As platform_get_irq() now prints an error when the interrupt does not
exist, a scary warning may be printed for an optional interrupt:

    phy_rcar_gen3_usb2 ee0a0200.usb-phy: IRQ index 0 not found

Fix this by calling platform_get_irq_optional() instead.

Fixes: 7723f4c5ecdb8d83 ("driver core: platform: Add an error message to 
platform_get_irq*()")
Signed-off-by: Geert Uytterhoeven <[email protected]>
Reviewed-by: Yoshihiro Shimoda <[email protected]>
Reviewed-by: Stephen Boyd <[email protected]>
Tested-by: Yoshihiro Shimoda <[email protected]>
---
v2:
  - Add Reviewed-by, Tested-by.

This is a fix for v5.4.
---
 drivers/phy/renesas/phy-rcar-gen3-usb2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c 
b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
index b7f6b132439521ea..49ec67d46ccc5a37 100644
--- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
+++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
@@ -614,7 +614,7 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device 
*pdev)
                return PTR_ERR(channel->base);
 
        /* call request_irq for OTG */
-       irq = platform_get_irq(pdev, 0);
+       irq = platform_get_irq_optional(pdev, 0);
        if (irq >= 0) {
                INIT_WORK(&channel->work, rcar_gen3_phy_usb2_work);
                irq = devm_request_irq(dev, irq, rcar_gen3_phy_usb2_irq,
-- 
2.17.1

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