Re: [PATCH v5] uio/pdrv_genirq: Add OF support

Michal Simek
2011-05-24T11:27:19Z

Hi Greg,

can you please add it to your tree? I see you have sent pull request.

Thanks,
Michal

Michal Simek wrote:
> Adding OF binding to genirq.
> Version string is setup to the "devicetree".
>
> Compatible string is not setup for now but you can add your
> custom compatible string to uio_of_genirq_match structure.
>
> For example with "vendor,device" compatible string:
> static const struct of_device_id __devinitconst uio_of_genirq_match[] = {
> { .compatible = "vendor,device", },
> { /* empty for now */ },
> };
>
> Signed-off-by: Michal Simek <monstr@monstr.eu>
> CC: Hans J. Koch <hjk@hansjkoch.de>
> CC: Arnd Bergmann <arnd@arndb.de>
> CC: John Williams <john.williams@petalogix.com>
> CC: Grant Likely <grant.likely@secretlab.ca>
> CC: Wolfram Sang <w.sang@pengutronix.de>
>
> ---
> v5: Free uioinfo in genirq_remove
> Use pdev->dev.of_node for OF detection
>
> v4: Remove dev_info messages
> Check irq against -ENXIO for no irq
>
> v3: Fix irq binding
> Use "devicetree" as version string
>
> v2: Remove additional resource binding
> Setup correct version string
> Clear compatible string
> ---
> drivers/uio/uio_pdrv_genirq.c | 44 +++++++++++++++++++++++++++++++++++++++++
> 1 files changed, 44 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/uio/uio_pdrv_genirq.c b/drivers/uio/uio_pdrv_genirq.c
> index 7174d51..24bb395 100644
> --- a/drivers/uio/uio_pdrv_genirq.c
> +++ b/drivers/uio/uio_pdrv_genirq.c
> @@ -23,6 +23,10 @@
> #include <linux/pm_runtime.h>
> #include <linux/slab.h>
>
> +#include <linux/of.h>
> +#include <linux/of_platform.h>
> +#include <linux/of_address.h>
> +
> #define DRIVER_NAME "uio_pdrv_genirq"
>
> struct uio_pdrv_genirq_platdata {
> @@ -97,6 +101,27 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev)
> int ret = -EINVAL;
> int i;
>
> + if (!uioinfo) {
> + int irq;
> +
> + /* alloc uioinfo for one device */
> + uioinfo = kzalloc(sizeof(*uioinfo), GFP_KERNEL);
> + if (!uioinfo) {
> + ret = -ENOMEM;
> + dev_err(&pdev->dev, "unable to kmalloc\n");
> + goto bad2;
> + }
> + uioinfo->name = pdev->dev.of_node->name;
> + uioinfo->version = "devicetree";
> +
> + /* Multiple IRQs are not supported */
> + irq = platform_get_irq(pdev, 0);
> + if (irq == -ENXIO)
> + uioinfo->irq = UIO_IRQ_NONE;
> + else
> + uioinfo->irq = irq;
> + }
> +
> if (!uioinfo || !uioinfo->name || !uioinfo->version) {
> dev_err(&pdev->dev, "missing platform_data\n");
> goto bad0;
> @@ -180,6 +205,10 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev)
> kfree(priv);
> pm_runtime_disable(&pdev->dev);
> bad0:
> + /* kfree uioinfo for OF */
> + if (pdev->dev.of_node)
> + kfree(uioinfo);
> + bad2:
> return ret;
> }
>
> @@ -189,6 +218,11 @@ static int uio_pdrv_genirq_remove(struct platform_device *pdev)
>
> uio_unregister_device(priv->uioinfo);
> pm_runtime_disable(&pdev->dev);
> +
> + /* kfree uioinfo for OF */
> + if (pdev->dev.of_node)
> + kfree(priv->uioinfo);
> +
> kfree(priv);
> return 0;
> }
> @@ -215,6 +249,15 @@ static const struct dev_pm_ops uio_pdrv_genirq_dev_pm_ops = {
> .runtime_resume = uio_pdrv_genirq_runtime_nop,
> };
>
> +#ifdef CONFIG_OF
> +static const struct of_device_id __devinitconst uio_of_genirq_match[] = {
> + { /* empty for now */ },
> +};
> +MODULE_DEVICE_TABLE(of, uio_of_genirq_match);
> +#else
> +# define uio_of_genirq_match NULL
> +#endif
> +
> static struct platform_driver uio_pdrv_genirq = {
> .probe = uio_pdrv_genirq_probe,
> .remove = uio_pdrv_genirq_remove,
> @@ -222,6 +265,7 @@ static struct platform_driver uio_pdrv_genirq = {
> .name = DRIVER_NAME,
> .owner = THIS_MODULE,
> .pm = &uio_pdrv_genirq_dev_pm_ops,
> + .of_match_table = uio_of_genirq_match,
> },
> };
>

--
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian