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author | Alexandre Courbot <acourbot@nvidia.com> | 2014-10-29 17:13:14 +0900 |
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committer | Linus Walleij <linus.walleij@linaro.org> | 2014-10-30 16:41:47 +0100 |
commit | 2071d0968e564b4b4a11d36dc58de6e57188edd4 (patch) | |
tree | ba3b74d202a655a9a68fafb8ca1cffcc66101bbe /drivers/gpio | |
parent | bd1dbc3b9d20f9fe43d7b06848fc821bc88124c3 (diff) |
Documentation: gpio: guidelines for bindings
Now that ACPI supports named GPIO properties, either through ACPI 5.1 or
the per-driver ACPI GPIO mappings, we can be more narrow about the way
GPIOs should be specified in Device Tree bindings.
This patch updates the GPIO DT bindings documentation to highlight the
following rules for new GPIO bindings:
- All new bindings must have a meaningful name (e.g. the "gpios"
property must not be used)
- The only suffix allowed is "-gpios", no matter the number of
descriptors in the property
- GPIOs can only be grouped under the same property when they serve the
same purpose, a case that should remain exceptional (e.g. bit-banged
data lines).
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
0 files changed, 0 insertions, 0 deletions