[linux-next,v6,04/13] dt-bindings: Add a document of PECI adapter driver for ASPEED AST24xx/25xx SoCs

Message ID 20180621194024.20771-1-jae.hyun.yoo@linux.intel.com
State Not Applicable, archived
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Series
  • PECI device driver introduction
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Commit Message

Jae Hyun Yoo June 21, 2018, 7:40 p.m.
This commit adds a dt-bindings document of PECI adapter driver for ASPEED
AST24xx/25xx SoCs.

Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
Reviewed-by: Haiyue Wang <haiyue.wang@linux.intel.com>
Reviewed-by: James Feist <james.feist@linux.intel.com>
Reviewed-by: Vernon Mauery <vernon.mauery@linux.intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: Jason M Biils <jason.m.bills@linux.intel.com>
Cc: Milton Miller II <miltonm@us.ibm.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Ryan Chen <ryan_chen@aspeedtech.com>
---
 .../devicetree/bindings/peci/peci-aspeed.txt  | 57 +++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/peci/peci-aspeed.txt

Comments

Rob Herring July 3, 2018, 4:51 p.m. | #1
On Thu, Jun 21, 2018 at 12:40:24PM -0700, Jae Hyun Yoo wrote:
> This commit adds a dt-bindings document of PECI adapter driver for ASPEED
> AST24xx/25xx SoCs.
> 
> Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
> Reviewed-by: Haiyue Wang <haiyue.wang@linux.intel.com>
> Reviewed-by: James Feist <james.feist@linux.intel.com>
> Reviewed-by: Vernon Mauery <vernon.mauery@linux.intel.com>
> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Cc: Greg KH <gregkh@linuxfoundation.org>
> Cc: Jason M Biils <jason.m.bills@linux.intel.com>
> Cc: Milton Miller II <miltonm@us.ibm.com>
> Cc: Pavel Machek <pavel@ucw.cz>
> Cc: Robin Murphy <robin.murphy@arm.com>
> Cc: Ryan Chen <ryan_chen@aspeedtech.com>
> ---
>  .../devicetree/bindings/peci/peci-aspeed.txt  | 57 +++++++++++++++++++
>  1 file changed, 57 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/peci/peci-aspeed.txt
> 
> diff --git a/Documentation/devicetree/bindings/peci/peci-aspeed.txt b/Documentation/devicetree/bindings/peci/peci-aspeed.txt
> new file mode 100644
> index 000000000000..8c35f905589d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/peci/peci-aspeed.txt
> @@ -0,0 +1,57 @@
> +Device tree configuration for PECI buses on the AST24XX and AST25XX SoCs.
> +
> +Required properties:
> +- compatible        : Should be "aspeed,ast2400-peci" or "aspeed,ast2500-peci"
> +		      - aspeed,ast2400-peci: ASPEED AST2400 family PECI
> +					     controller
> +		      - aspeed,ast2500-peci: ASPEED AST2500 family PECI
> +					     controller

Just this is sufficient:

Should be one of: 
	"aspeed,ast2400-peci"
	"aspeed,ast2500-peci"

With that,

Reviewed-by: Rob Herring <robh@kernel.org>

> +- reg               : Should contain PECI controller registers location and
> +		      length.
> +- #address-cells    : Should be <1> required to define a client address.
> +- #size-cells       : Should be <0> required to define a client address.
> +- interrupts        : Should contain PECI controller interrupt.
> +- clocks            : Should contain clock source for PECI controller. Should
> +		      reference the external oscillator clock in the second
> +		      cell.
> +- resets            : Should contain phandle to reset controller with the reset
> +		      number in the second cell.
> +- clock-frequency   : Should contain the operation frequency of PECI controller
> +		      in units of Hz.
> +		      187500 ~ 24000000
> +
> +Optional properties:
> +- msg-timing        : Message timing negotiation period. This value will
> +		      determine the period of message timing negotiation to be
> +		      issued by PECI controller. The unit of the programmed
> +		      value is four times of PECI clock period.
> +		      0 ~ 255 (default: 1)
> +- addr-timing       : Address timing negotiation period. This value will
> +		      determine the period of address timing negotiation to be
> +		      issued by PECI controller. The unit of the programmed
> +		      value is four times of PECI clock period.
> +		      0 ~ 255 (default: 1)
> +- rd-sampling-point : Read sampling point selection. The whole period of a bit
> +		      time will be divided into 16 time frames. This value will
> +		      determine the time frame in which the controller will
> +		      sample PECI signal for data read back. Usually in the
> +		      middle of a bit time is the best.
> +		      0 ~ 15 (default: 8)
> +- cmd-timeout-ms    : Command timeout in units of ms.
> +		      1 ~ 60000 (default: 1000)
> +
> +Example:
> +	peci0: peci-bus@0 {
> +		compatible = "aspeed,ast2500-peci";
> +		reg = <0x0 0x60>;
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		interrupts = <15>;
> +		clocks = <&syscon ASPEED_CLK_GATE_REFCLK>;
> +		resets = <&syscon ASPEED_RESET_PECI>;
> +		clock-frequency = <24000000>;
> +		msg-timing = <1>;
> +		addr-timing = <1>;
> +		rd-sampling-point = <8>;
> +		cmd-timeout-ms = <1000>;
> +	};
> -- 
> 2.17.1
>
Jae Hyun Yoo July 3, 2018, 5:01 p.m. | #2
Hi Rob,

