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deleted section on copying driver code

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- changed to "use for inspiration only"
This commit is contained in:
Adam Feuer 2020-09-04 15:55:09 -07:00 committed by Matias N
parent 7632b4d716
commit ce604692db
1 changed files with 4 additions and 6 deletions
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10
Documentation/guides/drivers.rst
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@ -22,17 +22,15 @@ modification.
* Note that you'll have to compare the datasheet to the header and code files to see if there are differences; there
will usually be some differences between architectures, and they can be significant.
* Find a similar driver in U-Boot source code:
* Find a similar driver in U-Boot, Zephyr or BSD Unix (OpenBSD, FreeBSD, NetBSD) source code:
* Only for inspiration, you can't copy code because of license incompatibility.
* Only for inspiration, you can't copy code because of license incompatibility and Apache Foundation restrictions.
(Apache License 2.0 and BSD code can come in with a software grant agreement from the original authors; this can
sometimes be hard to get. Ask on the mailing list if you're unsure.)
* But you can debug to see how the driver works.
* `U-Boot <https://www.denx.de/wiki/U-Boot>`_ drivers are often easier to understand than BSD Unix drivers because
U-Boot is simpler.
* Find a similar driver in Zephyr or BSD Unix (OpenBSD, FreeBSD, NetBSD):
* If you find one, you can borrow code directly (Apache 2.0 and BSD licenses are compatible).
* Understanding how the driver works
Here are a couple of techniques that helped me.