linux-kernel - [PATCH 1/3] dt-bindings: mmc: spacemit,sdhci: add reset support

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Message-Id: <20251221-07-k1-sdhci-reset-v1-1-6780af7fa6e7@gentoo.org>
Date: Sun, 21 Dec 2025 16:20:26 +0800
From: Yixun Lan <dlan@...too.org>
To: Ulf Hansson <ulf.hansson@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>, 
 Philipp Zabel <p.zabel@...gutronix.de>, Paul Walmsley <pjw@...nel.org>, 
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
 Alexandre Ghiti <alex@...ti.fr>
Cc: Iker Pedrosa <ikerpedrosam@...il.com>, linux-mmc@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org, 
 spacemit@...ts.linux.dev, linux-kernel@...r.kernel.org, 
 Yixun Lan <dlan@...too.org>
Subject: [PATCH 1/3] dt-bindings: mmc: spacemit,sdhci: add reset support

The SpacemiT SDHCI controller has two reset lines, one connect to AXI bus
which shared by all controllers, while another one connect to individual
controller separately.

Signed-off-by: Yixun Lan <dlan@...too.org>
---
 Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml b/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml
index 13d9382058fb..322c69b056f4 100644
--- a/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml
+++ b/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml
@@ -32,12 +32,24 @@ properties:
       - const: core
       - const: io
 
+  resets:
+    items:
+      - description: axi reset, connect to AXI bus, shared by all controllers
+      - description: sdh reset, connect to individual controller separately
+
+  reset-names:
+    items:
+      - const: axi
+      - const: sdh
+
 required:
   - compatible
   - reg
   - interrupts
   - clocks
   - clock-names
+  - resets
+  - reset-names
 
 unevaluatedProperties: false
 
@@ -50,4 +62,6 @@ examples:
       interrupt-parent = <&plic>;
       clocks = <&clk_apmu 10>, <&clk_apmu 13>;
       clock-names = "core", "io";
+      resets = <&syscon_apmu 2>, <&syscon_apmu 5>;
+      reset-names = "axi", "sdh";
     };

-- 
2.52.0