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author | Stephen Boyd <sboyd@codeaurora.org> | 2016-02-08 14:59:49 -0800 |
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committer | Stephen Boyd <sboyd@codeaurora.org> | 2016-04-19 16:54:26 -0700 |
commit | e4f1b49bda6d6aa2e13730ff7eeccbe65a6271f1 (patch) | |
tree | d7eb11b59df9e482e1cfd0d946e35ad278a8cbf0 /drivers/clk/clkdev.c | |
parent | 0861e5b8cf80038e91942f1005c8dfce79d18c38 (diff) | |
download | linux-e4f1b49bda6d6aa2e13730ff7eeccbe65a6271f1.tar.gz linux-e4f1b49bda6d6aa2e13730ff7eeccbe65a6271f1.tar.bz2 linux-e4f1b49bda6d6aa2e13730ff7eeccbe65a6271f1.zip |
clkdev: Add clk_hw based registration APIs
Now that we have a clk registration API that doesn't return
struct clks, we need to have some way to hand out struct clks via
the clk_get() APIs that doesn't involve associating struct clk
pointers with a struct clk_lookup. Luckily, clkdev already
operates on struct clk_hw pointers, except for the registration
facing APIs where it converts struct clk pointers into struct
clk_hw pointers almost immediately.
Let's add clk_hw based registration APIs so that we can skip the
conversion step and provide a way for clk provider drivers to
operate exclusively on clk_hw structs. This way we clearly
split the API between consumers and providers.
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers/clk/clkdev.c')
-rw-r--r-- | drivers/clk/clkdev.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c index ae8e40a82d34..89cc700fbc37 100644 --- a/drivers/clk/clkdev.c +++ b/drivers/clk/clkdev.c @@ -301,6 +301,20 @@ clkdev_alloc(struct clk *clk, const char *con_id, const char *dev_fmt, ...) } EXPORT_SYMBOL(clkdev_alloc); +struct clk_lookup * +clkdev_hw_alloc(struct clk_hw *hw, const char *con_id, const char *dev_fmt, ...) +{ + struct clk_lookup *cl; + va_list ap; + + va_start(ap, dev_fmt); + cl = vclkdev_alloc(hw, con_id, dev_fmt, ap); + va_end(ap); + + return cl; +} +EXPORT_SYMBOL(clkdev_hw_alloc); + /** * clkdev_create - allocate and add a clkdev lookup structure * @clk: struct clk to associate with all clk_lookups @@ -324,6 +338,29 @@ struct clk_lookup *clkdev_create(struct clk *clk, const char *con_id, } EXPORT_SYMBOL_GPL(clkdev_create); +/** + * clkdev_hw_create - allocate and add a clkdev lookup structure + * @hw: struct clk_hw to associate with all clk_lookups + * @con_id: connection ID string on device + * @dev_fmt: format string describing device name + * + * Returns a clk_lookup structure, which can be later unregistered and + * freed. + */ +struct clk_lookup *clkdev_hw_create(struct clk_hw *hw, const char *con_id, + const char *dev_fmt, ...) +{ + struct clk_lookup *cl; + va_list ap; + + va_start(ap, dev_fmt); + cl = vclkdev_create(hw, con_id, dev_fmt, ap); + va_end(ap); + + return cl; +} +EXPORT_SYMBOL_GPL(clkdev_hw_create); + int clk_add_alias(const char *alias, const char *alias_dev_name, const char *con_id, struct device *dev) { @@ -402,3 +439,30 @@ int clk_register_clkdev(struct clk *clk, const char *con_id, return cl ? 0 : -ENOMEM; } EXPORT_SYMBOL(clk_register_clkdev); + +/** + * clk_hw_register_clkdev - register one clock lookup for a struct clk_hw + * @hw: struct clk_hw to associate with all clk_lookups + * @con_id: connection ID string on device + * @dev_id: format string describing device name + * + * con_id or dev_id may be NULL as a wildcard, just as in the rest of + * clkdev. + */ +int clk_hw_register_clkdev(struct clk_hw *hw, const char *con_id, + const char *dev_id) +{ + struct clk_lookup *cl; + + /* + * Since dev_id can be NULL, and NULL is handled specially, we must + * pass it as either a NULL format string, or with "%s". + */ + if (dev_id) + cl = __clk_register_clkdev(hw, con_id, "%s", dev_id); + else + cl = __clk_register_clkdev(hw, con_id, NULL); + + return cl ? 0 : -ENOMEM; +} +EXPORT_SYMBOL(clk_hw_register_clkdev); |