pinctrl: lynxpoint: Introduce helpers to enable or disable input

Introduce couple of helpers to enable or disable input. i.e.
lp_gpio_enable_input() and lp_gpio_disable_input().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>

drivers/pinctrl/intel/pinctrl-lynxpoint.c

@@ -386,6 +386,16 @@ static int lp_pinmux_set_mux(struct pinctrl_dev *pctldev,
 	return 0;
 }
 
+static void lp_gpio_enable_input(void __iomem *reg)
+{
+	iowrite32(ioread32(reg) & ~GPINDIS_BIT, reg);
+}
+
+static void lp_gpio_disable_input(void __iomem *reg)
+{
+	iowrite32(ioread32(reg) | GPINDIS_BIT, reg);
+}
+
 static int lp_gpio_request_enable(struct pinctrl_dev *pctldev,
 				  struct pinctrl_gpio_range *range,
 				  unsigned int pin)
@@ -411,7 +421,7 @@ static int lp_gpio_request_enable(struct pinctrl_dev *pctldev,
 	}
 
 	/* Enable input sensing */
-	iowrite32(ioread32(conf2) & ~GPINDIS_BIT, conf2);
+	lp_gpio_enable_input(conf2);
 
 	raw_spin_unlock_irqrestore(&lg->lock, flags);
 
@@ -429,7 +439,7 @@ static void lp_gpio_disable_free(struct pinctrl_dev *pctldev,
 	raw_spin_lock_irqsave(&lg->lock, flags);
 
 	/* Disable input sensing */
-	iowrite32(ioread32(conf2) | GPINDIS_BIT, conf2);
+	lp_gpio_disable_input(conf2);
 
 	raw_spin_unlock_irqrestore(&lg->lock, flags);
 
@@ -921,14 +931,11 @@ static int lp_gpio_resume(struct device *dev)
 	struct intel_pinctrl *lg = dev_get_drvdata(dev);
 	struct gpio_chip *chip = &lg->chip;
 	const char *dummy;
-	void __iomem *reg;
 	int i;
 
 	/* on some hardware suspend clears input sensing, re-enable it here */
-	for_each_requested_gpio(chip, i, dummy) {
-		reg = lp_gpio_reg(chip, i, LP_CONFIG2);
-		iowrite32(ioread32(reg) & ~GPINDIS_BIT, reg);
-	}
+	for_each_requested_gpio(chip, i, dummy)
+		lp_gpio_enable_input(lp_gpio_reg(chip, i, LP_CONFIG2));
 
 	return 0;
 }