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authorNicola Mazzucato <nicola.mazzucato@arm.com>2020-12-08 20:42:27 +0300
committerViresh Kumar <viresh.kumar@linaro.org>2020-12-09 08:53:46 +0300
commit6ee70e8c34e37a34f4dc2c8bc06febffd375fac4 (patch)
treeaa4c790bbcc63816e6edc29cdc9292447b25e4ef /drivers/opp
parent24b3c963c0108f3da6d978d74a745c824ab551dc (diff)
downloadlinux-6ee70e8c34e37a34f4dc2c8bc06febffd375fac4.tar.xz
opp: of: Allow empty opp-table with opp-shared
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 <nicola.mazzucato@arm.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/opp')
-rw-r--r--drivers/opp/of.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index 874b58756220..96113fc0e18c 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -169,7 +169,8 @@ 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;
}
@@ -377,7 +378,9 @@ 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;