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socfpga: map uart into virtual address space so that early_printk() works

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Early printk code needs UART to be mapped early during
boot. early_printk() is left there during the start-up; it is useful
as our emulators are fairly slow.

Signed-off-by: Pavel Machek <pavel@denx.de>
Acked-by: Dinh Nguyen <dinguyen@altera.com>
[olof: removed redundant newlines]
Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Pavel Machek 2012-10-29 01:27:24 +01:00 committed by Olof Johansson
parent ad208d03a5
commit ef21b491bf
1 changed files with 9 additions and 0 deletions
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9
arch/arm/mach-socfpga/socfpga.c
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@ -37,6 +37,13 @@ static struct map_desc scu_io_desc __initdata = {
.type = MT_DEVICE,
};
static struct map_desc uart_io_desc __initdata = {
.virtual = 0xfec02000,
.pfn = __phys_to_pfn(0xffc02000),
.length = SZ_8K,
.type = MT_DEVICE,
};
static void __init socfpga_scu_map_io(void)
{
unsigned long base;
@ -51,6 +58,8 @@ static void __init socfpga_scu_map_io(void)
static void __init socfpga_map_io(void)
{
socfpga_scu_map_io();
iotable_init(&uart_io_desc, 1);
early_printk("Early printk initialized\n");
}
const static struct of_device_id irq_match[] = {