Patchwork [v3,1/2] i2c: qup: Add device tree bindings information

login
register
mail settings
Submitter Bjorn Andersson
Date Jan. 17, 2014, 11:03 p.m.
Message ID <1389999819-10648-2-git-send-email-bjorn.andersson@sonymobile.com>
Download mbox | patch
Permalink /patch/312216/
State Superseded
Headers show

Comments

Bjorn Andersson - Jan. 17, 2014, 11:03 p.m.
From: "Ivan T. Ivanov" <iivanov@mm-sol.com>

The Qualcomm Universal Peripherial (QUP) wraps I2C mini-core and
provide input and output FIFO's for it. I2C controller can operate
as master with supported bus speeds of 100Kbps and 400Kbps.

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
[bjorn: reformulated part of binding description and cleaned up example]
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
---
 .../devicetree/bindings/i2c/qcom,i2c-qup.txt       | 41 ++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt
Rob Herring - Jan. 20, 2014, 2:10 p.m.
On Fri, Jan 17, 2014 at 5:03 PM, Bjorn Andersson
<bjorn.andersson@sonymobile.com> wrote:
> From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
>
> The Qualcomm Universal Peripherial (QUP) wraps I2C mini-core and
> provide input and output FIFO's for it. I2C controller can operate
> as master with supported bus speeds of 100Kbps and 400Kbps.
>
> Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
> [bjorn: reformulated part of binding description and cleaned up example]
> Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
> ---

Patch history?

>  .../devicetree/bindings/i2c/qcom,i2c-qup.txt       | 41 ++++++++++++++++++++++
>  1 file changed, 41 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt
>
> diff --git a/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt b/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt
> new file mode 100644
> index 0000000..a99711b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt
> @@ -0,0 +1,41 @@
> +Qualcomm Universal Peripheral (QUP) I2C controller
> +
> +Required properties:
> + - compatible: Should be "qcom,i2c-qup".

Seems a bit generic. All versions of the IP are exactly the same?
"qcom,<chip>-i2c-qup" would be better.

> + - reg: Should contain QUP register address and length.
> + - interrupts: Should contain I2C interrupt.
> +
> + - clocks: Should contain the core clock and the AHB clock.
> + - clock-names: Should be "core" for the core clock and "iface" for the
> +                AHB clock.
> +
> + - #address-cells: Should be <1> Address cells for i2c device address
> + - #size-cells: Should be <0> as i2c addresses have no size component
> +
> +Optional properties:
> + - clock-frequency: Should specify the desired i2c bus clock frequency in Hz,
> +                    default is 100kHz if omitted.
> +
> +Child nodes should conform to i2c bus binding.
> +
> +Example:
> +
> + i2c2: i2c@f9924000 {
> +       compatible = "qcom,i2c-qup";
> +       reg = <0xf9924000 0x1000>;
> +       interrupts = <0 96 0>;
> +
> +       clocks = <&gcc_blsp1_qup2_i2c_apps_clk>, <&gcc_blsp1_ahb_clk>;
> +       clock-names = "core", "iface";
> +
> +       clock-frequency = <355000>;
> +
> +       #address-cells = <1>;
> +       #size-cells = <0>;
> +
> +       dummy@60 {
> +               compatible = "dummy";
> +               reg = <0x60>;
> +       };
> + };
> +
> --
> 1.8.2.2
>
> --
> To unsubscribe from this list: send the line "unsubscribe devicetree" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
--
To unsubscribe from this list: send the line "unsubscribe linux-i2c" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Patch

diff --git a/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt b/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt
new file mode 100644
index 0000000..a99711b
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt
@@ -0,0 +1,41 @@ 
+Qualcomm Universal Peripheral (QUP) I2C controller
+
+Required properties:
+ - compatible: Should be "qcom,i2c-qup".
+ - reg: Should contain QUP register address and length.
+ - interrupts: Should contain I2C interrupt.
+
+ - clocks: Should contain the core clock and the AHB clock.
+ - clock-names: Should be "core" for the core clock and "iface" for the
+                AHB clock.
+
+ - #address-cells: Should be <1> Address cells for i2c device address
+ - #size-cells: Should be <0> as i2c addresses have no size component
+
+Optional properties:
+ - clock-frequency: Should specify the desired i2c bus clock frequency in Hz,
+                    default is 100kHz if omitted.
+
+Child nodes should conform to i2c bus binding.
+
+Example:
+
+ i2c2: i2c@f9924000 {
+ 	compatible = "qcom,i2c-qup";
+ 	reg = <0xf9924000 0x1000>;
+ 	interrupts = <0 96 0>;
+
+ 	clocks = <&gcc_blsp1_qup2_i2c_apps_clk>, <&gcc_blsp1_ahb_clk>;
+ 	clock-names = "core", "iface";
+
+ 	clock-frequency = <355000>;
+
+ 	#address-cells = <1>;
+ 	#size-cells = <0>;
+
+ 	dummy@60 {
+ 		compatible = "dummy";
+ 		reg = <0x60>;
+ 	};
+ };
+