[v11,07/14] dt-bindings: peci: add NPCM PECI documentation
diff mbox series

Message ID 20191211194624.2872-8-jae.hyun.yoo@linux.intel.com
State Not Applicable, archived
Headers show
Series
  • PECI device driver introduction
Related show

Commit Message

Jae Hyun Yoo Dec. 11, 2019, 7:46 p.m. UTC
From: Tomer Maimon <tmaimon77@gmail.com>

Added device tree binding documentation for Nuvoton BMC
NPCM Platform Environment Control Interface(PECI).

Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
---
Changes since v10:
- Newly added in v11.

 .../devicetree/bindings/peci/peci-npcm.yaml   | 102 ++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/peci/peci-npcm.yaml

Comments

Rob Herring Dec. 18, 2019, 2:42 p.m. UTC | #1
On Wed, Dec 11, 2019 at 11:46:17AM -0800, Jae Hyun Yoo wrote:
> From: Tomer Maimon <tmaimon77@gmail.com>
> 
> Added device tree binding documentation for Nuvoton BMC
> NPCM Platform Environment Control Interface(PECI).
> 
> Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
> Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
> ---
> Changes since v10:
> - Newly added in v11.
> 
>  .../devicetree/bindings/peci/peci-npcm.yaml   | 102 ++++++++++++++++++
>  1 file changed, 102 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/peci/peci-npcm.yaml
> 
> diff --git a/Documentation/devicetree/bindings/peci/peci-npcm.yaml b/Documentation/devicetree/bindings/peci/peci-npcm.yaml
> new file mode 100644
> index 000000000000..bcd5626e68e7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/peci/peci-npcm.yaml
> @@ -0,0 +1,102 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/peci/peci-npcm.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Nuvoton NPCM PECI Bus Device Tree Bindings
> +
> +maintainers:
> +  - Tomer Maimon <tmaimon77@gmail.com>
> +
> +properties:
> +  compatible:
> +    const: nuvoton,npcm750-peci # for the NPCM7XX BMC.
> +
> +  reg:
> +    maxItems: 1
> +
> +  "#address-cells":
> +    # Required to define a client address.
> +    const: 1
> +
> +  "#size-cells":
> +    # Required to define a client address.
> +    const: 0
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    # PECI reference clock.
> +    maxItems: 1
> +
> +  cmd-timeout-ms:
> +    # Command timeout in units of ms.
> +    allOf:
> +      - $ref: /schemas/types.yaml#/definitions/uint32

You can drop this as standard units already have a type.

> +      - minimum: 1
> +        maximum: 60000
> +        default: 1000
> +
> +  pull-down:
> +    description: |
> +      Defines the PECI I/O internal pull down operation.
> +        0: pull down always enable
> +        1: pull down only during transactions.
> +        2: pull down always disable.
> +    allOf:
> +      - $ref: /schemas/types.yaml#/definitions/uint32
> +      - minimum: 0
> +        maximum: 2
> +        default: 0
> +
> +  host-neg-bit-rate:
> +    description: |
> +      Define host negotiation bit rate divider.
> +      the host negotiation bit rate calculate with formula:
> +      clock frequency[Hz] / [4 x {host-neg-bit-rate + 1}]
> +    allOf:
> +      - $ref: /schemas/types.yaml#/definitions/uint32
> +      - minimum: 7
> +        maximum: 31
> +        default: 15
> +
> +  high-volt-range:
> +    description: |
> +      Adapts PECI I/O interface to voltage range.
> +        0: PECI I/O interface voltage range of 0.8-1.06V (default)
> +        1: PECI I/O interface voltage range of 0.95-1.26V
> +    type: boolean

These last 4 properties are vendor specific or PECI common. For the 
former, needs a vendor prefix. For the latter, needs to be moved to 
common location.

