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@xxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Quan Nguyen <quan@xxxxxxxxxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxxxxxxxxx>
+
+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@xxxxxxxxxxxxxxxxxxxxxx>
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
