linux/arch/arm/mach-imx/lluart.c
Shawn Guo 49c9e60eaa ARM: imx6q: let users input debug uart port number
imx6q gets 5 uart ports in total.  Different board design may choose
different port as debug uart.  For example, imx6q-sabresd uses UART1,
imx6q-sabrelite uses UART2 and imx6q-arm2 uses UART4.  Rather than
bloating DEBUG_LL choice list with all these uart ports, the patch
introduces DEBUG_IMX6Q_UART_PORT for users to input uart port number
when DEBUG_IMX6Q_UART is selected inside DEBUG_LL choice.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
2012-11-16 14:18:52 +08:00

47 lines
1.3 KiB
C

/*
* Copyright 2011 Freescale Semiconductor, Inc.
* Copyright 2011 Linaro Ltd.
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/init.h>
#include <asm/page.h>
#include <asm/sizes.h>
#include <asm/mach/map.h>
#include "hardware.h"
#define IMX6Q_UART1_BASE_ADDR 0x02020000
#define IMX6Q_UART2_BASE_ADDR 0x021e8000
#define IMX6Q_UART3_BASE_ADDR 0x021ec000
#define IMX6Q_UART4_BASE_ADDR 0x021f0000
#define IMX6Q_UART5_BASE_ADDR 0x021f4000
/*
* IMX6Q_UART_BASE_ADDR is put in the middle to force the expansion
* of IMX6Q_UART##n##_BASE_ADDR.
*/
#define IMX6Q_UART_BASE_ADDR(n) IMX6Q_UART##n##_BASE_ADDR
#define IMX6Q_UART_BASE(n) IMX6Q_UART_BASE_ADDR(n)
#define IMX6Q_DEBUG_UART_BASE IMX6Q_UART_BASE(CONFIG_DEBUG_IMX6Q_UART_PORT)
static struct map_desc imx_lluart_desc = {
#ifdef CONFIG_DEBUG_IMX6Q_UART
.virtual = IMX_IO_P2V(IMX6Q_DEBUG_UART_BASE),
.pfn = __phys_to_pfn(IMX6Q_DEBUG_UART_BASE),
.length = 0x4000,
.type = MT_DEVICE,
#endif
};
void __init imx_lluart_map_io(void)
{
if (imx_lluart_desc.virtual)
iotable_init(&imx_lluart_desc, 1);
}