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>

6 files changed, 135 insertions, 65 deletions

diff --git a/arch/arm/mach-davinci/dm355.c b/arch/arm/mach-davinci/dm355.c
index 757def752010..4c3257ef5ddc 100644
--- a/arch/arm/mach-davinci/dm355.c
+++ b/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>
 #include <linux/gpio.h>
@@ -27,6 +28,7 @@
 #include <mach/mux.h>
 #include <mach/irqs.h>
 #include <mach/time.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)
diff --git a/arch/arm/mach-davinci/dm644x.c b/arch/arm/mach-davinci/dm644x.c
index cfd918e41e2d..a5629864d029 100644
--- a/arch/arm/mach-davinci/dm644x.c
+++ b/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 <linux/gpio.h>
 
@@ -24,6 +25,7 @@
 #include <mach/psc.h>
 #include <mach/mux.h>
 #include <mach/time.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)
diff --git a/arch/arm/mach-davinci/dm646x.c b/arch/arm/mach-davinci/dm646x.c
index f980c2f95de4..544658e58854 100644
--- a/arch/arm/mach-davinci/dm646x.c
+++ b/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 <linux/gpio.h>
 
@@ -24,6 +25,7 @@
 #include <mach/psc.h>
 #include <mach/mux.h>
 #include <mach/time.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)
diff --git a/arch/arm/mach-davinci/include/mach/common.h b/arch/arm/mach-davinci/include/mach/common.h
index 06ff6d6e3678..9624e0382536 100644
--- a/arch/arm/mach-davinci/include/mach/common.h
+++ b/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_soc_info;
diff --git a/arch/arm/mach-davinci/include/mach/serial.h b/arch/arm/mach-davinci/include/mach/serial.h
index 761ab2b483a0..b0c57fa9e4ee 100644
--- a/arch/arm/mach-davinci/include/mach/serial.h
+++ b/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 */
diff --git a/arch/arm/mach-davinci/serial.c b/arch/arm/mach-davinci/serial.c
index 695075796522..c530c7333d0a 100644
--- a/arch/arm/mach-davinci/serial.c
+++ b/arch/arm/mach-davinci/serial.c
@@ -33,6 +33,8 @@
 #include <mach/serial.h>
 #include <mach/irqs.h>
 #include <mach/cputype.h>
+#include <mach/common.h>
+
 #include "clock.h"
 
 static inline unsigned int serial_read_reg(struct plat_serial8250_port *up,
@@ -49,44 +51,6 @@ static inline void serial_write_reg(struct plat_serial8250_port *p, int offset,
         __raw_writel(value, IO_ADDRESS(p->mapbase) + offset);
 }
 
-static struct plat_serial8250_port 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 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;
@@ -106,35 +70,22 @@ 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 davinci_soc_info *soc_info = &davinci_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.
+         * You have to mux them off in device drivers later on if not needed.
          */
-        for (i = 0; i < DAVINCI_MAX_NR_UARTS; i++) {
-                struct plat_serial8250_port *p = serial_platform_data + i;
-
-                if (!(info->enabled_uarts & (1 << i))) {
-                        p->flags = 0;
+        for (i = 0; i < DAVINCI_MAX_NR_UARTS; i++, p++) {
+                if (!(info->enabled_uarts & (1 << i)))
                         continue;
-                }
-
-                if (cpu_is_davinci_dm646x())
-                        p->iotype = UPIO_MEM32;
-
-                if (cpu_is_davinci_dm355()) {
-                        if (i == 2) {
-                                p->mapbase = (unsigned long)DM355_UART2_BASE;
-                                p->irq = IRQ_DM355_UARTINT2;
-                        }
-                }
 
                 sprintf(name, "uart%d", i);
                 uart_clk = clk_get(dev, name);
@@ -147,11 +98,6 @@ void __init davinci_serial_init(struct davinci_uart_config *info)
                         davinci_serial_reset(p);
                 }
         }
-}
 
-static int __init davinci_init(void)
-{
-        return platform_device_register(&serial_device);
+        return platform_device_register(soc_info->serial_dev);
 }
-
-arch_initcall(davinci_init);