[ARM] 5374/1: The w90p910 uart0 driver patch

Add W90P910 UART0 support,the W90P910 UART0 is 8250 series.

Signed-off-by: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-w90x900/cpu.h

@@ -43,6 +43,7 @@ extern void w90p910_init_io(struct map_desc *mach_desc, int size);
 extern void w90p910_init_uarts(struct w90x900_uartcfg *cfg, int no);
 extern void w90p910_init_clocks(int xtal);
 extern void w90p910_map_io(struct map_desc *mach_desc, int size);
+extern struct platform_device w90p910_serial_device;
 extern struct sys_timer w90x900_timer;
 
 #define W90X900_RES(name)				\
@@ -67,11 +68,13 @@ struct platform_device w90x900_##devname = {				\
 	.resource 	= w90x900_##regname##_resource,			\
 }
 
-#define W90X900_UARTCFG(port, flag, uc, ulc, ufc)	\
-{							\
-		.hwport	= port,				\
-		.flags	= flag,				\
-		.ucon	= uc,				\
-		.ulcon	= ulc,				\
-		.ufcon	= ufc,				\
+#define W90X900_8250PORT(name)					\
+{								\
+	.membase	= name##_BA,				\
+	.mapbase	= name##_PA,				\
+	.irq		= IRQ_##name,				\
+	.uartclk	= 11313600,				\
+	.regshift	= 2,					\
+	.iotype		= UPIO_MEM,				\
+	.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,	\
 }

arch/arm/mach-w90x900/mach-w90p910evb.c

@@ -36,24 +36,16 @@
 static struct map_desc w90p910_iodesc[] __initdata = {
 };
 
-static struct w90x900_uartcfg w90p910_uartcfgs[] = {
-	W90X900_UARTCFG(0, 0, 0, 0, 0),
-	W90X900_UARTCFG(1, 0, 0, 0, 0),
-	W90X900_UARTCFG(2, 0, 0, 0, 0),
-	W90X900_UARTCFG(3, 0, 0, 0, 0),
-	W90X900_UARTCFG(4, 0, 0, 0, 0),
-};
-
 /*Here should be your evb resourse,such as LCD*/
 
 static struct platform_device *w90p910evb_dev[] __initdata = {
+	&w90p910_serial_device,
 };
 
 static void __init w90p910evb_map_io(void)
 {
 	w90p910_map_io(w90p910_iodesc, ARRAY_SIZE(w90p910_iodesc));
 	w90p910_init_clocks(0);
-	w90p910_init_uarts(w90p910_uartcfgs, ARRAY_SIZE(w90p910_uartcfgs));
 }
 
 static void __init w90p910evb_init(void)

arch/arm/mach-w90x900/w90p910.c

@@ -25,6 +25,7 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>
+#include <linux/serial_8250.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -36,12 +37,6 @@
 
 #include "cpu.h"
 
-/*W90P910 has five uarts*/
-
-#define MAX_UART_COUNT 5
-static int uart_count;
-static struct platform_device *uart_devs[MAX_UART_COUNT-1];
-
 /* Initial IO mappings */
 
 static struct map_desc w90p910_iodesc[] __initdata = {
@@ -53,48 +48,19 @@ static struct map_desc w90p910_iodesc[] __initdata = {
 	/*IODESC_ENT(LCD),*/
 };
 
-/*Init the dev resource*/
-
-static W90X900_RES(UART0);
-static W90X900_RES(UART1);
-static W90X900_RES(UART2);
-static W90X900_RES(UART3);
-static W90X900_RES(UART4);
-static W90X900_DEVICE(uart0, UART0, 0, "w90x900-uart");
-static W90X900_DEVICE(uart1, UART1, 1, "w90x900-uart");
-static W90X900_DEVICE(uart2, UART2, 2, "w90x900-uart");
-static W90X900_DEVICE(uart3, UART3, 3, "w90x900-uart");
-static W90X900_DEVICE(uart4, UART4, 4, "w90x900-uart");
-
-static struct platform_device *uart_devices[] __initdata = {
-	&w90x900_uart0,
-	&w90x900_uart1,
-	&w90x900_uart2,
-	&w90x900_uart3,
-	&w90x900_uart4
-};
+/* Initial serial platform data */
 
-/*Init W90P910 uart device*/
+struct plat_serial8250_port w90p910_uart_data[] = {
+	W90X900_8250PORT(UART0),
+};
 
-void __init w90p910_init_uarts(struct w90x900_uartcfg *cfg, int no)
-{
-	struct platform_device *platdev;
-	int uart, uartdev;
-
-	/*By min() to judge count of uart be used indeed*/
-
-	uartdev = ARRAY_SIZE(uart_devices);
-	no = min(uartdev, no);
-
-	for (uart = 0; uart < no; uart++, cfg++) {
-		if (cfg->hwport != uart)
-			printk(KERN_ERR "w90x900_uartcfg[%d] error\n", uart);
-		platdev = uart_devices[cfg->hwport];
-		uart_devs[uart] = platdev;
-		platdev->dev.platform_data = cfg;
-	}
-	uart_count = uart;
-}
+struct platform_device w90p910_serial_device = {
+	.name			= "serial8250",
+	.id			= PLAT8250_DEV_PLATFORM,
+	.dev			= {
+		.platform_data	= w90p910_uart_data,
+	},
+};
 
 /*Init W90P910 evb io*/
 
@@ -122,13 +88,6 @@ static int __init w90p910_init_cpu(void)
 
 static int __init w90x900_arch_init(void)
 {
-	int ret;
-
-	ret = w90p910_init_cpu();
-	if (ret != 0)
-		return ret;
-
-	return platform_add_devices(uart_devs, uart_count);
-
+	return w90p910_init_cpu();
 }
 arch_initcall(w90x900_arch_init);