The Assigned Clock parents and rates misses the fact that a "0" entry can be passed to skip setting a parent or rate of an assigned clock as described in the Linux clock bindings at [1].

This patch simply skips the clock reparenting if the DT parsing returns -ENOENT and the clock rate setting if "0" is passed as clock rate.

[1] https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindi...

Fixes: f4fcba5c5baa "clk: implement clk_set_defaults()" Signed-off-by: Neil Armstrong narmstrong@baylibre.com --- drivers/clk/clk-uclass.c | 8 ++++++++ 1 file changed, 8 insertions(+)

diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c index 419d451..2b15978 100644 --- a/drivers/clk/clk-uclass.c +++ b/drivers/clk/clk-uclass.c @@ -154,6 +154,10 @@ static int clk_set_default_parents(struct udevice *dev) for (index = 0; index < num_parents; index++) { ret = clk_get_by_indexed_prop(dev, "assigned-clock-parents", index, &parent_clk); + /* If -ENOENT, this is a no-op entry */ + if (ret == -ENOENT) + continue; + if (ret) { debug("%s: could not get parent clock %d for %s\n", __func__, index, dev_read_name(dev)); @@ -210,6 +214,10 @@ static int clk_set_default_rates(struct udevice *dev) goto fail;

for (index = 0; index < num_rates; index++) { + /* If 0 is passed, this is a no-op */ + if (!rates[index]) + continue; + ret = clk_get_by_indexed_prop(dev, "assigned-clocks", index, &clk); if (ret) {