diff options
| author | Sivaram Nair <sivaramn@nvidia.com> | 2013-03-14 17:01:50 -0700 |
|---|---|---|
| committer | Mrutyunjay Sawant <msawant@nvidia.com> | 2013-03-19 00:57:43 -0700 |
| commit | 0251963906b6b2189868636b877b0f32920c3b2b (patch) | |
| tree | c69e3832dcd71e5ccc765fc7deda1762f6ab26e5 /drivers/edp | |
| parent | 8f5c3742921dc1f17d5235dca08d45ff66610d64 (diff) | |
EDP: tegra: core E-state request via sysfs
A new sysfs entry is added to core EDP client for changing its E-state
request. This is required to limit the maximum power the core (AP+DRAM)
can be allocated.
Bug 1252183
Change-Id: I2f30284df3994e714f828480ac89390a21a121ee
Signed-off-by: Sivaram Nair <sivaramn@nvidia.com>
Reviewed-on: http://git-master/r/209803
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Diwakar Tundlam <dtundlam@nvidia.com>
Diffstat (limited to 'drivers/edp')
| -rw-r--r-- | drivers/edp/tegra_edp.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/edp/tegra_edp.c b/drivers/edp/tegra_edp.c index 332eb74155d1..5f90fde91ef6 100644 --- a/drivers/edp/tegra_edp.c +++ b/drivers/edp/tegra_edp.c @@ -263,10 +263,41 @@ static struct notifier_block tegra_edp_cpu_nb = { .notifier_call = tegra_edp_cpu_notify }; +static ssize_t core_request_store(struct edp_client *c, + struct edp_client_attribute *attr, const char *s, size_t count) +{ + unsigned int id; + unsigned int approved; + int r; + + if (sscanf(s, "%u", &id) != 1) + return -EINVAL; + + mutex_lock(&core_lock); + + r = edp_update_client_request(c, id, &approved); + if (r) + goto out; + + core_state = approved; + update_cur_corecap(); + __do_cap_control(); + +out: + mutex_unlock(&core_lock); + return r ?: count; +} + +struct edp_client_attribute core_attrs[] = { + __ATTR(set_request, 0200, NULL, core_request_store), + __ATTR_NULL +}; + static struct edp_client core_client = { .name = "core", .priority = EDP_MIN_PRIO, .throttle = state_change_cb, + .attrs = core_attrs, .notify_promotion = state_change_cb, .notify_loan_update = loan_update_cb, .notify_loan_close = loan_close_cb |