pinctrl: lynxpoint: Extract lp_gpio_acpi_use() for future use

We may need this function for other features in the pin control driver.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>

diff --git a/drivers/pinctrl/intel/pinctrl-lynxpoint.c b/drivers/pinctrl/intel/pinctrl-lynxpoint.c
index 3c8241e..d403607 100644 (file)
--- a/drivers/pinctrl/intel/pinctrl-lynxpoint.c
+++ b/drivers/pinctrl/intel/pinctrl-lynxpoint.c
@@ -98,18 +98,28 @@ static void __iomem *lp_gpio_reg(struct gpio_chip *chip, unsigned int offset,
        return lg->regs + reg + reg_offset;
 }
 
+static bool lp_gpio_acpi_use(struct lp_gpio *lg, unsigned int pin)
+{
+       void __iomem *acpi_use;
+
+       acpi_use = lp_gpio_reg(&lg->chip, pin, LP_ACPI_OWNED);
+       if (!acpi_use)
+               return true;
+
+       return !(ioread32(acpi_use) & BIT(pin % 32));
+}
+
 static int lp_gpio_request(struct gpio_chip *chip, unsigned int offset)
 {
        struct lp_gpio *lg = gpiochip_get_data(chip);
        void __iomem *reg = lp_gpio_reg(chip, offset, LP_CONFIG1);
        void __iomem *conf2 = lp_gpio_reg(chip, offset, LP_CONFIG2);
-       void __iomem *acpi_use = lp_gpio_reg(chip, offset, LP_ACPI_OWNED);
        u32 value;
 
        pm_runtime_get(lg->dev); /* should we put if failed */
 
        /* Fail if BIOS reserved pin for ACPI use */
-       if (!(ioread32(acpi_use) & BIT(offset % 32))) {
+       if (lp_gpio_acpi_use(lg, offset)) {
                dev_err(lg->dev, "gpio %d reserved for ACPI\n", offset);
                return -EBUSY;
        }