> +
> +required:
> +  - compatible
> +  - reg
> +  - "#address-cells"
> +  - "#size-cells"
> +  - interrupts
> +  - clocks
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/clock/nuvoton,npcm7xx-clock.h>
> +    peci: bus@100000 {
> +        compatible = "simple-bus";
> +        #address-cells = <1>;
> +        #size-cells = <1>;
> +        ranges = <0x0 0x100000 0x200>;
> +
> +        peci0: peci-bus@0 {
> +            compatible = "nuvoton,npcm750-peci";
> +            reg = <0x0 0x200>;
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +            interrupts = <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>;
> +            clocks = <&clk NPCM7XX_CLK_APB3>;
> +            cmd-timeout-ms = <1000>;
> +            pull-down = <0>;
> +            host-neg-bit-rate = <15>;
> +        };
> +    };
> +...
> -- 
> 2.17.1
>
Jae Hyun Yoo Dec. 18, 2019, 11:30 p.m. UTC | #2
Hi Rob,

On 12/18/2019 6:42 AM, Rob Herring wrote:
> On Wed, Dec 11, 2019 at 11:46:17AM -0800, Jae Hyun Yoo wrote:
>> From: Tomer Maimon <tmaimon77@gmail.com>
>>
>> Added device tree binding documentation for Nuvoton BMC
>> NPCM Platform Environment Control Interface(PECI).
>>
>> Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
>> Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
>> ---
>> Changes since v10:
>> - Newly added in v11.
>>
>>   .../devicetree/bindings/peci/peci-npcm.yaml   | 102 ++++++++++++++++++
>>   1 file changed, 102 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/peci/peci-npcm.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/peci/peci-npcm.yaml b/Documentation/devicetree/bindings/peci/peci-npcm.yaml
>> new file mode 100644
>> index 000000000000..bcd5626e68e7
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/peci/peci-npcm.yaml
>> @@ -0,0 +1,102 @@
>> +# SPDX-License-Identifier: GPL-2.0
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/peci/peci-npcm.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Nuvoton NPCM PECI Bus Device Tree Bindings
>> +
>> +maintainers:
>> +  - Tomer Maimon <tmaimon77@gmail.com>
>> +
>> +properties:
>> +  compatible:
>> +    const: nuvoton,npcm750-peci # for the NPCM7XX BMC.
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  "#address-cells":
>> +    # Required to define a client address.
>> +    const: 1
>> +
>> +  "#size-cells":
>> +    # Required to define a client address.
>> +    const: 0
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    # PECI reference clock.
>> +    maxItems: 1
>> +
>> +  cmd-timeout-ms:
>> +    # Command timeout in units of ms.
>> +    allOf:
>> +      - $ref: /schemas/types.yaml#/definitions/uint32
> 
> You can drop this as standard units already have a type.

I'm assuming you pointed the timeout-ms as one of standard
units, right? I'll drop this ref.

>> +      - minimum: 1
>> +        maximum: 60000
>> +        default: 1000
>> +
>> +  pull-down:
>> +    description: |
>> +      Defines the PECI I/O internal pull down operation.
>> +        0: pull down always enable
>> +        1: pull down only during transactions.
>> +        2: pull down always disable.
>> +    allOf:
>> +      - $ref: /schemas/types.yaml#/definitions/uint32
>> +      - minimum: 0
>> +        maximum: 2
>> +        default: 0
>> +
>> +  host-neg-bit-rate:
>> +    description: |
>> +      Define host negotiation bit rate divider.
>> +      the host negotiation bit rate calculate with formula:
>> +      clock frequency[Hz] / [4 x {host-neg-bit-rate + 1}]
>> +    allOf:
>> +      - $ref: /schemas/types.yaml#/definitions/uint32
>> +      - minimum: 7
>> +        maximum: 31
>> +        default: 15
>> +
>> +  high-volt-range:
>> +    description: |
>> +      Adapts PECI I/O interface to voltage range.
>> +        0: PECI I/O interface voltage range of 0.8-1.06V (default)
>> +        1: PECI I/O interface voltage range of 0.95-1.26V
>> +    type: boolean
> 
> These last 4 properties are vendor specific or PECI common. For the
> former, needs a vendor prefix. For the latter, needs to be moved to
> common location.

