| Message ID | 1499333825-7658-7-git-send-email-vivek.gautam@codeaurora.org (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Stephen Boyd |
| Headers | show |
On Thu, Jul 06, 2017 at 03:07:05PM +0530, Vivek Gautam wrote: > qcom,msm8996-smmu-v2 is an arm,smmu-v2 implementation with > specific clock and power requirements. This smmu core is used > with multiple masters on msm8996, viz. mdss, video, etc. > Add bindings for the same. > > Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org> > --- > Documentation/devicetree/bindings/iommu/arm,smmu.txt | 18 ++++++++++++++++++ > drivers/iommu/arm-smmu.c | 13 +++++++++++++ > 2 files changed, 31 insertions(+) > > diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu.txt b/Documentation/devicetree/bindings/iommu/arm,smmu.txt > index 00331752d355..5d8e79775fae 100644 > --- a/Documentation/devicetree/bindings/iommu/arm,smmu.txt > +++ b/Documentation/devicetree/bindings/iommu/arm,smmu.txt > @@ -17,6 +17,7 @@ conditions. > "arm,mmu-401" > "arm,mmu-500" > "cavium,smmu-v2" > + "qcom,msm8996-smmu-v2" > > depending on the particular implementation and/or the > version of the architecture implemented. > @@ -74,11 +75,16 @@ conditions. > - clock-names: Should be "tcu" and "iface" for "arm,mmu-400", > "arm,mmu-401" and "arm,mmu-500" > > + Should be "bus", and "iface" for "qcom,msm8996-smmu-v2" > + implementation. > + > "tcu" clock is required for smmu's register access using the > programming interface and ptw for downstream bus access. This > clock is also used for access to the TBU connected to the > master locally. Sometimes however, TBU is clocked along with > the master. > + "bus" clock for "qcom,msm8996-smmu-v2" is requierd for downstream s/requierd/required/ > + bus access and for the smmu ptw. > > "iface" clock is required to access the TCU's programming > interface, apart from the "tcu" clock. > @@ -161,3 +167,15 @@ conditions. > iommu-map = <0 &smmu3 0 0x400>; > ... > }; > + > + /* Qcom's arm,smmu-v2 implementation for msm8996 */ > + smmu4: iommu { > + compatible = "qcom,msm8996-smmu-v2"; No registers? > + ... > + #iommu-cells = <1>; > + power-domains = <&mmcc MDSS_GDSC>; > + > + clocks = <&mmcc SMMU_MDP_AXI_CLK>, > + <&mmcc SMMU_MDP_AHB_CLK>; > + clock-names = "bus", "iface"; > + }; -- To unsubscribe from this list: send the line "unsubscribe linux-clk" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Rob, On Mon, Jul 10, 2017 at 9:10 AM, Rob Herring <robh@kernel.org> wrote: > On Thu, Jul 06, 2017 at 03:07:05PM +0530, Vivek Gautam wrote: >> qcom,msm8996-smmu-v2 is an arm,smmu-v2 implementation with >> specific clock and power requirements. This smmu core is used >> with multiple masters on msm8996, viz. mdss, video, etc. >> Add bindings for the same. >> >> Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org> >> --- >> Documentation/devicetree/bindings/iommu/arm,smmu.txt | 18 ++++++++++++++++++ >> drivers/iommu/arm-smmu.c | 13 +++++++++++++ >> 2 files changed, 31 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu.txt b/Documentation/devicetree/bindings/iommu/arm,smmu.txt >> index 00331752d355..5d8e79775fae 100644 >> --- a/Documentation/devicetree/bindings/iommu/arm,smmu.txt >> +++ b/Documentation/devicetree/bindings/iommu/arm,smmu.txt >> @@ -17,6 +17,7 @@ conditions. >> "arm,mmu-401" >> "arm,mmu-500" >> "cavium,smmu-v2" >> + "qcom,msm8996-smmu-v2" >> >> depending on the particular implementation and/or the >> version of the architecture implemented. >> @@ -74,11 +75,16 @@ conditions. >> - clock-names: Should be "tcu" and "iface" for "arm,mmu-400", >> "arm,mmu-401" and "arm,mmu-500" >> >> + Should be "bus", and "iface" for "qcom,msm8996-smmu-v2" >> + implementation. >> + >> "tcu" clock is required for smmu's register access using the >> programming interface and ptw for downstream bus access. This >> clock is