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- * Renesas R-Car Compare Match Timer (CMT)
- The CMT is a multi-channel 16/32/48-bit timer/counter with configurable clock
- inputs and programmable compare match.
- Channels share hardware resources but their counter and compare match value
- are independent. A particular CMT instance can implement only a subset of the
- channels supported by the CMT model. Channel indices represent the hardware
- position of the channel in the CMT and don't match the channel numbers in the
- datasheets.
- Required Properties:
- - compatible: must contain one or more of the following:
- - "renesas,cmt-32-r8a7740" for the r8a7740 32-bit CMT
- (CMT0)
- - "renesas,cmt-32-sh7372" for the sh7372 32-bit CMT
- (CMT0)
- - "renesas,cmt-32-sh73a0" for the sh73a0 32-bit CMT
- (CMT0)
- - "renesas,cmt-32" for all 32-bit CMT without fast clock support
- (CMT0 on sh7372, sh73a0 and r8a7740)
- This is a fallback for the above renesas,cmt-32-* entries.
- - "renesas,cmt-32-fast-r8a7740" for the r8a7740 32-bit CMT with fast
- clock support (CMT[234])
- - "renesas,cmt-32-fast-sh7372" for the sh7372 32-bit CMT with fast
- clock support (CMT[234])
- - "renesas,cmt-32-fast-sh73a0" for the sh73A0 32-bit CMT with fast
- clock support (CMT[234])
- - "renesas,cmt-32-fast" for all 32-bit CMT with fast clock support
- (CMT[234] on sh7372, sh73a0 and r8a7740)
- This is a fallback for the above renesas,cmt-32-fast-* entries.
- - "renesas,cmt-48-sh7372" for the sh7372 48-bit CMT
- (CMT1)
- - "renesas,cmt-48-sh73a0" for the sh73A0 48-bit CMT
- (CMT1)
- - "renesas,cmt-48-r8a7740" for the r8a7740 48-bit CMT
- (CMT1)
- - "renesas,cmt-48" for all non-second generation 48-bit CMT
- (CMT1 on sh7372, sh73a0 and r8a7740)
- This is a fallback for the above renesas,cmt-48-* entries.
- - "renesas,cmt-48-r8a73a4" for the r8a73a4 48-bit CMT
- (CMT[01])
- - "renesas,cmt-48-r8a7790" for the r8a7790 48-bit CMT
- (CMT[01])
- - "renesas,cmt-48-r8a7791" for the r8a7791 48-bit CMT
- (CMT[01])
- - "renesas,cmt-48-gen2" for all second generation 48-bit CMT
- (CMT[01] on r8a73a4, r8a7790 and r8a7791)
- This is a fallback for the renesas,cmt-48-r8a73a4,
- renesas,cmt-48-r8a7790 and renesas,cmt-48-r8a7791 entries.
- - reg: base address and length of the registers block for the timer module.
- - interrupts: interrupt-specifier for the timer, one per channel.
- - clocks: a list of phandle + clock-specifier pairs, one for each entry
- in clock-names.
- - clock-names: must contain "fck" for the functional clock.
- - renesas,channels-mask: bitmask of the available channels.
- Example: R8A7790 (R-Car H2) CMT0 node
- CMT0 on R8A7790 implements hardware channels 5 and 6 only and names
- them channels 0 and 1 in the documentation.
- cmt0: timer@ffca0000 {
- compatible = "renesas,cmt-48-r8a7790", "renesas,cmt-48-gen2";
- reg = <0 0xffca0000 0 0x1004>;
- interrupts = <0 142 IRQ_TYPE_LEVEL_HIGH>,
- <0 142 IRQ_TYPE_LEVEL_HIGH>;
- clocks = <&mstp1_clks R8A7790_CLK_CMT0>;
- clock-names = "fck";
- renesas,channels-mask = <0x60>;
- };
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