09.12.2021 20:33, Thierry Reding пишет:
> From: Thierry Reding <treding@xxxxxxxxxx>
>
> The TKE (time-keeping engine) found on Tegra30 and later is not
> backwards compatible with the version found on Tegra20, so update the
> compatible string list accordingly.
>
> Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
> ---
> arch/arm/boot/dts/tegra114.dtsi | 2 +-
> arch/arm/boot/dts/tegra124.dtsi | 2 +-
> arch/arm/boot/dts/tegra30.dtsi | 2 +-
> 3 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/boot/dts/tegra114.dtsi b/arch/arm/boot/dts/tegra114.dtsi
> index 546272e396b4..328425dba023 100644
> --- a/arch/arm/boot/dts/tegra114.dtsi
> +++ b/arch/arm/boot/dts/tegra114.dtsi
> @@ -164,7 +164,7 @@ lic: interrupt-controller@60004000 {
> };
>
> timer@60005000 {
> - compatible = "nvidia,tegra114-timer", "nvidia,tegra30-timer", "nvidia,tegra20-timer";
> + compatible = "nvidia,tegra114-timer", "nvidia,tegra30-timer";
> reg = <0x60005000 0x400>;
> interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>,
> <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>,
> diff --git a/arch/arm/boot/dts/tegra124.dtsi b/arch/arm/boot/dts/tegra124.dtsi
> index 63a64171b422..f4ac0c327c2e 100644
> --- a/arch/arm/boot/dts/tegra124.dtsi
> +++ b/arch/arm/boot/dts/tegra124.dtsi
> @@ -259,7 +259,7 @@ lic: interrupt-controller@60004000 {
> };
>
> timer@60005000 {
> - compatible = "nvidia,tegra124-timer", "nvidia,tegra30-timer", "nvidia,tegra20-timer";
> + compatible = "nvidia,tegra124-timer", "nvidia,tegra30-timer";
> reg = <0x0 0x60005000 0x0 0x400>;
> interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>,
> <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>,
> diff --git a/arch/arm/boot/dts/tegra30.dtsi b/arch/arm/boot/dts/tegra30.dtsi
> index ae3df73c20a7..4c04b9c28484 100644
> --- a/arch/arm/boot/dts/tegra30.dtsi
> +++ b/arch/arm/boot/dts/tegra30.dtsi
> @@ -342,7 +342,7 @@ lic: interrupt-controller@60004000 {
> };
>
> timer@60005000 {
> - compatible = "nvidia,tegra30-timer", "nvidia,tegra20-timer";
> + compatible = "nvidia,tegra30-timer";
> reg = <0x60005000 0x400>;
> interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>,
> <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>,
>
What exactly is incompatible? IIRC, T30+ is a superset of T20. This
patch should be wrong, also see [1].
[1]
https://elixir.bootlin.com/linux/v5.16-rc4/source/drivers/clocksource/timer-tegra.c#L404
