Thread (17 messages) 17 messages, 4 authors, 2019-01-04

Re: [PATCH v8 08/10] PM / Domains: Add a simple_opp_to_performance_state() helper

From: Ulf Hansson <hidden>
Date: 2018-12-21 10:32:09
Also in: linux-arm-msm, lkml

On Fri, 21 Dec 2018 at 09:57, Rajendra Nayak [off-list ref] wrote:
quoted hunk ↗ jump to hunk
Now that we have atleast 2 genpd providers, both using a simple
routine to read a performance state value from device tree and
return it, in order to implement the .opp_to_performance_state
callback, add a simple_opp_to_performance_state() helper to do
it, so it can be resued across all such genpd providers which
just need to read the value from DT.

Suggested-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Rajendra Nayak <redacted>
Reviewed-by: Stephen Boyd <redacted>
---
 drivers/base/power/domain.c | 17 +++++++++++++++++
 include/linux/pm_domain.h   |  9 +++++++++
 2 files changed, 26 insertions(+)
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 8e554e6a82a2..193872afbe20 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -2520,6 +2520,23 @@ int of_genpd_parse_idle_states(struct device_node *dn,
 }
 EXPORT_SYMBOL_GPL(of_genpd_parse_idle_states);

+unsigned int simple_opp_to_performance_state(struct generic_pm_domain *genpd,
+                                            struct dev_pm_opp *opp,
+                                            const char *name)
+{
Looks like this function should be moved into the OPP library instead.
There is no use of the genpd.
+       struct device_node *np;
+       unsigned int perf_state = 0;
+
+       np = dev_pm_opp_get_of_node(opp);
+       if (of_property_read_u32(np, name, &perf_state))
+               pr_err("%s: missing %s property\n", __func__, name);
+
+       of_node_put(np);
+
+       return perf_state;
+}
+EXPORT_SYMBOL_GPL(simple_opp_to_performance_state);
+
Kind regards
Uffe
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help