Messages in this thread | | | From | Rob Herring <> | Date | Mon, 1 Jun 2020 11:08:37 -0600 | Subject | Re: [PATCH v2] check: Add 10bit/slave i2c reg flags support |
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On Sat, May 30, 2020 at 3:32 AM Wolfram Sang <wsa@the-dreams.de> wrote: > > > > + addr = reg & 0x3FFFFFFFU; > > + snprintf(unit_addr, sizeof(unit_addr), "%x", addr); > > Hmm, this hardcoded value will not work if we ever need to add another > bit. I hope this will never happen, though.
I had this concern and requested the first time this was submitted (and abandoned) to just mask out the top byte. However, Joel's version of this fix[1] does some actual checks on 10-bit addressing, so I've dropped that request.
> > + if ((reg & (1U << 31)) && addr > 0x3ff) > > Same here with bit 31. I haven't checked DTC but can't we import the > header with the defines into the project? Or is this then a circular > dependency?
Easier to just duplicate the define here which Joel's patches do.
Rob
[1] https://www.spinics.net/lists/devicetree-compiler/msg03196.html
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