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Date: Thu, 6 Oct 2022 14:47:17 +0700
From: Quan Nguyen <quan@...amperecomputing.com>
To: Bagas Sanjaya <bagasdotme@...il.com>
Cc: macro@...am.me.uk, Lee Jones <lee@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Jean Delvare <jdelvare@...e.com>,
Guenter Roeck <linux@...ck-us.net>,
Jonathan Corbet <corbet@....net>,
Derek Kiernan <derek.kiernan@...inx.com>,
Dragan Cvetic <dragan.cvetic@...inx.com>,
Arnd Bergmann <arnd@...db.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Thu Nguyen <thu@...amperecomputing.com>,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
linux-hwmon@...r.kernel.org, linux-doc@...r.kernel.org,
OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
Open Source Submission <patches@...erecomputing.com>,
Phong Vo <phong@...amperecomputing.com>,
thang@...amperecomputing.com
Subject: Re: [PATCH v9 6/9] docs: misc-devices: (smpro-misc) Add documentation
On 01/10/2022 11:11, Bagas Sanjaya wrote:
> On Thu, Sep 29, 2022 at 04:43:18PM +0700, Quan Nguyen wrote:
>> Adds documentation for the Ampere(R)'s Altra(R) SMpro misc driver.
>>
>
> s/Adds/Add/
>
>> Signed-off-by: Thu Nguyen <thu@...amperecomputing.com>
>> Signed-off-by: Quan Nguyen <quan@...amperecomputing.com>
>
> Does this patch originally authored by Thu? If so, add From: line before
> the patch description.
>
>> diff --git a/Documentation/misc-devices/index.rst b/Documentation/misc-devices/index.rst
>> index b74b3b34a235..b40cd1b402f7 100644
>> --- a/Documentation/misc-devices/index.rst
>> +++ b/Documentation/misc-devices/index.rst
>> @@ -28,6 +28,7 @@ fit into other categories.
>> oxsemi-tornado
>> pci-endpoint-test
>> smpro-errmon
>> + smpro-misc
>> spear-pcie-gadget
>> uacce
>> xilinx_sdfec
>> diff --git a/Documentation/misc-devices/smpro-misc.rst b/Documentation/misc-devices/smpro-misc.rst
>> new file mode 100644
>> index 000000000000..d21be4a09e69
>> --- /dev/null
>> +++ b/Documentation/misc-devices/smpro-misc.rst
>> @@ -0,0 +1,82 @@
>> +.. SPDX-License-Identifier: GPL-2.0-only
>> +
>> +Kernel driver Ampere(R) Altra(R) SMpro miscellaneous
>> +====================================================
>> +
>> +Supported chips:
>> +
>> + * Ampere(R) Altra(R)
>> +
>> + Prefix: 'smpro'
>> +
>> + Reference: Altra SoC BMC Interface Specification
>> +
>> +Author: Thu Nguyen <thu@...amperecomputing.com>
>> +
>> +Description
>> +-----------
>> +
>> +This driver support the monitoring and configuration of various miscellaneous
>> +data provided by Ampere(R) Altra(R) SMpro processor.
>> +At this time, these include:
>> +
>> + * Reading Boot Progress information
>> + * Configuring SoC Power Limit
>> +
>> +Sysfs entries
>> +-------------
>> +
>> +1) Boot progress
>> +
>> +SMpro misc driver creates the sysfs files ``boot_progress``.
>> +The format of ``boot_progress`` file is as below::
>> +
>> +<boot stage><boot status><boot progress>
>> +
>> +Where:
>> +
>> +* Boot stage::
>> +
>> + 0: SMpro firmware booting.
>> + 1: PMpro firmware booting.
>> + 2: ATF BL1 firmware booting.
>> + 3: DDR initialization.
>> + 4: DDR training report status.
>> + 5: ATF BL2 firmware booting.
>> + 6: ATF BL31 firmware booting.
>> + 7: ATF BL32 firmware booting.
>> + 8: UEFI firmware booting.
>> + 9: OS booting.
>> +
>> +* Boot status::
>> +
>> + 0: Not started.
>> + 1: Started.
>> + 2: Complete without error.
>> + 3: Failure.
>> +
>> +* boot progress: 32 bits boot progress code
>> +
>> +The sysfs ``boot_progress`` only reports the boot state when the host is booting.
>> +If the host is already booted, it returns latest state.
>> +
>> +Example::
>> +
>> + #cat boot_progress
>> + 0102808454A8
>> +
>> +2) SoC Power Limit
>> +
>> +SMpro misc driver creates the sysfs file ``soc_power_limit`` to get/set the SoC Power Limit.
>> +
>> +Reading this sysfs return the current setting of SoC Power Limit (W) in decimal string.
>> +Writing the desired value in decimal string to set the SoC Power Limit in Watt (W).
