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| author | Stephen Boyd <sboyd@codeaurora.org> | 2015-07-16 12:50:27 -0700 |
|---|---|---|
| committer | Stephen Boyd <sboyd@codeaurora.org> | 2015-07-28 11:58:50 -0700 |
| commit | 9783c0d98501aa146ff467916ab4b8830a655d7c (patch) | |
| tree | f484737cf90feb9093d15c82c2f6e5e432d14730 /drivers | |
| parent | 5c757456c16ce056a40a120e63235bc00c94ee7f (diff) | |
| download | linux-stable-9783c0d98501aa146ff467916ab4b8830a655d7c.tar.gz linux-stable-9783c0d98501aa146ff467916ab4b8830a655d7c.tar.bz2 linux-stable-9783c0d98501aa146ff467916ab4b8830a655d7c.zip | |
clk: Allow providers to configure min/max rates
clk providers are using the consumer APIs to set min/max rates on
the clock they're providing. To encourage clk providers to move
away from the consumer APIs, add a provider API to set the
min/max rate of a clock. The assumption is that this is done
before the clock can be requested via clk_get() and that the
clock rate is already within the boundaries of the min/max that's
configured.
Tested-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/clk/clk.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index bd6dfbe04cf0..1ac237fe2fdb 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -58,6 +58,8 @@ struct clk_core { unsigned long flags; unsigned int enable_count; unsigned int prepare_count; + unsigned long min_rate; + unsigned long max_rate; unsigned long accuracy; int phase; struct hlist_head children; @@ -512,8 +514,8 @@ static void clk_core_get_boundaries(struct clk_core *core, { struct clk *clk_user; - *min_rate = 0; - *max_rate = ULONG_MAX; + *min_rate = core->min_rate; + *max_rate = core->max_rate; hlist_for_each_entry(clk_user, &core->clks, clks_node) *min_rate = max(*min_rate, clk_user->min_rate); @@ -522,6 +524,14 @@ static void clk_core_get_boundaries(struct clk_core *core, *max_rate = min(*max_rate, clk_user->max_rate); } +void clk_hw_set_rate_range(struct clk_hw *hw, unsigned long min_rate, + unsigned long max_rate) +{ + hw->core->min_rate = min_rate; + hw->core->max_rate = max_rate; +} +EXPORT_SYMBOL_GPL(clk_hw_set_rate_range); + /* * Helper for finding best parent to provide a given frequency. This can be used * directly as a determine_rate callback (e.g. for a mux), or from a more @@ -2498,6 +2508,8 @@ struct clk *clk_register(struct device *dev, struct clk_hw *hw) core->hw = hw; core->flags = hw->init->flags; core->num_parents = hw->init->num_parents; + core->min_rate = 0; + core->max_rate = ULONG_MAX; hw->core = core; /* allocate local copy in case parent_names is __initdata */ |