davinci: Move serial platform_device into SoC-specific files

Currently, there is one set of platform_device and platform_data
structures for all DaVinci SoCs.  The differences in the data
between the various SoCs is handled by davinci_serial_init()
by checking the SoC type.  However, as new SoCs appear, this
routine will become more & more cluttered.

To clean up the routine and make it easier to add support for new
SoCs, move the platform_device and platform_data structures into the
SoC-specific code and use the SoC infrastructure to provide access
to the data.

In the process, fix a bug where the wrong irq is used for uart2
of the dm646x.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

arch/arm/mach-davinci/dm355.c

@@ -11,6 +11,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/clk.h>
+#include <linux/serial_8250.h>
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
 
@@ -27,6 +28,7 @@
 #include <mach/irqs.h>
 #include <mach/time.h>
 #include <mach/gpio.h>
+#include <mach/serial.h>
 #include <mach/common.h>
 
 #include "clock.h"
@@ -630,6 +632,44 @@ struct davinci_timer_info dm355_timer_info = {
 	.clocksource_id	= T0_TOP,
 };
 
+static struct plat_serial8250_port dm355_serial_platform_data[] = {
+	{
+		.mapbase	= DAVINCI_UART0_BASE,
+		.irq		= IRQ_UARTINT0,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
+				  UPF_IOREMAP,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+	},
+	{
+		.mapbase	= DAVINCI_UART1_BASE,
+		.irq		= IRQ_UARTINT1,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
+				  UPF_IOREMAP,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+	},
+	{
+		.mapbase	= DM355_UART2_BASE,
+		.irq		= IRQ_DM355_UARTINT2,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
+				  UPF_IOREMAP,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+	},
+	{
+		.flags		= 0
+	},
+};
+
+static struct platform_device dm355_serial_device = {
+	.name			= "serial8250",
+	.id			= PLAT8250_DEV_PLATFORM,
+	.dev			= {
+		.platform_data	= dm355_serial_platform_data,
+	},
+};
+
 static struct davinci_soc_info davinci_soc_info_dm355 = {
 	.io_desc		= dm355_io_desc,
 	.io_desc_num		= ARRAY_SIZE(dm355_io_desc),
@@ -651,6 +691,7 @@ static struct davinci_soc_info davinci_soc_info_dm355 = {
 	.gpio_base		= IO_ADDRESS(DAVINCI_GPIO_BASE),
 	.gpio_num		= 104,
 	.gpio_irq		= IRQ_DM355_GPIOBNK0,
+	.serial_dev		= &dm355_serial_device,
 };
 
 void __init dm355_init(void)

arch/arm/mach-davinci/dm644x.c

@@ -11,6 +11,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/clk.h>
+#include <linux/serial_8250.h>
 #include <linux/platform_device.h>
 
 #include <asm/mach/map.h>
@@ -24,6 +25,7 @@
 #include <mach/mux.h>
 #include <mach/time.h>
 #include <mach/gpio.h>
+#include <mach/serial.h>
 #include <mach/common.h>
 
 #include "clock.h"
@@ -573,6 +575,44 @@ struct davinci_timer_info dm644x_timer_info = {
 	.clocksource_id	= T0_TOP,
 };
 
