Messages in this thread | | | Subject | Re: [PATCH v2] watchdog: s3c2410: Use platform_get_irq() to get the interrupt | From | Guenter Roeck <> | Date | Thu, 16 Dec 2021 16:26:06 -0800 |
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On 12/16/21 1:47 PM, Lad Prabhakar wrote: > 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@bp.renesas.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
> --- > v1->v2 > * Dropped goto and directly returned on error > --- > drivers/watchdog/s3c2410_wdt.c | 15 ++++++--------- > 1 file changed, 6 insertions(+), 9 deletions(-) > > diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c > index 2395f353e52d..d92bc1c24182 100644 > --- a/drivers/watchdog/s3c2410_wdt.c > +++ b/drivers/watchdog/s3c2410_wdt.c > @@ -513,9 +513,9 @@ static int s3c2410wdt_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > struct s3c2410_wdt *wdt; > - struct resource *wdt_irq; > unsigned int wtcon; > int started = 0; > + int wdt_irq; > int ret; > > wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL); > @@ -536,12 +536,9 @@ static int s3c2410wdt_probe(struct platform_device *pdev) > } > } > > - wdt_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); > - if (wdt_irq == NULL) { > - dev_err(dev, "no irq resource specified\n"); > - ret = -ENOENT; > - goto err; > - } > + wdt_irq = platform_get_irq(pdev, 0); > + if (wdt_irq < 0) > + return wdt_irq; > > /* get the memory region for the watchdog timer */ > wdt->reg_base = devm_platform_ioremap_resource(pdev, 0); > @@ -592,8 +589,8 @@ static int s3c2410wdt_probe(struct platform_device *pdev) > dev_info(dev, "default timer value is out of range, cannot start\n"); > } > > - ret = devm_request_irq(dev, wdt_irq->start, s3c2410wdt_irq, 0, > - pdev->name, pdev); > + ret = devm_request_irq(dev, wdt_irq, s3c2410wdt_irq, 0, > + pdev->name, pdev); > if (ret != 0) { > dev_err(dev, "failed to install irq (%d)\n", ret); > goto err_cpufreq; >
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