linux-kernel - [PATCH v1 2/2] gpio: mlxbf3: use platform_get_irq

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Message-ID: <ce70b98a201ce82b9df9aa80ac7a5eeaa2268e52.1754928650.git.davthompson@nvidia.com>
Date: Mon, 11 Aug 2025 13:50:45 -0400
From: David Thompson <davthompson@...dia.com>
To: <linus.walleij@...aro.org>, <brgl@...ev.pl>,
	<andriy.shevchenko@...ux.intel.com>, <mika.westerberg@...ux.intel.com>
CC: <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>, "David
 Thompson" <davthompson@...dia.com>
Subject: [PATCH v1 2/2] gpio: mlxbf3: use platform_get_irq_optional()

The gpio-mlxbf3 driver interfaces with two GPIO controllers,
device instance 0 and 1. There is a single IRQ resource shared
between the two controllers, and it is found in the ACPI table for
device instance 0. The driver should not use platform_get_irq(),
otherwise this error is logged when probing instance 1:
    mlxbf3_gpio MLNXBF33:01: error -ENXIO: IRQ index 0 not found

Fixes: cd33f216d241 ("gpio: mlxbf3: Add gpio driver support")
Signed-off-by: David Thompson <davthompson@...dia.com>
---
 drivers/gpio/gpio-mlxbf3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-mlxbf3.c b/drivers/gpio/gpio-mlxbf3.c
index 10ea71273c89..ed29b07d16c1 100644
--- a/drivers/gpio/gpio-mlxbf3.c
+++ b/drivers/gpio/gpio-mlxbf3.c
@@ -227,7 +227,7 @@ static int mlxbf3_gpio_probe(struct platform_device *pdev)
 	gc->owner = THIS_MODULE;
 	gc->add_pin_ranges = mlxbf3_gpio_add_pin_ranges;
 
-	irq = platform_get_irq(pdev, 0);
+	irq = platform_get_irq_optional(pdev, 0);
 	if (irq >= 0) {
 		girq = &gs->gc.irq;
 		gpio_irq_chip_set_chip(girq, &gpio_mlxbf3_irqchip);
-- 
2.43.2