Re: [PATCH v5 2/2] DT: i2c: Add binding document for IMG I2C SCB
From: Andrew Bresticker <hidden>
Date: 2014-11-10 20:22:43
Also in:
linux-i2c
Hi Ezequiel, James, On Mon, Nov 10, 2014 at 11:30 AM, Ezequiel Garcia [off-list ref] wrote:
From: James Hogan <redacted> Introduce a devicetree binding for Imagination Technologies I2C SCB controller. Signed-off-by: James Hogan <redacted> Signed-off-by: Ezequiel Garcia <redacted>
quoted hunk
diff --git a/Documentation/devicetree/bindings/i2c/i2c-img-scb.txt b/Documentation/devicetree/bindings/i2c/i2c-img-scb.txt new file mode 100644 index 0000000..3a5cd1f --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/i2c-img-scb.txt@@ -0,0 +1,29 @@ +IMG Serial Control Bus (SCB) I2C Controller + +Required Properties: +- compatible: "img,scb-i2c" +- reg: Physical base address and length of controller registers +- interrupts: Interrupt number used by the controller +- clocks : Should contain a clock specifier for each entry in clock-names +- clock-names : Should contain the following entries: + "scb", for the SCB core clock. + "sys", for the system clock. +- clock-frequency: The I2C bus frequency in Hz +- #address-cells: Should be <1> +- #size-cells: Should be <0> + +Optional Properties +- img,bus-delay : Bus delay in ms, defaults to 0.
Maybe this is a dumb question, but what delay does this correspond to in hardware? In what situations would we use a non-zero value? Other than that, Reviewed-by: Andrew Bresticker <redacted>