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authorKevin Hao <haokexin@gmail.com>2014-02-19 16:15:45 +0800
committerGrant Likely <grant.likely@linaro.org>2014-02-20 11:50:58 +0000
commit215a14cface21ba205f6edc813be157fdf7899b8 (patch)
tree1dcd62060c2ca6f5698bfe08e618659a69b49c18 /scripts
parent71c5498eed06b5ac4325a525ed83aeed3e9a250a (diff)
downloadlinux-215a14cface21ba205f6edc813be157fdf7899b8.tar.gz
of: reimplement the matching method for __of_match_node()
In the current implementation of __of_match_node(), it will compare each given match entry against all the node's compatible strings with of_device_is_compatible(). To achieve multiple compatible strings per node with ordering from specific to generic, this requires given matches to be ordered from specific to generic. For most of the drivers this is not true and also an alphabetical ordering is more sane there. Therefore, we define a following priority order for the match, and then scan all the entries to find the best match. 1. specific compatible && type && name 2. specific compatible && type 3. specific compatible && name 4. specific compatible 5. general compatible && type && name 6. general compatible && type 7. general compatible && name 8. general compatible 9. type && name 10. type 11. name v5: Fix nested locking bug v4: Short-circuit failure cases instead of mucking with score, and remove extra __of_device_is_compatible() wrapper stub. Move scoring logic directly into __of_device_is_compatible() v3: Also need to bail out when there does have a compatible member in match entry, but it doesn't match with the device node's compatible. v2: Fix the bug such as we get the same score for the following two match entries with the empty node 'name2 { };' struct of_device_id matches[] = { {.name = "name2", }, {.name = "name2", .type = "type1", }, {} }; Signed-off-by: Kevin Hao <haokexin@gmail.com> [grant.likely: added v4 changes] Signed-off-by: Grant Likely <grant.likely@linaro.org> Tested-by: Paul Gortmaker <paul.gortmaker@windriver.com> Tested-by: Stephen Chivers <schivers@csc.com> Tested-by: Sachin Kamat <sachin.kamat@linaro.org>
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