From df2373ca941741f3f66750241a048ad4e2ff2c91 Mon Sep 17 00:00:00 2001 From: Zhao Qiang Date: Thu, 24 Nov 2016 11:47:45 +0800 Subject: [PATCH 236/238] clk: add API of clks Signed-off-by: Zhao Qiang --- drivers/clk/clk.c | 19 +++++++++++++++++++ include/linux/clk-provider.h | 1 + include/linux/clk.h | 9 +++++++++ 3 files changed, 29 insertions(+) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index f13c3f4..0f6bcf5 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -359,6 +359,19 @@ static struct clk_core *clk_core_get_parent_by_index(struct clk_core *core, return core->parents[index]; } +struct clk *clk_get_parent_by_index(struct clk *clk, u8 index) +{ + struct clk_core *parent; + + if (!clk) + return NULL; + + parent = clk_core_get_parent_by_index(clk->core, index); + + return !parent ? NULL : parent->hw->clk; +} +EXPORT_SYMBOL_GPL(clk_get_parent_by_index); + struct clk_hw * clk_hw_get_parent_by_index(const struct clk_hw *hw, unsigned int index) { @@ -2033,6 +2046,12 @@ static const struct file_operations clk_summary_fops = { .release = single_release, }; +unsigned int clk_get_num_parents(struct clk *clk) +{ + return !clk ? 0 : clk->core->num_parents; +} +EXPORT_SYMBOL_GPL(clk_get_num_parents); + static void clk_dump_one(struct seq_file *s, struct clk_core *c, int level) { if (!c) diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 7cd0171..77dfd61 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -650,6 +650,7 @@ unsigned int clk_hw_get_num_parents(const struct clk_hw *hw); struct clk_hw *clk_hw_get_parent(const struct clk_hw *hw); struct clk_hw *clk_hw_get_parent_by_index(const struct clk_hw *hw, unsigned int index); +struct clk *clk_get_parent_by_index(struct clk *clk, u8 index); unsigned int __clk_get_enable_count(struct clk *clk); unsigned long clk_hw_get_rate(const struct clk_hw *hw); unsigned long __clk_get_flags(struct clk *clk); diff --git a/include/linux/clk.h b/include/linux/clk.h index 0df4a51..1df90e3 100644 --- a/include/linux/clk.h +++ b/include/linux/clk.h @@ -392,6 +392,15 @@ int clk_set_parent(struct clk *clk, struct clk *parent); struct clk *clk_get_parent(struct clk *clk); /** + * clk_get_num_parents - get number of possible parents + * @clk: clock source + * + * Returns the number of possible parents of this clock, + * which can then be enumerated using clk_get_parent_by_index(). + */ +unsigned int clk_get_num_parents(struct clk *clk); + +/** * clk_get_sys - get a clock based upon the device name * @dev_id: device name * @con_id: connection ID -- 1.7.9.5