[PATCH v5 2/4] opp/of: Allow empty opp-table with opp-shared
From: Nicola Mazzucato <hidden>
Date: 2020-12-08 17:42:28
Also in:
linux-devicetree, linux-pm, lkml
Subsystem:
operating performance points (opp), the rest · Maintainers:
Viresh Kumar, Nishanth Menon, Stephen Boyd, Linus Torvalds
The opp binding now allows to have an empty opp table and shared-opp to still describe that devices share v/f lines. When initialising an empty opp table, allow such case by: - treating such conditions with warnings in place of errors - don't fail on empty table Signed-off-by: Nicola Mazzucato <redacted> --- drivers/opp/of.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index ffd937af8089..03cb387236c4 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c@@ -170,7 +170,8 @@ static void _opp_table_alloc_required_tables(struct opp_table *opp_table, /* Traversing the first OPP node is all we need */ np = of_get_next_available_child(opp_np, NULL); if (!np) { - dev_err(dev, "Empty OPP table\n"); + dev_warn(dev, "Empty OPP table\n"); + return; }
@@ -378,7 +379,9 @@ int dev_pm_opp_of_find_icc_paths(struct device *dev, struct icc_path **paths; ret = _bandwidth_supported(dev, opp_table); - if (ret <= 0) + if (ret == -EINVAL) + return 0; /* Empty OPP table is a valid corner-case, let's not fail */ + else if (ret <= 0) return ret; ret = 0;
--
2.27.0
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