rtc: ftrtc010: Use platform_get_irq() to get the interrupt

[ Upstream commit 05020a733b02cf7a474305e620fb306cd3abfe84 ]

platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
allocation of IRQ resources in DT core code, this causes an issue
when using hierarchical interrupt domains using "interrupts" property
in the node as this bypasses the hierarchical setup and messes up the
irq chaining.

In preparation for removal of static setup of IRQ resource from DT core
code use platform_get_irq().

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20211220011524.17206-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/rtc/rtc-ftrtc010.c b/drivers/rtc/rtc-ftrtc010.c
index ad3add5db4c82d493aa84b09c828e170ddae95ce..53bb08fe1cd462628d8dbedabdbed7f6fe7a15d3 100644 (file)
--- a/drivers/rtc/rtc-ftrtc010.c
+++ b/drivers/rtc/rtc-ftrtc010.c
@@ -141,11 +141,9 @@ static int ftrtc010_rtc_probe(struct platform_device *pdev)
                }
        }
 
-       res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-       if (!res)
-               return -ENODEV;
-
-       rtc->rtc_irq = res->start;
+       rtc->rtc_irq = platform_get_irq(pdev, 0);
+       if (rtc->rtc_irq < 0)
+               return rtc->rtc_irq;
 
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (!res)