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.fu...@esd-electronics.com>
---
cpu/ppc4xx/fdt.c | 24 ++++++++++++++++++++++--
1 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/cpu/ppc4xx/fdt.c b/cpu/ppc4xx/fdt.c
index c55e1cf..ba5c120 100644
--- a/cpu/ppc4xx/fdt.c
+++ b/cpu/ppc4xx/fdt.c
@@ -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
--
1.5.6.3
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