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. -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html