Kernel-4.18.0-80.el8_ahci-ceva

Binding for CEVA AHCI SATA Controller

Required properties:

• reg: Physical base address and size of the controller’s register area.
• compatible: Compatibility string. Must be ‘ceva,ahci-1v84’.
• clocks: Input clock specifier. Refer to common clock bindings.
• interrupts: Interrupt specifier. Refer to interrupt binding.
• ceva,p0-cominit-params: OOB timing value for COMINIT parameter for port 0.
• ceva,p1-cominit-params: OOB timing value for COMINIT parameter for port 1.

      The fields for the above parameter must be as shown below:
      ceva,pN-cominit-params = /bits/ 8 <CIBGMN CIBGMX CIBGN CINMP>;
      CINMP : COMINIT Negate Minimum Period.
      CIBGN : COMINIT Burst Gap Nominal.
      CIBGMX: COMINIT Burst Gap Maximum.
      CIBGMN: COMINIT Burst Gap Minimum.
  

• ceva,p0-comwake-params: OOB timing value for COMWAKE parameter for port 0.
• ceva,p1-comwake-params: OOB timing value for COMWAKE parameter for port 1.

      The fields for the above parameter must be as shown below:
      ceva,pN-comwake-params = /bits/ 8 <CWBGMN CWBGMX CWBGN CWNMP>;
      CWBGMN: COMWAKE Burst Gap Minimum.
      CWBGMX: COMWAKE Burst Gap Maximum.
      CWBGN: COMWAKE Burst Gap Nominal.
      CWNMP: COMWAKE Negate Minimum Period.
  

• ceva,p0-burst-params: Burst timing value for COM parameter for port 0.
• ceva,p1-burst-params: Burst timing value for COM parameter for port 1.

      The fields for the above parameter must be as shown below:
      ceva,pN-burst-params = /bits/ 8 <BMX BNM SFD PTST>;
      BMX: COM Burst Maximum.
      BNM: COM Burst Nominal.
      SFD: Signal Failure Detection value.
      PTST: Partial to Slumber timer value.
  

• ceva,p0-retry-params: Retry interval timing value for port 0.
• ceva,p1-retry-params: Retry interval timing value for port 1.

      The fields for the above parameter must be as shown below:
      ceva,pN-retry-params = /bits/ 16 <RIT RCT>;
      RIT:  Retry Interval Timer.
      RCT:  Rate Change Timer.
  

Optional properties:

• ceva,broken-gen2: limit to gen1 speed instead of gen2.

Examples:
ahci@fd0c0000 {
compatible = “ceva,ahci-1v84”;
reg = <0xfd0c0000 0x200>;
interrupt-parent = <&gic>;
interrupts = <0 133 4>;
clocks = <&clkc SATA_CLK_ID>;
ceva,p0-cominit-params = /bits/ 8 <0x0F 0x25 0x18 0x29>;
ceva,p0-comwake-params = /bits/ 8 <0x04 0x0B 0x08 0x0F>;
ceva,p0-burst-params = /bits/ 8 <0x0A 0x08 0x4A 0x06>;
ceva,p0-retry-params = /bits/ 16 <0x0216 0x7F06>;

    ceva,p1-cominit-params = /bits/ 8 <0x0F 0x25 0x18 0x29>;
    ceva,p1-comwake-params = /bits/ 8 <0x04 0x0B 0x08 0x0F>;
    ceva,p1-burst-params = /bits/ 8 <0x0A 0x08 0x4A 0x06>;
    ceva,p1-retry-params = /bits/ 16 <0x0216 0x7F06>;
    ceva,broken-gen2;
};