Documentation/ABI: Add new attributes for mlxreg-io sysfs interfaces

Add documentation for the new attributes:
- "phy_reset" - Reset PHY.
- "mac_reset" - Reset MAC.
- "qsfp_pwr_good" - The power status of QSFP ports.

Signed-off-by: Michael Shych <michaelsh@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
Link: https://lore.kernel.org/r/20220430115809.54565-4-michaelsh@nvidia.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

diff --git a/Documentation/ABI/stable/sysfs-driver-mlxreg-io b/Documentation/ABI/stable/sysfs-driver-mlxreg-io
index 12c3f89..b312242 100644 (file)
--- a/Documentation/ABI/stable/sysfs-driver-mlxreg-io
+++ b/Documentation/ABI/stable/sysfs-driver-mlxreg-io
@@ -467,3 +467,39 @@ Description:       These files provide the maximum powered required for line card
                feeding and line card configuration Id.
 
                The files are read only.
+
+What:          /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/phy_reset
+Date:          May 2022
+KernelVersion: 5.19
+Contact:       Vadim Pasternak <vadimpmellanox.com>
+Description:   This file allows to reset PHY 88E1548 when attribute is set 0
+               due to some abnormal PHY behavior.
+               Expected behavior:
+               When phy_reset is written 1, all PHY 88E1548 are released
+               from the reset state, when 0 - are hold in reset state.
+
+               The files are read/write.
+
+What:          /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/mac_reset
+Date:          May 2022
+KernelVersion: 5.19
+Contact:       Vadim Pasternak <vadimpmellanox.com>
+Description:   This file allows to reset ASIC MT52132 when attribute is set 0
+               due to some abnormal ASIC behavior.
+               Expected behavior:
+               When mac_reset is written 1, the ASIC MT52132 is released
+               from the reset state, when 0 - is hold in reset state.
+
+               The files are read/write.
+
+What:          /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/qsfp_pwr_good
+Date:          May 2022
+KernelVersion: 5.19
+Contact:       Vadim Pasternak <vadimpmellanox.com>
+Description:   This file shows QSFP ports power status. The value is set to 0
+               when one of any QSFP ports is plugged. The value is set to 1 when
+               there are no any QSFP ports are plugged.
+               The possible values are:
+               0 - Power good, 1 - Not power good.
+
+               The files are read only.