diff options
author | Wenyou Yang <wenyou.yang@atmel.com> | 2016-07-20 17:16:28 +0800 |
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committer | Andreas Bießmann <andreas@biessmann.org> | 2016-08-15 22:58:04 +0200 |
commit | 256a3f2466be1e4212abff92df285fcb6cdff5eb (patch) | |
tree | 8b4bfb44a035b305a58dbc6da16beff71fd50e9e /doc/device-tree-bindings | |
parent | ac72e174f95ebce2e4a4e2165828223427b2a5f3 (diff) |
atmel: Bring in at91 pio4 device tree file and bindings
Bring in required device tree file and bindings from Linux.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Andreas Bießmann <andreas@biessmann.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'doc/device-tree-bindings')
-rw-r--r-- | doc/device-tree-bindings/pinctrl/atmel,at91-pio4-pinctrl.txt | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/pinctrl/atmel,at91-pio4-pinctrl.txt b/doc/device-tree-bindings/pinctrl/atmel,at91-pio4-pinctrl.txt new file mode 100644 index 0000000000..a1b559668f --- /dev/null +++ b/doc/device-tree-bindings/pinctrl/atmel,at91-pio4-pinctrl.txt @@ -0,0 +1,66 @@ +* Atmel PIO4 Controller + +The Atmel PIO4 controller is used to select the function of a pin and to +configure it. + +Required properties: +- compatible: "atmel,sama5d2-pinctrl". +- reg: base address and length of the PIO controller. + +Please refer to pinctrl-bindings.txt in this directory for details of the +common pinctrl bindings used by client devices. + +Subnode format +Each node (or subnode) will list the pins it needs and how to configured these +pins. + + node { + pinmux = <PIN_NUMBER_PINMUX>; + GENERIC_PINCONFIG; + }; + +Required properties: +- pinmux: integer array. Each integer represents a pin number plus mux and +ioset settings. Use the macros from boot/dts/<soc>-pinfunc.h file to get the +right representation of the pin. + +Optional properties: +- GENERIC_PINCONFIG: generic pinconfig options to use, bias-disable, +bias-pull-down, bias-pull-up, drive-open-drain, input-schmitt-enable, +input-debounce. + +Example: + +#include <sama5d2-pinfunc.h> + +... +{ + spi0: spi@f8000000 { + cs-gpios = <&pioA 17 0>, <0>, <0>, <0>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_spi0_default>; + status = "okay"; + + spi_flash@0 { + compatible = "spi-flash"; + reg = <0>; + spi-max-frequency = <50000000>; + }; + }; + + ... + + pioA: pinctrl@fc038000 { + compatible = "atmel,sama5d2-pinctrl"; + reg = <0xfc038000 0x600>; + + pinctrl_spi0_default: spi0_default { + pinmux = <PIN_PA14__SPI0_SPCK>, + <PIN_PA15__SPI0_MOSI>, + <PIN_PA16__SPI0_MISO>; + bias-disable; + }; + ... + }; +}; +... |