| * 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>; |
| }; |
