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Commit 9053f4b9 authored by Anurag Kumar Vulisha's avatar Anurag Kumar Vulisha Committed by Tejun Heo
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devicetree: bindings: Add sata port phy config parameters in ahci-ceva 



This patch adds device tree bindings for sata port phy parameters
in the ahci-ceva.txt file.

Signed-off-by: default avatarAnurag Kumar Vulisha <anuragku@xilinx.com>
Signed-off-by: default avatarMichal Simek <michal.simek@xilinx.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 05b83605

Documentation/devicetree/bindings/ata/ahci-ceva.txt

+39 −0
Original line number Diff line number Diff line
@@ -5,6 +5,36 @@ Required properties: 
  - 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.
@@ -16,5 +46,14 @@ Examples: 
		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;

	};