opp: Expose of-node's name in debugfs

[ Upstream commit 021dbecabc93b1610b5db989d52a94e0c6671136 ]

It is difficult to find which OPPs are active at the moment, specially
if there are multiple OPPs with same frequency available in the device
tree (controlled by supported hardware feature).

Expose name of the DT node to find out the exact OPP.

While at it, also expose level field.

Reported-by: Leo Yan <leo.yan@linaro.org>
Tested-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/opp/debugfs.c b/drivers/opp/debugfs.c
index 596c185b5dda4501c119921f5860eda843d1ab74..b5f2f9f39392663d17f340b5f12dad5b4b949a38 100644 (file)
--- a/drivers/opp/debugfs.c
+++ b/drivers/opp/debugfs.c
@@ -10,6 +10,7 @@
 #include <linux/debugfs.h>
 #include <linux/device.h>
 #include <linux/err.h>
+#include <linux/of.h>
 #include <linux/init.h>
 #include <linux/limits.h>
 #include <linux/slab.h>
@@ -131,9 +132,13 @@ void opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table)
        debugfs_create_bool("suspend", S_IRUGO, d, &opp->suspend);
        debugfs_create_u32("performance_state", S_IRUGO, d, &opp->pstate);
        debugfs_create_ulong("rate_hz", S_IRUGO, d, &opp->rate);
+       debugfs_create_u32("level", S_IRUGO, d, &opp->level);
        debugfs_create_ulong("clock_latency_ns", S_IRUGO, d,
                             &opp->clock_latency_ns);
 
+       opp->of_name = of_node_full_name(opp->np);
+       debugfs_create_str("of_name", S_IRUGO, d, (char **)&opp->of_name);
+
        opp_debug_create_supplies(opp, opp_table, d);
        opp_debug_create_bw(opp, opp_table, d);
 

diff --git a/drivers/opp/opp.h b/drivers/opp/opp.h
index 407c3bfe51d9685344ffcc643f7835b273e57aea..45e3a55239a13aef5a971a7e7a170958e0144423 100644 (file)
--- a/drivers/opp/opp.h
+++ b/drivers/opp/opp.h
@@ -96,6 +96,7 @@ struct dev_pm_opp {
 
 #ifdef CONFIG_DEBUG_FS
        struct dentry *dentry;
+       const char *of_name;
 #endif
 };