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- From d1447a6815913823ef5e75d70efc6f08f288ee40 Mon Sep 17 00:00:00 2001
- From: Xudong Chen <[email protected]>
- Date: Wed, 6 May 2015 16:37:05 +0800
- Subject: [PATCH 29/76] dt-bindings: Add I2C bindings for mt65xx/mt81xx.
- Add devicetree bindings for Mediatek Soc I2C driver.
- Signed-off-by: Xudong Chen <[email protected]>
- Signed-off-by: Eddie Huang <[email protected]>
- ---
- .../devicetree/bindings/i2c/i2c-mt6577.txt | 41 ++++++++++++++++++++
- 1 file changed, 41 insertions(+)
- create mode 100644 Documentation/devicetree/bindings/i2c/i2c-mt6577.txt
- --- /dev/null
- +++ b/Documentation/devicetree/bindings/i2c/i2c-mt6577.txt
- @@ -0,0 +1,41 @@
- +* Mediatek's I2C controller
- +
- +The Mediatek's I2C controller is used to interface with I2C devices.
- +
- +Required properties:
- + - compatible: value should be either of the following.
- + (a) "mediatek,mt6577-i2c", for i2c compatible with mt6577 i2c.
- + (b) "mediatek,mt6589-i2c", for i2c compatible with mt6589 i2c.
- + (c) "mediatek,mt8127-i2c", for i2c compatible with mt8127 i2c.
- + (d) "mediatek,mt8135-i2c", for i2c compatible with mt8135 i2c.
- + (e) "mediatek,mt8173-i2c", for i2c compatible with mt8173 i2c.
- + - reg: physical base address of the controller and dma base, length of memory
- + mapped region.
- + - interrupts: interrupt number to the cpu.
- + - clock-div: the fixed value for frequency divider of clock source in i2c
- + module. Each IC may be different.
- + - clocks: clock name from clock manager
- + - clock-names: Must include "main" and "dma", if enable have-pmic need include
- + "pmic" extra.
- +
- +Optional properties:
- + - clock-frequency: Frequency in Hz of the bus when transfer, the default value
- + is 100000.
- + - mediatek,have-pmic: platform can control i2c form special pmic side.
- + Only mt6589 and mt8135 support this feature.
- + - mediatek,use-push-pull: IO config use push-pull mode.
- +
- +Example:
- +
- + i2c0: i2c@1100d000 {
- + compatible = "mediatek,mt6577-i2c";
- + reg = <0x1100d000 0x70>,
- + <0x11000300 0x80>;
- + interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_LOW>;
- + clock-frequency = <400000>;
- + mediatek,have-pmic;
- + clock-div = <16>;
- + clocks = <&i2c0_ck>, <&ap_dma_ck>;
- + clock-names = "main", "dma";
- + };
- +
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