[PATCH 2/2] ARM: tegra: Enable PSCI support for Tegra210 and Tegra186

[Peter Robinson]

On Thu, Jun 18, 2020 at 12:56 PM Jon Hunter <jonathanh at nvidia.com> wrote:
>
> The PSCI nodes are currently not populated for the Tegra210 and Tegra186
> devices. This prevents the PSCI driver from being able to identify the
> PSCI method used by these devices and causes the probe of the PSCI
> driver to fail.
>
> Since commit 81ea00838c68 ("efi_loader: PSCI reset and shutdown") was
> added, which moves the PSCI EFI system reset handler into the PSCI
> driver, this has prevented the EFI system reset from working for
> Tegra210 and Tegra186. Therefore, populating these nodes is necessary
> to fix the EFI system reset for Tegra210 and Tegra186.
>
> Signed-off-by: Jon Hunter <jonathanh at nvidia.com>
Tested-by: Peter Robinson <pbrobinson at gmail.com>

Tested on the Jetson Nano and it now reboots as expected.
> ---
>  arch/arm/dts/tegra186.dtsi | 5 +++++
>  arch/arm/dts/tegra210.dtsi | 5 +++++
>  2 files changed, 10 insertions(+)
>
> diff --git a/arch/arm/dts/tegra186.dtsi b/arch/arm/dts/tegra186.dtsi
> index 0a9db9825b85..edcb7aacb8ee 100644
> --- a/arch/arm/dts/tegra186.dtsi
> +++ b/arch/arm/dts/tegra186.dtsi
> @@ -335,4 +335,9 @@
>                         status = "disabled";
>                 };
>         };
> +
> +       psci {
> +               compatible = "arm,psci-1.0";
> +               method = "smc";
> +       };
>  };
> diff --git a/arch/arm/dts/tegra210.dtsi b/arch/arm/dts/tegra210.dtsi
> index 3ec54b11c43f..a521a43d6cfd 100644
> --- a/arch/arm/dts/tegra210.dtsi
> +++ b/arch/arm/dts/tegra210.dtsi
> @@ -867,6 +867,11 @@
>                 };
>         };
>
> +       psci {
> +               compatible = "arm,psci-1.0";
> +               method = "smc";
> +       };
> +
>         timer {
>                 compatible = "arm,armv8-timer";
>                 interrupts = <GIC_PPI 13
> --
> 2.17.1
>