From: Rob Herring <robh@kernel.org>
To: Vivek Gautam <vivek.gautam@codeaurora.org>
Cc: joro@8bytes.org, robin.murphy@arm.com, mark.rutland@arm.com,
will.deacon@arm.com, m.szyprowski@samsung.com,
sboyd@codeaurora.org, robdclark@gmail.com,
iommu@lists.linux-foundation.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org,
linux-arm-msm@vger.kernel.org, sricharan@codeaurora.org,
stanimir.varbanov@linaro.org, architt@codeaurora.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH V4 6/6] iommu/arm-smmu: Add support for qcom,msm8996-smmu-v2 clocks
Date: Sun, 9 Jul 2017 22:40:57 -0500 [thread overview]
Message-ID: <20170710034057.o5tha22rlllbxu3y@rob-hp-laptop> (raw)
In-Reply-To: <1499333825-7658-7-git-send-email-vivek.gautam@codeaurora.org>
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";
> + };
next prev parent reply other threads:[~2017-07-10 3:41 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-06 9:36 [PATCH V4 0/6] iommu/arm-smmu: Add runtime pm/sleep support Vivek Gautam
2017-07-06 9:37 ` [PATCH V4 1/6] iommu/arm-smmu: Fix the error path in arm_smmu_add_device Vivek Gautam
2017-07-06 9:37 ` [PATCH V4 2/6] iommu/arm-smmu: Add pm_runtime/sleep ops Vivek Gautam
2017-07-12 22:58 ` Stephen Boyd
2017-07-12 23:01 ` Stephen Boyd
2017-07-13 3:57 ` Vivek Gautam
2017-07-06 9:37 ` [PATCH V4 3/6] iommu/arm-smmu: Invoke pm_runtime during probe, add/remove device Vivek Gautam
2017-07-12 22:54 ` Stephen Boyd
2017-07-13 5:13 ` Vivek Gautam
2017-07-13 5:35 ` Sricharan R
2017-07-13 11:50 ` Rob Clark
2017-07-13 12:02 ` Marek Szyprowski
2017-07-13 12:10 ` Rob Clark
2017-07-13 12:23 ` Marek Szyprowski
2017-07-13 13:53 ` Sricharan R
2017-07-13 14:55 ` Rob Clark
2017-07-14 17:07 ` Will Deacon
2017-07-14 17:42 ` Rob Clark
2017-07-14 18:06 ` Will Deacon
2017-07-14 18:25 ` Rob Clark
2017-07-14 19:01 ` Will Deacon
2017-07-14 19:34 ` Rob Clark
2017-07-14 19:36 ` Will Deacon
2017-07-14 19:39 ` Rob Clark
2017-07-17 11:46 ` Sricharan R
2017-07-17 12:28 ` Sricharan R
2017-07-24 15:31 ` Vivek Gautam
2017-08-02 9:53 ` [PATCH] iommu/arm-smmu: Defer TLB flush in case of unmap op Vivek Gautam
2017-08-02 12:17 ` Robin Murphy
2017-08-03 5:35 ` Vivek Gautam
2017-08-04 17:04 ` Robin Murphy
2017-08-07 7:44 ` Vivek Gautam
2017-08-07 8:27 ` [PATCH V4 3/6] iommu/arm-smmu: Invoke pm_runtime during probe, add/remove device Vivek Gautam
2017-08-07 12:29 ` Rob Clark
2017-11-14 18:30 ` Vivek Gautam
2017-11-27 22:22 ` Stephen Boyd
2017-11-27 23:43 ` Rob Clark
2017-11-28 13:43 ` Vivek Gautam
2017-11-28 20:05 ` Rob Clark
2017-07-13 13:57 ` Vivek Gautam
2017-07-13 14:01 ` Vivek Gautam
2017-07-13 6:48 ` Stephen Boyd
2017-07-13 9:50 ` Robin Murphy
2017-07-13 11:53 ` Rob Clark
2017-07-06 9:37 ` [PATCH V4 4/6] iommu/arm-smmu: Add the device_link between masters and smmu Vivek Gautam
2017-07-12 22:55 ` Stephen Boyd
2017-07-13 3:59 ` Vivek Gautam
2017-07-06 9:37 ` [PATCH V4 5/6] iommu/arm-smmu: Add support for MMU40x/500 clocks Vivek Gautam
2017-07-10 3:37 ` Rob Herring
2017-07-11 5:18 ` Vivek Gautam
2017-07-06 9:37 ` [PATCH V4 6/6] iommu/arm-smmu: Add support for qcom,msm8996-smmu-v2 clocks Vivek Gautam
2017-07-10 3:40 ` Rob Herring [this message]
2017-07-10 6:42 ` Vivek Gautam
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