+static struct plat_serial8250_port dm644x_serial_platform_data[] = {
+	{
+		.mapbase	= DAVINCI_UART0_BASE,
+		.irq		= IRQ_UARTINT0,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
+				  UPF_IOREMAP,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+	},
+	{
+		.mapbase	= DAVINCI_UART1_BASE,
+		.irq		= IRQ_UARTINT1,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
+				  UPF_IOREMAP,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+	},
+	{
+		.mapbase	= DAVINCI_UART2_BASE,
+		.irq		= IRQ_UARTINT2,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
+				  UPF_IOREMAP,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+	},
+	{
+		.flags		= 0
+	},
+};
+
+static struct platform_device dm644x_serial_device = {
+	.name			= "serial8250",
+	.id			= PLAT8250_DEV_PLATFORM,
+	.dev			= {
+		.platform_data	= dm644x_serial_platform_data,
+	},
+};
+
 static struct davinci_soc_info davinci_soc_info_dm644x = {
 	.io_desc		= dm644x_io_desc,
 	.io_desc_num		= ARRAY_SIZE(dm644x_io_desc),
@@ -594,6 +634,7 @@ static struct davinci_soc_info davinci_soc_info_dm644x = {
 	.gpio_base		= IO_ADDRESS(DAVINCI_GPIO_BASE),
 	.gpio_num		= 71,
 	.gpio_irq		= IRQ_GPIOBNK0,
+	.serial_dev		= &dm644x_serial_device,
 };
 
 void __init dm644x_init(void)

arch/arm/mach-davinci/dm646x.c

@@ -11,6 +11,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/clk.h>
+#include <linux/serial_8250.h>
 #include <linux/platform_device.h>
 
 #include <asm/mach/map.h>
@@ -24,6 +25,7 @@
 #include <mach/mux.h>
 #include <mach/time.h>
 #include <mach/gpio.h>
+#include <mach/serial.h>
 #include <mach/common.h>
 
 #include "clock.h"
@@ -552,6 +554,44 @@ struct davinci_timer_info dm646x_timer_info = {
 	.clocksource_id	= T0_TOP,
 };
 
+static struct plat_serial8250_port dm646x_serial_platform_data[] = {
+	{
+		.mapbase	= DAVINCI_UART0_BASE,
+		.irq		= IRQ_UARTINT0,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
+				  UPF_IOREMAP,
+		.iotype		= UPIO_MEM32,
+		.regshift	= 2,
+	},
+	{
+		.mapbase	= DAVINCI_UART1_BASE,
+		.irq		= IRQ_UARTINT1,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
+				  UPF_IOREMAP,
+		.iotype		= UPIO_MEM32,
+		.regshift	= 2,
+	},
+	{
+		.mapbase	= DAVINCI_UART2_BASE,
+		.irq		= IRQ_DM646X_UARTINT2,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
+				  UPF_IOREMAP,
+		.iotype		= UPIO_MEM32,
+		.regshift	= 2,
+	},
+	{
+		.flags		= 0
+	},
+};
+
+static struct platform_device dm646x_serial_device = {
+	.name			= "serial8250",
+	.id			= PLAT8250_DEV_PLATFORM,
+	.dev			= {
+		.platform_data	= dm646x_serial_platform_data,
+	},
+};
+
 static struct davinci_soc_info davinci_soc_info_dm646x = {
 	.io_desc		= dm646x_io_desc,
 	.io_desc_num		= ARRAY_SIZE(dm646x_io_desc),
@@ -573,6 +613,7 @@ static struct davinci_soc_info davinci_soc_info_dm646x = {
 	.gpio_base		= IO_ADDRESS(DAVINCI_GPIO_BASE),
 	.gpio_num		= 43, /* Only 33 usable */
 	.gpio_irq		= IRQ_DM646X_GPIOBNK0,
+	.serial_dev		= &dm646x_serial_device,
 };
 
 void __init dm646x_init(void)

arch/arm/mach-davinci/include/mach/common.h

@@ -61,6 +61,7 @@ struct davinci_soc_info {
 	void __iomem			*gpio_base;
 	unsigned			gpio_num;
 	unsigned			gpio_irq;
+	struct platform_device		*serial_dev;
 };
 
 extern struct davinci_soc_info *davinci_get_soc_info(void);

arch/arm/mach-davinci/include/mach/serial.h

@@ -30,6 +30,6 @@ struct davinci_uart_config {
 	unsigned int enabled_uarts;
 };
 
-extern void davinci_serial_init(struct davinci_uart_config *);
+extern int davinci_serial_init(struct davinci_uart_config *);
 
