kernel@xxxxxxxxxxxxxxxx writes: > From: Martin Sperl <kernel@xxxxxxxxxxxxxxxx> > > The bcm2835 dma channel 11 to 14 only have a single shared irq line, > so this patch implements shared interrupts for these channels. > > To avoid changes to the device tree (with regards to interrupts listed, > which reflects on pdev->num_resources) a fixed channel count had > to get used in the code instead. > > With this patch applied we now have 11 dma channels available to > the ARM side of the SOC. > > Signed-off-by: Martin Sperl <kernel@xxxxxxxxxxxxxxxx> Particularly given the existing DT bindings we have, I actually think this is a good way to go. This is internal to the hardware module about how its features map to interrupt lines that leave the hardware module (which are exposed in DT appropriately). I thought about "what if we had the last interrupt line hooked up to a different interrupt handler that read out and decided which channels to wake up", but this seems much simpler. Reviewed-by: Eric Anholt <eric@xxxxxxxxxx>
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