phy: miphy28lp: Avoid calling of_get_child_count() multiple times

Currently, of_get_child_count() is called in each iteration of the for loop in
miphy28lp_xlate(). This patch stores the return value of of_get_child_count()
in miphy_dev->nphys and call of_get_child_count() once in miphy28lp_probe().

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

1 files changed, 6 insertions, 5 deletions

diff --git a/drivers/phy/phy-miphy28lp.c b/drivers/phy/phy-miphy28lp.c
index 9b2848e6115d..d44493230d0c 100644
--- a/drivers/phy/phy-miphy28lp.c
+++ b/drivers/phy/phy-miphy28lp.c
@@ -228,6 +228,7 @@ struct miphy28lp_dev {
         struct regmap *regmap;
         struct mutex miphy_mutex;
         struct miphy28lp_phy **phys;
+        int nphys;
 };
 
 struct miphy_initval {
@@ -1116,7 +1117,7 @@ static struct phy *miphy28lp_xlate(struct device *dev,
                 return ERR_PTR(-EINVAL);
         }
 
-        for (index = 0; index < of_get_child_count(dev->of_node); index++)
+        for (index = 0; index < miphy_dev->nphys; index++)
                 if (phynode == miphy_dev->phys[index]->phy->dev.of_node) {
                         miphy_phy = miphy_dev->phys[index];
                         break;
@@ -1200,15 +1201,15 @@ static int miphy28lp_probe(struct platform_device *pdev)
         struct miphy28lp_dev *miphy_dev;
         struct phy_provider *provider;
         struct phy *phy;
-        int chancount, port = 0;
-        int ret;
+        int ret, port = 0;
 
         miphy_dev = devm_kzalloc(&pdev->dev, sizeof(*miphy_dev), GFP_KERNEL);
         if (!miphy_dev)
                 return -ENOMEM;
 
-        chancount = of_get_child_count(np);
-        miphy_dev->phys = devm_kzalloc(&pdev->dev, sizeof(phy) * chancount,
+        miphy_dev->nphys = of_get_child_count(np);
+        miphy_dev->phys = devm_kzalloc(&pdev->dev,
+                                       sizeof(phy) * miphy_dev->nphys,
                                        GFP_KERNEL);
         if (!miphy_dev->phys)
                 return -ENOMEM;