Thanks a lot for the review. Please check my inline answer.

On 7/3/2018 9:51 AM, Rob Herring wrote:
> On Thu, Jun 21, 2018 at 12:40:24PM -0700, Jae Hyun Yoo wrote:
>> This commit adds a dt-bindings document of PECI adapter driver for ASPEED
>> AST24xx/25xx SoCs.
>>
>> Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
>> Reviewed-by: Haiyue Wang <haiyue.wang@linux.intel.com>
>> Reviewed-by: James Feist <james.feist@linux.intel.com>
>> Reviewed-by: Vernon Mauery <vernon.mauery@linux.intel.com>
>> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
>> Cc: Greg KH <gregkh@linuxfoundation.org>
>> Cc: Jason M Biils <jason.m.bills@linux.intel.com>
>> Cc: Milton Miller II <miltonm@us.ibm.com>
>> Cc: Pavel Machek <pavel@ucw.cz>
>> Cc: Robin Murphy <robin.murphy@arm.com>
>> Cc: Ryan Chen <ryan_chen@aspeedtech.com>
>> ---
>>   .../devicetree/bindings/peci/peci-aspeed.txt  | 57 +++++++++++++++++++
>>   1 file changed, 57 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/peci/peci-aspeed.txt
>>
>> diff --git a/Documentation/devicetree/bindings/peci/peci-aspeed.txt b/Documentation/devicetree/bindings/peci/peci-aspeed.txt
>> new file mode 100644
>> index 000000000000..8c35f905589d
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/peci/peci-aspeed.txt
>> @@ -0,0 +1,57 @@
>> +Device tree configuration for PECI buses on the AST24XX and AST25XX SoCs.
>> +
>> +Required properties:
>> +- compatible        : Should be "aspeed,ast2400-peci" or "aspeed,ast2500-peci"
>> +		      - aspeed,ast2400-peci: ASPEED AST2400 family PECI
>> +					     controller
>> +		      - aspeed,ast2500-peci: ASPEED AST2500 family PECI
>> +					     controller
> 
> Just this is sufficient:
> 
> Should be one of:
> 	"aspeed,ast2400-peci"
> 	"aspeed,ast2500-peci"
> 
> With that,
> 
> Reviewed-by: Rob Herring <robh@kernel.org>
> 

Thanks! I'll change it as you commented out.

