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Message-Id: <20250917-rda8810pl-drivers-v1-21-9ca9184ca977@mainlining.org>
Date: Wed, 17 Sep 2025 03:25:18 +0700
From: Dang Huynh via B4 Relay <devnull+dang.huynh.mainlining.org@...nel.org>
To: Manivannan Sadhasivam <mani@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Linus Walleij <linus.walleij@...aro.org>,
Bartosz Golaszewski <brgl@...ev.pl>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>, Philipp Zabel <p.zabel@...gutronix.de>,
Sebastian Reichel <sre@...nel.org>, Vinod Koul <vkoul@...nel.org>,
Kees Cook <kees@...nel.org>, "Gustavo A. R. Silva" <gustavoars@...nel.org>,
Ulf Hansson <ulf.hansson@...aro.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-unisoc@...ts.infradead.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-gpio@...r.kernel.org, linux-rtc@...r.kernel.org,
linux-clk@...r.kernel.org, linux-pm@...r.kernel.org,
dmaengine@...r.kernel.org, linux-hardening@...r.kernel.org,
linux-mmc@...r.kernel.org, Dang Huynh <dang.huynh@...nlining.org>
Subject: [PATCH 21/25] dt-bindings: mmc: Add RDA SDMMC controller
From: Dang Huynh <dang.huynh@...nlining.org>
Add documentation describing the SD/MMC controller in RDA Micro
RDA8810PL SoC.
Signed-off-by: Dang Huynh <dang.huynh@...nlining.org>
---
Documentation/devicetree/bindings/mmc/rda,mmc.yaml | 91 ++++++++++++++++++++++
1 file changed, 91 insertions(+)
diff --git a/Documentation/devicetree/bindings/mmc/rda,mmc.yaml b/Documentation/devicetree/bindings/mmc/rda,mmc.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..dfdd9c6d3044061c342519e35e39c7751874bb03
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/rda,mmc.yaml
@@ -0,0 +1,91 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mmc/rda,mmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: RDA Micro SD/MMC Controller
+
+allOf:
+ - $ref: mmc-controller.yaml
+
+maintainers:
+ - Dang Huynh <dang.huynh@...nlining.org>
+
+properties:
+ compatible:
+ const: rda,8810pl-mmc
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ clock-names:
+ const: apb
+
+ resets:
+ maxItems: 1
+
+ dmas:
+ minItems: 2
+ maxItems: 2
+
+ dma-names:
+ items:
+ - const: tx
+ - const: rx
+
+ rda,mclk-adj:
+ $ref: /schemas/types.yaml#/definitions/uint8
+ description:
+ Some board need MCLK to be adjusted for the card to work.
+ If not present, MCLK will be handled by an external PCLK.
+ minimum: 0
+ maximum: 255
+
+ rda,mclk-inv:
+ $ref: /schemas/types.yaml#/definitions/flag
+ description:
+ Some board need MCLK to be inverted for the card to work.
+ If not present, MCLK is not inverted.
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+ - clock-names
+ - resets
+ - dmas
+ - dma-names
+ - vmmc-supply
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/clock/rda,8810pl-apclk.h>
+ #include <dt-bindings/dma/rda-ifc.h>
+ mmc1: mmc@...50000 {
+ compatible = "rda,8810pl-mmc";
+ reg = <0x20950000 0x1000>;
+ interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&ap_syscon CLK_APB2>;
+ clock-names = "apb";
+ resets = <&ap_syscon RST_APB2_SDMMC1>;
+ dmas = <&ifc IFC_SDMMC1_TX>, <&ifc IFC_SDMMC1_RX>;
+ dma-names = "tx", "rx";
+ vmmc-supply = <&vdd_sdmmc>;
+ rda,mclk-adj = /bits/ 8 <1>;
+ rda,mclk-inv;
+ status = "disabled";
+ };
+
+...
--
2.51.0
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