On Thu, Apr 04, 2013 at 03:30:01PM -0600, Stephen Warren wrote: > On 04/04/2013 03:28 PM, Stephen Warren wrote: > > On 04/03/2013 08:45 AM, Thierry Reding wrote: > >> Move the PCIe driver from arch/arm/mach-tegra into the drivers/pci/host > >> directory. The motivation is to collect various host controller drivers > >> in the same location in order to facilitate refactoring. > >> > >> The Tegra PCIe driver has been largely rewritten, both in order to turn > >> it into a proper platform driver and to add MSI (based on code by > >> Krishna Kishore <kthota@xxxxxxxxxx>) as well as device tree support. > > > >> arch/arm/boot/dts/tegra20.dtsi | 53 + > > > > I guess this has to touch both the driver and the dtsi file so that > > bisectabilty isn't broken? I guess that's OK. > > Actually, can't you move all the *.dts/*.dtsi changes to the start of > the series, then put the driver conversion patch last, to avoid any > bisectability issues and still keep code and DT changes separate? I'm not sure if that'll work. There's this oddity in the Harmony DTS where the regulator@3 is disabled with a comment that this is a hack required until board-harmony-pcie.c is removed. If we change the DTS before the driver rewrite I think that would break requesting the GPIO in the board file. A possible workaround I can think of is accessing the regulator from board-harmony-pcie.c instead of the GPIO directly. But perhaps such an attempt already failed (deferred probing getting in the way?). Since it looks like this series will not make it into 3.10, maybe we should try and at least get these things ironed out so that the merge can be done more easily in 3.11. One big step in that direction would obviously be if we could get the DTS changes merged already which, as you point out, should be independent of the driver rewrite itself. Thierry
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