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drivers/fsi: Add documentation for GPIO bindings

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Add fsi master gpio device tree binding documentation.

Includes changes from Jeremy Kerr <jk@ozlabs.org>.

Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christopher Bostic 2017-06-06 16:08:47 -05:00 committed by Greg Kroah-Hartman
parent cd0fdb5c07
commit 777dcf7391
1 changed files with 24 additions and 0 deletions
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Documentation/devicetree/bindings/fsi/fsi-master-gpio.txt Normal file
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Device-tree bindings for gpio-based FSI master driver
-----------------------------------------------------
Required properties:
- compatible = "fsi-master-gpio";
- clock-gpios = <gpio-descriptor>; : GPIO for FSI clock
- data-gpios = <gpio-descriptor>; : GPIO for FSI data signal
Optional properties:
- enable-gpios = <gpio-descriptor>; : GPIO for enable signal
- trans-gpios = <gpio-descriptor>; : GPIO for voltage translator enable
- mux-gpios = <gpio-descriptor>; : GPIO for pin multiplexing with other
functions (eg, external FSI masters)
Examples:
fsi-master {
compatible = "fsi-master-gpio", "fsi-master";
clock-gpios = <&gpio 0>;
data-gpios = <&gpio 1>;
enable-gpios = <&gpio 2>;
trans-gpios = <&gpio 3>;
mux-gpios = <&gpio 4>;
}