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| 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 /.github | |
| parent | 53ae2fdef1f5661cbaa2ea571c517f98e6041cb8 (diff) | |
| download | qemu-004c8a8bc569c8b18fca6fc90ffe3223daaf17b7.zip qemu-004c8a8bc569c8b18fca6fc90ffe3223daaf17b7.tar.gz qemu-004c8a8bc569c8b18fca6fc90ffe3223daaf17b7.tar.bz2 | |
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 '.github')
0 files changed, 0 insertions, 0 deletions