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| author | Neil Armstrong <narmstrong@baylibre.com> | 2018-07-26 15:19:32 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2018-08-04 14:50:10 -0400 |
| commit | d64caaf77dec2f0a576d0d1f7c7f4f463ebc7de8 (patch) | |
| tree | 7a7a23bc336119b5ffbc72b10df68d75a5ec36c8 /drivers/clk/clk-uclass.c | |
| parent | 314d3acd4d9f4e606f0c8c6b0bdbbe24be8d55d6 (diff) | |
| download | u-boot-d64caaf77dec2f0a576d0d1f7c7f4f463ebc7de8.tar.gz u-boot-d64caaf77dec2f0a576d0d1f7c7f4f463ebc7de8.tar.bz2 u-boot-d64caaf77dec2f0a576d0d1f7c7f4f463ebc7de8.zip | |
clk: clk_set_default: accept no-op skip fields
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/bindings/clock/clock-bindings.txt#L135
Fixes: f4fcba5c5baa "clk: implement clk_set_defaults()"
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/clk/clk-uclass.c')
| -rw-r--r-- | drivers/clk/clk-uclass.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c index 419d4515ac..2b15978e14 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) { |