diff options
Diffstat (limited to 'Documentation/userspace-api')
| -rw-r--r-- | Documentation/userspace-api/gpio/gpio-v2-get-line-ioctl.rst | 2 | ||||
| -rw-r--r-- | Documentation/userspace-api/netlink/genetlink-legacy.rst | 22 |
2 files changed, 17 insertions, 7 deletions
diff --git a/Documentation/userspace-api/gpio/gpio-v2-get-line-ioctl.rst b/Documentation/userspace-api/gpio/gpio-v2-get-line-ioctl.rst index 56b975801b6a..6615d6ced755 100644 --- a/Documentation/userspace-api/gpio/gpio-v2-get-line-ioctl.rst +++ b/Documentation/userspace-api/gpio/gpio-v2-get-line-ioctl.rst @@ -81,7 +81,7 @@ Only one event clock flag, ``GPIO_V2_LINE_FLAG_EVENT_CLOCK_xxx``, may be set. If none are set then the event clock defaults to ``CLOCK_MONOTONIC``. The ``GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE`` flag requires supporting hardware and a kernel with ``CONFIG_HTE`` set. Requesting HTE from a device that -doesn't support it is an error (**EOPNOTSUP**). +doesn't support it is an error (**EOPNOTSUPP**). The :c:type:`debounce_period_us<gpio_v2_line_attribute>` attribute may only be applied to lines with ``GPIO_V2_LINE_FLAG_INPUT`` set. When set, debounce diff --git a/Documentation/userspace-api/netlink/genetlink-legacy.rst b/Documentation/userspace-api/netlink/genetlink-legacy.rst index 70a77387f6c4..fa005989193a 100644 --- a/Documentation/userspace-api/netlink/genetlink-legacy.rst +++ b/Documentation/userspace-api/netlink/genetlink-legacy.rst @@ -46,10 +46,16 @@ For reference the ``multi-attr`` array may look like this:: where ``ARRAY-ATTR`` is the array entry type. -array-nest -~~~~~~~~~~ +indexed-array +~~~~~~~~~~~~~ + +``indexed-array`` wraps the entire array in an extra attribute (hence +limiting its size to 64kB). The ``ENTRY`` nests are special and have the +index of the entry as their type instead of normal attribute type. -``array-nest`` creates the following structure:: +A ``sub-type`` is needed to describe what type in the ``ENTRY``. A ``nest`` +``sub-type`` means there are nest arrays in the ``ENTRY``, with the structure +looks like:: [SOME-OTHER-ATTR] [ARRAY-ATTR] @@ -60,9 +66,13 @@ array-nest [MEMBER1] [MEMBER2] -It wraps the entire array in an extra attribute (hence limiting its size -to 64kB). The ``ENTRY`` nests are special and have the index of the entry -as their type instead of normal attribute type. +Other ``sub-type`` like ``u32`` means there is only one member as described +in ``sub-type`` in the ``ENTRY``. The structure looks like:: + + [SOME-OTHER-ATTR] + [ARRAY-ATTR] + [ENTRY u32] + [ENTRY u32] type-value ~~~~~~~~~~ |