also used for access to the TBU connected to the >> master locally. Sometimes however, TBU is clocked along with >> the master. >> + "bus" clock for "qcom,msm8996-smmu-v2" is requierd for downstream > > s/requierd/required/ sure, will correct it. > >> + bus access and for the smmu ptw. >> >> "iface" clock is required to access the TCU's programming >> interface, apart from the "tcu" clock. >> @@ -161,3 +167,15 @@ conditions. >> iommu-map = <0 &smmu3 0 0x400>; >> ... >> }; >> + >> + /* Qcom's arm,smmu-v2 implementation for msm8996 */ >> + smmu4: iommu { >> + compatible = "qcom,msm8996-smmu-v2"; > > No registers? It does have registers. Will add the complete binding example. Thank you for the review. Best Regards Vivek [snip]
diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu.txt b/Documentation/devicetree/bindings/iommu/arm,smmu.txt index 00331752d355..5d8e79775fae 100644 --- a/Documentation/devicetree/bindings/iommu/arm,smmu.txt +++ b/Documentation/devicetree/bindings/iommu/arm,smmu.txt @@ -17,6 +17,7 @@ conditions. "arm,mmu-401" "arm,mmu-500" "cavium,smmu-v2" + "qcom,msm8996-smmu-v2" depending on the particular implementation and/or the version of the architecture implemented. @@ -74,11 +75,16 @@ conditions. - clock-names: Should be "tcu" and "iface" for "arm,mmu-400", "arm,mmu-401" and "arm,mmu-500" + Should be "bus", and "iface" for "qcom,msm8996-smmu-v2" + implementation. + "tcu" clock is required for smmu's register access using the programming interface and ptw for downstream bus access. This clock is also used for access to the TBU connected to the master locally. Sometimes however, TBU is clocked along with the master. + "bus" clock for "qcom,msm8996-smmu-v2" is requierd for downstream + bus access and for the smmu ptw. "iface" clock is required to access the TCU's programming interface, apart from the "tcu" clock. @@ -161,3 +167,15 @@ conditions. iommu-map = <0 &smmu3 0 0x400>; ... }; + + /* Qcom's arm,smmu-v2 implementation for msm8996 */ + smmu4: iommu { + compatible = "qcom,msm8996-smmu-v2"; + ... + #iommu-cells = <1>; + power-domains = <&mmcc MDSS_GDSC>; + + clocks = <&mmcc SMMU_MDP_AXI_CLK>, + <&mmcc SMMU_MDP_AHB_CLK>; + clock-names = "bus", "iface"; + }; diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 7bb09280fa11..fe8e7fd61282 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -110,6 +110,7 @@ enum arm_smmu_implementation { GENERIC_SMMU, ARM_MMU500, CAVIUM_SMMUV2, + QCOM_MSM8996_SMMUV2, }; /* Until ACPICA headers cover IORT rev. C */ @@ -1960,6 +1961,17 @@ struct arm_smmu_match_data { .num_clks = ARRAY_SIZE(arm_mmu500_clks), }; +static const char * const qcom_msm8996_smmuv2_clks[] = { + "bus", "iface", +}; + +static const struct arm_smmu_match_data qcom_msm8996_smmuv2 = { + .version = ARM_SMMU_V2, + .model = QCOM_MSM8996_SMMUV2, + .clks = qcom_msm8996_smmuv2_clks, + .num_clks = ARRAY_SIZE(qcom_msm8996_smmuv2_clks), +}; + static const struct of_device_id arm_smmu_of_match[] = { { .compatible = "arm,smmu-v1", .data = &smmu_generic_v1 }, { .compatible = "arm,smmu-v2", .data = &smmu_generic_v2 }, @@ -1967,6 +1979,7 @@ struct arm_smmu_match_data { { .compatible = "arm,mmu-401", .data = &arm_mmu401 }, { .compatible = "arm,mmu-500", .data = &arm_mmu500 }, { .compatible = "cavium,smmu-v2", .data = &cavium_smmuv2 }, + { .compatible = "qcom,msm8996-smmu-v2", .data = &qcom_msm8996_smmuv2 }, { }, }; MODULE_DEVICE_TABLE(of, arm_smmu_of_match);
qcom,msm8996-smmu-v2 is an arm,smmu-v2 implementation with specific clock and power requirements. This smmu core is used with multiple masters on msm8996, viz. mdss, video, etc. Add bindings for the same. Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org> --- Documentation/devicetree/bindings/iommu/arm,smmu.txt | 18 ++++++++++++++++++ drivers/iommu/arm-smmu.c | 13 +++++++++++++ 2 files changed, 31 insertions(+)