| Message ID | 1445330724-129401-1-git-send-email-puck.chen@hisilicon.com |
|---|---|
| State | New |
| Headers | show |
On Tue, Oct 20, 2015 at 04:45:22PM +0800, Chen Feng wrote: > docs: iommu: Documentation for smmu in hi6220 SoC. > > Signed-off-by: Chen Feng <puck.chen@hisilicon.com> > Signed-off-by: Yu Dongbin <yudongbin@hisilicon.com> > --- > .../bindings/iommu/hisi,hi6220-iommu.txt | 52 ++++++++++++++++++++++ > 1 file changed, 52 insertions(+) > create mode 100644 Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt > > diff --git a/Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt b/Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt > new file mode 100644 > index 0000000..93e0701 > --- /dev/null > +++ b/Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt > @@ -0,0 +1,52 @@ > +Hi6220 SoC SMMU Device Driver devicetree document > +======================================================================= > +The Architecture of SMMU on Hi6220 SoC: > + > + +------------------------------------------------------------------+ > + | | > + | +---------+ +--------+ +-------------+ +-------+ | > + | | ADE | | ISP | | V/J codec | | G3D | | > + | +----|----+ +---|----+ +------|------+ +---|---| | > + | | | | | | > + | ---------v-----------v--------------v--------------v----- | > + | Media Bus | > + | --------------------------------|---------------|-------- | > + | | | | > + | +---v---------------v--------+ | > + | | SMMU | | > + | +----------|---------|-------+ | > + | | | | > + +--------------------------------------------|---------|-----------+ > + | | > + +------------v---------v-----------+ > + | DDRC | > + +----------------------------------+ > + > +Note: > +The media system shared the same smmu IP. to access DDR memory. And all Nit: s/IP./IP/ > +media IP used the same page table. > + > +Below binding describes the system mmu for media system in hi6220 platform > + > +Required properties: > +- compatible: Should be "hisilicon,hi6220-smmu" example: > + compatible = "hisilicon,hi6220-smmu"; No need for the example here. Just say: - compatible: should contain "hisilicon,hi6220-smmu". > +- reg: A tuple of base address and size of System MMU registers. > +- interrupts: An interrupt specifier for interrupt signal of System MMU. > +- clocks: The clock used for smmu IP. > +- clock-names: The name to enable clock with clock framework. The description of clocks and clock-names makes no sense. You must define the exact set of names you expect, and the relationship between clocks and clock names. e.g. - clocks: a list of phandle + clock-specifier pairs, one for each entry in clock-names - clock-names: should contain: * "smmu_clk" * "media_sc_clk" * "smmu_peri_clk" > +- #iommu-cells: The iommu-cells should be 1 for muti-master to use. s/muti/multi/ You must define what that one cell corresponds to in the hardware. Thanks, Mark. > + > +Examples: > + smmu@f4210000 { > + compatible = "hisilicon,hi6220-smmu"; > + reg = <0x0 0xf4210000 0x0 0x1000>; > + interrupts = <GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH>; > + clocks = <&sys_ctrl HI6220_MMU_CLK>, > + <&media_ctrl HI6220_MED_MMU>, > + <&sys_ctrl HI6220_MEDIA_PLL_SRC>; > + clock-names = "smmu_clk", > + "media_sc_clk", > + "smmu_peri_clk"; > + #iommu-cells = <1>; > + }; > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Mark, thanks very much. On 2015/10/20 18:34, Mark Rutland wrote: > On Tue, Oct 20, 2015 at 04:45:22PM +0800, Chen Feng wrote: >> docs: iommu: Documentation for smmu in hi6220 SoC. >> >> Signed-off-by: Chen Feng <puck.chen@hisilicon.com> >> Signed-off-by: Yu Dongbin <yudongbin@hisilicon.com> >> --- >> .../bindings/iommu/hisi,hi6220-iommu.txt | 52 ++++++++++++++++++++++ >> 1 file changed, 52 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt >> >> diff --git a/Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt b/Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt >> new file mode 100644 >> index 0000000..93e0701 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt >> @@ -0,0 +1,52 @@ >> +Hi6220 SoC SMMU Device Driver devicetree document >> +======================================================================= >> +The Architecture of SMMU on Hi6220 SoC: >> + >> + +------------------------------------------------------------------+ >> + | | >> + | +---------+ +--------+ +-------------+ +-------+ | >> + | | ADE | | ISP | | V/J codec | | G3D | | >> + | +----|----+ +---|----+ +------|------+ +---|---| | >> + | | | | | | >> + | ---------v-----------v--------------v--------------v----- | >> + | Media Bus | >> + | --------------------------------|---------------|-------- | >> + | | | | >> + | +---v---------------v--------+ | >> + | | SMMU | | >> + | +----------|---------|-------+ | >> + | | | | >> + +--------------------------------------------|---------|-----------+ >> + | | >> + +------------v---------v-----------+ >> + | DDRC | >> + +----------------------------------+ >> + >> +Note: >> +The media system shared the same smmu IP. to access DDR memory. And all > > Nit: s/IP./IP/ > >> +media IP used the same page table. >> + >> +Below binding describes the system mmu for media system in hi6220 platform >> + >> +Required properties: >> +- compatible: Should be "hisilicon,hi6220-smmu" example: >> + compatible = "hisilicon,hi6220-smmu"; > > No need for the example here. > > Just say: > > - compatible: should contain "hisilicon,hi6220-smmu". > ok, >> +- reg: A tuple of base address and size of System MMU registers. >> +- interrupts: An interrupt specifier for interrupt signal of System MMU. >> +- clocks: The clock used for smmu IP. >> +- clock-names: The name to enable clock with clock framework. > > The description of clocks and clock-names makes no sense. > > You must define the exact set of names you expect, and the relationship > between clocks and clock names. e.g. > ok > - clocks: a list of phandle + clock-specifier pairs, one for each entry > in clock-names > > - clock-names: should contain: > * "smmu_clk" > * "media_sc_clk" > * "smmu_peri_clk" > >> +- #iommu-cells: The iommu-cells should be 1 for muti-master to use. > > s/muti/multi/ > > You must define what that one cell corresponds to in the hardware. > > Thanks, > Mark. > I will change this next version. >> + >> +Examples: >> + smmu@f4210000 { >> + compatible = "hisilicon,hi6220-smmu"; >> + reg = <0x0 0xf4210000 0x0 0x1000>; >> + interrupts = <GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH>; >> + clocks = <&sys_ctrl HI6220_MMU_CLK>, >> + <&media_ctrl HI6220_MED_MMU>, >> + <&sys_ctrl HI6220_MEDIA_PLL_SRC>; >> + clock-names = "smmu_clk", >> + "media_sc_clk", >> + "smmu_peri_clk"; >> + #iommu-cells = <1>; >> + }; >> -- >> 1.9.1 >> > > . > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
On Tue, Oct 20, 2015 at 3:45 AM, Chen Feng <puck.chen@hisilicon.com> wrote: > docs: iommu: Documentation for smmu in hi6220 SoC. > > Signed-off-by: Chen Feng <puck.chen@hisilicon.com> > Signed-off-by: Yu Dongbin <yudongbin@hisilicon.com> > --- > .../bindings/iommu/hisi,hi6220-iommu.txt | 52 ++++++++++++++++++++++ > 1 file changed, 52 insertions(+) > create mode 100644 Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt > > diff --git a/Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt b/Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt > new file mode 100644 > index 0000000..93e0701 > --- /dev/null > +++ b/Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt > @@ -0,0 +1,52 @@ > +Hi6220 SoC SMMU Device Driver devicetree document > +======================================================================= > +The Architecture of SMMU on Hi6220 SoC: > + > + +------------------------------------------------------------------+ > + | | > + | +---------+ +--------+ +-------------+ +-------+ | > + | | ADE | | ISP | | V/J codec | | G3D | | > + | +----|----+ +---|----+ +------|------+ +---|---| | > + | | | | | | > + | ---------v-----------v--------------v--------------v----- | > + | Media Bus | > + | --------------------------------|---------------|-------- | > + | | | | > + | +---v---------------v--------+ | > + | | SMMU | | > + | +----------|---------|-------+ | > + | | | | > + +--------------------------------------------|---------|-----------+ > + | | > + +------------v---------v-----------+ > + | DDRC | > + +----------------------------------+ Nice diagram. > + > +Note: > +The media system shared the same smmu IP. to access DDR memory. And all > +media IP used the same page table. > + > +Below binding describes the system mmu for media system in hi6220 platform > + > +Required properties: > +- compatible: Should be "hisilicon,hi6220-smmu" example: > + compatible = "hisilicon,hi6220-smmu"; > +- reg: A tuple of base address and size of System MMU registers. > +- interrupts: An interrupt specifier for interrupt signal of System MMU. > +- clocks: The clock used for smmu IP. > +- clock-names: The name to enable clock with clock framework. > +- #iommu-cells: The iommu-cells should be 1 for muti-master to use. > + > +Examples: > + smmu@f4210000 { node name should be iommu. > + compatible = "hisilicon,hi6220-smmu"; > + reg = <0x0 0xf4210000 0x0 0x1000>; > + interrupts = <GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH>; > + clocks = <&sys_ctrl HI6220_MMU_CLK>, > + <&media_ctrl HI6220_MED_MMU>, > + <&sys_ctrl HI6220_MEDIA_PLL_SRC>; > + clock-names = "smmu_clk", > + "media_sc_clk", > + "smmu_peri_clk"; > + #iommu-cells = <1>; > + }; > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
diff --git a/Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt b/Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt new file mode 100644 index 0000000..93e0701 --- /dev/null +++ b/Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt @@ -0,0 +1,52 @@ +Hi6220 SoC SMMU Device Driver devicetree document +======================================================================= +The Architecture of SMMU on Hi6220 SoC: + + +------------------------------------------------------------------+ + | | + | +---------+ +--------+ +-------------+ +-------+ | + | | ADE | | ISP | | V/J codec | | G3D | | + | +----|----+ +---|----+ +------|------+ +---|---| | + | | | | | | + | ---------v-----------v--------------v--------------v----- | + | Media Bus | + | --------------------------------|---------------|-------- | + | | | | + | +---v---------------v--------+ | + | | SMMU | | + | +----------|---------|-------+ | + | | | | + +--------------------------------------------|---------|-----------+ + | | + +------------v---------v-----------+ + | DDRC | + +----------------------------------+ + +Note: +The media system shared the same smmu IP. to access DDR memory. And all +media IP used the same page table. + +Below binding describes the system mmu for media system in hi6220 platform + +Required properties: +- compatible: Should be "hisilicon,hi6220-smmu" example: + compatible = "hisilicon,hi6220-smmu"; +- reg: A tuple of base address and size of System MMU registers. +- interrupts: An interrupt specifier for interrupt signal of System MMU. +- clocks: The clock used for smmu IP. +- clock-names: The name to enable clock with clock framework. +- #iommu-cells: The iommu-cells should be 1 for muti-master to use. + +Examples: + smmu@f4210000 { + compatible = "hisilicon,hi6220-smmu"; + reg = <0x0 0xf4210000 0x0 0x1000>; + interrupts = <GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&sys_ctrl HI6220_MMU_CLK>, + <&media_ctrl HI6220_MED_MMU>, + <&sys_ctrl HI6220_MEDIA_PLL_SRC>; + clock-names = "smmu_clk", + "media_sc_clk", + "smmu_peri_clk"; + #iommu-cells = <1>; + };