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author | Anatolij Gustschin <agust@denx.de> | 2012-08-24 05:39:39 +0000 |
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committer | Anatolij Gustschin <agust@denx.de> | 2012-09-14 10:10:32 +0200 |
commit | 00e4b1975bbcd10445808cec0a3a1442e8deca53 (patch) | |
tree | fd966b7c3453a2d4a51aab505037c491ac003edf | |
parent | 56ebc06393e86cd3ffd66655c84df0146158d951 (diff) | |
download | linux-00e4b1975bbcd10445808cec0a3a1442e8deca53.tar.gz linux-00e4b1975bbcd10445808cec0a3a1442e8deca53.tar.bz2 linux-00e4b1975bbcd10445808cec0a3a1442e8deca53.zip |
dt/misc: add bindings documentation for ifm camera sensor interface
IFM O2D cameras use special sensor bus interface glue-logic to
connect camera sensors to mpc5200 LocalPlus bus. Add device tree
bindings documentation for it.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
-rw-r--r-- | Documentation/devicetree/bindings/misc/ifm-csi.txt | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/misc/ifm-csi.txt b/Documentation/devicetree/bindings/misc/ifm-csi.txt new file mode 100644 index 000000000000..5bdfffb0b9f7 --- /dev/null +++ b/Documentation/devicetree/bindings/misc/ifm-csi.txt @@ -0,0 +1,41 @@ +IFM camera sensor interface on mpc5200 LocalPlus bus + +Required properties: +- compatible: "ifm,o2d-csi" +- reg: specifies sensor chip select number and associated address range +- interrupts: external interrupt line number and interrupt sense mode + of the interrupt line signaling frame valid events +- gpios: three gpio-specifiers for "capture", "reset" and "master enable" + GPIOs (strictly in this order). +- ifm,csi-clk-handle: the phandle to a node in the DT describing the sensor + clock generator. This node is usually a general purpose timer controller. +- ifm,csi-addr-bus-width: address bus width (valid values are 16, 24, 25) +- ifm,csi-data-bus-width: data bus width (valid values are 8 and 16) +- ifm,csi-wait-cycles: sensor bus wait cycles + +Optional properties: +- ifm,csi-byte-swap: if this property is present, the byte swapping on + the bus will be enabled. + +Example: + + csi@3,0 { + compatible = "ifm,o2d-csi"; + reg = <3 0 0x00100000>; /* CS 3, 1 MiB range */ + interrupts = <1 1 2>; /* IRQ1, edge falling */ + + ifm,csi-clk-handle = <&timer7>; + gpios = <&gpio_simple 23 0 /* image_capture */ + &gpio_simple 26 0 /* image_reset */ + &gpio_simple 29 0>; /* image_master_en */ + + ifm,csi-addr-bus-width = <24>; + ifm,csi-data-bus-width = <8>; + ifm,csi-wait-cycles = <0>; + }; + +The base address of the used chip select is specified in the +ranges property of the parent localbus node, for example: + + ranges = <0 0 0xff000000 0x01000000 + 3 0 0xe3000000 0x00100000>; |