Add support for AXI Multichannel Direct Memory Access (AXI MCDMA)
core, which is a soft Xilinx IP core that provides high-bandwidth
direct memory access between memory and AXI4-Stream target peripherals.
The AXI MCDMA core provides scatter-gather interface with multiple
independent transmit and receive channels. The driver supports
device_prep_slave_sg slave transfer mode.
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/1571763622-29281-7-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Extend dma_config structure to store irq routine handle. It enables runtime
handler selection based on xdma_ip_type and serves as preparatory patch for
adding MCDMA IP support.
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Suggested-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/1571763622-29281-6-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
The AXI DMA multichannel support is deprecated in the IP and it is no
longer actively supported. For multichannel support, refer to the AXI
multichannel direct memory access IP product guide(PG228) and MCDMA
driver. So inline with it remove axidma multichannel support from
from the driver.
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/1571763622-29281-5-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Whenever we reset the channel, we need to clear desc_pendingcount
along with desc_submitcount. Otherwise when a new transaction is
submitted, the irq coalesce level could be programmed to an incorrect
value in the axidma case.
This behavior can be observed when terminating pending transactions
with xilinx_dma_terminate_all() and then submitting new transactions
without releasing and requesting the channel.
Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/1571150904-3988-8-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
The driver should not run out of tx segments in normal operation. But,
if the user attempts to prepare a transaction with a large sg list,
the driver may not have enough free segments to accommodate the request.
Log a message at the debug level to inform the user in case they are
experiencing issues.
Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/1571150904-3988-7-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Take advantage of dmaengine_desc_get_callback_invoke which allows either
a callback or callback_result to be specified. This can be useful when
using the AXI DMA transfer unknown quantities of data where the residue
contained in the result can be used to calculate the number of bytes
transferred.
Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/1571150904-3988-6-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Introduce a function that can calculate residues for IPs that support it:
AXI DMA and CDMA.
Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/1571150904-3988-5-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
The dma api provides a single interface to get the appropriate callback
and invoke it directly. Prefer using it.
Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/1571150904-3988-3-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
In descriptor cleanup the call to desc_callback_valid can be safely
removed as both callback pointers i.e callback_result and callback
are anyway checked in invoke(). There is no much benefit in having
redundant checks.
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com>
Reviewed-by: Appana Durga Kedareswara rao <appana.durga.rao@xilinx.com>
Link: https://lore.kernel.org/r/1571150904-3988-2-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
In vdma_channel_set_config clear the delay, frame count and master mask
before updating their new values. It avoids programming incorrect state
when input parameters are different from default.
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Acked-by: Appana Durga Kedareswara rao <appana.durga.rao@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/1569495060-18117-3-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
In dma probe, the driver checks for devm_clk_get return and print error
message in the failing case. However for -EPROBE_DEFER this message is
confusing so avoid it.
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/1569495060-18117-5-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Replace the chain of platform_get_resource() and devm_ioremap_resource()
with devm_platform_ioremap_resource(). It simplifies the flow and there
is no functional change.
