Messages in this thread | | | Date | Tue, 13 Dec 2022 16:42:55 +0100 | From | Johan Hovold <> | Subject | Re: [PATCH 1/4] arm64: dts: qcom: sc8280xp: rename i2c5 to i2c21 |
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On Tue, Dec 13, 2022 at 04:39:54PM +0100, Johan Hovold wrote: > On Tue, Dec 13, 2022 at 09:04:39PM +0530, Shazad Hussain wrote: > > On 12/13/2022 8:58 PM, Johan Hovold wrote:
> > >> So qup2_i2c18 becomes qup2_i2c2. Would I use the flat naming scheme for > > >> the alias like so? > > >> > > >> aliases { > > >> i2c18 = &qup2_i2c2; > > >> } > > > > > > Or perhaps the i2c controllers should use a zero-based index instead of > > > being named after the serial engines (e.g. as we do for the console > > > uart). > > > > > > How are they named in the schematics? > > > > We should use from 0 to N. > > With N being 23 after the number of serial engines, or the number of > available i2c buses on a particular board minus one?
Looks like the more recent Qualcomm platforms use aliases that reflect the engine number (i.e. 0 to 23) for i2c and spi.
Johan
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