Hi Rob, On Fri, Jun 09, 2017 at 10:41:30AM -0500, Rob Herring wrote: > On Fri, Jun 9, 2017 at 9:16 AM, Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx> wrote: > > This property is needed for barebox or may be other bootloaders > > to set proper gpio configuration as early as possible. > > > > This example is mainly based on "lines-initial-states" property > > from this binding documentation: > > Documentation/devicetree/bindings/gpio/gpio-pcf857x.txt > > Don't we have a binding for this already based on gpio-hogs. Markus Pargmann was working on this topic before and suddenly was not able to finish it. I found only some not finished discussions and no code or documentation in linux kernel upstream. So far, I was able to find fallowing patches and discussions: patch 23.08.2015, last comment 11.05.2017: https://patchwork.kernel.org/patch/7096721/ patch 23.02.2016, last comment 09.03.2016: https://patchwork.ozlabs.org/patch/586743/ Since there was objections about node-like design for gpio-initval, I provided an array property, which is similar to initval properties already used for different other device nodes. For example: Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt qcom,ath10k-calibration-data Documentation/devicetree/bindings/gpio/gpio-pcf857x.txt lines-initial-states Please fixme if I miss something. -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