Fixes below cocinelle warning-
WARNING: Use devm_platform_ioremap_resource for xdev -> regs
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/1569495060-18117-4-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
- Add support in dmaengine core to do device node checks for DT devices and
update bunch of drivers to use that and remove open coding from drivers
- New driver/driver support for new hardware, namely:
- MediaTek UART APDMA
- Freescale i.mx7ulp edma2
- Synopsys eDMA IP core version 0
- Allwinner H6 DMA
- Updates to axi-dma and support for interleaved cyclic transfers
- Greg's debugfs return value check removals on drivers
- Updates to stm32-dma, hsu, dw, pl330, tegra drivers
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Merge tag 'dmaengine-5.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine updates from Vinod Koul:
- Add support in dmaengine core to do device node checks for DT devices
and update bunch of drivers to use that and remove open coding from
drivers
- New driver/driver support for new hardware, namely:
- MediaTek UART APDMA
- Freescale i.mx7ulp edma2
- Synopsys eDMA IP core version 0
- Allwinner H6 DMA
- Updates to axi-dma and support for interleaved cyclic transfers
- Greg's debugfs return value check removals on drivers
- Updates to stm32-dma, hsu, dw, pl330, tegra drivers
* tag 'dmaengine-5.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (68 commits)
dmaengine: Revert "dmaengine: fsl-edma: add i.mx7ulp edma2 version support"
dmaengine: at_xdmac: check for non-empty xfers_list before invoking callback
Documentation: dmaengine: clean up description of dmatest usage
dmaengine: tegra210-adma: remove PM_CLK dependency
dmaengine: fsl-edma: add i.mx7ulp edma2 version support
dt-bindings: dma: fsl-edma: add new i.mx7ulp-edma
dmaengine: fsl-edma-common: version check for v2 instead
dmaengine: fsl-edma-common: move dmamux register to another single function
dmaengine: fsl-edma: add drvdata for fsl-edma
dmaengine: Revert "dmaengine: fsl-edma: support little endian for edma driver"
dmaengine: rcar-dmac: Reject zero-length slave DMA requests
dmaengine: dw: Enable iDMA 32-bit on Intel Elkhart Lake
dmaengine: dw-edma: fix semicolon.cocci warnings
dmaengine: sh: usb-dmac: Use [] to denote a flexible array member
dmaengine: dmatest: timeout value of -1 should specify infinite wait
dmaengine: dw: Distinguish ->remove() between DW and iDMA 32-bit
dmaengine: fsl-edma: support little endian for edma driver
dmaengine: hsu: Revert "set HSU_CH_MTSR to memory width"
dmagengine: pl330: add code to get reset property
dt-bindings: pl330: document the optional resets property
...
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 3029 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We get a compiler warn about variable ‘tail_desc’ set but not used
drivers/dma/xilinx/xilinx_dma.c:1102:42: warning:
variable ‘tail_desc’ set but not used [-Wunused-but-set-variable]
struct xilinx_dma_tx_descriptor *desc, *tail_desc;
So remove it.
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Add SPDX license identifiers to all Make/Kconfig files which:
- Have no license information of any form
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:
GPL-2.0-only
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
- dmatest updates for modularizing common struct and code
- remove SG support for VDMA xilinx IP and updates to driver
- Update to dw driver to support Intel iDMA controllers
multi-block support
- tegra updates for proper reporting of residue
- Add Snow Ridge ioatdma device id and support for IOATDMA v3.4
- struct_size() usage and useless LIST_HEAD cleanups in subsystem.
- qDMA controller driver for Layerscape SoCs
- stm32-dma PM Runtime support
- And usual updates to imx-sdma, sprd, Documentation, fsl-edma,
bcm2835, qcom_hidma etc
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Merge tag 'dmaengine-5.1-rc1' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine updates from Vinod Koul:
- dmatest updates for modularizing common struct and code
- remove SG support for VDMA xilinx IP and updates to driver
- Update to dw driver to support Intel iDMA controllers multi-block
support
- tegra updates for proper reporting of residue
- Add Snow Ridge ioatdma device id and support for IOATDMA v3.4
- struct_size() usage and useless LIST_HEAD cleanups in subsystem.
- qDMA controller driver for Layerscape SoCs
- stm32-dma PM Runtime support
- And usual updates to imx-sdma, sprd, Documentation, fsl-edma,
bcm2835, qcom_hidma etc
* tag 'dmaengine-5.1-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (81 commits)
dmaengine: imx-sdma: fix consistent dma test failures
dmaengine: imx-sdma: add a test for imx8mq multi sdma devices
dmaengine: imx-sdma: add clock ratio 1:1 check
dmaengine: dmatest: move test data alloc & free into functions
dmaengine: dmatest: add short-hand `buf_size` var in dmatest_func()
dmaengine: dmatest: wrap src & dst data into a struct
dmaengine: ioatdma: support latency tolerance report (LTR) for v3.4
dmaengine: ioatdma: add descriptor pre-fetch support for v3.4
dmaengine: ioatdma: disable DCA enabling on IOATDMA v3.4
dmaengine: ioatdma: Add Snow Ridge ioatdma device id
dmaengine: sprd: Change channel id to slave id for DMA cell specifier
dt-bindings: dmaengine: sprd: Change channel id to slave id for DMA cell specifier
dmaengine: mv_xor: Use correct device for DMA API
Documentation :dmaengine: clarify DMA desc. pointer after submission
Documentation: dmaengine: fix dmatest.rst warning
dmaengine: k3dma: Add support for dma-channel-mask
dmaengine: k3dma: Delete axi_config
dmaengine: k3dma: Upgrade k3dma driver to support hisi_asp_dma hardware
Documentation: bindings: dma: Add binding for dma-channel-mask
Documentation: bindings: k3dma: Extend the k3dma driver binding to support hisi-asp
...
