On Wed, 2015-12-16 at 11:26 +0100, Arnd Bergmann wrote: > On Wednesday 16 December 2015 11:04:57 Sergei Ianovich wrote: > > On Tue, 2015-12-15 at 22:51 +0100, Arnd Bergmann wrote: > > > 'x' wildcards in the name of the board seem important. There are > > devices > > made by the same vendor without 8 or 4 in their name. Those devices > > either are not shipped with linux or are base on a x86 platform. > > > > Does this justify the choice of the compatible string? > > What I meant was that you should use the specific numbers of one > machine, > precisely for the reason you list above. > > If there is e.g. a LP-8040 and a LP-8141 today, and you use lp8x4x in > the compatible string to cover both, this will no longer work when the > vendor comes out with a LP8047 that is completely different. > > Instead, what you should do is to use the compatible string to > identify > one particular board (e.g. the first one that used this setup), and > then list the other ones as compatible with this. You can also add the > other board names in addition, e.g. > > compatible = "icpdas,uart-lp8041", "icpdas,uart-lp8040"; > > for a lp8041 that is compatible with the lp8040. If it turns out later > that they are not entirely compatible, we can work around this in the > driver by checking for the lp8041 string that will be matched first, > while > the lp8040 can be used by the driver to match the entire family of > compatible machines (no need to list every one in the driver). I'll try to be more specific. This driver will support ports on LP-8081, LP-8141, LP-8441, LP-8841. Last time I checked the vendor was announcing a series with 3 as the last digit. They use lp8x4x name, eg. in documentation like `LP-8x4x_ChangeLog.txt`. They ship their proprietary SDK in `lp8x4x_sdk_for_linux.tar`. All of this implies that it is a single board. -- 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
