mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 05:04:00 +08:00
5974b794cb
Palmas class of devices can provide 32K clock(s) to be used by other devices on the board. Depending on the actual device the provided clocks can be: CLK32K_KG and CLK32K_KGAUDIO or only one: CLK32K_KG (TPS659039 for example) Use separate compatible flags for the two 32K clock. A system which needs or have only one of the 32k clock from Palmas will need to add node(s) for each clock as separate section in the dts file. The two compatible property is: "ti,palmas-clk32kg" for clk32kg clock "ti,palmas-clk32kgaudio" for clk32kgaudio clock Apart from the register control of the clocks - which is done via the clock API there is a posibility to enable the external sleep control. In this way the clock can be enabled/disabled on demand by the user of the clock. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Reviewed-by: Nishanth Menon <nm@ti.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
36 lines
1.1 KiB
Plaintext
36 lines
1.1 KiB
Plaintext
* Palmas 32KHz clocks *
|
|
|
|
Palmas device has two clock output pins for 32KHz, KG and KG_AUDIO.
|
|
|
|
This binding uses the common clock binding ./clock-bindings.txt.
|
|
|
|
Required properties:
|
|
- compatible : "ti,palmas-clk32kg" for clk32kg clock
|
|
"ti,palmas-clk32kgaudio" for clk32kgaudio clock
|
|
- #clock-cells : shall be set to 0.
|
|
|
|
Optional property:
|
|
- ti,external-sleep-control: The external enable input pins controlled the
|
|
enable/disable of clocks. The external enable input pins ENABLE1,
|
|
ENABLE2 and NSLEEP. The valid values for the external pins are:
|
|
PALMAS_EXT_CONTROL_PIN_ENABLE1 for ENABLE1 pin
|
|
PALMAS_EXT_CONTROL_PIN_ENABLE2 for ENABLE2 pin
|
|
PALMAS_EXT_CONTROL_PIN_NSLEEP for NSLEEP pin
|
|
Option 0 or missing this property means the clock is enabled/disabled
|
|
via register access and these pins do not have any control.
|
|
The macros of external control pins for DTS is defined at
|
|
dt-bindings/mfd/palmas.h
|
|
|
|
Example:
|
|
#include <dt-bindings/mfd/palmas.h>
|
|
...
|
|
palmas: tps65913@58 {
|
|
...
|
|
clk32kg: palmas_clk32k@0 {
|
|
compatible = "ti,palmas-clk32kg";
|
|
#clock-cells = <0>;
|
|
ti,external-sleep-control = <PALMAS_EXT_CONTROL_PIN_NSLEEP>;
|
|
};
|
|
...
|
|
};
|