From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michal Simek Subject: Re: [PATCH] uio/pdrv_genirq: Add OF support Date: Thu, 31 Mar 2011 19:54:09 +0200 Message-ID: <4D94BFC1.5070608@monstr.eu> References: <1301574600-4861-1-git-send-email-monstr@monstr.eu> <1301574600-4861-2-git-send-email-monstr@monstr.eu> <20110331164348.GI26709@ponder.secretlab.ca> Reply-To: monstr-pSz03upnqPeHXe+LvDLADg@public.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20110331164348.GI26709-e0URQFbLeQY2iJbIjFUEsiwD8/FfD2ys@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Sender: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org To: Grant Likely Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, hjk-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, john.williams-g5w7nrANp4BDPfheJLI6IQ@public.gmane.org, gregkh-l3A5Bk7waGM@public.gmane.org List-Id: devicetree@vger.kernel.org Grant Likely wrote: > On Thu, Mar 31, 2011 at 02:30:00PM +0200, Michal Simek wrote: >> Support OF support. "generic-uio" compatible property is used. >> >> Signed-off-by: Michal Simek >> --- >> drivers/uio/uio_pdrv_genirq.c | 60 ++++++++++++++++++++++++++++++++++++++-- >> 1 files changed, 57 insertions(+), 3 deletions(-) >> >> diff --git a/drivers/uio/uio_pdrv_genirq.c b/drivers/uio/uio_pdrv_genirq.c >> index 7174d51..9e89806 100644 >> --- a/drivers/uio/uio_pdrv_genirq.c >> +++ b/drivers/uio/uio_pdrv_genirq.c >> @@ -23,6 +23,10 @@ >> #include >> #include >> >> +#include >> +#include >> +#include >> + >> #define DRIVER_NAME "uio_pdrv_genirq" >> >> struct uio_pdrv_genirq_platdata { >> @@ -92,11 +96,44 @@ static int uio_pdrv_genirq_irqcontrol(struct uio_info *dev_info, s32 irq_on) >> static int uio_pdrv_genirq_probe(struct platform_device *pdev) >> { >> struct uio_info *uioinfo = pdev->dev.platform_data; >> - struct uio_pdrv_genirq_platdata *priv; >> + struct uio_pdrv_genirq_platdata *priv = NULL; >> struct uio_mem *uiomem; >> int ret = -EINVAL; >> int i; >> >> + if (!uioinfo) { >> + struct resource r_irq; /* Interrupt resources */ >> + int rc = 0; >> + >> + rc = of_address_to_resource(pdev->dev.of_node, 0, >> + &pdev->resource[0]); >> + if (rc) { >> + dev_err(&pdev->dev, "invalid address\n"); >> + goto bad2; >> + } >> + pdev->num_resources = 1; > > You shouldn't need this anymore. Device tree sourced platform_devices > get their resource table populated automatically. Also, drivers > should /never/ modify the resource values set in the device because it > messes up driver rebinding. done. > >> + >> + /* 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; >> + /* Use version for storing full IP name for identification */ >> + uioinfo->version = pdev->dev.of_node->full_name; > > Comment on the binding: You should probably use the first entry in the > compatible list for the name of the device. Node names should be > generic and usually they will say what a device does, but not what a > device actually /is/ (this is the Generic Names recommended practice). > > Modern convention is to rely on the first compatible entry for > describing what ip block it is. Is it easy to way to find it out? M -- 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