Re: [PATCH 1/3] dt-bindings: Add I2C bindings for mt65xx/mt81xx.
From: Matthias Brugger <matthias.bgg@gmail.com>
Date: 2014-10-30 12:38:26
Also in:
linux-arm-kernel, linux-i2c, lkml
2014-10-29 6:37 GMT+01:00 Xudong Chen [off-list ref]:
quoted hunk ↗ jump to hunk
Add devicetree bindings for Mediatek Soc I2C driver. Signed-off-by: Xudong Chen <redacted> --- .../devicetree/bindings/i2c/i2c-mt6577.txt | 37 ++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 Documentation/devicetree/bindings/i2c/i2c-mt6577.txtdiff --git a/Documentation/devicetree/bindings/i2c/i2c-mt6577.txt b/Documentation/devicetree/bindings/i2c/i2c-mt6577.txt new file mode 100644 index 0000000..b4012c8 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/i2c-mt6577.txt@@ -0,0 +1,37 @@ +* 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) "mtk,mt6577-i2c", for i2c compatible with mt6577 i2c.
Looking on the datasheet of mt6577 it does not seem that this driver is really compatible. I was not able to find the PATH_DIR register neither in the datasheet nor in the source code.
+ (b) "mtk,mt8127-i2c", for i2c compatible with mt8127 i2c.
+ (c) "mtk,mt8135-i2c", for i2c compatible with mt8135 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: clock name used in i2c driver probe
+
+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.
+ - mediatek,have-dcm: platform has DCM(hardware digital clock manager) property.
+ - mediatek,use-push-pull: IO 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 = <100000>;
+ mediatek,have-pmic;
+ clock-div = <16>;
+ clocks = <&i2c0_ck>, <&ap_dma_ck>;
+ clock-names = "main", "dma";
+ };
+
--
1.8.1.1.dirty-- motzblog.wordpress.com