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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;
};
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