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clk: add accuracy support for fixed clock

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This patch adds support for accuracy retrieval on fixed clocks.
It also adds a new dt property called 'clock-accuracy' to define the clock
accuracy.

This can be usefull for oscillator (RC, crystal, ...) definitions which are
always given an accuracy characteristic.

Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Boris BREZILLON
2013-12-21 10:34:48 +01:00
committed by Mike Turquette
parent 5279fc402a
commit 0903ea6017
3 changed files with 44 additions and 6 deletions
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4
include/linux/clk-provider.h
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@@ -204,6 +204,7 @@ struct clk_hw {
struct clk_fixed_rate {
struct clk_hw hw;
unsigned long fixed_rate;
unsigned long fixed_accuracy;
u8 flags;
};
@@ -211,6 +212,9 @@ extern const struct clk_ops clk_fixed_rate_ops;
struct clk *clk_register_fixed_rate(struct device *dev, const char *name,
const char *parent_name, unsigned long flags,
unsigned long fixed_rate);
struct clk *clk_register_fixed_rate_with_accuracy(struct device *dev,
const char *name, const char *parent_name, unsigned long flags,
unsigned long fixed_rate, unsigned long fixed_accuracy);
void of_fixed_clk_setup(struct device_node *np);