Messages in this thread Patch in this message | | | Subject | [PATCH 2/2] clk: Generic support for fixed-rate clocks | From | Jeremy Kerr <> | Date | Mon, 12 Jul 2010 10:37:25 +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>
--- include/linux/clk.h | 13 +++++++++++++ kernel/clk.c | 14 ++++++++++++++ 2 files changed, 27 insertions(+)
diff --git a/include/linux/clk.h b/include/linux/clk.h index a95cc82..85e1d44 100644 --- a/include/linux/clk.h +++ b/include/linux/clk.h @@ -90,6 +90,19 @@ static inline void clk_common_init(struct clk *clk) clk->enable_count = 0; } +/* Simple fixed-rate clock */ +struct clk_fixed { + struct clk clk; + unsigned long rate; +}; + +extern struct clk_ops clk_fixed_ops; + +#define INIT_CLK_FIXED(r) { \ + .clk = INIT_CLK(clk_fixed_ops), \ + .rate = (r) \ +} + #else /* !CONFIG_USE_COMMON_STRUCT_CLK */ /* diff --git a/kernel/clk.c b/kernel/clk.c index cdea25f..32f25ef 100644 --- a/kernel/clk.c +++ b/kernel/clk.c @@ -99,3 +99,17 @@ struct clk *clk_get_parent(struct clk *clk) return ERR_PTR(-ENOSYS); } EXPORT_SYMBOL_GPL(clk_get_parent); + +/* 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);
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