Messages in this thread | | | Date | Wed, 22 Feb 2012 19:02:38 +0100 | From | Jean-Christophe PLAGNIOL-VILLARD <> | Subject | Re: [PATCH v2 12/19] ARM: at91/rtc-at91sam9: each SoC can select the RTT device to use |
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On 17:25 Wed 22 Feb , Arnd Bergmann wrote: > On Wednesday 22 February 2012, Jean-Christophe PLAGNIOL-VILLARD wrote: > > > But if you change the rtc driver to always bind to the existing > > > "at91_rtt" platform_device and fail the probe() function for the > > > case that you are on at91sam9263 probing the non-RTC device, > > > you should get the exact same result without any extra code > > > in the per-soc files. > > > > agreed but as on at91sam9263 you have 2 RTTs so you can have 2 drivers at the > > same time that use the RTT. So we can not do this except if we set the second > > RTT to an other device name. > > Let me rephrase what I meant then: > > The first driver should in its probe function do: > > if (pdev->id != CONFIG_RTC_DRV_AT91SAM9_RTT) > return -ENODEV; > > while the other driver does > > if (pdev->id == CONFIG_RTC_DRV_AT91SAM9_RTT) > return -ENODEV; > > This way, each driver binds to one device but not the other. > It should even work with an unmodified second driver, as long > as you guarantee that it's loaded after the first one. > > Any reason why this won't work? just one other issue I need to pass the GPBR ressource to the RTC driver only
Best Regards, J.
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