Jae

>> +- reg               : Should contain PECI controller registers location and
>> +		      length.
>> +- #address-cells    : Should be <1> required to define a client address.
>> +- #size-cells       : Should be <0> required to define a client address.
>> +- interrupts        : Should contain PECI controller interrupt.
>> +- clocks            : Should contain clock source for PECI controller. Should
>> +		      reference the external oscillator clock in the second
>> +		      cell.
>> +- resets            : Should contain phandle to reset controller with the reset
>> +		      number in the second cell.
>> +- clock-frequency   : Should contain the operation frequency of PECI controller
>> +		      in units of Hz.
>> +		      187500 ~ 24000000
>> +
>> +Optional properties:
>> +- msg-timing        : Message timing negotiation period. This value will
>> +		      determine the period of message timing negotiation to be
>> +		      issued by PECI controller. The unit of the programmed
>> +		      value is four times of PECI clock period.
>> +		      0 ~ 255 (default: 1)
>> +- addr-timing       : Address timing negotiation period. This value will
>> +		      determine the period of address timing negotiation to be
>> +		      issued by PECI controller. The unit of the programmed
>> +		      value is four times of PECI clock period.
>> +		      0 ~ 255 (default: 1)
>> +- rd-sampling-point : Read sampling point selection. The whole period of a bit
>> +		      time will be divided into 16 time frames. This value will
>> +		      determine the time frame in which the controller will
>> +		      sample PECI signal for data read back. Usually in the
>> +		      middle of a bit time is the best.
>> +		      0 ~ 15 (default: 8)
>> +- cmd-timeout-ms    : Command timeout in units of ms.
>> +		      1 ~ 60000 (default: 1000)
>> +
>> +Example:
>> +	peci0: peci-bus@0 {
>> +		compatible = "aspeed,ast2500-peci";
>> +		reg = <0x0 0x60>;
>> +		#address-cells = <1>;
>> +		#size-cells = <0>;
>> +		interrupts = <15>;
>> +		clocks = <&syscon ASPEED_CLK_GATE_REFCLK>;
>> +		resets = <&syscon ASPEED_RESET_PECI>;
>> +		clock-frequency = <24000000>;
>> +		msg-timing = <1>;
>> +		addr-timing = <1>;
>> +		rd-sampling-point = <8>;
>> +		cmd-timeout-ms = <1000>;
>> +	};
>> -- 
>> 2.17.1
>>

Patch

diff --git a/Documentation/devicetree/bindings/peci/peci-aspeed.txt b/Documentation/devicetree/bindings/peci/peci-aspeed.txt
new file mode 100644
index 000000000000..8c35f905589d
--- /dev/null
+++ b/Documentation/devicetree/bindings/peci/peci-aspeed.txt
@@ -0,0 +1,57 @@ 
+Device tree configuration for PECI buses on the AST24XX and AST25XX SoCs.
+
+Required properties:
+- compatible        : Should be "aspeed,ast2400-peci" or "aspeed,ast2500-peci"
+		      - aspeed,ast2400-peci: ASPEED AST2400 family PECI
+					     controller
+		      - aspeed,ast2500-peci: ASPEED AST2500 family PECI
+					     controller
+- reg               : Should contain PECI controller registers location and
+		      length.
+- #address-cells    : Should be <1> required to define a client address.
+- #size-cells       : Should be <0> required to define a client address.
+- interrupts        : Should contain PECI controller interrupt.
+- clocks            : Should contain clock source for PECI controller. Should
+		      reference the external oscillator clock in the second
+		      cell.
+- resets            : Should contain phandle to reset controller with the reset
+		      number in the second cell.
+- clock-frequency   : Should contain the operation frequency of PECI controller
+		      in units of Hz.
+		      187500 ~ 24000000
+
+Optional properties:
+- msg-timing        : Message timing negotiation period. This value will
+		      determine the period of message timing negotiation to be
+		      issued by PECI controller. The unit of the programmed
+		      value is four times of PECI clock period.
+		      0 ~ 255 (default: 1)
+- addr-timing       : Address timing negotiation period. This value will
+		      determine the period of address timing negotiation to be
+		      issued by PECI controller. The unit of the programmed
+		      value is four times of PECI clock period.
+		      0 ~ 255 (default: 1)
+- rd-sampling-point : Read sampling point selection. The whole period of a bit
+		      time will be divided into 16 time frames. This value will
+		      determine the time frame in which the controller will
+		      sample PECI signal for data read back. Usually in the
+		      middle of a bit time is the best.
+		      0 ~ 15 (default: 8)
+- cmd-timeout-ms    : Command timeout in units of ms.
+		      1 ~ 60000 (default: 1000)
+
+Example:
+	peci0: peci-bus@0 {
+		compatible = "aspeed,ast2500-peci";
+		reg = <0x0 0x60>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		interrupts = <15>;
+		clocks = <&syscon ASPEED_CLK_GATE_REFCLK>;
+		resets = <&syscon ASPEED_RESET_PECI>;
+		clock-frequency = <24000000>;
+		msg-timing = <1>;
+		addr-timing = <1>;
+		rd-sampling-point = <8>;
+		cmd-timeout-ms = <1000>;
+	};