diff options
Diffstat (limited to 'drivers/clk/clk-uclass.c')
| -rw-r--r-- | drivers/clk/clk-uclass.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c index 53e7be764d3..3d2344f009e 100644 --- a/drivers/clk/clk-uclass.c +++ b/drivers/clk/clk-uclass.c @@ -241,6 +241,15 @@ static int clk_set_default_parents(struct udevice *dev, int stage) ret = clk_get_by_indexed_prop(dev, "assigned-clocks", index, &clk); + /* + * If the clock provider is not ready yet, let it handle + * the re-programming later. + */ + if (ret == -EPROBE_DEFER) { + ret = 0; + continue; + } + if (ret) { debug("%s: could not get assigned clock %d for %s\n", __func__, index, dev_read_name(dev)); @@ -309,6 +318,15 @@ static int clk_set_default_rates(struct udevice *dev, int stage) ret = clk_get_by_indexed_prop(dev, "assigned-clocks", index, &clk); + /* + * If the clock provider is not ready yet, let it handle + * the re-programming later. + */ + if (ret == -EPROBE_DEFER) { + ret = 0; + continue; + } + if (ret) { dev_dbg(dev, "could not get assigned clock %d (err = %d)\n", @@ -502,6 +520,8 @@ struct clk *clk_get_parent(struct clk *clk) return NULL; pdev = dev_get_parent(clk->dev); + if (!pdev) + return ERR_PTR(-ENODEV); pclk = dev_get_clk_ptr(pdev); if (!pclk) return ERR_PTR(-ENODEV); @@ -548,6 +568,22 @@ ulong clk_round_rate(struct clk *clk, ulong rate) return ops->round_rate(clk, rate); } +static void clk_clean_rate_cache(struct clk *clk) +{ + struct udevice *child_dev; + struct clk *clkp; + + if (!clk) + return; + + clk->rate = 0; + + list_for_each_entry(child_dev, &clk->dev->child_head, sibling_node) { + clkp = dev_get_clk_ptr(child_dev); + clk_clean_rate_cache(clkp); + } +} + ulong clk_set_rate(struct clk *clk, ulong rate) { const struct clk_ops *ops; @@ -560,6 +596,9 @@ ulong clk_set_rate(struct clk *clk, ulong rate) if (!ops->set_rate) return -ENOSYS; + /* Clean up cached rates for us and all child clocks */ + clk_clean_rate_cache(clk); + return ops->set_rate(clk, rate); } |