On Wed, Dec 27, 2017 at 09:27:25AM -0700, Karthikeyan Ramasubramanian wrote:
> Add device tree binding support for GENI based UART Controller in the
> QUP Wrapper.
>
> Signed-off-by: Karthikeyan Ramasubramanian <kramasub@xxxxxxxxxxxxxx>
> Signed-off-by: Girish Mahadevan <girishm@xxxxxxxxxxxxxx>
> ---
> .../devicetree/bindings/serial/qcom,geni-uart.txt | 31 ++++++++++++++++++++++
> 1 file changed, 31 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/serial/qcom,geni-uart.txt
>
> diff --git a/Documentation/devicetree/bindings/serial/qcom,geni-uart.txt b/Documentation/devicetree/bindings/serial/qcom,geni-uart.txt
> new file mode 100644
> index 0000000..e60ec6a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/serial/qcom,geni-uart.txt
> @@ -0,0 +1,31 @@
> +Qualcomm Technologies Inc. GENI based Serial UART Controller driver
> +
> +This serial UART driver supports console use-cases. This driver is meant
> +only for Generic Interface (GENI) based Qualcomm Universal Peripheral (QUP)
> +cores and isn't backwards compatible.
> +
> +Required properties:
> +- compatible: should contain "qcom,geni-uart, qcom,geni-console"
Is console different programming model or just how you are using the
h/w? for the latter, drop it as we have stdout-path to select a console.
> +- reg: Should contain UART register location and length.
> +- interrupts: Should contain UART core interrupts.
> +- clocks: clocks needed for UART, includes the core and AHB clock.
> +- pinctrl-names/pinctrl-0/1: The GPIOs assigned to this core. The names
> + Should be "active" and "sleep" for the pin confuguration when core is active
> + or when entering sleep state.
> +- qcom,wrapper-core: Wrapper QUP core containing this UART controller.
> +
> +Example:
> +qup_uart11: qcom,qup_uart@0xa88000 {
Use generic node names and no '0x':
serial@a88000
> + compatible = "qcom,geni-uart";
> + reg = <0xa88000 0x7000>;
> + reg-names = "se_phys";
> + clock-names = "se-clk", "m-ahb", "s-ahb";
Not documented.
> + clocks = <&clock_gcc GCC_QUPV3_WRAP0_S0_CLK>,
> + <&clock_gcc GCC_QUPV3_WRAP_0_M_AHB_CLK>,
> + <&clock_gcc GCC_QUPV3_WRAP_0_S_AHB_CLK>;
> + pinctrl-names = "default", "sleep";
> + pinctrl-0 = <&qup_1_uart_3_active>;
> + pinctrl-1 = <&qup_1_uart_3_sleep>;
> + interrupts = <0 355 0>;
> + qcom,wrapper-core = <&qup_0>;
> +};
> --
> Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
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