These are Nuvoton vendor specifics. I'll add prefix for them and will
check Aspeed bindings too.

Thanks a lot for your review!

-Jae

>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - "#address-cells"
>> +  - "#size-cells"
>> +  - interrupts
>> +  - clocks
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
>> +    #include <dt-bindings/clock/nuvoton,npcm7xx-clock.h>
>> +    peci: bus@100000 {
>> +        compatible = "simple-bus";
>> +        #address-cells = <1>;
>> +        #size-cells = <1>;
>> +        ranges = <0x0 0x100000 0x200>;
>> +
>> +        peci0: peci-bus@0 {
>> +            compatible = "nuvoton,npcm750-peci";
>> +            reg = <0x0 0x200>;
>> +            #address-cells = <1>;
>> +            #size-cells = <0>;
>> +            interrupts = <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>;
>> +            clocks = <&clk NPCM7XX_CLK_APB3>;
>> +            cmd-timeout-ms = <1000>;
>> +            pull-down = <0>;
>> +            host-neg-bit-rate = <15>;
>> +        };
>> +    };
>> +...
>> -- 
>> 2.17.1
>>
>

Patch
diff mbox series

diff --git a/Documentation/devicetree/bindings/peci/peci-npcm.yaml b/Documentation/devicetree/bindings/peci/peci-npcm.yaml
new file mode 100644
index 000000000000..bcd5626e68e7
--- /dev/null
+++ b/Documentation/devicetree/bindings/peci/peci-npcm.yaml
@@ -0,0 +1,102 @@ 
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/peci/peci-npcm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton NPCM PECI Bus Device Tree Bindings
+
+maintainers:
+  - Tomer Maimon <tmaimon77@gmail.com>
+
+properties:
+  compatible:
+    const: nuvoton,npcm750-peci # for the NPCM7XX BMC.
+
+  reg:
+    maxItems: 1
+
+  "#address-cells":
+    # Required to define a client address.
+    const: 1
+
+  "#size-cells":
+    # Required to define a client address.
+    const: 0
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    # PECI reference clock.
+    maxItems: 1
+
+  cmd-timeout-ms:
+    # Command timeout in units of ms.
+    allOf:
+      - $ref: /schemas/types.yaml#/definitions/uint32
+      - minimum: 1
+        maximum: 60000
+        default: 1000
+
+  pull-down:
+    description: |
+      Defines the PECI I/O internal pull down operation.
+        0: pull down always enable
+        1: pull down only during transactions.
+        2: pull down always disable.
+    allOf:
+      - $ref: /schemas/types.yaml#/definitions/uint32
+      - minimum: 0
+        maximum: 2
+        default: 0
+
+  host-neg-bit-rate:
+    description: |
+      Define host negotiation bit rate divider.
+      the host negotiation bit rate calculate with formula:
+      clock frequency[Hz] / [4 x {host-neg-bit-rate + 1}]
+    allOf:
+      - $ref: /schemas/types.yaml#/definitions/uint32
+      - minimum: 7
+        maximum: 31
+        default: 15
+
+  high-volt-range:
+    description: |
+      Adapts PECI I/O interface to voltage range.
+        0: PECI I/O interface voltage range of 0.8-1.06V (default)
+        1: PECI I/O interface voltage range of 0.95-1.26V
+    type: boolean
+
+required:
+  - compatible
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+  - interrupts
+  - clocks
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/nuvoton,npcm7xx-clock.h>
+    peci: bus@100000 {
+        compatible = "simple-bus";
+        #address-cells = <1>;
+        #size-cells = <1>;
+        ranges = <0x0 0x100000 0x200>;
+
+        peci0: peci-bus@0 {
+            compatible = "nuvoton,npcm750-peci";
+            reg = <0x0 0x200>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+            interrupts = <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>;
+            clocks = <&clk NPCM7XX_CLK_APB3>;
+            cmd-timeout-ms = <1000>;
+            pull-down = <0>;
+            host-neg-bit-rate = <15>;
+        };
+    };
+...