On 08/30/2012 05:09 PM, Karicheri, Muralidharan wrote: >>> -----Original Message----- >>> From: Rob Herring [mailto:robherri...@gmail.com] >>> Sent: Thursday, August 30, 2012 2:27 PM >>> To: Karicheri, Muralidharan >>> Cc: grant.lik...@secretlab.ca; devicetree-disc...@lists.ozlabs.org; linux- >>> ker...@vger.kernel.org >>> Subject: Re: [PATCH] of: add devres version of of_iomap >>> >>> On 08/30/2012 10:32 AM, Murali Karicheri wrote: >>>> This adds devres version of the of_iomap() to allow resource to be cleaned >>>> through devres. >>> >>> If you have a struct device, then don't you already have a resource and >>> can just use devm_ioremap in a driver? New drivers should not be using >>> of_iomap. >>> > > That is the point. If you do a grep under driver, there are many drivers > using the pattern > like this. This helper function is mean to replace this code. > > From dma/sirf-dma.c > > ret = of_address_to_resource(dn, 0, &res); > if (ret) { > dev_err(dev, "Error parsing memory region!\n"); > goto error; > } > > regs_start = res.start; > regs_size = resource_size(&res); > > base = devm_ioremap(dev, regs_start, regs_size); > if (!base) { > dev_err(dev, "Error mapping memory region!\n"); > goto error; > } >
That's wrong and should be fixed. The resource is already setup and available to the probe function. > Other instances. > > edac/mpc85xx_edac.c > media/video/fsl-viu.c > mtd/nand/mpc5121_nfc.c All PPC drivers that used the old of_platform_driver and also need to be updated. > > Some of these code uses devm_request_mem_region() as well. Isn't a good idea > to add this helper > that can be called by new drivers to replace this sequence? I could update > the patch to do this call > as well? devm_request_and_ioremap Rob -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/