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| author |   Li Yu <liyu65@hisilicon.com> | 2019-01-24 12:24:20 -0800 |
|---|---|---|
| committer |   Vinod Koul <vkoul@kernel.org> | 2019-02-04 14:30:57 +0530 |
| commit | c4994a98faf2797d8977c0d075222962d71c4112 (patch) | |
| tree | 56dd85d250b901851e95ce411bf7eed54e191f29 /Documentation | |
| parent | dmaengine: k3dma: Delete axi_config (diff) | |
| download | linux-dev-c4994a98faf2797d8977c0d075222962d71c4112.tar.xz linux-dev-c4994a98faf2797d8977c0d075222962d71c4112.zip | |
dmaengine: k3dma: Add support for dma-channel-mask
Add dma-channel-mask as a property for k3dma, it defines
available dma channels which a non-secure mode driver can use.
One sample usage of this is in Hi3660 SoC. DMA channel 0 is
reserved to lpm3, which is a coprocessor for power management. So
as a result, any request in kernel (which runs on main processor
and in non-secure mode) should start from at least channel 1.
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Vinod Koul <vkoul@kernel.org>
Cc: Tanglei Han <hantanglei@huawei.com>
Cc: Zhuangluan Su <suzhuangluan@hisilicon.com>
Cc: Ryan Grachek <ryan@edited.us>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Guodong Xu <guodong.xu@linaro.org>
Cc: dmaengine@vger.kernel.org
Signed-off-by: Li Yu <liyu65@hisilicon.com>
[jstultz: Reworked to use a channel mask]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions