leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

firmware: arm_scmi: Add fast_switch_possible() interface

Browse Source 
Add a new fast_switch_possible interface to the existing perf_ops to
export the information of whether or not fast_switch is possible for a
given device.

This can be used by the cpufreq driver and framework to choose proper
mechanism for frequency change.

Link: https://lore.kernel.org/r/20200617094332.8391-1-nicola.mazzucato@arm.com
Suggested-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Nicola Mazzucato <nicola.mazzucato@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Nicola Mazzucato 2020-06-17 10:43:31 +01:00 committed by Sudeep Holla
parent bad0d73b65
commit 1909872ff2
2 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/firmware/arm_scmi/perf.c
View File

@ -697,6 +697,17 @@ static int scmi_dvfs_est_power_get(const struct scmi_handle *handle, u32 domain,
return ret;
}
static bool scmi_fast_switch_possible(const struct scmi_handle *handle,
struct device *dev)
{
struct perf_dom_info *dom;
struct scmi_perf_info *pi = handle->perf_priv;
dom = pi->dom_info + scmi_dev_domain_id(dev);
return dom->fc_info && dom->fc_info->level_set_addr;
}
static struct scmi_perf_ops perf_ops = {
.limits_set = scmi_perf_limits_set,
.limits_get = scmi_perf_limits_get,
@ -708,6 +719,7 @@ static struct scmi_perf_ops perf_ops = {
.freq_set = scmi_dvfs_freq_set,
.freq_get = scmi_dvfs_freq_get,
.est_power_get = scmi_dvfs_est_power_get,
.fast_switch_possible = scmi_fast_switch_possible,
};
static int scmi_perf_protocol_init(struct scmi_handle *handle)

2
include/linux/scmi_protocol.h
View File

@ -118,6 +118,8 @@ struct scmi_perf_ops {
unsigned long *rate, bool poll);
int (*est_power_get)(const struct scmi_handle *handle, u32 domain,
unsigned long *rate, unsigned long *power);
bool (*fast_switch_possible)(const struct scmi_handle *handle,
struct device *dev);
};
/**