kernel.git/drivers/hwmon/occ/common.h, branch linux-5.19.y

hwmon: (occ) Prevent power cap command overwriting poll response

2022-06-29T20:59:23Z

Currently, the response to the power cap command overwrites the first eight bytes of the poll response, since the commands use the same buffer. This means that user's get the wrong data between the time of sending the power cap and the next poll response update. Fix this by specifying a different buffer for the power cap command response. Fixes: 5b5513b88002 ("hwmon: Add On-Chip Controller (OCC) hwmon driver") Signed-off-by: Eddie James Link: https://lore.kernel.org/r/20220628203029.51747-1-eajames@linux.ibm.com Signed-off-by: Guenter Roeck

hwmon: (occ) Delay hwmon registration until user request

2022-05-20T17:57:06Z

Instead of registering the hwmon device at probe time, use the existing "occ_active" sysfs file to control when the driver polls the OCC for sensor data and registers with hwmon. The reason for this change is that the SBE, which is the device by which the driver communicates with the OCC, cannot handle communications during certain system state transitions, resulting in unrecoverable system errors. Signed-off-by: Eddie James Link: https://lore.kernel.org/r/20220427140443.11428-1-eajames@linux.ibm.com Signed-off-by: Guenter Roeck

hwmon: (occ) Add sysfs entry for OCC mode

2022-02-28T01:03:19Z

BMC control applications need to check the OCC mode returned by the OCC poll response, so export it in sysfs with the other OCC-specific data. Signed-off-by: Eddie James Reviewed-by: Joel Stanley Link: https://lore.kernel.org/r/20220215151022.7498-3-eajames@linux.ibm.com Signed-off-by: Guenter Roeck

hwmon: (occ) Add sysfs entry for IPS (Idle Power Saver) status

2022-02-28T01:03:18Z

BMC control applications need to check the Idle Power Saver status byte returned by the OCC poll response, so export it in sysfs with the other OCC-specific data. Signed-off-by: Eddie James Reviewed-by: Joel Stanley Link: https://lore.kernel.org/r/20220215151022.7498-2-eajames@linux.ibm.com Signed-off-by: Guenter Roeck

hwmon: (occ) Remove sequence numbering and checksum calculation

2021-10-15T04:39:26Z

Checksumming of the request and sequence numbering is now done in the OCC interface driver in order to keep unique sequence numbers. So remove those in the hwmon driver. Also, add the command length to the send_cmd function pointer, since the checksum must be placed in the last two bytes of the command. The submit interface must receive the exact size of the command - previously it could be rounded to the nearest 8 bytes with no consequence. Signed-off-by: Eddie James Acked-by: Guenter Roeck Link: https://lore.kernel.org/r/20210721190231.117185-3-eajames@linux.ibm.com Signed-off-by: Joel Stanley

hwmon: (occ) Fix poll rate limiting

2021-05-10T13:27:33Z

The poll rate limiter time was initialized at zero. This breaks the comparison in time_after if jiffies is large. Switch to storing the next update time rather than the previous time, and initialize the time when the device is probed. Fixes: c10e753d43eb ("hwmon (occ): Add sensor types and versions") Signed-off-by: Eddie James Link: https://lore.kernel.org/r/20210429151336.18980-1-eajames@linux.ibm.com Signed-off-by: Guenter Roeck

OCC: FSI and hwmon: Add sequence numbering

2019-07-03T01:11:22Z

Sequence numbering of the commands submitted to the OCC is required by the OCC interface specification. Add sequence numbering and check for the correct sequence number on the response. Signed-off-by: Eddie James Acked-by: Guenter Roeck Reviewed-by: Lei YU Signed-off-by: Joel Stanley

hwmon: (occ) Store error condition for rate-limited polls

2019-04-16T22:12:13Z

The OCC driver limits the rate of sending poll commands to the OCC. If a user reads a hwmon entry after a poll response resulted in an error and is rate-limited, the error is invisible to the user. Fix this by storing the last error and returning that in the rate-limited case. Signed-off-by: Eddie James Signed-off-by: Guenter Roeck

hwmon: (occ) Fix license headers

2019-02-18T22:23:29Z

Files have inconsistent license information. Signed-off-by: Eddie James Signed-off-by: Guenter Roeck

hwmon (occ): Add sysfs attributes for additional OCC data

2018-12-16T23:13:10Z

The OCC provides a variety of additional information about the state of the host processor, such as throttling, error conditions, and the number of OCCs detected in the system. This information is essential to service processor applications such as fan control and host management. Therefore, export this data in the form of sysfs attributes attached to the platform device (to which the hwmon device is also attached). Signed-off-by: Eddie James Signed-off-by: Guenter Roeck