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authorJohn Linn <john.linn@xilinx.com>2008-04-02 12:52:14 -0400
committerJosh Boyer <jwboyer@linux.vnet.ibm.com>2008-04-24 14:32:46 -0400
commit2f0b45f846735b486c0383740d3959941c4721a4 (patch)
tree87af793cbf504c8f7ff9174d8707bc6b87672f47 /arch/powerpc
parent884d04cd8d7bba3dc885227ad400f8aea5623cdc (diff)
[POWERPC] Xilinx: boot support for Xilinx uart 16550.
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@xilinx.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/boot/ns16550.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/boot/ns16550.c b/arch/powerpc/boot/ns16550.c
index aef3bdc89160..8c9ead94be06 100644
--- a/arch/powerpc/boot/ns16550.c
+++ b/arch/powerpc/boot/ns16550.c
@@ -55,10 +55,15 @@ static u8 ns16550_tstc(void)
55int ns16550_console_init(void *devp, struct serial_console_data *scdp) 55int ns16550_console_init(void *devp, struct serial_console_data *scdp)
56{ 56{
57 int n; 57 int n;
58 u32 reg_offset;
58 59
59 if (dt_get_virtual_reg(devp, (void **)&reg_base, 1) < 1) 60 if (dt_get_virtual_reg(devp, (void **)&reg_base, 1) < 1)
60 return -1; 61 return -1;
61 62
63 n = getprop(devp, "reg-offset", &reg_offset, sizeof(reg_offset));
64 if (n == sizeof(reg_offset))
65 reg_base += reg_offset;
66
62 n = getprop(devp, "reg-shift", &reg_shift, sizeof(reg_shift)); 67 n = getprop(devp, "reg-shift", &reg_shift, sizeof(reg_shift));
63 if (n != sizeof(reg_shift)) 68 if (n != sizeof(reg_shift))
64 reg_shift = 0; 69 reg_shift = 0;