With "operating-points-v2" bindings, its possible to specify the OPP to which the device must be switched, before suspending.
This patch adds support for getting that information.
Signed-off-by: Viresh Kumar viresh.kumar@linaro.org --- drivers/base/power/opp.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)
diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c index 6b554e417b1f..0022453e4b60 100644 --- a/drivers/base/power/opp.c +++ b/drivers/base/power/opp.c @@ -137,6 +137,7 @@ struct device_opp { struct device_node *np; unsigned long clock_latency_ns_max; bool shared_opp; + struct dev_pm_opp *suspend_opp; };
/* @@ -1218,6 +1219,8 @@ static int _of_init_opp_table_v2(struct device *dev, goto put_opp_np;
if (!ret) { + const phandle *handle; + if (!dev_opp) { dev_opp = _find_device_opp(dev); if (WARN_ON(!dev_opp)) @@ -1227,6 +1230,25 @@ static int _of_init_opp_table_v2(struct device *dev, dev_opp->np = opp_np; if (of_get_property(opp_np, "opp-shared", NULL)) dev_opp->shared_opp = true; + + /* OPP to select on device suspend */ + handle = of_get_property(opp_np, "opp-suspend", NULL); + if (handle) { + struct device_node *suspend_opp_np; + struct dev_pm_opp *opp; + + suspend_opp_np = of_find_node_by_phandle(be32_to_cpup(handle)); + + list_for_each_entry_rcu(opp, &dev_opp->opp_list, node) + if (opp->np == suspend_opp_np) { + dev_opp->suspend_opp = opp; + break; + } + + if (!dev_opp->suspend_opp) + dev_err(dev, "%s: Invalid opp-suspend\n", + __func__); + } } else { of_free_opp_table(dev); }