Commit 17198f2d authored by wanzongshun's avatar wanzongshun Committed by Russell King
Browse files

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



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

Signed-off-by: default avatarWan ZongShun <mcuos.com@gmail.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent b74788d8

arch/arm/mach-w90x900/cpu.h

+10 −7
Original line number Diff line number Diff line
@@ -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)	\

#define W90X900_8250PORT(name)					\

{								\

		.hwport	= port,				\

		.flags	= flag,				\

		.ucon	= uc,				\

		.ulcon	= ulc,				\

		.ufcon	= ufc,				\

	.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

+1 −9
Original line number Diff line number Diff line
@@ -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

+13 −54
Original line number Diff line number Diff line
@@ -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

};



/*Init W90P910 uart device*/



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*/

/* Initial serial platform data */



	uartdev = ARRAY_SIZE(uart_devices);

	no = min(uartdev, no);

struct plat_serial8250_port w90p910_uart_data[] = {

	W90X900_8250PORT(UART0),

};



	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);