>> +The range of SoC Power Limit is 90-500(W) and will be ignored if out of range.
>> +
>> +Example::
>> +
>> + #cat soc_power_limit
>> + 90
>> + #echo 95 > soc_power_limit
>> + #cat soc_power_limit
>> + 95
>
> The documentation above can be improved (both grammatical and
> formatting):
>
> ---- >8 ----
>
> diff --git a/Documentation/misc-devices/smpro-misc.rst b/Documentation/misc-devices/smpro-misc.rst
> index d21be4a09e69c4..f33466152ac402 100644
> --- a/Documentation/misc-devices/smpro-misc.rst
> +++ b/Documentation/misc-devices/smpro-misc.rst
> @@ -7,76 +7,77 @@ Supported chips:
>
> * Ampere(R) Altra(R)
>
> - Prefix: 'smpro'
> + Prefix: ``smpro``
>
> - Reference: Altra SoC BMC Interface Specification
> + Reference: `Altra SoC BMC Interface Specification`
>
> Author: Thu Nguyen <thu@...amperecomputing.com>
>
> Description
> -----------
>
> -This driver support the monitoring and configuration of various miscellaneous
> -data provided by Ampere(R) Altra(R) SMpro processor.
> -At this time, these include:
> +The smpro-misc driver supports monitoring and configuration of various
> +miscellaneous data provided by Ampere(R) Altra(R) SMpro processor.
> +Currently, the driver supports:
>
> - * Reading Boot Progress information
> - * Configuring SoC Power Limit
> + * reading boot progress information
> + * configuring SoC power limit
>
> Sysfs entries
> -------------
>
> 1) Boot progress
>
> -SMpro misc driver creates the sysfs files ``boot_progress``.
> -The format of ``boot_progress`` file is as below::
> + The driver creates ``boot_progress`` sysfs file. Its format is described
> + as::
>
> -<boot stage><boot status><boot progress>
> + <boot stage><boot status><boot progress>
>
> -Where:
> + where:
>
> -* Boot stage::
> + * ``<boot stage>`` can be:
>
> - 0: SMpro firmware booting.
> - 1: PMpro firmware booting.
> - 2: ATF BL1 firmware booting.
> - 3: DDR initialization.
> - 4: DDR training report status.
> - 5: ATF BL2 firmware booting.
> - 6: ATF BL31 firmware booting.
> - 7: ATF BL32 firmware booting.
> - 8: UEFI firmware booting.
> - 9: OS booting.
> + * 0: SMpro firmware booting.
> + * 1: PMpro firmware booting.
> + * 2: ATF BL1 firmware booting.
> + * 3: DDR initialization.
> + * 4: DDR training report status.
> + * 5: ATF BL2 firmware booting.
> + * 6: ATF BL31 firmware booting.
> + * 7: ATF BL32 firmware booting.
> + * 8: UEFI firmware booting.
> + * 9: OS booting.
>
> -* Boot status::
> + * ``<boot status>`` can be:
>
> - 0: Not started.
> - 1: Started.
> - 2: Complete without error.
> - 3: Failure.
> + * 0: Not started.
> + * 1: Started.
> + * 2: Complete without error.
> + * 3: Failure.
>
> -* boot progress: 32 bits boot progress code
> + * ``<boot progress>``: 32-bit boot progress code
>
> -The sysfs ``boot_progress`` only reports the boot state when the host is booting.
> -If the host is already booted, it returns latest state.
> + The sysfs file only reports the boot state when the host is booting. If
> + the host is already booted, it returns the latest state.
>
> -Example::
> + Example::
>
> #cat boot_progress
> 0102808454A8
>
> -2) SoC Power Limit
> +2) SoC power limit
>
> -SMpro misc driver creates the sysfs file ``soc_power_limit`` to get/set the SoC Power Limit.
> + The driver creates ``soc_power_limit`` sysfs file to get/set the SoC
> + power limit.
>
> -Reading this sysfs return the current setting of SoC Power Limit (W) in decimal string.
> -Writing the desired value in decimal string to set the SoC Power Limit in Watt (W).
> -The range of SoC Power Limit is 90-500(W) and will be ignored if out of range.
> + Reading the file returns the current limit. Write the desired value in
> + decimal to set the limit (in watts). The valid limit range is 90-500 W.
> + If the value is out of range, it will be ignored.
>
> -Example::
> + Example::
>
> - #cat soc_power_limit
> - 90
> - #echo 95 > soc_power_limit
> - #cat soc_power_limit
> - 95
> + #cat soc_power_limit
> + 90
> + #echo 95 > soc_power_limit
> + #cat soc_power_limit
> + 95
>
Thank you Bagas but as per Greg's comment, this file might be dropped
and move to Documentation/ABI in next version.
Thanks a lot for the detail change.
- Quan
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