Commit a34cd466 authored by Jean-Francois Moine's avatar Jean-Francois Moine Committed by Mike Turquette
Browse files

clk: return probe defer when DT clock not yet ready 



At probe time, a clock device may not be ready when some other device
wants to use it.

This patch lets the functions clk_get/devm_clk_get return a probe defer
when the clock is defined in the DT but not yet available.

Signed-off-by: default avatarJean-Francois Moine <moinejf@free.fr>
Reviewed-by: default avatarSylwester Nawrocki <s.nawrocki@samsung.com>
Tested-by: default avatarSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: default avatarMike Turquette <mturquette@linaro.org>
parent 86bcfa2e

drivers/clk/clk.c

+1 −1
Original line number Diff line number Diff line
@@ -2466,7 +2466,7 @@ EXPORT_SYMBOL_GPL(of_clk_del_provider); 
struct clk *__of_clk_get_from_provider(struct of_phandle_args *clkspec)

{

	struct of_clk_provider *provider;

	struct clk *clk = ERR_PTR(-ENOENT);

	struct clk *clk = ERR_PTR(-EPROBE_DEFER);



	/* Check if we have such a provider in our array */

	list_for_each_entry(provider, &of_clk_providers, link) {

drivers/clk/clkdev.c

+2 −0
Original line number Diff line number Diff line
@@ -167,6 +167,8 @@ struct clk *clk_get(struct device *dev, const char *con_id) 
		clk = of_clk_get_by_name(dev->of_node, con_id);

		if (!IS_ERR(clk))

			return clk;

		if (PTR_ERR(clk) == -EPROBE_DEFER)

			return clk;

	}



	return clk_get_sys(dev_id, con_id);

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