Update ASPEED I2C maintainers email. Add ast2600-i2cv2 compatible and aspeed,global-regs, aspeed,enable-dma and description for ast2600-i2cv2. Signed-off-by: Ryan Chen <ryan_chen@xxxxxxxxxxxxxx> --- .../devicetree/bindings/i2c/aspeed,i2c.yaml | 56 +++++++++++++++++-- 1 file changed, 52 insertions(+), 4 deletions(-) diff --git a/Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml b/Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml index f597f73ccd87..00b92c97f432 100644 --- a/Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml +++ b/Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml @@ -7,10 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml# title: ASPEED I2C on the AST24XX, AST25XX, and AST26XX SoCs Device Tree Bindings maintainers: - - Rayn Chen <rayn_chen@xxxxxxxxxxxxxx> - -allOf: - - $ref: /schemas/i2c/i2c-controller.yaml# + - Ryan Chen <ryan_chen@xxxxxxxxxxxxxx> properties: compatible: @@ -49,6 +46,25 @@ properties: description: states that there is another master active on this bus + aspeed,enable-dma: + type: boolean + description: | + I2C bus enable dma mode transfer. + + ASPEED ast2600 platform equipped with 16 I2C controllers that share a + single DMA engine. DTS files can specify the data transfer mode to/from + the device, either DMA or programmed I/O. However, hardware limitations + may require a DTS to manually allocate which controller can use DMA mode. + The "aspeed,enable-dma" property allows control of this. + + In cases where one the hardware design results in a specific + controller handling a larger amount of data, a DTS would likely + enable DMA mode for that one controller. + + aspeed,global-regs: + $ref: /schemas/types.yaml#/definitions/phandle + description: The phandle of i2c global register node. + required: - reg - compatible @@ -57,6 +73,26 @@ required: unevaluatedProperties: false +allOf: + - $ref: /schemas/i2c/i2c-controller.yaml# + - if: + properties: + compatible: + contains: + const: aspeed,ast2600-i2cv2 + + then: + properties: + reg: + minItems: 2 + required: + - aspeed,global-regs + else: + properties: + aspeed,global-regs: false + aspeed,enable-dma: false + + examples: - | #include <dt-bindings/clock/aspeed-clock.h> @@ -71,3 +107,15 @@ examples: interrupts = <0>; interrupt-parent = <&i2c_ic>; }; + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + i2c1: i2c@80 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "aspeed,ast2600-i2cv2"; + reg = <0x80 0x80>, <0xc00 0x20>; + interrupts = <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>; + aspeed,global-regs = <&i2c_global>; + clocks = <&syscon ASPEED_CLK_APB>; + resets = <&syscon ASPEED_RESET_I2C>; + }; -- 2.34.1
