linux-toradex.git/include/linux/clk-provider.h, branch v4.1.20

clk: clk-gpio-gate: Fix active low

2015-04-11T00:45:30+00:00

The active low flag in the DT cell is currently ignored.

This occurs because of_get_named_gpio_flags() does not apply the flags
to the underlying struct gpio_desc so the test in clk_register_gpio_gate()
was bogus.

Note that this patch changes the internal kernel API for
clk_register_gpio_gate() but there are currently no other users.

Signed-off-by: Martin Fuzzey 
Acked-by: Jyri Sarha 
Signed-off-by: Michael Turquette

clk: Add __clk_hw_set_clk helper function

2015-02-18T17:40:07+00:00

After the clk API change to return a per-user clock instance, both the
struct clk_core and struct clk pointers from the hw clock needs to be
assigned to clock that share the same state.

In the future the struct clk_core will be removed and this is going to
change again so to avoid having to change the assignments twice in all
the drivers, add a helper function to have an indirection level.

Signed-off-by: Javier Martinez Canillas 
Reviewed-by: Stephen Boyd 
Signed-off-by: Michael Turquette

clk: Add rate constraints to clocks

2015-02-02T22:23:42+00:00

Adds a way for clock consumers to set maximum and minimum rates. This
can be used for thermal drivers to set minimum rates, or by misc.
drivers to set maximum rates to assure a minimum performance level.

Changes the signature of the determine_rate callback by adding the
parameters min_rate and max_rate.

Signed-off-by: Tomeu Vizoso 
Signed-off-by: Stephen Boyd 
[sboyd@codeaurora.org: set req_rate in __clk_init]
Signed-off-by: Michael Turquette 
[mturquette@linaro.org: min/max rate for sun6i_ahb1_clk_determine_rate
                        migrated clk-private.h changes to clk.c]

clk: Make clk API return per-user struct clk instances

2015-02-02T22:22:19+00:00

Moves clock state to struct clk_core, but takes care to change as little API as
possible.

struct clk_hw still has a pointer to a struct clk, which is the
implementation's per-user clk instance, for backwards compatibility.

The struct clk that clk_get_parent() returns isn't owned by the caller, but by
the clock implementation, so the former shouldn't call clk_put() on it.

Because some boards in mach-omap2 still register clocks statically, their clock
registration had to be updated to take into account that the clock information
is stored in struct clk_core now.

Signed-off-by: Tomeu Vizoso 
Reviewed-by: Stephen Boyd 
Tested-by: Tony Lindgren 
Signed-off-by: Michael Turquette 
[mturquette@linaro.org: adapted clk_has_parent to struct clk_core
                        applied OMAP3+ DPLL fix from Tero & Tony]

clk: divider: Make generic for usage elsewhere

2015-01-27T19:48:52+00:00

Some devices don't use mmio to interact with dividers. Split out the
logic from the register read/write parts so that we can reuse the
division logic elsewhere.

Signed-off-by: Stephen Boyd 
Tested-by: Kenneth Westfield 
Signed-off-by: Michael Turquette

clk: Add __clk_mux_determine_rate_closest

2015-01-27T19:48:39+00:00

Some clock drivers want to find the closest rate on the input of
a mux instead of a rate that's less than or equal to the desired
rate. Add a generic mux function to support this.

Signed-off-by: Stephen Boyd 
Tested-by: Kenneth Westfield 
Signed-off-by: Michael Turquette

clk: Add clk_unregister_{divider, gate, mux} to close memory leak

2015-01-17T21:52:41+00:00

The common clk_register_{divider,gate,mux} functions allocated memory
for internal data which wasn't freed anywhere. Drivers using these
helpers could only unregister clocks but the memory would still leak.

Add corresponding unregister functions which will release all resources.

Signed-off-by: Krzysztof Kozlowski 
Reviewed-by: Stephen Boyd 
Signed-off-by: Michael Turquette

clk: Change clk_ops->determine_rate to return a clk_hw as the best parent

2014-12-04T00:21:37+00:00

This is in preparation for clock providers to not have to deal with struct clk.

Signed-off-by: Tomeu Vizoso 
Reviewed-by: Stephen Boyd 
Signed-off-by: Michael Turquette

clk: change clk_debugfs_add_file to take a struct clk_hw

2014-12-03T23:15:35+00:00

Instead of struct clk, as this should be only used by providers.

Signed-off-by: Tomeu Vizoso 
Reviewed-by: Stephen Boyd 
Signed-off-by: Michael Turquette

clk: Don't expose __clk_get_accuracy

2014-12-03T23:15:34+00:00

As it's only used internally, in drivers/clk/clk.c.

Signed-off-by: Tomeu Vizoso 
Reviewed-by: Stephen Boyd 
Signed-off-by: Michael Turquette