Fixes gcc '-Wunused-but-set-variable' warning:
drivers/dma/xilinx/xilinx_dma.c: In function 'xilinx_vdma_start_transfer':
drivers/dma/xilinx/xilinx_dma.c:1104:33: warning:
variable 'tail_segment' set but not used [-Wunused-but-set-variable]
It not used since commit b8349172b4 ("dmaengine: xilinx_dma: Drop SG support
for VDMA IP")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
We already need to zero out memory for dma_alloc_coherent(), as such
using dma_zalloc_coherent() is superflous. Phase it out.
This change was generated with the following Coccinelle SmPL patch:
@ replace_dma_zalloc_coherent @
expression dev, size, data, handle, flags;
@@
-dma_zalloc_coherent(dev, size, handle, flags)
+dma_alloc_coherent(dev, size, handle, flags)
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
[hch: re-ran the script on the latest tree]
Signed-off-by: Christoph Hellwig <hch@lst.de>
xilinx_vdma_start_transfer() is used only for VDMA IP, still it contains
conditional code on has_sg variable. has_sg is set only whenever the HW
does support SG mode, that is never true for VDMA IP.
This patch drops the never-taken branches.
Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
The AXIDMA and CDMA HW can be either direct-access or scatter-gather
version. These are SW incompatible.
The driver can handle both versions: a DT property was used to
tell the driver whether to assume the HW is in scatter-gather mode.
This patch makes the driver to autodetect this information. The DT
property is not required anymore.
No changes for VDMA.
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: devicetree@vger.kernel.org
Cc: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
AXI-DMA IP supports configurable (c_sg_length_width) buffer length
register width, hence read buffer length (xlnx,sg-length-width) DT
property and ensure that driver doesn't program buffer length
exceeding the supported limit. For VDMA and CDMA there is no change.
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: devicetree@vger.kernel.org
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Andrea Merello <andrea.merello@gmail.com> [rebase, reword]
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Whenever a single or cyclic transaction is prepared, the driver
could eventually split it over several SG descriptors in order
to deal with the HW maximum transfer length.
This could end up in DMA operations starting from a misaligned
address. This seems fatal for the HW if DRE (Data Realignment Engine)
is not enabled.
This patch eventually adjusts the transfer size in order to make sure
all operations start from an aligned address.
Cc: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This patch removes a bit of duplicated code by introducing a new
function that implements calculations for DMA copy size, and
prepares for changes to the copy size calculation that will
happen in following patches.
Suggested-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
All device_prep_dma_* functions and device_issue_pending can be called
from an interrupt context. As this includes hard IRQs, we must use
spin_lock_irqsave() instead of spin_lock_bh() to access chan->lock.
Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Clang warns:
drivers/dma/xilinx/zynqmp_dma.c:166:4: warning: attribute 'aligned' is
ignored, place it after "struct" to apply attribute to type declaration
[-Wignored-attributes]
}; __aligned(64)
^
./include/linux/compiler_types.h:200:38: note: expanded from macro
'__aligned'
^
1 warning generated.
As Nick pointed out in the previous version of this patch, the author
likely intended for this struct to be 8-byte (64-bit) aligned, not
64-byte, which is the default. Remove the hanging __aligned attribute.
Fixes: b0cc417c16 ("dmaengine: Add Xilinx zynqmp dma engine driver support")
Reported-by: Nick Desaulniers <ndesaulniers@google.com>
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This patch introduces the xilinx_prep_dma_addr_t macro which prepares
dma_addr_t from hardware buffer descriptor LSB and MSB fields. It will
be used in simple dma 64-bit programming sequence.
