[incubator-nuttx] 10/10: deleted section on copying driver code

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protobits pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git

commit ce604692dbaf2176939774ddfec0f696fc722553
Author: Adam Feuer <ad...@adamfeuer.com>
AuthorDate: Fri Sep 4 15:55:09 2020 -0700

    deleted section on copying driver code
    
    - changed to "use for inspiration only"
---
 Documentation/guides/drivers.rst | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/Documentation/guides/drivers.rst b/Documentation/guides/drivers.rst
index 9d77be8..d458ed8 100644
--- a/Documentation/guides/drivers.rst
+++ b/Documentation/guides/drivers.rst
@@ -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.