| Subject | [PATCH 2/2] clk: Generic support for fixed-rate clocks | From | Jeremy Kerr <> | Date | Thu, 03 Mar 2011 14:40:29 +0800 |
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Since most platforms will need a fixed-rate clock, add one. This will also serve as a basic example of an implementation of struct clk.
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
--- drivers/clk/clk.c | 14 ++++++++++++++ include/linux/clk.h | 16 ++++++++++++++++ 2 files changed, 30 insertions(+)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 0bc9c6f..0da0bb9 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -130,3 +130,17 @@ void __clk_put(struct clk *clk) if (clk->ops->put) clk->ops->put(clk); } + +/* clk_fixed support */ + +#define to_clk_fixed(clk) (container_of(clk, struct clk_fixed, clk)) + +static unsigned long clk_fixed_get_rate(struct clk *clk) +{ + return to_clk_fixed(clk)->rate; +} + +struct clk_ops clk_fixed_ops = { + .get_rate = clk_fixed_get_rate, +}; +EXPORT_SYMBOL_GPL(clk_fixed_ops); diff --git a/include/linux/clk.h b/include/linux/clk.h index 7b406bd..d2f0db0 100644 --- a/include/linux/clk.h +++ b/include/linux/clk.h @@ -155,6 +155,22 @@ static inline void clk_common_init(struct clk *clk) mutex_init(&clk->prepare_lock); } +/* Simple fixed-rate clock */ +struct clk_fixed { + struct clk clk; + unsigned long rate; +}; + +extern struct clk_ops clk_fixed_ops; + +#define INIT_CLK_FIXED(name, r) { \ + .clk = INIT_CLK(name.clk, clk_fixed_ops), \ + .rate = (r) \ +} + +#define DEFINE_CLK_FIXED(name, r) \ + struct clk_fixed name = INIT_CLK_FIXED(name, r) + #else /* !CONFIG_USE_COMMON_STRUCT_CLK */ /*
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