stmmac: use custom init/exit functions in pm ops

Freeze and restore can call the custom init/exit functions.
Also the patch adds a custom data field that can be used
for storing platform data useful on restore the embedded
setup (e.g. GPIO, SYSCFG).
Signed-off-by: Francesco Virlinzi <francesco.virlinzi@st.com>
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c

@@ -186,9 +186,6 @@ static int stmmac_pltfr_remove(struct platform_device *pdev)
 	struct resource *res;
 	int ret = stmmac_dvr_remove(ndev);
 
-	if (priv->plat->exit)
-		priv->plat->exit(pdev);
-
 	if (priv->plat->exit)
 		priv->plat->exit(pdev);
 
@@ -218,14 +215,26 @@ static int stmmac_pltfr_resume(struct device *dev)
 
 int stmmac_pltfr_freeze(struct device *dev)
 {
+	int ret;
+	struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev);
 	struct net_device *ndev = dev_get_drvdata(dev);
+	struct platform_device *pdev = to_platform_device(dev);
 
-	return stmmac_freeze(ndev);
+	ret = stmmac_freeze(ndev);
+	if (plat_dat->exit)
+		plat_dat->exit(pdev);
+
+	return ret;
 }
 
 int stmmac_pltfr_restore(struct device *dev)
 {
+	struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev);
 	struct net_device *ndev = dev_get_drvdata(dev);
+	struct platform_device *pdev = to_platform_device(dev);
+
+	if (plat_dat->init)
+		plat_dat->init(pdev);
 
 	return stmmac_restore(ndev);
 }

include/linux/stmmac.h

@@ -109,6 +109,7 @@ struct plat_stmmacenet_data {
 	int (*init)(struct platform_device *pdev);
 	void (*exit)(struct platform_device *pdev);
 	void *custom_cfg;
+	void *custom_data;
 	void *bsp_priv;
 };
 #endif