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Subject[PATCH v8 10/10] OPP: Add support for setting interconnect-tags
Date
From: Sibi Sankar <sibis@codeaurora.org>

Add support for setting tags on icc paths associated with
the opp_table.

Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
---
v8:
* New patch, picked from here:
https://lore.kernel.org/r/20200504202243.5476-11-sibis@codeaurora.org

drivers/opp/of.c | 24 +++++++++++++++++++-----
1 file changed, 19 insertions(+), 5 deletions(-)

diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index 3a64f2aa0f86..fd148d54022f 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -336,6 +336,7 @@ int _of_find_icc_paths(struct opp_table *opp_table, struct device *dev)
{
struct device_node *np;
int ret, i, count, num_paths;
+ u32 tag;

np = of_node_get(dev->of_node);
if (!np)
@@ -344,20 +345,25 @@ int _of_find_icc_paths(struct opp_table *opp_table, struct device *dev)
count = of_count_phandle_with_args(np, "interconnects",
"#interconnect-cells");
of_node_put(np);
- if (count < 0)
- return 0;
+ if (count < 0) {
+ ret = 0;
+ goto put_np;
+ }

/* two phandles when #interconnect-cells = <1> */
if (count % 2) {
dev_err(dev, "%s: Invalid interconnects values\n", __func__);
- return -EINVAL;
+ ret = -EINVAL;
+ goto put_np;
}

num_paths = count / 2;
opp_table->paths = kcalloc(num_paths, sizeof(*opp_table->paths),
GFP_KERNEL);
- if (!opp_table->paths)
- return -ENOMEM;
+ if (!opp_table->paths) {
+ ret = -ENOMEM;
+ goto put_np;
+ }

for (i = 0; i < num_paths; i++) {
opp_table->paths[i] = of_icc_get_by_index(dev, i);
@@ -369,8 +375,14 @@ int _of_find_icc_paths(struct opp_table *opp_table, struct device *dev)
}
goto err;
}
+
+ /* Set tag if present */
+ if (!of_property_read_u32_index(np, "interconnect-tags",
+ i, &tag))
+ icc_set_tag(opp_table->paths[i], tag);
}
opp_table->path_count = num_paths;
+ of_node_put(np);

return 0;

@@ -380,6 +392,8 @@ int _of_find_icc_paths(struct opp_table *opp_table, struct device *dev)

kfree(opp_table->paths);
opp_table->paths = NULL;
+put_np:
+ of_node_put(np);

return ret;
}
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