linux-kernel - [PATCH v2 1/2] dt-bindings: mmc: sdhci-of-dwcmshc: Add Eswin EIC7700

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Message-ID: <20250912093713.142-1-hehuan1@eswincomputing.com>
Date: Fri, 12 Sep 2025 17:37:13 +0800
From: hehuan1@...incomputing.com
To: ulf.hansson@...aro.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	jszhang@...nel.org,
	adrian.hunter@...el.com,
	p.zabel@...gutronix.de,
	linux-mmc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: ningyu@...incomputing.com,
	linmin@...incomputing.com,
	pinkesh.vaghela@...fochips.com,
	xuxiang@...incomputing.com,
	luyulin@...incomputing.com,
	dongxuyang@...incomputing.com,
	zhangsenchuan@...incomputing.com,
	weishangjuan@...incomputing.com,
	lizhi2@...incomputing.com,
	caohang@...incomputing.com,
	hehuan1@...incomputing.com
Subject: [PATCH v2 1/2] dt-bindings: mmc: sdhci-of-dwcmshc: Add Eswin EIC7700

From: Huan He <hehuan1@...incomputing.com>

EIC7700 use Synopsys dwcmshc IP for SD/eMMC controllers.
Add Eswin EIC7700 support in sdhci-of-dwcmshc.yaml.

Signed-off-by: Huan He <hehuan1@...incomputing.com>
---
 .../bindings/mmc/snps,dwcmshc-sdhci.yaml      | 81 +++++++++++++++++--
 1 file changed, 75 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/mmc/snps,dwcmshc-sdhci.yaml b/Documentation/devicetree/bindings/mmc/snps,dwcmshc-sdhci.yaml
index f882219a0a26..e0f34bc28e0c 100644
--- a/Documentation/devicetree/bindings/mmc/snps,dwcmshc-sdhci.yaml
+++ b/Documentation/devicetree/bindings/mmc/snps,dwcmshc-sdhci.yaml
@@ -30,6 +30,7 @@ properties:
           - sophgo,sg2002-dwcmshc
           - sophgo,sg2042-dwcmshc
           - thead,th1520-dwcmshc
+          - eswin,eic7700-dwcmshc
 
   reg:
     maxItems: 1
@@ -52,17 +53,51 @@ properties:
     maxItems: 5
 
   reset-names:
-    items:
-      - const: core
-      - const: bus
-      - const: axi
-      - const: block
-      - const: timer
+    maxItems: 5
 
   rockchip,txclk-tapnum:
     description: Specify the number of delay for tx sampling.
     $ref: /schemas/types.yaml#/definitions/uint8
 
+  clock-output-names:
+    maxItems: 1
+    description:
+      The name of the clock output representing the card clock,
+      consumed by the PHY.
+
+  '#clock-cells':
+    enum: [0]
+    description:
+      Specifies how many cells are used when referencing the
+      exported clock from another node. This property indicates
+      that the clock output has no extra parameters and represents
+      the card clock.
+
+  eswin,hsp-sp-csr:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      - description: Phandle to HSP(High-Speed Peripheral) device
+      - description: Offset of the stability status register for
+                     internal clock
+      - description: Offset of the stability register for host
+                     regulator voltage.
+    description: |
+      High-Speed Peripheral device needed to configure internal
+      clocks, and the power.
+
+  eswin,syscrg-csr:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      - description: Phandle to system CRG(System Clock and Reset
+                     Generator) device
+      - description: Offset of core clock control register
+    description: |
+      System Clock and Reset Generator device needed to configure
+      core clock.
+
+  drive-impedance-ohm:
+    description: Specifies the drive impedance in Ohm.
+    enum: [33, 40, 50, 66, 100]
+
 required:
   - compatible
   - reg
@@ -110,6 +145,40 @@ allOf:
             - const: block
             - const: timer
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: eswin,eic7700-dwcmshc
+    then:
+      properties:
+        resets:
+          minItems: 4
+          maxItems: 4
+        reset-names:
+          items:
+            - const: arstn
+            - const: phy_rst
+            - const: prstn
+            - const: txrx_rst
+      required:
+        - clock-output-names
+        - '#clock-cells'
+        - eswin,hsp-sp-csr
+        - eswin,syscrg-csr
+        - drive-impedance-ohm
+    else:
+      properties:
+        resets:
+          maxItems: 5
+        reset-names:
+          items:
+            - const: core
+            - const: bus
+            - const: axi
+            - const: block
+            - const: timer
+
   - if:
       properties:
         compatible:
-- 
2.25.1