| Message ID | 20200529144054.4251-3-Sergey.Semin@baikalelectronics.ru (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | dmaengine: dw: Take Baikal-T1 SoC DW DMAC peculiarities into account | expand |
On Fri, 29 May 2020 17:40:45 +0300, Serge Semin wrote: > This array property is used to indicate the maximum burst transaction > length supported by each DMA channel. > > Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> > Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru> > Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> > Cc: Arnd Bergmann <arnd@arndb.de> > Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > Cc: linux-mips@vger.kernel.org > > --- > > Changelog v2: > - Rearrange SoBs. > - Move $ref to the root level of the properties. So do with the > constraints. > - Set default max-burst-len to 256 TR-WIDTH words. > > Changelog v3: > - Add more details into the property description about what limitations > snps,max-burst-len defines. > --- > .../bindings/dma/snps,dma-spear1340.yaml | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > Reviewed-by: Rob Herring <robh@kernel.org>
On 29-05-20, 17:40, Serge Semin wrote: > This array property is used to indicate the maximum burst transaction > length supported by each DMA channel. > > Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> > Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru> > Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> > Cc: Arnd Bergmann <arnd@arndb.de> > Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > Cc: linux-mips@vger.kernel.org > > --- > > Changelog v2: > - Rearrange SoBs. > - Move $ref to the root level of the properties. So do with the > constraints. > - Set default max-burst-len to 256 TR-WIDTH words. > > Changelog v3: > - Add more details into the property description about what limitations > snps,max-burst-len defines. > --- > .../bindings/dma/snps,dma-spear1340.yaml | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
diff --git a/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml b/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml index e7611840a7cf..20870f5c14dd 100644 --- a/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml +++ b/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml @@ -120,6 +120,21 @@ properties: enum: [0, 1] default: 1 + snps,max-burst-len: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: | + Maximum length of the burst transactions supported by the controller. + This property defines the upper limit of the run-time burst setting + (CTLx.SRC_MSIZE/CTLx.DST_MSIZE fields) so the allowed burst length + will be from 1 to max-burst-len words. It's an array property with one + cell per channel in the units determined by the value set in the + CTLx.SRC_TR_WIDTH/CTLx.DST_TR_WIDTH fields (data width). + items: + maxItems: 8 + items: + enum: [4, 8, 16, 32, 64, 128, 256] + default: 256 + snps,dma-protection-control: $ref: /schemas/types.yaml#definitions/uint32 description: |
This array property is used to indicate the maximum burst transaction length supported by each DMA channel. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: linux-mips@vger.kernel.org --- Changelog v2: - Rearrange SoBs. - Move $ref to the root level of the properties. So do with the constraints. - Set default max-burst-len to 256 TR-WIDTH words. Changelog v3: - Add more details into the property description about what limitations snps,max-burst-len defines. --- .../bindings/dma/snps,dma-spear1340.yaml | 15 +++++++++++++++ 1 file changed, 15 insertions(+)