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Message-ID: <20090120145539.GD2425@trinity.fluff.org>
Date: Tue, 20 Jan 2009 14:55:39 +0000
From: Ben Dooks <ben-linux@...ff.org>
To: Steve Glendinning <steve.glendinning@...c.com>
Cc: linux-arm-kernel@...ts.arm.linux.org.uk, netdev@...r.kernel.org,
David Miller <davem@...emloft.net>,
Russell King <linux@....linux.org.uk>,
Stanley Miao <stanley.miao@...driver.com>,
Ian Saturley <ian.saturley@...c.com>
Subject: Re: [PATCH 1/6] smsc911x: add support for platform-specific irq flags
On Tue, Jan 20, 2009 at 01:28:29PM +0000, Steve Glendinning wrote:
> this patch adds support for the platform_device's resources to indicate
> additional flags to use when registering the irq, for example
> IORESOURCE_IRQ_LOWLEVEL (which corresponds to IRQF_TRIGGER_LOW). These
> should be set in the irq resource flags field.
>
> Signed-off-by: Steve Glendinning <steve.glendinning@...c.com>
> ---
> drivers/net/smsc911x.c | 19 ++++++++++++++-----
> 1 files changed, 14 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/net/smsc911x.c b/drivers/net/smsc911x.c
> index f513bdf..3565df1 100644
> --- a/drivers/net/smsc911x.c
> +++ b/drivers/net/smsc911x.c
> @@ -1892,9 +1892,9 @@ static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
> struct net_device *dev;
> struct smsc911x_data *pdata;
> struct smsc911x_platform_config *config = pdev->dev.platform_data;
> - struct resource *res;
> + struct resource *res, *irq_res;
> unsigned int intcfg = 0;
> - int res_size;
> + int res_size, irq_flags;
> int retval;
> DECLARE_MAC_BUF(mac);
>
> @@ -1919,6 +1919,14 @@ static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
> }
> res_size = res->end - res->start;
>
> + irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
> + if (!irq_res) {
> + pr_warning("%s: Could not allocate irq resource.\n",
> + SMSC_CHIPNAME);
> + retval = -ENODEV;
> + goto out_0;
-ENODEV is certainly not the right code to be returning here, it is
likely to get lost in the driver porbe process.
> + }
> +
> if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
> retval = -EBUSY;
> goto out_0;
> @@ -1935,7 +1943,8 @@ static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
>
> pdata = netdev_priv(dev);
>
> - dev->irq = platform_get_irq(pdev, 0);
> + dev->irq = irq_res->start;
> + irq_flags = irq_res->flags & IRQF_TRIGGER_MASK;
> pdata->ioaddr = ioremap_nocache(res->start, res_size);
>
> /* copy config parameters across to pdata */
> @@ -1968,8 +1977,8 @@ static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
> smsc911x_reg_write(pdata, INT_EN, 0);
> smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
>
> - retval = request_irq(dev->irq, smsc911x_irqhandler, IRQF_DISABLED,
> - dev->name, dev);
> + retval = request_irq(dev->irq, smsc911x_irqhandler,
> + irq_flags | IRQF_DISABLED, dev->name, dev);
> if (retval) {
> SMSC_WARNING(PROBE,
> "Unable to claim requested irq: %d", dev->irq);
> --
> 1.6.0.6
>
>
> -------------------------------------------------------------------
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--
--
Ben
Q: What's a light-year?
A: One-third less calories than a regular year.
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