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[POWERPC] bootwrapper: Add dt_xlate_reg(), and use it to find serial registers.

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dt_xlate_reg() uses the ranges properties of a node's parentage to find
the absolute physical address of the node's registers.

The ns16550 driver uses this when no virtual-reg property is found.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Scott Wood
2007-03-26 15:52:24 -05:00
committed by Paul Mackerras
parent dbf8eefa2b
commit 6e1af384f1
3 changed files with 187 additions and 2 deletions
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9
arch/powerpc/boot/ns16550.c
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@ -55,10 +55,15 @@ static u8 ns16550_tstc(void)
int ns16550_console_init(void *devp, struct serial_console_data *scdp)
{
int n;
unsigned long reg_phys;
n = getprop(devp, "virtual-reg", &reg_base, sizeof(reg_base));
if (n != sizeof(reg_base))
return -1;
if (n != sizeof(reg_base)) {
if (!dt_xlate_reg(devp, 0, &reg_phys, NULL))
return -1;
reg_base = (void *)reg_phys;
}
n = getprop(devp, "reg-shift", &reg_shift, sizeof(reg_shift));
if (n != sizeof(reg_shift))