Messages in this thread | | | Date | Wed, 23 Oct 2013 00:48:35 +0100 | From | Greg Kroah-Hartman <> | Subject | Re: [PATCH 0/4] drivers/misc: add rawio framework and drivers |
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On Tue, Oct 22, 2013 at 11:50:04AM -0700, Bin Gao wrote: > On Tue, Oct 22, 2013 at 10:14:00AM -0700, Guenter Roeck wrote: > > > > > > You can already do this today for PCI with the UIO framework, right? > > > Why duplicate that functionality here with another userapce API that we > > > will then have to maintain for the next 40+ years? > > > > > Same for i2c, where the same functionality is supported through i2c-tools and > > the i2c-dev driver. Adding i2c-tools to initramfs and/or to the root file system > > should not be that much of an issue, much less than having to maintain two APIs > > for the same purpose. > > > > Guenter > > For PCI and memory mapped I/O devices, we have the runtime pm issue that has to > be addressed from kernel space.
Then create a UIO pci driver and you should be fine, right? That's what others do today and it works quite well for them.
greg k-h
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