[PATCH 1/3] i2c: bcm2835: Use platform_get_irq() to get the interrupt
From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: 2021-12-18 16:53:12
Also in:
linux-i2c, linux-renesas-soc, lkml
Subsystem:
i2c subsystem, i2c subsystem host drivers, the rest · Maintainers:
Wolfram Sang, Andi Shyti, Linus Torvalds
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> --- drivers/i2c/busses/i2c-bcm2835.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-)
diff --git a/drivers/i2c/busses/i2c-bcm2835.c b/drivers/i2c/busses/i2c-bcm2835.c
index 37443edbf754..d63dec5f3cb1 100644
--- a/drivers/i2c/busses/i2c-bcm2835.c
+++ b/drivers/i2c/busses/i2c-bcm2835.c@@ -402,7 +402,7 @@ static const struct i2c_adapter_quirks bcm2835_i2c_quirks = { static int bcm2835_i2c_probe(struct platform_device *pdev) { struct bcm2835_i2c_dev *i2c_dev; - struct resource *mem, *irq; + struct resource *mem; int ret; struct i2c_adapter *adap; struct clk *mclk;
@@ -452,12 +452,9 @@ static int bcm2835_i2c_probe(struct platform_device *pdev) return ret; } - irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!irq) { - dev_err(&pdev->dev, "No IRQ resource\n"); - return -ENODEV; - } - i2c_dev->irq = irq->start; + i2c_dev->irq = platform_get_irq(pdev, 0); + if (i2c_dev->irq <= 0) + return i2c_dev->irq ? i2c_dev->irq : -ENXIO; ret = request_irq(i2c_dev->irq, bcm2835_i2c_isr, IRQF_SHARED, dev_name(&pdev->dev), i2c_dev);
--
2.17.1
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