From: Yong Wu <yong.wu@mediatek.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
Rob Herring <robh+dt@kernel.org>,
Matthias Brugger <matthias.bgg@gmail.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>,
Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
"Tomasz Figa" <tfiga@chromium.org>,
<linux-mediatek@lists.infradead.org>,
<srv_heupstream@mediatek.com>, <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<iommu@lists.linux-foundation.org>, <yong.wu@mediatek.com>,
<youlin.pei@mediatek.com>, <anan.sun@mediatek.com>,
<ming-fan.chen@mediatek.com>, <yi.kuo@mediatek.com>,
<anthony.huang@mediatek.com>
Subject: [PATCH 2/9] dt-bindings: memory: mediatek: Add mt8195 smi sub common
Date: Wed, 16 Jun 2021 19:43:39 +0800 [thread overview]
Message-ID: <20210616114346.18812-3-yong.wu@mediatek.com> (raw)
In-Reply-To: <20210616114346.18812-1-yong.wu@mediatek.com>
This patch adds the binding for smi-sub-common. The SMI block diagram
like this:
IOMMU
| |
smi-common
------------------
| .... |
larb0 larb7 <-max is 8
The smi-common connects with smi-larb and IOMMU. The maximum larbs number
that connects with a smi-common is 8. If the engines number is over 8,
sometimes we use a smi-sub-common which is nearly same with smi-common.
It supports up to 8 input and 1 output(smi-common has 2 output)
Something like:
IOMMU
| |
smi-common
---------------------
| | ...
larb0 sub-common ... <-max is 8
-----------
| | ... <-max is 8 too.
larb2 larb5
We don't need extra SW setting for smi-sub-common, only the sub-common has
special clocks need to enable when the engines access dram.
If it is sub-common, it should have a "mediatek,smi" phandle to point to
its smi-common. also, the sub-common only has one gals clock.
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
.../mediatek,smi-common.yaml | 25 +++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
index 6317025bd203..11515afdfb2e 100644
--- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
+++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
@@ -38,6 +38,7 @@ properties:
- mediatek,mt8192-smi-common
- mediatek,mt8195-smi-common-vdo
- mediatek,mt8195-smi-common-vpp
+ - mediatek,mt8195-smi-sub-common
- description: for mt7623
items:
@@ -69,6 +70,10 @@ properties:
minItems: 2
maxItems: 4
+ mediatek,smi:
+ $ref: /schemas/types.yaml#/definitions/phandle-array
+ description: a phandle to the smi-common node above. Only for sub-common.
+
required:
- compatible
- reg
@@ -95,6 +100,26 @@ allOf:
- const: smi
- const: async
+ - if: # only for sub common
+ properties:
+ compatible:
+ contains:
+ enum:
+ - mediatek,mt8195-smi-sub-common
+ then:
+ required:
+ - mediatek,smi
+ properties:
+ clock:
+ items:
+ minItems: 3
+ maxItems: 3
+ clock-names:
+ items:
+ - const: apb
+ - const: smi
+ - const: gals0
+
- if: # for gen2 HW that have gals
properties:
compatible:
--
2.18.0
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next prev parent reply other threads:[~2021-06-16 11:46 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-16 11:43 [PATCH 0/9] MT8195 SMI support Yong Wu
2021-06-16 11:43 ` [PATCH 1/9] dt-bindings: memory: mediatek: Add mt8195 smi binding Yong Wu
2021-07-08 9:26 ` Krzysztof Kozlowski
2021-07-11 8:24 ` Yong Wu
2021-06-16 11:43 ` Yong Wu [this message]
2021-06-16 11:43 ` [PATCH 3/9] memory: mtk-smi: Use clk_bulk instead of the clk ops Yong Wu
2021-07-08 9:32 ` Krzysztof Kozlowski
2021-07-11 8:29 ` Yong Wu
2021-07-12 6:44 ` Krzysztof Kozlowski
2021-06-16 11:43 ` [PATCH 4/9] memory: mtk-smi: Rename smi_gen to smi_type Yong Wu
2021-07-08 9:34 ` Krzysztof Kozlowski
2021-07-11 8:24 ` Yong Wu
2021-06-16 11:43 ` [PATCH 5/9] memory: mtk-smi: Adjust some code position Yong Wu
2021-06-16 11:43 ` [PATCH 6/9] memory: mtk-smi: Add smi sub common support Yong Wu
2021-07-08 9:47 ` Krzysztof Kozlowski
2021-06-16 11:43 ` [PATCH 7/9] memory: mtk-smi: mt8195: Add smi support Yong Wu
2021-06-16 11:43 ` [PATCH 8/9] memory: mtk-smi: mt8195: Add initial setting for smi-common Yong Wu
2021-06-16 11:43 ` [PATCH 9/9] memory: mtk-smi: mt8195: Add initial setting for smi-larb Yong Wu
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