diff options
| author | Grant Likely <grant.likely@secretlab.ca> | 2011-01-26 10:10:40 -0700 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-01-31 00:09:01 -0700 |
| commit | d524dac9279b6a41ffdf7ff7958c577f2e387db6 (patch) | |
| tree | 294166d18a1c89c4cebb2571ea7b124876fb01ef /Documentation/powerpc/dts-bindings/gpio/gpio.txt | |
| parent | 1bae4ce27c9c90344f23c65ea6966c50ffeae2f5 (diff) | |
| download | op-kernel-dev-d524dac9279b6a41ffdf7ff7958c577f2e387db6.zip op-kernel-dev-d524dac9279b6a41ffdf7ff7958c577f2e387db6.tar.gz | |
dt: Move device tree documentation out of powerpc directory
The device tree is used by more than just PowerPC. Make the documentation
directory available to all.
v2: reorganized files while moving to create arch and driver specific
directories.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Diffstat (limited to 'Documentation/powerpc/dts-bindings/gpio/gpio.txt')
| -rw-r--r-- | Documentation/powerpc/dts-bindings/gpio/gpio.txt | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/Documentation/powerpc/dts-bindings/gpio/gpio.txt b/Documentation/powerpc/dts-bindings/gpio/gpio.txt deleted file mode 100644 index edaa84d..0000000 --- a/Documentation/powerpc/dts-bindings/gpio/gpio.txt +++ /dev/null @@ -1,50 +0,0 @@ -Specifying GPIO information for devices -============================================ - -1) gpios property ------------------ - -Nodes that makes use of GPIOs should define them using `gpios' property, -format of which is: <&gpio-controller1-phandle gpio1-specifier - &gpio-controller2-phandle gpio2-specifier - 0 /* holes are permitted, means no GPIO 3 */ - &gpio-controller4-phandle gpio4-specifier - ...>; - -Note that gpio-specifier length is controller dependent. - -gpio-specifier may encode: bank, pin position inside the bank, -whether pin is open-drain and whether pin is logically inverted. - -Example of the node using GPIOs: - - node { - gpios = <&qe_pio_e 18 0>; - }; - -In this example gpio-specifier is "18 0" and encodes GPIO pin number, -and empty GPIO flags as accepted by the "qe_pio_e" gpio-controller. - -2) gpio-controller nodes ------------------------- - -Every GPIO controller node must have #gpio-cells property defined, -this information will be used to translate gpio-specifiers. - -Example of two SOC GPIO banks defined as gpio-controller nodes: - - qe_pio_a: gpio-controller@1400 { - #gpio-cells = <2>; - compatible = "fsl,qe-pario-bank-a", "fsl,qe-pario-bank"; - reg = <0x1400 0x18>; - gpio-controller; - }; - - qe_pio_e: gpio-controller@1460 { - #gpio-cells = <2>; - compatible = "fsl,qe-pario-bank-e", "fsl,qe-pario-bank"; - reg = <0x1460 0x18>; - gpio-controller; - }; - - |
