Messages in this thread | | | Subject | Re: [PATCH v4 3/5] dt/bindings: bcm2835: add binding documentation for bcm2835-aux | From | Stephen Warren <> | Date | Tue, 15 Sep 2015 21:12:18 -0700 |
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On 09/04/2015 01:26 AM, Martin Sperl wrote: > >> On 26.08.2015, at 03:44, Stephen Warren <swarren@wwwdotorg.org> wrote: >> >> On 08/24/2015 02:40 AM, kernel@martin.sperl.org wrote: >> >>> +Example: >>> + >>> +aux_enable: aux_enable@0x7e215004 { >>> + compatible = "bcrm,bcm2835-aux"; >>> + reg = <0x7e215004 0x04>; >> >> I'd expect that to be <0x7e215000 0x8>; > > The reason is that we just handle enable with this driver, > which just requires access to the 0x7e215004 register. > > The 0x7e215000 register (interrupt mask) could be used by a > cascaded interrupt-controller, but as the spi and uart drivers > can run with shared interrupts this is not a necessity.
The DT is supposed to describe the HW, not any particular SW's use of the HW. If the HW block has 2 registers, so must the DT reg property.
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