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| author | Stefano Babic <sbabic@denx.de> | 2015-10-30 14:52:51 +0100 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2015-10-30 14:52:51 +0100 |
| commit | e573bdb324c78fac56655a493bea843842c9d9f8 (patch) | |
| tree | 3933d354a6be71cbe66d583fec3f5b2479e596ee /doc/device-tree-bindings/gpio/altera_pio.txt | |
| parent | a69fdc7787bfa2f27eed74c2ee58c28ce932d502 (diff) | |
| parent | 0eb4cf9c14315e1976a116de75da6f420ac0e8dd (diff) | |
| download | u-boot-imx-e573bdb324c78fac56655a493bea843842c9d9f8.zip u-boot-imx-e573bdb324c78fac56655a493bea843842c9d9f8.tar.gz u-boot-imx-e573bdb324c78fac56655a493bea843842c9d9f8.tar.bz2 | |
Merge branch 'master' of git://git.denx.de/u-boot
Diffstat (limited to 'doc/device-tree-bindings/gpio/altera_pio.txt')
| -rw-r--r-- | doc/device-tree-bindings/gpio/altera_pio.txt | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/gpio/altera_pio.txt b/doc/device-tree-bindings/gpio/altera_pio.txt new file mode 100644 index 0000000..cf71eb2 --- /dev/null +++ b/doc/device-tree-bindings/gpio/altera_pio.txt @@ -0,0 +1,28 @@ +Altera GPIO controller bindings + +Required properties: +- compatible: + - "altr,pio-1.0" +- reg: Physical base address and length of the controller's registers. + +Optional properties: +- altr,gpio-bank-width: Width of the GPIO bank. This defines how many pins the + GPIO device has. Ranges between 1-32. Optional and defaults to 32 if not + specified. +- gpio-bank-name: bank name attached to this device. + +Example: + +user_led_pio_8out: gpio@0x4cc0 { + compatible = "altr,pio-1.0"; + reg = <0x00004cc0 0x00000010>; + resetvalue = <255>; + altr,gpio-bank-width = <8>; + #gpio-cells = <2>; + gpio-controller; + gpio-bank-name = "led"; +}; + +In this example, the gpio can be accessed as led[0..7] using gpio command of +u-boot. +==> gpio clear led0 |