diff options
| author | Andrey Makarov <ph.makarov@gmail.com> | 2022-07-16 14:32:10 +0300 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2022-07-18 13:25:13 +0100 |
| commit | 004c8a8bc569c8b18fca6fc90ffe3223daaf17b7 (patch) | |
| tree | fb0987e16733a9f93cf7561b9d30c27699096181 /include | |
| parent | 53ae2fdef1f5661cbaa2ea571c517f98e6041cb8 (diff) | |
Align Raspberry Pi DMA interrupts with Linux DTS
There is nothing in the specs on DMA engine interrupt lines: it should have
been in the "BCM2835 ARM Peripherals" datasheet but the appropriate
"ARM peripherals interrupt table" (p.113) is nearly empty.
All Raspberry Pi models 1-3 (based on bcm2835) have
Linux device tree (arch/arm/boot/dts/bcm2835-common.dtsi +25):
/* dma channel 11-14 share one irq */
This information is repeated in the driver code
(drivers/dma/bcm2835-dma.c +1344):
/*
* in case of channel >= 11
* use the 11th interrupt and that is shared
*/
In this patch channels 0--10 and 11--14 are handled separately.
Signed-off-by: Andrey Makarov <andrey.makarov@auriga.com>
Message-id: 20220716113210.349153-1-andrey.makarov@auriga.com
[PMM: fixed checkpatch nits]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/arm/bcm2835_peripherals.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/hw/arm/bcm2835_peripherals.h b/include/hw/arm/bcm2835_peripherals.h index d864879421..c9d25d493e 100644 --- a/include/hw/arm/bcm2835_peripherals.h +++ b/include/hw/arm/bcm2835_peripherals.h @@ -17,6 +17,7 @@ #include "hw/char/bcm2835_aux.h" #include "hw/display/bcm2835_fb.h" #include "hw/dma/bcm2835_dma.h" +#include "hw/or-irq.h" #include "hw/intc/bcm2835_ic.h" #include "hw/misc/bcm2835_property.h" #include "hw/misc/bcm2835_rng.h" @@ -55,6 +56,7 @@ struct BCM2835PeripheralState { BCM2835AuxState aux; BCM2835FBState fb; BCM2835DMAState dma; + qemu_or_irq orgated_dma_irq; BCM2835ICState ic; BCM2835PropertyState property; BCM2835RngState rng; |