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Date: Tue, 14 Jun 2022 13:48:31 -0600
From: Rob Herring <robh@...nel.org>
To: Piyush Mehta <piyush.mehta@...inx.com>
Cc: damien.lemoal@...nsource.wdc.com,
krzysztof.kozlowski+dt@...aro.org, linux-ide@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
michal.simek@...inx.com, git@...inx.com, sivadur@...inx.com
Subject: Re: [PATCH V2] dt-bindings: ata: ahci-ceva: convert to yaml
On Mon, Jun 13, 2022 at 08:16:51PM +0530, Piyush Mehta wrote:
> Convert the ahci-ceva doc to yaml.
>
> Signed-off-by: Piyush Mehta <piyush.mehta@...inx.com>
> ---
> Changes for V2:
> - Corrected the patch --prefix V3 to V2.
> - Added Required properties.
> ---
> .../devicetree/bindings/ata/ahci-ceva.txt | 63 ------
> .../devicetree/bindings/ata/ahci-ceva.yaml | 197 ++++++++++++++++++
> 2 files changed, 197 insertions(+), 63 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/ata/ahci-ceva.txt
> create mode 100644 Documentation/devicetree/bindings/ata/ahci-ceva.yaml
>
> diff --git a/Documentation/devicetree/bindings/ata/ahci-ceva.txt b/Documentation/devicetree/bindings/ata/ahci-ceva.txt
> deleted file mode 100644
> index bfb6da0281ec..000000000000
> --- a/Documentation/devicetree/bindings/ata/ahci-ceva.txt
> +++ /dev/null
> @@ -1,63 +0,0 @@
> -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.
> - - phys: phandle for the PHY device
> - - resets: phandle to the reset controller for the SATA IP
> -
> -Examples:
> - ahci@...c0000 {
> - 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;
> - phys = <&psgtr 1 PHY_TYPE_SATA 1 1>;
> - resets = <&zynqmp_reset ZYNQMP_RESET_SATA>;
> - };
> diff --git a/Documentation/devicetree/bindings/ata/ahci-ceva.yaml b/Documentation/devicetree/bindings/ata/ahci-ceva.yaml
> new file mode 100644
> index 000000000000..71f9ff0e2844
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/ata/ahci-ceva.yaml
> @@ -0,0 +1,197 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/ata/ahci-ceva.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Ceva AHCI SATA Controller
> +
> +maintainers:
> + - Piyush Mehta <piyush.mehta@...inx.com>
> +
> +description: |
> + The Ceva SATA controller mostly conforms to the AHCI interface with some
> + special extensions to add functionality, is a high-performance dual-port
> + SATA host controller with an AHCI compliant command layer which supports
> + advanced features such as native command queuing and frame information
> + structure (FIS) based switching for systems employing port multipliers.
> +
> +properties:
> + compatible:
> + const: ceva,ahci-1v84
> +
> + reg:
> + maxItems: 1
> +
> + clocks:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + dma-coherent: true
> +
> + power-domains:
> + description: |
> + Specifies a phandle to PM domain provider node.
Don't need generic descriptions for common properties.
> + maxItems: 1
> +
> + ceva,p0-cominit-params:
> + $ref: /schemas/types.yaml#/definitions/uint8-array
> + minItems: 4
> + maxItems: 4
> + description: |
> + OOB timing value for COMINIT parameter for port 0.
> + The fields for the above parameter must be as shown below:-
> + ceva,p0-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.
Better described something like this:
items:
- description: CINMP - COMINIT Negate Minimum Period.
- description: CIBGN - COMINIT Burst Gap Nominal.
- ...
- ...
> +
> + ceva,p0-comwake-params:
> + $ref: /schemas/types.yaml#/definitions/uint8-array
> + minItems: 4
> + maxItems: 4
> + description: |
> + OOB timing value for COMWAKE parameter for port 0.
> + The fields for the above parameter must be as shown below:-
> + ceva,p0-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:
> + $ref: /schemas/types.yaml#/definitions/uint8-array
> + minItems: 4
> + maxItems: 4
> + description: |
> + Burst timing value for COM parameter for port 0.
> + The fields for the above parameter must be as shown below:-
> + ceva,p0-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:
> + $ref: /schemas/types.yaml#/definitions/uint16-array
> + minItems: 2
> + maxItems: 2
> + description: |
> + Retry interval timing value for port 0.
> + The fields for the above parameter must be as shown below:-
> + ceva,p0-retry-params = /bits/ 16 <RIT RCT>;
> + RIT - Retry Interval Timer.
> + RCT - Rate Change Timer.
> +
> + ceva,p1-cominit-params:
> + $ref: /schemas/types.yaml#/definitions/uint8-array
> + minItems: 4
> + maxItems: 4
> + description: |
> + OOB timing value for COMINIT parameter for port 1.
> + The fields for the above parameter must be as shown below:-
> + ceva,p1-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,p1-comwake-params:
> + $ref: /schemas/types.yaml#/definitions/uint8-array
> + minItems: 4
> + maxItems: 4
> + description: |
> + OOB timing value for COMWAKE parameter for port 1.
> + The fields for the above parameter must be as shown below:-
> + ceva,p1-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,p1-burst-params:
> + $ref: /schemas/types.yaml#/definitions/uint8-array
> + minItems: 4
> + maxItems: 4
> + description: |
> + Burst timing value for COM parameter for port 1.
> + The fields for the above parameter must be as shown below:-
> + ceva,p1-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,p1-retry-params:
> + $ref: /schemas/types.yaml#/definitions/uint16-array
> + minItems: 2
> + maxItems: 2
> + description: |
> + 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.
> +
> + ceva,broken-gen2:
> + $ref: /schemas/types.yaml#/definitions/flag
> + description: |
> + limit to gen1 speed instead of gen2.
> +
> + phys:
> + description: |
> + Phandle for the PHY device.
Drop
> + maxItems: 1
> +
> + resets:
> + maxItems: 1
> +
> + '#stream-id-cells':
> + const: 4
? Deprecated and not in any dts file. Drop
> +
> +required:
> + - compatible
> + - reg
> + - clocks
> + - interrupts
> + - ceva,p0-cominit-params
> + - ceva,p0-comwake-params
> + - ceva,p0-burst-params
> + - ceva,p0-retry-params
> + - ceva,p1-cominit-params
> + - ceva,p1-comwake-params
> + - ceva,p1-burst-params
> + - ceva,p1-retry-params
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/clock/xlnx-zynqmp-clk.h>
> + #include <dt-bindings/interrupt-controller/irq.h>
> + #include <dt-bindings/power/xlnx-zynqmp-power.h>
> + #include <dt-bindings/reset/xlnx-zynqmp-resets.h>
> + #include <dt-bindings/clock/xlnx-zynqmp-clk.h>
> + #include <dt-bindings/phy/phy.h>
> +
> + sata: ahci@...c0000 {
> + compatible = "ceva,ahci-1v84";
> + reg = <0xfd0c0000 0x200>;
> + interrupt-parent = <&gic>;
> + interrupts = <0 133 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&zynqmp_clk SATA_REF>;
> + 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;
> + phys = <&psgtr 1 PHY_TYPE_SATA 1 1>;
> + resets = <&zynqmp_reset ZYNQMP_RESET_SATA>;
> + };
> --
> 2.17.1
>
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