diff options
Diffstat (limited to 'target/linux/ipq806x/patches/0163-clk-return-probe-defer-when-DT-clock-not-yet-ready.patch')
| -rw-r--r-- | target/linux/ipq806x/patches/0163-clk-return-probe-defer-when-DT-clock-not-yet-ready.patch | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches/0163-clk-return-probe-defer-when-DT-clock-not-yet-ready.patch b/target/linux/ipq806x/patches/0163-clk-return-probe-defer-when-DT-clock-not-yet-ready.patch new file mode 100644 index 0000000000..7ea69f331b --- /dev/null +++ b/target/linux/ipq806x/patches/0163-clk-return-probe-defer-when-DT-clock-not-yet-ready.patch @@ -0,0 +1,49 @@ +From 1ce8667062bc7b8813adf6103ad2374d9dd52fb0 Mon Sep 17 00:00:00 2001 +From: Jean-Francois Moine <moinejf@free.fr> +Date: Mon, 25 Nov 2013 19:47:04 +0100 +Subject: [PATCH 163/182] 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: Jean-Francois Moine <moinejf@free.fr> +Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com> +Tested-by: Sylwester Nawrocki <s.nawrocki@samsung.com> +Signed-off-by: Mike Turquette <mturquette@linaro.org> +--- + drivers/clk/clk.c | 2 +- + drivers/clk/clkdev.c | 2 ++ + 2 files changed, 3 insertions(+), 1 deletion(-) + +diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c +index 0582068..a3facad 100644 +--- a/drivers/clk/clk.c ++++ b/drivers/clk/clk.c +@@ -2502,7 +2502,7 @@ 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) { +diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c +index 48f6721..a360b2e 100644 +--- a/drivers/clk/clkdev.c ++++ b/drivers/clk/clkdev.c +@@ -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); +-- +1.7.10.4 + |