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i2c: at91: update documentation for DT bindings

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add a new value "atmel,sama5d2-i2c" for the "compatible" property.
add a new optional property "atmel,fifo-size" to enable FIFO support when
available.
add missing optional properties "dmas" and "dma-names".

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Cyrille Pitchen 2015-06-09 18:22:16 +02:00 committed by Wolfram Sang
parent e84cf8f03f
commit 0ba82c9557
1 changed files with 28 additions and 2 deletions
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30
Documentation/devicetree/bindings/i2c/i2c-at91.txt
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@ -2,8 +2,8 @@ I2C for Atmel platforms
Required properties :
- compatible : Must be "atmel,at91rm9200-i2c", "atmel,at91sam9261-i2c",
"atmel,at91sam9260-i2c", "atmel,at91sam9g20-i2c", "atmel,at91sam9g10-i2c"
or "atmel,at91sam9x5-i2c"
"atmel,at91sam9260-i2c", "atmel,at91sam9g20-i2c", "atmel,at91sam9g10-i2c",
"atmel,at91sam9x5-i2c" or "atmel,sama5d2-i2c"
- reg: physical base address of the controller and length of memory mapped
region.
- interrupts: interrupt number to the cpu.
@ -13,6 +13,10 @@ Required properties :
Optional properties:
- clock-frequency: Desired I2C bus frequency in Hz, otherwise defaults to 100000
- dmas: A list of two dma specifiers, one for each entry in dma-names.
- dma-names: should contain "tx" and "rx".
- atmel,fifo-size: maximum number of data the RX and TX FIFOs can store for FIFO
capable I2C controllers.
- Child nodes conforming to i2c bus binding
Examples :
@ -32,3 +36,25 @@ i2c0: i2c@fff84000 {
pagesize = <128>;
}
}
i2c0: i2c@f8034600 {
compatible = "atmel,sama5d2-i2c";
reg = <0xf8034600 0x100>;
interrupts = <19 IRQ_TYPE_LEVEL_HIGH 7>;
dmas = <&dma0
(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1))
AT91_XDMAC_DT_PERID(11)>,
<&dma0
(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1))
AT91_XDMAC_DT_PERID(12)>;
dma-names = "tx", "rx";
#address-cells = <1>;
#size-cells = <0>;
clocks = <&flx0>;
atmel,fifo-size = <16>;
wm8731: wm8731@1a {
compatible = "wm8731";
reg = <0x1a>;
};
};