[PATCH] cpufreq: Use of_property_present()

[Rob Herring (Arm)]

Use of_property_present() to test for property presence rather than
of_(find|get)_property(). This is part of a larger effort to remove
callers of of_find_property() and similar functions. of_find_property()
leaks the DT struct property and data pointers which is a problem for
dynamically allocated nodes which may be freed.

Signed-off-by: Rob Herring (Arm) <r...@kernel.org>
---
 drivers/cpufreq/cpufreq-dt.c           | 11 +++--------
 drivers/cpufreq/pmac64-cpufreq.c       |  2 +-
 drivers/cpufreq/sti-cpufreq.c          |  2 +-
 drivers/cpufreq/sun50i-cpufreq-nvmem.c |  2 +-
 4 files changed, 6 insertions(+), 11 deletions(-)

diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index 6532c4d71338..983443396f8f 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -69,7 +69,6 @@ static int set_target(struct cpufreq_policy *policy, unsigned 
int index)
 static const char *find_supply_name(struct device *dev)
 {
        struct device_node *np __free(device_node) = of_node_get(dev->of_node);
-       struct property *pp;
        int cpu = dev->id;
 
        /* This must be valid for sure */
@@ -77,14 +76,10 @@ static const char *find_supply_name(struct device *dev)
                return NULL;
 
        /* Try "cpu0" for older DTs */
-       if (!cpu) {
-               pp = of_find_property(np, "cpu0-supply", NULL);
-               if (pp)
-                       return "cpu0";
-       }
+       if (!cpu && of_property_present(np, "cpu0-supply"))
+               return "cpu0";
 
-       pp = of_find_property(np, "cpu-supply", NULL);
-       if (pp)
+       if (of_property_present(np, "cpu-supply"))
                return "cpu";
 
        dev_dbg(dev, "no regulator for cpu%d\n", cpu);
diff --git a/drivers/cpufreq/pmac64-cpufreq.c b/drivers/cpufreq/pmac64-cpufreq.c
index 2cd2b06849a2..c87cd6e0b638 100644
--- a/drivers/cpufreq/pmac64-cpufreq.c
+++ b/drivers/cpufreq/pmac64-cpufreq.c
@@ -505,7 +505,7 @@ static int __init g5_pm72_cpufreq_init(struct device_node 
*cpunode)
                        continue;
                if (strcmp(loc, "CPU CLOCK"))
                        continue;
-               if (!of_get_property(hwclock, "platform-get-frequency", NULL))
+               if (!of_property_present(hwclock, "platform-get-frequency"))
                        continue;
                break;
        }
diff --git a/drivers/cpufreq/sti-cpufreq.c b/drivers/cpufreq/sti-cpufreq.c
index 8e2e703c3865..b15b3142b5fe 100644
--- a/drivers/cpufreq/sti-cpufreq.c
+++ b/drivers/cpufreq/sti-cpufreq.c
@@ -267,7 +267,7 @@ static int __init sti_cpufreq_init(void)
                goto skip_voltage_scaling;
        }
 
-       if (!of_get_property(ddata.cpu->of_node, "operating-points-v2", NULL)) {
+       if (!of_property_present(ddata.cpu->of_node, "operating-points-v2")) {
                dev_err(ddata.cpu, "OPP-v2 not supported\n");
                goto skip_voltage_scaling;
        }
diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c 
b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
index 95ac8d46c156..293921acec93 100644
--- a/drivers/cpufreq/sun50i-cpufreq-nvmem.c
+++ b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
@@ -146,7 +146,7 @@ static bool dt_has_supported_hw(void)
                return false;
 
        for_each_child_of_node_scoped(np, opp) {
-               if (of_find_property(opp, "opp-supported-hw", NULL)) {
+               if (of_property_present(opp, "opp-supported-hw")) {
                        has_opp_supported_hw = true;
                        break;
                }
-- 
2.43.0