kernel/include/linux/sa11x0-dma.h, branch linux-6.18.yHosts the 0x221E linux distro kernel.https://universe.0xinfinity.dev/distro/kernel/atom?h=linux-6.18.y2018-11-11T09:24:08Zdmaengine: sa11x0: unexport sa11x0_dma_filter_fn and clean up2018-11-11T09:24:08ZRussell Kingrmk+kernel@armlinux.org.uk2018-11-06T13:45:10Zurn:sha1:bc822e80170d672dd8ff0d07c521cf72f491cb6c
As we now have no users of sa11x0_dma_filter_fn() in the tree, we can
unexport this function, and remove the now unused header file.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
DMA: sa11x0: add SA-11x0 DMA driver2012-03-07T11:32:21ZRussell Kingrmk+kernel@arm.linux.org.uk2012-01-09T21:44:07Zurn:sha1:6365bead25efc84a4cf4aa9b0a7638f8a970cdff
Add support for the SA-11x0 DMA driver, which replaces the private
API version in arch/arm/mach-sa1100/dma.c.
We model this as a set of virtual DMA channels, one for each request
signal, and assign the virtual DMA channel to a physical DMA channel
when there is work to be done. This allows DMA users to claim their
channels, and hold them while not in use, without affecting the
availability of the physical channels.
Another advantage over this approach, compared to the private version,
is that a channel can be reconfigured on the fly without having to
release and re-request it - which for the IrDA driver, allows us to
use DMA for SIR mode transmit without eating up three physical
channels. As IrDA is half-duplex, we actually only need one physical
channel, and this architecture allows us to achieve that.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>