[PATCH] arm/imx6: Add debug UART2

[Shawn Guo]

On Fri, Apr 27, 2012 at 10:15:45AM +0200, Dirk Behme wrote:
> To be able to enable early debugging on boards using the UART2 for the
> console, add the option for early debugging on UART2.
> 
> Signed-off-by: Dirk Behme <dirk.behme at de.bosch.com>
> CC: Shawn Guo <shawn.guo at linaro.org>

Applied with subject reworked as below.

  ARM: imx6: Add UART2 for low-level debug

Please note that arm-soc maintainers require the subject prefix in the
form of "ARM: <platform>: ..."

Thanks,
Shawn

> ---
>  arch/arm/Kconfig.debug                       |    8 ++++++++
>  arch/arm/mach-imx/lluart.c                   |    6 ++++++
>  arch/arm/plat-mxc/include/mach/debug-macro.S |    2 ++
>  arch/arm/plat-mxc/include/mach/mx6q.h        |    2 ++
>  4 files changed, 18 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
> index 85348a0..0f876c2 100644
> --- a/arch/arm/Kconfig.debug
> +++ b/arch/arm/Kconfig.debug
> @@ -180,6 +180,14 @@ choice
>  		  Say Y here if you want kernel low-level debugging support
>  		  on i.MX50 or i.MX53.
>  
> +	config DEBUG_IMX6Q_UART2
> +		bool "i.MX6Q Debug UART2"
> +		depends on SOC_IMX6Q
> +		help
> +		  Say Y here if you want kernel low-level debugging support
> +		  on i.MX6Q UART2. This is correct for e.g. the SabreLite
> +                  board.
> +
>  	config DEBUG_IMX6Q_UART4
>  		bool "i.MX6Q Debug UART4"
>  		depends on SOC_IMX6Q
> diff --git a/arch/arm/mach-imx/lluart.c b/arch/arm/mach-imx/lluart.c
> index 0213f8d..c40a34c 100644
> --- a/arch/arm/mach-imx/lluart.c
> +++ b/arch/arm/mach-imx/lluart.c
> @@ -17,6 +17,12 @@
>  #include <mach/hardware.h>
>  
>  static struct map_desc imx_lluart_desc = {
> +#ifdef CONFIG_DEBUG_IMX6Q_UART2
> +	.virtual	= MX6Q_IO_P2V(MX6Q_UART2_BASE_ADDR),
> +	.pfn		= __phys_to_pfn(MX6Q_UART2_BASE_ADDR),
> +	.length		= MX6Q_UART2_SIZE,
> +	.type		= MT_DEVICE,
> +#endif
>  #ifdef CONFIG_DEBUG_IMX6Q_UART4
>  	.virtual	= MX6Q_IO_P2V(MX6Q_UART4_BASE_ADDR),
>  	.pfn		= __phys_to_pfn(MX6Q_UART4_BASE_ADDR),
> diff --git a/arch/arm/plat-mxc/include/mach/debug-macro.S b/arch/arm/plat-mxc/include/mach/debug-macro.S
> index 8ddda36..761e45f 100644
> --- a/arch/arm/plat-mxc/include/mach/debug-macro.S
> +++ b/arch/arm/plat-mxc/include/mach/debug-macro.S
> @@ -24,6 +24,8 @@
>  #define UART_PADDR	MX51_UART1_BASE_ADDR
>  #elif defined (CONFIG_DEBUG_IMX50_IMX53_UART)
>  #define UART_PADDR	MX53_UART1_BASE_ADDR
> +#elif defined (CONFIG_DEBUG_IMX6Q_UART2)
> +#define UART_PADDR	MX6Q_UART2_BASE_ADDR
>  #elif defined (CONFIG_DEBUG_IMX6Q_UART4)
>  #define UART_PADDR	MX6Q_UART4_BASE_ADDR
>  #endif
> diff --git a/arch/arm/plat-mxc/include/mach/mx6q.h b/arch/arm/plat-mxc/include/mach/mx6q.h
> index 254a561..f7e7dba 100644
> --- a/arch/arm/plat-mxc/include/mach/mx6q.h
> +++ b/arch/arm/plat-mxc/include/mach/mx6q.h
> @@ -27,6 +27,8 @@
>  #define MX6Q_CCM_SIZE			0x4000
>  #define MX6Q_ANATOP_BASE_ADDR		0x020c8000
>  #define MX6Q_ANATOP_SIZE		0x1000
> +#define MX6Q_UART2_BASE_ADDR		0x021e8000
> +#define MX6Q_UART2_SIZE			0x4000
>  #define MX6Q_UART4_BASE_ADDR		0x021f0000
>  #define MX6Q_UART4_SIZE			0x4000
>  
> -- 
> 1.7.0.4
>