mmc: sh_mmcif: add support for bundled MMCIF IRQs

On newer SoCs like R-Mobile U2, MMCIF interrupts are bundled.
Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi.px@renesas.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/host/sh_mmcif.c

@@ -1307,10 +1307,11 @@ static int sh_mmcif_probe(struct platform_device *pdev)
 	struct sh_mmcif_plat_data *pd = pdev->dev.platform_data;
 	struct resource *res;
 	void __iomem *reg;
+	const char *name;
 
 	irq[0] = platform_get_irq(pdev, 0);
 	irq[1] = platform_get_irq(pdev, 1);
-	if (irq[0] < 0 || irq[1] < 0) {
+	if (irq[0] < 0) {
 		dev_err(&pdev->dev, "Get irq error\n");
 		return -ENXIO;
 	}
@@ -1375,15 +1376,19 @@ static int sh_mmcif_probe(struct platform_device *pdev)
 	sh_mmcif_sync_reset(host);
 	sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
 
-	ret = request_threaded_irq(irq[0], sh_mmcif_intr, sh_mmcif_irqt, 0, "sh_mmc:error", host);
+	name = irq[1] < 0 ? dev_name(&pdev->dev) : "sh_mmc:error";
+	ret = request_threaded_irq(irq[0], sh_mmcif_intr, sh_mmcif_irqt, 0, name, host);
 	if (ret) {
-		dev_err(&pdev->dev, "request_irq error (sh_mmc:error)\n");
+		dev_err(&pdev->dev, "request_irq error (%s)\n", name);
 		goto ereqirq0;
 	}
-	ret = request_threaded_irq(irq[1], sh_mmcif_intr, sh_mmcif_irqt, 0, "sh_mmc:int", host);
-	if (ret) {
-		dev_err(&pdev->dev, "request_irq error (sh_mmc:int)\n");
-		goto ereqirq1;
+	if (irq[1] >= 0) {
+		ret = request_threaded_irq(irq[1], sh_mmcif_intr, sh_mmcif_irqt,
+					   0, "sh_mmc:int", host);
+		if (ret) {
+			dev_err(&pdev->dev, "request_irq error (sh_mmc:int)\n");
+			goto ereqirq1;
+		}
 	}
 
 	if (pd && pd->use_cd_gpio) {
@@ -1406,7 +1411,8 @@ static int sh_mmcif_probe(struct platform_device *pdev)
 
 emmcaddh:
 erqcd:
-	free_irq(irq[1], host);
+	if (irq[1] >= 0)
+		free_irq(irq[1], host);
 ereqirq1:
 	free_irq(irq[0], host);
 ereqirq0:
@@ -1451,7 +1457,8 @@ static int sh_mmcif_remove(struct platform_device *pdev)
 	irq[1] = platform_get_irq(pdev, 1);
 
 	free_irq(irq[0], host);
-	free_irq(irq[1], host);
+	if (irq[1] >= 0)
+		free_irq(irq[1], host);
 
 	platform_set_drvdata(pdev, NULL);