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author | Jan Luebbe <jlu@pengutronix.de> | 2013-07-03 15:09:12 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-03 16:08:06 -0700 |
commit | c5dbcf8b70b50b1f6ef4850f61d79204ea46d761 (patch) | |
tree | 6c161151b513d5543d4c635cf91d5c8cd77efbe2 /Documentation | |
parent | 05212be363363efbc003d4fa1eaf8e48dfbe425a (diff) | |
download | op-kernel-dev-c5dbcf8b70b50b1f6ef4850f61d79204ea46d761.zip op-kernel-dev-c5dbcf8b70b50b1f6ef4850f61d79204ea46d761.tar.gz |
pps-gpio: add device-tree binding and support
Instead of allocating a struct pps_gpio_platform_data in the DT case,
store the necessary information in struct pps_gpio_device_data itself.
This avoids an additional allocation and the ifdef. It also gets rid of
some indirection.
Also use dev_err instead of pr_err in the changed code.
Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/devicetree/bindings/pps/pps-gpio.txt | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pps/pps-gpio.txt b/Documentation/devicetree/bindings/pps/pps-gpio.txt new file mode 100644 index 0000000..40bf9c3 --- /dev/null +++ b/Documentation/devicetree/bindings/pps/pps-gpio.txt @@ -0,0 +1,20 @@ +Device-Tree Bindings for a PPS Signal on GPIO + +These properties describe a PPS (pulse-per-second) signal connected to +a GPIO pin. + +Required properties: +- compatible: should be "pps-gpio" +- gpios: one PPS GPIO in the format described by ../gpio/gpio.txt + +Optional properties: +- assert-falling-edge: when present, assert is indicated by a falling edge + (instead of by a rising edge) + +Example: + pps { + compatible = "pps-gpio"; + gpios = <&gpio2 6 0>; + + assert-falling-edge; + }; |