linux-kernel - [PATCH 5/9] gpio: em: use devm_platform_ioremap_resource

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Date:   Thu, 29 Aug 2019 16:37:38 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Jonathan Corbet <corbet@....net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Alban Bedel <albeu@...e.fr>,
        Linus Walleij <linus.walleij@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-gpio@...r.kernel.org, Julia Lawall <Julia.Lawall@...6.fr>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH 5/9] gpio: em: use devm_platform_ioremap_resource_nocache()

From: Bartosz Golaszewski <bgolaszewski@...libre.com>

Use the new devm_platform_ioremap_resource_nocache() helper for memory
range mapping instead of devm_ioremap_nocache() combined with a call to
platform_get_resource().

Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
---
 drivers/gpio/gpio-em.c | 22 +++++++++-------------
 1 file changed, 9 insertions(+), 13 deletions(-)

diff --git a/drivers/gpio/gpio-em.c b/drivers/gpio/gpio-em.c
index a87951293aaa..0f4f5e11278a 100644
--- a/drivers/gpio/gpio-em.c
+++ b/drivers/gpio/gpio-em.c
@@ -269,7 +269,7 @@ static void em_gio_irq_domain_remove(void *data)
 static int em_gio_probe(struct platform_device *pdev)
 {
 	struct em_gio_priv *p;
-	struct resource *io[2], *irq[2];
+	struct resource *irq[2];
 	struct gpio_chip *gpio_chip;
 	struct irq_chip *irq_chip;
 	const char *name = dev_name(&pdev->dev);
@@ -284,25 +284,21 @@ static int em_gio_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, p);
 	spin_lock_init(&p->sense_lock);
 
-	io[0] = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	io[1] = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 	irq[0] = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 	irq[1] = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
 
-	if (!io[0] || !io[1] || !irq[0] || !irq[1]) {
-		dev_err(&pdev->dev, "missing IRQ or IOMEM\n");
+	if (!irq[0] || !irq[1]) {
+		dev_err(&pdev->dev, "missing IRQ resources\n");
 		return -EINVAL;
 	}
 
-	p->base0 = devm_ioremap_nocache(&pdev->dev, io[0]->start,
-					resource_size(io[0]));
-	if (!p->base0)
-		return -ENOMEM;
+	p->base0 = devm_platform_ioremap_resource_nocache(pdev, 0);
+	if (IS_ERR(p->base0))
+		return PTR_ERR(p->base0);
 
-	p->base1 = devm_ioremap_nocache(&pdev->dev, io[1]->start,
-				   resource_size(io[1]));
-	if (!p->base1)
-		return -ENOMEM;
+	p->base1 = devm_platform_ioremap_resource_nocache(pdev, 1);
+	if (IS_ERR(p->base1))
+		return PTR_ERR(p->base1);
 
 	if (of_property_read_u32(pdev->dev.of_node, "ngpios", &ngpios)) {
 		dev_err(&pdev->dev, "Missing ngpios OF property\n");
-- 
2.21.0