diff options
author | Ulf Hansson <ulf.hansson@linaro.org> | 2013-03-12 19:26:02 (GMT) |
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committer | Mike Turquette <mturquette@linaro.org> | 2013-03-19 19:58:42 (GMT) |
commit | 3d6ee287a3e341c88eafd0b4620b12d640b3736b (patch) | |
tree | c5361658171613baf2437e14ac27563a43241bd3 /drivers/clk | |
parent | 30ee400614385ac49f4c9b4bc03d77ff8f07a61e (diff) | |
download | linux-fsl-qoriq-3d6ee287a3e341c88eafd0b4620b12d640b3736b.tar.xz |
clk: Introduce optional is_prepared callback
To reflect whether a clk_hw is prepared the clk_hw may implement
the optional is_prepared callback. If not implemented we fall back
to use the software prepare counter.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Diffstat (limited to 'drivers/clk')
-rw-r--r-- | drivers/clk/clk.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index ed87b24..7571b50 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -451,6 +451,27 @@ unsigned long __clk_get_flags(struct clk *clk) return !clk ? 0 : clk->flags; } +bool __clk_is_prepared(struct clk *clk) +{ + int ret; + + if (!clk) + return false; + + /* + * .is_prepared is optional for clocks that can prepare + * fall back to software usage counter if it is missing + */ + if (!clk->ops->is_prepared) { + ret = clk->prepare_count ? 1 : 0; + goto out; + } + + ret = clk->ops->is_prepared(clk->hw); +out: + return !!ret; +} + bool __clk_is_enabled(struct clk *clk) { int ret; |