diff options
| author | Nick Bowler <nbowler@elliptictech.com> | 2012-11-05 22:45:49 +0100 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2012-11-07 13:48:43 +0100 |
| commit | aaf5e0be79e37d5a8509f09852788fa6a82522b2 (patch) | |
| tree | 0a836f40209121408cf83e74d629239c20ac16ca /arch/arm/mach-zynq | |
| parent | ARM: zynq: dts: add description of the second uart (diff) | |
| download | linux-aaf5e0be79e37d5a8509f09852788fa6a82522b2.tar.xz linux-aaf5e0be79e37d5a8509f09852788fa6a82522b2.zip | |
ARM: zynq: Allow UART1 to be used as DEBUG_LL console.
The main UART on the Xilinx ZC702 board is UART1, located at address
e0001000. Add a Kconfig option to select this device as the low-level
debugging port. This allows the really early boot printouts to reach
the USB serial adaptor on this board.
For consistency's sake, add a choice entry for UART0 even though it is
the the default if UART1 is not selected.
Signed-off-by: Nick Bowler <nbowler@elliptictech.com>
Tested-by: Josh Cartwright <josh.cartwright@ni.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'arch/arm/mach-zynq')
| -rw-r--r-- | arch/arm/mach-zynq/common.c | 6 | ||||
| -rw-r--r-- | arch/arm/mach-zynq/include/mach/zynq_soc.h | 16 |
2 files changed, 14 insertions, 8 deletions
diff --git a/arch/arm/mach-zynq/common.c b/arch/arm/mach-zynq/common.c index 6f058258b491..f0eef848c0d0 100644 --- a/arch/arm/mach-zynq/common.c +++ b/arch/arm/mach-zynq/common.c @@ -85,9 +85,9 @@ static struct map_desc io_desc[] __initdata = { #ifdef CONFIG_DEBUG_LL { - .virtual = UART0_VIRT, - .pfn = __phys_to_pfn(UART0_PHYS), - .length = UART0_SIZE, + .virtual = LL_UART_VADDR, + .pfn = __phys_to_pfn(LL_UART_PADDR), + .length = UART_SIZE, .type = MT_DEVICE, }, #endif diff --git a/arch/arm/mach-zynq/include/mach/zynq_soc.h b/arch/arm/mach-zynq/include/mach/zynq_soc.h index 1b8bf0ecbcb0..5ebbd8e6eeee 100644 --- a/arch/arm/mach-zynq/include/mach/zynq_soc.h +++ b/arch/arm/mach-zynq/include/mach/zynq_soc.h @@ -25,8 +25,9 @@ * address that is known to work. */ #define UART0_PHYS 0xE0000000 -#define UART0_SIZE SZ_4K -#define UART0_VIRT 0xF0001000 +#define UART1_PHYS 0xE0001000 +#define UART_SIZE SZ_4K +#define UART_VIRT 0xF0001000 #define TTC0_PHYS 0xF8001000 #define TTC0_SIZE SZ_4K @@ -36,12 +37,17 @@ #define SCU_PERIPH_SIZE SZ_8K #define SCU_PERIPH_VIRT (TTC0_VIRT - SCU_PERIPH_SIZE) +#if IS_ENABLED(CONFIG_DEBUG_ZYNQ_UART1) +# define LL_UART_PADDR UART1_PHYS +#else +# define LL_UART_PADDR UART0_PHYS +#endif + +#define LL_UART_VADDR UART_VIRT + /* The following are intended for the devices that are mapped early */ #define TTC0_BASE IOMEM(TTC0_VIRT) #define SCU_PERIPH_BASE IOMEM(SCU_PERIPH_VIRT) -#define LL_UART_PADDR UART0_PHYS -#define LL_UART_VADDR UART0_VIRT - #endif |