pinctrl: lynxpoint: Add GPIO <-> pin mapping ranges via callback

When IRQ chip is instantiated via GPIO library flow, the few functions,
in particular the ACPI event registration mechanism, on some of ACPI based
platforms expect that the pin ranges are initialized to that point.

Add GPIO <-> pin mapping ranges via callback in the GPIO library flow.
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>

drivers/pinctrl/intel/pinctrl-lynxpoint.c

@@ -828,6 +828,19 @@ static int lp_gpio_irq_init_hw(struct gpio_chip *chip)
 	return 0;
 }
 
+static int lp_gpio_add_pin_ranges(struct gpio_chip *chip)
+{
+	struct intel_pinctrl *lg = gpiochip_get_data(chip);
+	struct device *dev = lg->dev;
+	int ret;
+
+	ret = gpiochip_add_pin_range(chip, dev_name(dev), 0, 0, lg->soc->npins);
+	if (ret)
+		dev_err(dev, "failed to add GPIO pin range\n");
+
+	return ret;
+}
+
 static int lp_gpio_probe(struct platform_device *pdev)
 {
 	const struct intel_pinctrl_soc_data *soc;
@@ -899,6 +912,7 @@ static int lp_gpio_probe(struct platform_device *pdev)
 	gc->base = -1;
 	gc->ngpio = LP_NUM_GPIO;
 	gc->can_sleep = false;
+	gc->add_pin_ranges = lp_gpio_add_pin_ranges;
 	gc->parent = dev;
 
 	/* set up interrupts  */