Binding for CEVA AHCI SATA Controller
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Required properties:
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- reg: Physical base address and size of the controller's register area.
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- compatible: Compatibility string. Must be 'ceva,ahci-1v84'.
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- clocks: Input clock specifier. Refer to common clock bindings.
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- interrupts: Interrupt specifier. Refer to interrupt binding.
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- ceva,p0-cominit-params: OOB timing value for COMINIT parameter for port 0.
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- ceva,p1-cominit-params: OOB timing value for COMINIT parameter for port 1.
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The fields for the above parameter must be as shown below:
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ceva,pN-cominit-params = /bits/ 8 <CIBGMN CIBGMX CIBGN CINMP>;
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CINMP : COMINIT Negate Minimum Period.
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CIBGN : COMINIT Burst Gap Nominal.
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CIBGMX: COMINIT Burst Gap Maximum.
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CIBGMN: COMINIT Burst Gap Minimum.
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- ceva,p0-comwake-params: OOB timing value for COMWAKE parameter for port 0.
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- ceva,p1-comwake-params: OOB timing value for COMWAKE parameter for port 1.
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The fields for the above parameter must be as shown below:
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ceva,pN-comwake-params = /bits/ 8 <CWBGMN CWBGMX CWBGN CWNMP>;
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CWBGMN: COMWAKE Burst Gap Minimum.
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CWBGMX: COMWAKE Burst Gap Maximum.
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CWBGN: COMWAKE Burst Gap Nominal.
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CWNMP: COMWAKE Negate Minimum Period.
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- ceva,p0-burst-params: Burst timing value for COM parameter for port 0.
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- ceva,p1-burst-params: Burst timing value for COM parameter for port 1.
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The fields for the above parameter must be as shown below:
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ceva,pN-burst-params = /bits/ 8 <BMX BNM SFD PTST>;
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BMX: COM Burst Maximum.
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BNM: COM Burst Nominal.
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SFD: Signal Failure Detection value.
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PTST: Partial to Slumber timer value.
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- ceva,p0-retry-params: Retry interval timing value for port 0.
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- ceva,p1-retry-params: Retry interval timing value for port 1.
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The fields for the above parameter must be as shown below:
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ceva,pN-retry-params = /bits/ 16 <RIT RCT>;
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RIT: Retry Interval Timer.
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RCT: Rate Change Timer.
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Optional properties:
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- ceva,broken-gen2: limit to gen1 speed instead of gen2.
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Examples:
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ahci@fd0c0000 {
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compatible = "ceva,ahci-1v84";
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reg = <0xfd0c0000 0x200>;
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interrupt-parent = <&gic>;
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interrupts = <0 133 4>;
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clocks = <&clkc SATA_CLK_ID>;
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ceva,p0-cominit-params = /bits/ 8 <0x0F 0x25 0x18 0x29>;
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ceva,p0-comwake-params = /bits/ 8 <0x04 0x0B 0x08 0x0F>;
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ceva,p0-burst-params = /bits/ 8 <0x0A 0x08 0x4A 0x06>;
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ceva,p0-retry-params = /bits/ 16 <0x0216 0x7F06>;
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ceva,p1-cominit-params = /bits/ 8 <0x0F 0x25 0x18 0x29>;
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ceva,p1-comwake-params = /bits/ 8 <0x04 0x0B 0x08 0x0F>;
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ceva,p1-burst-params = /bits/ 8 <0x0A 0x08 0x4A 0x06>;
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ceva,p1-retry-params = /bits/ 16 <0x0216 0x7F06>;
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ceva,broken-gen2;
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};
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