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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-10-22 19:31:08 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-10-22 19:31:08 -0300
commit670027c507e99521d416994a18a498def9ef2ea3 (patch)
tree74b4d761a9e7904a4f8aa4b58b2dc9801f22284d /Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/gpio.txt
parentd0b2f91bede3bd5e3d24dd6803e56eee959c1797 (diff)
Linux-libre 4.8.3-gnupck-4.8.3-gnu
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-Every GPIO controller node must have #gpio-cells property defined,
-this information will be used to translate gpio-specifiers.
-
-On CPM1 devices, all ports are using slightly different register layouts.
-Ports A, C and D are 16bit ports and Ports B and E are 32bit ports.
-
-On CPM2 devices, all ports are 32bit ports and use a common register layout.
-
-Required properties:
-- compatible : "fsl,cpm1-pario-bank-a", "fsl,cpm1-pario-bank-b",
- "fsl,cpm1-pario-bank-c", "fsl,cpm1-pario-bank-d",
- "fsl,cpm1-pario-bank-e", "fsl,cpm2-pario-bank"
-- #gpio-cells : Should be two. The first cell is the pin number and the
- second cell is used to specify optional parameters (currently unused).
-- gpio-controller : Marks the port as GPIO controller.
-
-Example of three SOC GPIO banks defined as gpio-controller nodes:
-
- CPM1_PIO_A: gpio-controller@950 {
- #gpio-cells = <2>;
- compatible = "fsl,cpm1-pario-bank-a";
- reg = <0x950 0x10>;
- gpio-controller;
- };
-
- CPM1_PIO_B: gpio-controller@ab8 {
- #gpio-cells = <2>;
- compatible = "fsl,cpm1-pario-bank-b";
- reg = <0xab8 0x10>;
- gpio-controller;
- };
-
- CPM1_PIO_E: gpio-controller@ac8 {
- #gpio-cells = <2>;
- compatible = "fsl,cpm1-pario-bank-e";
- reg = <0xac8 0x18>;
- gpio-controller;
- };