On 10/26/2016 8:16 PM, Arnd Bergmann wrote: > On Wednesday, October 26, 2016 7:42:08 PM CEST Imran Khan wrote: >> On 10/26/2016 7:35 PM, Arnd Bergmann wrote: >>>>> As we are talking about generic soc_device_attribute fields, I was hoping that >>>>> having a vendor field would be helpful as along with family it would provide >>>>> a more thorough information. Also as more than one foundries may be used for >>>>> a soc, can we have a field say foundry_id to provide this information. >>> My first feeling is that this 'vendor' information can should be >>> derived from the family. It's also not clear what would happen >>> to this when a company gets bought. E.g. the Oxnas product family >>> was subsequently owned by Oxford, PLX, Avago and Broadcom, and the >>> mxs family was Sigmatel, Freescale, now NXP and might soon be >>> Qualcomm. What would you put in there in this case? >> >> Okay, not having vendor field is fine for me. Could you also suggest >> something about the foundry_id field. > > This one seems more well-defined, so it's probably ok to add. What > would be the use case of reading this? Would you want to read it > just from user space or also from the kernel? > As of now the use case I can think of, only involve reading this from user space. For example for the same soc, coming from different foundries with different manufacturing process, we may have a situation where some inconsistent h/w behavior is being observed only on parts received from a certain foundry and in those cases this information may help in segregation of problematic socs and may also be used in testing these socs under a different set of settings like voltage, frequency etc. > Maybe this can be combined with a manufacturing process, which probably > falls into a similar category, so we could have something like > "TSMC 28ULP" as a string in there. > Yes. Having a manufacturing process as part of foundry-id can provide a more thorough information. > Arnd > -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a\nmember of the Code Aurora Forum, hosted by The Linux Foundation -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
