Hi Oleksij, On 06/11/2017 09:19 AM, Oleksij Rempel wrote: > 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. that's fine, but the proposed extension is supposedly not wanted. > 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 It'd rather be better to fix the drivers and remove the properties from these found device tree binding descriptions. > > Please fixme if I miss something. Why is GPIO hogging mechanism not good enough for your purpose? -- With best wishes, Vladimir -- 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
