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ppc4xx: Only fixup opb attached UARTs

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This patch updates the fdt UART clock fixup code to
only touch CPU internal UARTs on 4xx systems.
Only these UARTs are definitely clocked by gd->uart_clk.

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Matthias Fuchs 2009-02-03 22:13:16 +01:00 committed by Stefan Roese
parent 9d8811c5bd
commit b129eff5ed
1 changed files with 22 additions and 2 deletions
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24
cpu/ppc4xx/fdt.c
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@ -113,6 +113,7 @@ void fdt_pcie_setup(void *blob)
void ft_cpu_setup(void *blob, bd_t *bd)
{
sys_info_t sys_info;
int off, ndepth = 0;
get_sys_info(&sys_info);
@ -133,9 +134,28 @@ void ft_cpu_setup(void *blob, bd_t *bd)
fdt_fixup_memory(blob, (u64)bd->bi_memstart, (u64)bd->bi_memsize);
/*
* Setup all baudrates for the UARTs
* Fixup all UART clocks for CPU internal UARTs
* (only these UARTs are definitely clocked by gd->uart_clk)
*
* These UARTs are direct childs of /plb/opb. This code
* does not touch any UARTs that are connected to the ebc.
*/
do_fixup_by_compat_u32(blob, "ns16550", "clock-frequency", gd->uart_clk, 1);
off = fdt_path_offset(blob, "/plb/opb");
while ((off = fdt_next_node(blob, off, &ndepth)) >= 0) {
/*
* process all sub nodes and stop when we are back
* at the starting depth
*/
if (ndepth <= 0)
break;
/* only update direct childs */
if ((ndepth == 1) &&
(fdt_node_check_compatible(blob, off, "ns16550") == 0))
fdt_setprop(blob, off,
"clock-frequency",
(void*)&(gd->uart_clk), 4);
}
/*
* Fixup all ethernet nodes