diff options
| author | Pavel Machek <pavel@denx.de> | 2012-10-29 01:27:24 +0100 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2012-11-05 09:17:20 -0800 |
| commit | ef21b491bfe0ddf2b61f1804271b0d2cc58e19f2 (patch) | |
| tree | 3e3d635815338b7380c8a578d5a4e61ee5ea9ccf /arch/arm/mach-socfpga | |
| parent | ad208d03a5a32957a419eb1a473aa96ff4da45ca (diff) | |
| download | linux-ef21b491bfe0ddf2b61f1804271b0d2cc58e19f2.tar.gz | |
socfpga: map uart into virtual address space so that early_printk() works
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>
Diffstat (limited to 'arch/arm/mach-socfpga')
| -rw-r--r-- | arch/arm/mach-socfpga/socfpga.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/mach-socfpga/socfpga.c b/arch/arm/mach-socfpga/socfpga.c index ab81ea91a7c4..6732924a5fee 100644 --- a/arch/arm/mach-socfpga/socfpga.c +++ b/arch/arm/mach-socfpga/socfpga.c @@ -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[] = { |