On Thu, Aug 29, 2019 at 12:11:54PM -0600, Lina Iyer wrote:
> In addition to configuring the PDC, additional registers that interface
> the GIC have to be configured to match the GPIO type. The registers on
> some QCOM SoCs are access restricted, while on other SoCs are not. They
> SoCs with access restriction to these SPI registers need to be written
Took me a minute to figure out this is GIC SPI interrupts, not SPI bus.
> from the firmware using the SCM interface. Add a flag to indicate if the
> register is to be written using SCM interface.
>
> Cc: devicetree@xxxxxxxxxxxxxxx
> Signed-off-by: Lina Iyer <ilina@xxxxxxxxxxxxxx>
> ---
> .../bindings/interrupt-controller/qcom,pdc.txt | 9 ++++++++-
> 1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/interrupt-controller/qcom,pdc.txt b/Documentation/devicetree/bindings/interrupt-controller/qcom,pdc.txt
> index 8e0797cb1487..852fcba98ea6 100644
> --- a/Documentation/devicetree/bindings/interrupt-controller/qcom,pdc.txt
> +++ b/Documentation/devicetree/bindings/interrupt-controller/qcom,pdc.txt
> @@ -50,15 +50,22 @@ Properties:
> The second element is the GIC hwirq number for the PDC port.
> The third element is the number of interrupts in sequence.
>
> +- qcom,scm-spi-cfg:
> + Usage: optional
> + Value type: <bool>
> + Definition: Specifies if the SPI configuration registers have to be
> + written from the firmware.
> +
> Example:
>
> pdc: interrupt-controller@b220000 {
> compatible = "qcom,sdm845-pdc";
> - reg = <0xb220000 0x30000>;
> + reg = <0xb220000 0x30000>, <0x179900f0 0x60>;
There needs to be a description for reg updated. These aren't GIC
registers are they? Because those go in the GIC node.
> qcom,pdc-ranges = <0 512 94>, <94 641 15>, <115 662 7>;
> #interrupt-cells = <2>;
> interrupt-parent = <&intc>;
> interrupt-controller;
> + qcom,scm-spi-cfg;
> };
>
> DT binding of a device that wants to use the GIC SPI 514 as a wakeup
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
