u-boot.git/include/clk.h, branch v2020.07

clk: Fix clk func names in comments

2020-05-10T20:00:49+00:00

clk function names in comments should be prefix with
clk instead of clock.

Fix it.

Cc: Simon Glass 
Cc: Tom Rini 
Signed-off-by: Jagan Teki 
Reviewed-by: Simon Glass

dm: clk: add stub when CONFIG_CLK is deactivated

2020-04-28T11:52:52+00:00

Add stub for functions clk_...() when CONFIG_CLK is deactivated.

This patch avoids compilation issues for driver using these API
without protection (#if CONFIG_IS_ENABLED(CLK))

For example, before this patch we have undefined reference to
`clk_disable_bulk') for code:
  clk_disable_bulk(&priv->clks);
  clk_release_bulk(&priv->clks);

Signed-off-by: Patrick Delaunay

clk: add APIs to get (optional) clock by name without a device

2020-01-16T14:39:45+00:00

Sometimes we may need get (optional) clock without a device,
that means use ofnode.
e.g. when the phy node has subnode, and there is no device created
for subnode, in this case, we need these new APIs to get subnode's
clock.

Signed-off-by: Chunfeng Yun 
Reviewed-by: Simon Glass 
Reviewed-by: Ryder Lee

drivers: clk: Fix using assigned-clocks in the node of the clock it sets up

2019-10-22T14:14:05+00:00

This fixes the case where assigned-clocks is used to define a clock
defaults inside this same clock's node. This is used sometimes to setup a
default parents and/or rate for a clock.

example:
muxed_clock: muxed_clock {
	clocks = <&clk_provider 0>, <&clk_provider 1>;
	#clock-cells = <0>;
	assigned-clocks = <&muxed_clock>;
	assigned-clock-parents = <&clk_provider 1>;
};

It doesn't work in u-boot because the assigned-clocks are setup *before*
the clock is probed. (clk_set_parent() will likely crash or fail if called
before the device probe function)
Making it work by handling "assigned-clocks" in 2 steps: first before the
clk device is probed, and then after the clk device is probed.

Signed-off-by: Jean-Jacques Hiblot

drivers: clk: Add a managed API to get clocks from the device-tree

2019-10-22T14:14:05+00:00

Add devm_clk_get(), devm_clk_get_optional() to get clocks from the
device-tree. The clocks is automatically released and the data structure
freed when the device is unbound.
Also add devm_clk_put() to release the clock and free the data structure
manually.

Signed-off-by: Jean-Jacques Hiblot

drivers: clk: Handle gracefully NULL pointers

2019-10-22T14:14:05+00:00

Prepare the way for a managed CLK API by handling NULL pointers without
crashing nor failing.

Signed-off-by: Jean-Jacques Hiblot

clk: introduce enable_count

2019-08-21T22:10:09+00:00

As what Linux Kernel 5.3.0 provides when enable/disable clk,
there is an enable_count in clk_core_disable/enable. Introduce
enable_count to track the clk enable/disable count when
clk_enable/disable for CCF. And Initialize enable_count to 0 when
register the clk.

And clk tree dump with enable_count will be supported, it will
be easy for us to check the clk status with enable_count

Signed-off-by: Peng Fan

clk: add support for clk_is_match()

2019-08-12T17:33:38+00:00

Add support for clk_is_match() which is required to
know if two clock pointers point to the same exact
physical clock.

Also add a unit test for the new API.

Reviewed-by: Lokesh Vutla 
Signed-off-by: Sekhar Nori

clk: introduce clk_dev_binded

2019-07-31T07:20:51+00:00

When support Clock Common Framework, U-Boot use dev for
clk tree information, there is no clk->parent. When
support composite clk, it contains mux/gate/divider,
but the mux/gate/divider is not binded with device.
So we could not use dev_get_uclass_priv to get the correct
clk_mux/gate/divider. So add clk_dev_binded to let
choose the correct method.

Signed-off-by: Peng Fan

dm: clk: Define clk_get_by_id() for clk operations

2019-07-19T12:50:30+00:00

This commit adds the clk_get_by_id() function, which is responsible
for getting the udevice with matching clk->id. Such approach allows
re-usage of inherit DM list relationship for the same class (UCLASS_CLK).
As a result - we don't need any other external list - it is just enough
to look for UCLASS_CLK related udevices.

Signed-off-by: Lukasz Majewski 
Reviewed-by: Peng Fan