On Wed, Sep 21, 2022 at 05:35:19PM -0700, Radha Mohan Chintakuntla wrote: > Hi, > Not sure if this right forum to discuss this issue. > I have a requirement where I have to update the device tree property > with comma-separated values. If I use fdt_setprop() and pass a > 2-dimensional array then it is not creating the property with comma > separation. Instead I get all the values in same cell separated by > space. > > Is there any other way this should be done? > I have referred to some uboot code that used libfdt and does same way > as me but even that has the same problem. > > Any suggestions please? I'm afraid it looks like you have a miunderstanding about the flattened tree format (a very common one, alas). In the dtb, properties are simply bytestrings, there is no type information. You can only separate them into typed values by knowing the binding which describes the format. In other words, in the dtb there is no such thing as "comma separation". Commas in dts are simply a way to notate concatenating bytestrings which can be generated from integers, strings or whatever. When using dtc in dtb -> dts mode, it applies some heuristics to guess the right format to display things in. However it does not - and cannot - get this right all the time. -- David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson
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