-		omap_cfg_reg(H19_24XX_I2C2_SDA);
-	}
+	omap_cfg_reg(J15_24XX_I2C2_SCL);
+	omap_cfg_reg(H19_24XX_I2C2_SDA);
+
 	(void) platform_device_register(&omap_i2c_device2);
 }
 
@@ -67,6 +71,7 @@ static void omap_init_i2c(void)
 
 static void omap_init_i2c(void) {}
 
+#endif
 #endif
 
 #if defined(CONFIG_OMAP_DSP) || defined(CONFIG_OMAP_DSP_MODULE)
@@ -241,7 +246,9 @@ static int __init omap2_init_devices(void)
 	/* please keep these calls, and their implementations above,
 	 * in alphabetical order so they're easier to sort through.
 	 */
-	omap_init_i2c();
+	if (!cpu_is_omap2430()) {
+		omap_init_i2c();
+	}
 	omap_init_mbox();
 	omap_init_mcspi();
 	omap_init_sti();

arch/arm/plat-omap/devices.c

@@ -89,6 +89,7 @@ static inline void omap_init_dsp(void) { }
 #endif	/* CONFIG_OMAP_DSP */
 
 /*-------------------------------------------------------------------------*/
+#if	!defined(CONFIG_ARCH_OMAP243X)
 #if	defined(CONFIG_I2C_OMAP) || defined(CONFIG_I2C_OMAP_MODULE)
 
 #define	OMAP1_I2C_BASE		0xfffb3800
@@ -97,6 +98,8 @@ static inline void omap_init_dsp(void) { }
 #define OMAP1_I2C_INT		INT_I2C
 #define OMAP2_I2C_INT1		56
 
+static u32 omap2_i2c1_clkrate	= 100;
+
 static struct resource i2c_resources1[] = {
 	{
 		.start		= 0,
@@ -116,12 +119,15 @@ static struct platform_device omap_i2c_device1 = {
 	.id             = 1,
 	.num_resources	= ARRAY_SIZE(i2c_resources1),
 	.resource	= i2c_resources1,
+	.dev		= {
+		.platform_data	= &omap2_i2c1_clkrate,
+	},
 };
 
 /* See also arch/arm/mach-omap2/devices.c for second I2C on 24xx */
 static void omap_init_i2c(void)
 {
-	if (cpu_is_omap24xx()) {
+	if (cpu_is_omap242x()) {
 		i2c_resources1[0].start = OMAP2_I2C_BASE1;
 		i2c_resources1[0].end = OMAP2_I2C_BASE1 + OMAP_I2C_SIZE;
 		i2c_resources1[1].start = OMAP2_I2C_INT1;
@@ -151,7 +157,7 @@ static void omap_init_i2c(void)
 #else
 static inline void omap_init_i2c(void) {}
 #endif
-
+#endif
 /*-------------------------------------------------------------------------*/
 #if	defined(CONFIG_KEYBOARD_OMAP) || defined(CONFIG_KEYBOARD_OMAP_MODULE)
 
@@ -258,6 +264,7 @@ static struct omap_mmc_conf mmc2_conf;
 
 static u64 mmc2_dmamask = 0xffffffff;
 
+
 static struct resource mmc2_resources[] = {
 	{
 		.start		= OMAP_MMC2_BASE,
@@ -519,7 +526,9 @@ static int __init omap_init_devices(void)
 	omap_init_uwire();
 	omap_init_wdt();
 	omap_init_rng();
-	omap_init_i2c();
+	if (!cpu_is_omap2430()) {
+		omap_init_i2c();
+	}
 	return 0;
 }
 arch_initcall(omap_init_devices);