On 03/08/2013 06:52 AM, Laxman Dewangan wrote:
> NVIDIA's Tegra114 has 32 channels APB DMA controller. Add DT entry for
> APB DMA controllers and make it compatible with "nvidia,tegra114-apbdma".
> diff --git a/arch/arm/boot/dts/tegra114.dtsi b/arch/arm/boot/dts/tegra114.dtsi
> + apbdma: dma {
> + compatible = "nvidia,tegra114-apbdma";
So I know that the Tegra114 HW has a new channel-pause feature, which
the driver /can/ use. However, if the driver didn't know about that
feature, and continued to use the global-pause feature, would it still
work fine?
In other words, is the Tegra114 HW 100% backwards-compatible with the
Tegra30 HW, it's just that there are new features that SW could
optionally use?
If that is true, then we should also include "nvidia,tegra30-apbdma" in
the compatible value.
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