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Reviewed-by: Appana Durga Kedareswara Rao <appana.durga.rao@xilinx.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Vertical flip state is exported in xilinx_vdma_config and depending
on IP configuration(c_enable_vert_flip) vertical flip state is
programmed in hardware.
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This patch fixes the below sparse warning in the driver
drivers/dma/xilinx/xilinx_dma.c: In function ‘xilinx_vdma_dma_prep_interleaved’:
drivers/dma/xilinx/xilinx_dma.c:1614:43: warning: variable ‘prev’ set but not used [-Wunused-but-set-variable]
struct xilinx_vdma_tx_segment *segment, *prev = NULL;
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
If the hardware is configured for Scatter Gather(SG) mode,
and hardware is idle, in the control register SG mode bit
must be set to a 0 then back to 1 by the software, to force
the CDMA SG engine to use a new value written to the CURDESC_PNTR
register, failure to do so could result errors from the dmaengine.
This patch updates the same.
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
some typos is comments, so fix them up
/s/enusres/ensures
/s/descripotrs/descriptors
/s/Submited/Submitted
/s/pollling/polling
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This patch updates the probe banner info based on the ip probed.
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This patch fixes below.
ERROR: open brace '{' following function definitions go on the next line
+static int xilinx_dma_child_probe(struct xilinx_dma_device *xdev,
+ struct device_node *node) {
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This patch fixes the kernel doc warnings
in the driver.
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
As per axi dmaengine spec the software must not move the tail pointer
to a location that has not been updated (next descriptor field of the
h/w descriptor should always point to a valid address).
When user submits multiple descriptors on the recv side, with the
current driver flow the last buffer descriptor next descriptor field
points to a invalid location, resulting the invalid data or errors from the
axidma dmaengine.
This patch fixes this issue by creating a buffer descritpor chain during
channel allocation itself and use those buffer descriptors for the
subsequent dma operations.
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
VDMA engine default frame buffer configuration is cirular mode.
in this mode dmaengine continuously circles through h/w configured fstore
frame buffers.
When vdma h/w is configured for more than one frame.
for example h/w is configured for n number of frames, user
submits less than n number of frames and triggered the dmaengine
using issue_pending API.
since the h/w (or) driver default configuraiton is circular mode
h/w tries to write/read from an invalid frame buffer resulting
errors from the vdma dmaengine.
This patch fixes this issue by enabling the park mode as
default mode configuration for frame buffers in s/w,
so that driver can handle all cases for "k" frames where n%k==0
(n is a multiple of k) by simply replicating the frame pointers.
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Add variable for checking channel idle state to ensure that dma
descriptor is not submitted when dmaengine is in progress.
This will avoid the polling for a bit in the status register to know
dma state in the driver hot path.
Reviewed-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Incase of interrupt property is not present,
Driver is trying to free an invalid irq,
This patch fixes it by adding a check before freeing the irq.
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This patch fixes the below issues.
--> Need to clear the channel data count register
when overflow interrupts occurs.
--> Reduce the log level from _info to _dbg when
overflow interrupt occurs.
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This patch fixes the below warning
drivers/dma/xilinx/zynqmp_dma.c: In function 'zynqmp_dma_handle_ovfl_int':
drivers/dma/xilinx/zynqmp_dma.c:522:6: warning: variable 'val' set but not used [-Wunused-but-set-variable]
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This patch fixes the below kernel doc warnings
drivers/dma/xilinx/zynqmp_dma.c:552: info: Scanning doc for
zynqmp_dma_device_config
drivers/dma/xilinx/zynqmp_dma.c:558: warning: No description found for
return value of 'zynqmp_dma_device_config'
drivers/dma/xilinx/zynqmp_dma.c:649: info: Scanning doc for
zynqmp_dma_free_descriptors
drivers/dma/xilinx/zynqmp_dma.c:653: warning: No description found for
parameter 'chan'
drivers/dma/xilinx/zynqmp_dma.c:653: warning: Excess function parameter
'dchan' description in 'zynqmp_dma_free_descriptors'
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This patch adds runtime pm support in the driver.
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Vinod Koul