 #endif /* __ASM_ARCH_SERIAL_H */

arch/arm/mach-davinci/serial.c

@@ -33,6 +33,8 @@
 #include <mach/serial.h>
 #include <mach/irqs.h>
 #include <mach/cpu.h>
+#include <mach/common.h>
+
 #include "clock.h"
 
 static inline unsigned int serial_read_reg(struct plat_serial8250_port *up,
@@ -49,32 +51,6 @@ static inline void serial_write_reg(struct plat_serial8250_port *p, int offset,
 	__raw_writel(value, IO_ADDRESS(p->mapbase) + offset);
 }
 
-static const resource_size_t serial_mapbase[] = {
-	DAVINCI_UART0_BASE,
-	DAVINCI_UART1_BASE,
-	DAVINCI_UART2_BASE,
-};
-
-static const unsigned int serial_irq[] = {
-	IRQ_UARTINT0,
-	IRQ_UARTINT1,
-	IRQ_UARTINT2,
-};
-
-/*
- * The additional entry is present because the list must be terminated with a
- * zero flags entry.
- */
-static struct plat_serial8250_port serial_platform_data[DAVINCI_MAX_NR_UARTS + 1];
-
-static struct platform_device serial_device = {
-	.name			= "serial8250",
-	.id			= PLAT8250_DEV_PLATFORM,
-	.dev			= {
-		.platform_data	= serial_platform_data,
-	},
-};
-
 static void __init davinci_serial_reset(struct plat_serial8250_port *p)
 {
 	unsigned int pwremu = 0;
@@ -94,39 +70,23 @@ static void __init davinci_serial_reset(struct plat_serial8250_port *p)
 				 UART_DM646X_SCR_TX_WATERMARK);
 }
 
-void __init davinci_serial_init(struct davinci_uart_config *info)
+int __init davinci_serial_init(struct davinci_uart_config *info)
 {
 	int i;
 	char name[16];
 	struct clk *uart_clk;
-	struct device *dev = &serial_device.dev;
-	struct plat_serial8250_port *p = serial_platform_data;
+	struct davinci_soc_info *soc_info = davinci_get_soc_info();
+	struct device *dev = &soc_info->serial_dev->dev;
+	struct plat_serial8250_port *p = dev->platform_data;
 
 	/*
 	 * Make sure the serial ports are muxed on at this point.
 	 * You have to mux them off in device drivers later on if not needed.
 	 */
-	for (i = 0; i < DAVINCI_MAX_NR_UARTS; i++) {
+	for (i = 0; i < DAVINCI_MAX_NR_UARTS; i++, p++) {
 		if (!(info->enabled_uarts & (1 << i)))
 			continue;
 
-		/* fill-in common members */
-		p->flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP;
-		p->regshift = 2;
-
-		if (cpu_is_davinci_dm646x())
-			p->iotype = UPIO_MEM32;
-		else
-			p->iotype = UPIO_MEM;
-
-		if (cpu_is_davinci_dm355() && (i == 2)) {
-			p->mapbase = DM355_UART2_BASE;
-			p->irq = IRQ_DM355_UARTINT2;
-		} else {
-			p->mapbase = serial_mapbase[i];
-			p->irq = serial_irq[i];
-		}
-
 		sprintf(name, "uart%d", i);
 		uart_clk = clk_get(dev, name);
 		p->uartclk = clk_get_rate(uart_clk);
@@ -137,17 +97,7 @@ void __init davinci_serial_init(struct davinci_uart_config *info)
 			clk_enable(uart_clk);
 			davinci_serial_reset(p);
 		}
-
-		p++; /* Point to next entry */
 	}
 
-	/* Terminate the list with a zero flags entry */
-	p->flags = 0;
+	return platform_device_register(soc_info->serial_dev);
 }
-
-static int __init davinci_init(void)
-{
-	return platform_device_register(&serial_device);
-}
-
-arch_initcall(davinci_init);