phy: renesas: rcar-gen3-usb2: unify OBINTEN handling

This patch unifies the OBINTEN handling to clean-up the code.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

drivers/phy/renesas/phy-rcar-gen3-usb2.c

@@ -142,6 +142,18 @@ static void rcar_gen3_enable_vbus_ctrl(struct rcar_gen3_chan *ch, int vbus)
 	writel(val, usb2_base + USB2_ADPCTRL);
 }
 
+static void rcar_gen3_control_otg_irq(struct rcar_gen3_chan *ch, int enable)
+{
+	void __iomem *usb2_base = ch->base;
+	u32 val = readl(usb2_base + USB2_OBINTEN);
+
+	if (enable)
+		val |= USB2_OBINT_BITS;
+	else
+		val &= ~USB2_OBINT_BITS;
+	writel(val, usb2_base + USB2_OBINTEN);
+}
+
 static void rcar_gen3_init_for_host(struct rcar_gen3_chan *ch)
 {
 	rcar_gen3_set_linectrl(ch, 1, 1);
@@ -187,16 +199,12 @@ static void rcar_gen3_init_for_a_peri(struct rcar_gen3_chan *ch)
 
 static void rcar_gen3_init_from_a_peri_to_a_host(struct rcar_gen3_chan *ch)
 {
-	void __iomem *usb2_base = ch->base;
-	u32 val;
-
-	val = readl(usb2_base + USB2_OBINTEN);
-	writel(val & ~USB2_OBINT_BITS, usb2_base + USB2_OBINTEN);
+	rcar_gen3_control_otg_irq(ch, 0);
 
 	rcar_gen3_enable_vbus_ctrl(ch, 1);
 	rcar_gen3_init_for_host(ch);
 
-	writel(val | USB2_OBINT_BITS, usb2_base + USB2_OBINTEN);
+	rcar_gen3_control_otg_irq(ch, 1);
 }
 
 static bool rcar_gen3_check_id(struct rcar_gen3_chan *ch)
@@ -286,8 +294,7 @@ static void rcar_gen3_init_otg(struct rcar_gen3_chan *ch)
 	val = readl(usb2_base + USB2_VBCTRL);
 	writel(val | USB2_VBCTRL_DRVVBUSSEL, usb2_base + USB2_VBCTRL);
 	writel(USB2_OBINT_BITS, usb2_base + USB2_OBINTSTA);
-	val = readl(usb2_base + USB2_OBINTEN);
-	writel(val | USB2_OBINT_BITS, usb2_base + USB2_OBINTEN);
+	rcar_gen3_control_otg_irq(ch, 1);
 	val = readl(usb2_base + USB2_ADPCTRL);
 	writel(val | USB2_ADPCTRL_IDPULLUP, usb2_base + USB2_ADPCTRL);
 	val = readl(usb2_base + USB2_LINECTRL1);