talos-skiboot/core/sensor.c, branch master

sensors: Dont add DTS sensors when OCC inband sensors are available

2018-04-19T23:56:06+00:00

There are two sets of core temperature sensors today. One is DTS scom based core temperature sensors and the second group is the sensors provided by OCC. DTS is the highest temperature among the different temperature zones in the core while OCC core temperature sensors are the average temperature of the core. DTS sensors are read directly by the host by SCOMing the DTS sensors while OCC sensors are read and updated by OCC to main memory. Reading DTS sensors by SCOMing is a heavy and slower operation as compared to reading OCC sensors which is as good as reading memory. So dont add DTS sensors when OCC sensors are available. Signed-off-by: Shilpasri G Bhat Acked-by: Vaidyanathan Srinivasan Signed-off-by: Stewart Smith

sensor-groups: occ: Add support to disable/enable sensor group

2018-02-21T02:28:08+00:00

This patch adds a new opal call to enable/disable a sensor group. This call is used to select the sensor groups that needs to be copied to main memory by OCC at runtime. Signed-off-by: Shilpasri G Bhat [stewart: rebase and bump OPAL API number] Signed-off-by: Stewart Smith

sensors: Support reading u64 sensor values

2018-02-21T00:58:19+00:00

This patch adds support to read u64 sensor values. This also adds changes to the core and the backend implementation code to make this API as the base call. Host can use this new API to read sensors upto 64bits. This adds a list to store the pointer to the kernel u32 buffer, for older kernels making async sensor u32 reads. Signed-off-by: Shilpasri G Bhat Signed-off-by: Stewart Smith

sensors: Fix dtc warning for dts sensors.

2017-12-01T05:52:25+00:00

dtc complains about missing reg property when a DT node is having a unit name or address but no reg property. Example warning for core dts sensor: /ibm,opal/sensors/core-temp@5c has a unit name, but no reg property /ibm,opal/sensors/core-temp@804 has a unit name, but no reg property This patch fixes this by adding necessary properties. Signed-off-by: Pridhiviraj Paidipeddi [stewart: use handle as register rather than chip id] Signed-off-by: Stewart Smith

sensors: dts: Assert special wakeup on idle cores while reading temperature

2017-11-21T02:36:07+00:00

In P9, when a core enters a stop state, its clocks will be stopped to save power and hence we will not be able to perform a scom operation to read the DTS temperature sensor. Hence, assert a special wakeup on cores that have entered a stop state in order to successfully complete the scom operation. Signed-off-by: Shilpasri G Bhat [rlippert@google.com: Clear special wakeup only when it succeeds] Signed-off-by: Stewart Smith

sensors: occ: Add support to clear sensor groups

2017-07-28T04:53:19+00:00

Adds a generic API to clear sensor groups. OCC inband sensor groups such as CSM, Profiler and Job Scheduler can be cleared using this API. It will clear the min/max of all sensors belonging to OCC sensor groups. Signed-off-by: Shilpasri G Bhat Signed-off-by: Stewart Smith

sensors: occ: Add support for OCC inband sensors

2017-07-28T04:53:19+00:00

Add support to parse and export OCC inband sensors which are copied by OCC to main memory in P9. Each OCC writes three buffers which includes one names buffer for sensor meta data and two buffers for sensor readings. While OCC writes to one buffer the sensor values can be read from the other buffer. The sensors are updated every 100ms. This patch adds power, temperature, current and voltage sensors to /ibm,opal/sensors device-tree node which can be exported by the ibmpowernv-hwmon driver in Linux. Signed-off-by: Shilpasri G Bhat Reviewed-by: Cédric Le Goater Signed-off-by: Stewart Smith

sensor: add a family field in the handler

2016-12-08T02:03:23+00:00

Currently, we are hijacking the last bit of the resource field of the sensor handler to differentiate the sensor families and route the opal_sensor_read() call to the appropriate component. Let's reserve the last 3bits and provide an API to set the sensor family for current use and future use. This gives us a maximum of 8 families and 32 resource classes. The FSP uses 15, so we should be fine for a while. Signed-off-by: Cédric Le Goater Signed-off-by: Stewart Smith

sensor: add a compatible property

2015-11-11T23:49:52+00:00

OPAL needs an extra compatible property "ibm,opal-sensor" to make module autoload work smoothly in Linux for ibmpowernv driver. Signed-off-by: Cédric Le Goater Signed-off-by: Stewart Smith

Remove redundant includes of opal-api.h

2015-04-01T01:16:39+00:00

Now that opal.h includes opal-api.h, there are a bunch of files that include both but don't need to. Signed-off-by: Michael Ellerman Signed-off-by: Stewart Smith