mmc: meson-gx: support platform interrupt as card detect interrupt

Use a new mmc core feature and support specifying the card detect
gpio interrupt in device tree.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/2bb70611-5dea-1144-51bd-93c46b455392@gmail.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/meson-gx-mmc.c

@@ -1166,7 +1166,7 @@ static int meson_mmc_probe(struct platform_device *pdev)
 	struct resource *res;
 	struct meson_host *host;
 	struct mmc_host *mmc;
-	int ret;
+	int cd_irq, ret;
 
 	mmc = devm_mmc_alloc_host(&pdev->dev, sizeof(struct meson_host));
 	if (!mmc)
@@ -1213,6 +1213,9 @@ static int meson_mmc_probe(struct platform_device *pdev)
 	if (host->irq <= 0)
 		return -EINVAL;
 
+	cd_irq = platform_get_irq_optional(pdev, 1);
+	mmc_gpio_set_cd_irq(mmc, cd_irq);
+
 	host->pinctrl = devm_pinctrl_get(&pdev->dev);
 	if (IS_ERR(host->pinctrl))
 		return PTR_ERR(host->pinctrl);