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Ingenic JZ47xx SoCs Timer/Counter Unit devicetree bindings
==========================================================
For a description of the TCU hardware and drivers, have a look at
Documentation/mips/ingenic-tcu.rst.
Required properties:
- compatible: Must be one of:
* ingenic,jz4740-tcu
* ingenic,jz4725b-tcu
* ingenic,jz4770-tcu
* ingenic,x1000-tcu
followed by "simple-mfd".
- reg: Should be the offset/length value corresponding to the TCU registers
- clocks: List of phandle & clock specifiers for clocks external to the TCU.
The "pclk", "rtc" and "ext" clocks should be provided. The "tcu" clock
should be provided if the SoC has it.
- clock-names: List of name strings for the external clocks.
- #clock-cells: Should be <1>;
Clock consumers specify this argument to identify a clock. The valid values
may be found in <dt-bindings/clock/ingenic,tcu.h>.
- interrupt-controller : Identifies the node as an interrupt controller
- #interrupt-cells : Specifies the number of cells needed to encode an
interrupt source. The value should be 1.
- interrupts : Specifies the interrupt the controller is connected to.
Optional properties:
- ingenic,pwm-channels-mask: Bitmask of TCU channels reserved for PWM use.
Default value is 0xfc.
Children nodes
==========================================================
PWM node:
---------
Required properties:
- compatible: Must be one of:
* ingenic,jz4740-pwm
* ingenic,jz4725b-pwm
- #pwm-cells: Should be 3. See ../pwm/pwm.yaml for a description of the cell
format.
- clocks: List of phandle & clock specifiers for the TCU clocks.
- clock-names: List of name strings for the TCU clocks.
Watchdog node:
--------------
Required properties:
- compatible: Must be "ingenic,jz4740-watchdog"
- clocks: phandle to the WDT clock
- clock-names: should be "wdt"
OS Timer node:
---------
Required properties:
- compatible: Must be one of:
* ingenic,jz4725b-ost
* ingenic,jz4770-ost
- clocks: phandle to the OST clock
- clock-names: should be "ost"
- interrupts : Specifies the interrupt the OST is connected to.
Example
==========================================================
#include <dt-bindings/clock/jz4770-cgu.h>
#include <dt-bindings/clock/ingenic,tcu.h>
/ {
tcu: timer@10002000 {
compatible = "ingenic,jz4770-tcu", "simple-mfd";
reg = <0x10002000 0x1000>;
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x0 0x10002000 0x1000>;
#clock-cells = <1>;
clocks = <&cgu JZ4770_CLK_RTC
&cgu JZ4770_CLK_EXT
&cgu JZ4770_CLK_PCLK>;
clock-names = "rtc", "ext", "pclk";
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&intc>;
interrupts = <27 26 25>;
watchdog: watchdog@0 {
compatible = "ingenic,jz4740-watchdog";
reg = <0x0 0xc>;
clocks = <&tcu TCU_CLK_WDT>;
clock-names = "wdt";
};
pwm: pwm@40 {
compatible = "ingenic,jz4740-pwm";
reg = <0x40 0x80>;
#pwm-cells = <3>;
clocks = <&tcu TCU_CLK_TIMER0
&tcu TCU_CLK_TIMER1
&tcu TCU_CLK_TIMER2
&tcu TCU_CLK_TIMER3
&tcu TCU_CLK_TIMER4
&tcu TCU_CLK_TIMER5
&tcu TCU_CLK_TIMER6
&tcu TCU_CLK_TIMER7>;
clock-names = "timer0", "timer1", "timer2", "timer3",
"timer4", "timer5", "timer6", "timer7";
};
ost: timer@e0 {
compatible = "ingenic,jz4770-ost";
reg = <0xe0 0x20>;
clocks = <&tcu TCU_CLK_OST>;
clock-names = "ost";
interrupts = <15>;
};
};
};
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