linux-kernel - [PATCH 1/2] gpio: ts5500: Use platform_get

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Message-Id: <20211222171915.9053-2-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date:   Wed, 22 Dec 2021 17:19:14 +0000
From:   Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>, linux-gpio@...r.kernel.org
Cc:     Rob Herring <robh+dt@...nel.org>, linux-kernel@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org,
        Prabhakar <prabhakar.csengg@...il.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH 1/2] gpio: ts5500: Use platform_get_irq() to get the interrupt

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 bypassed the hierarchical setup and messed 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@...renesas.com>
---
 drivers/gpio/gpio-ts5500.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/gpio/gpio-ts5500.c b/drivers/gpio/gpio-ts5500.c
index c91890488402..b159e92a3612 100644
--- a/drivers/gpio/gpio-ts5500.c
+++ b/drivers/gpio/gpio-ts5500.c
@@ -317,22 +317,19 @@ static int ts5500_dio_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	const char *name = dev_name(dev);
 	struct ts5500_priv *priv;
-	struct resource *res;
 	unsigned long flags;
 	int ret;
 
-	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!res) {
-		dev_err(dev, "missing IRQ resource\n");
-		return -EINVAL;
-	}
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
+		return ret;
 
 	priv = devm_kzalloc(dev, sizeof(struct ts5500_priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
 	platform_set_drvdata(pdev, priv);
-	priv->hwirq = res->start;
+	priv->hwirq = ret;
 	spin_lock_init(&priv->lock);
 
 	priv->gpio_chip.owner = THIS_MODULE;
-- 
2.17.1