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powerpc/powernv: Add support to enable sensor groups

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Adds support to enable/disable a sensor group at runtime. This
can be used to select the sensor groups that needs to be copied to
main memory by OCC. Sensor groups like power, temperature, current,
voltage, frequency, utilization can be enabled/disabled at runtime.

Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Shilpasri G Bhat
2018-07-24 14:43:08 +05:30
committed by Michael Ellerman
parent 1961acad2f
commit 04baaf28f4
4 changed files with 32 additions and 0 deletions
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28
arch/powerpc/platforms/powernv/opal-sensor-groups.c
View File

@@ -32,6 +32,34 @@ static struct sensor_group {
struct sg_attr *sgattrs;
} *sgs;
int sensor_group_enable(u32 handle, bool enable)
{
struct opal_msg msg;
int token, ret;
token = opal_async_get_token_interruptible();
if (token < 0)
return token;
ret = opal_sensor_group_enable(handle, token, enable);
if (ret == OPAL_ASYNC_COMPLETION) {
ret = opal_async_wait_response(token, &msg);
if (ret) {
pr_devel("Failed to wait for the async response\n");
ret = -EIO;
goto out;
}
ret = opal_error_code(opal_get_async_rc(msg));
} else {
ret = opal_error_code(ret);
}
out:
opal_async_release_token(token);
return ret;
}
EXPORT_SYMBOL_GPL(sensor_group_enable);
static ssize_t sg_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t count)
{

1
arch/powerpc/platforms/powernv/opal-wrappers.S
View File

@@ -329,3 +329,4 @@ OPAL_CALL(opal_npu_tl_set, OPAL_NPU_TL_SET);
OPAL_CALL(opal_pci_get_pbcq_tunnel_bar, OPAL_PCI_GET_PBCQ_TUNNEL_BAR);
OPAL_CALL(opal_pci_set_pbcq_tunnel_bar, OPAL_PCI_SET_PBCQ_TUNNEL_BAR);
OPAL_CALL(opal_sensor_read_u64, OPAL_SENSOR_READ_U64);
OPAL_CALL(opal_sensor_group_enable, OPAL_SENSOR_GROUP_ENABLE);