From mboxrd@z Thu Jan 1 00:00:00 1970 From: viresh.kumar@linaro.org (Viresh Kumar) Date: Mon, 15 Jun 2015 17:27:34 +0530 Subject: [PATCH 08/10] OPP: Add support for opp-suspend In-Reply-To: References: Message-ID: <6a4a0da974d5944a111af6f0b57bcba63a91fe40.1434369079.git.viresh.kumar@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- 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); } -- 2.4.0