[PATCH 3/3][POWERPC][V2] Xilinx: boot support for Xilinx uart 16550.

[Grant Likely]

On Wed, Apr 2, 2008 at 10:52 AM, John Linn <john.linn at xilinx.com> wrote:
> The Xilinx 16550 uart core is not a standard 16550 because it uses
>  word-based addressing rather than byte-based adressing. With
>  additional properties it is compatible with the open firmware
>  'ns16550' compatible binding.
>
>  This code updates the ns16550 driver to use the reg-offset property
>  so that the Xilinx UART 16550 can be used with it. The reg-shift
>  was already being handled.
>
>  Signed-off-by: John Linn <john.linn at xilinx.com>

Acked-by: Grant Likely <grant.likely at secretlab.ca>

>  ---
>   arch/powerpc/boot/ns16550.c |    5 +++++
>   1 files changed, 5 insertions(+), 0 deletions(-)
>
>  diff --git a/arch/powerpc/boot/ns16550.c b/arch/powerpc/boot/ns16550.c
>  index f8f1b2f..da9d2c2 100644
>  --- a/arch/powerpc/boot/ns16550.c
>  +++ b/arch/powerpc/boot/ns16550.c
>  @@ -56,6 +56,7 @@ int ns16550_console_init(void *devp, struct serial_console_data *scdp)
>   {
>         int n;
>         unsigned long reg_phys;
>  +       u32 reg_offset;
>
>         n = getprop(devp, "virtual-reg", &reg_base, sizeof(reg_base));
>         if (n != sizeof(reg_base)) {
>  @@ -65,6 +66,10 @@ int ns16550_console_init(void *devp, struct serial_console_data *scdp)
>                 reg_base = (void *)reg_phys;
>         }
>
>  +       n = getprop(devp, "reg-offset", &reg_offset, sizeof(reg_offset));
>  +       if (n == sizeof(reg_offset))
>  +               reg_base += reg_offset;
>  +
>         n = getprop(devp, "reg-shift", &reg_shift, sizeof(reg_shift));
>         if (n != sizeof(reg_shift))
>                 reg_shift = 0;
>  --
>  1.5.2.1
>
>
>
>



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.