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Message-Id: <20190730062316.32037-2-andrew@aj.id.au>
Date: Tue, 30 Jul 2019 15:53:15 +0930
From: Andrew Jeffery <andrew@...id.au>
To: linux-mmc@...r.kernel.org
Cc: Andrew Jeffery <andrew@...id.au>, ulf.hansson@...aro.org,
robh+dt@...nel.org, mark.rutland@....com, joel@....id.au,
adrian.hunter@...el.com, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
ryanchen.aspeed@...il.com
Subject: [PATCH v3 1/2] dt-bindings: mmc: Document Aspeed SD controller
The ASPEED SD/SDIO/eMMC controller exposes two slots implementing the
SDIO Host Specification v2.00, with 1 or 4 bit data buses, or an 8 bit
data bus if only a single slot is enabled.
Signed-off-by: Andrew Jeffery <andrew@...id.au>
---
v3:
* Fix compatible enums
* Add AST2600 compatibles
* Describe #address-cells / #size-cells
---
.../devicetree/bindings/mmc/aspeed,sdhci.yaml | 100 ++++++++++++++++++
1 file changed, 100 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mmc/aspeed,sdhci.yaml
diff --git a/Documentation/devicetree/bindings/mmc/aspeed,sdhci.yaml b/Documentation/devicetree/bindings/mmc/aspeed,sdhci.yaml
new file mode 100644
index 000000000000..dd2a00c59641
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/aspeed,sdhci.yaml
@@ -0,0 +1,100 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mmc/aspeed,sdhci.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ASPEED SD/SDIO/eMMC Controller
+
+maintainers:
+ - Andrew Jeffery <andrew@...id.au>
+ - Ryan Chen <ryanchen.aspeed@...il.com>
+
+description: |+
+ The ASPEED SD/SDIO/eMMC controller exposes two slots implementing the SDIO
+ Host Specification v2.00, with 1 or 4 bit data buses, or an 8 bit data bus if
+ only a single slot is enabled.
+
+ The two slots are supported by a common configuration area. As the SDHCIs for
+ the slots are dependent on the common configuration area, they are described
+ as child nodes.
+
+properties:
+ compatible:
+ enum:
+ - aspeed,ast2400-sd-controller
+ - aspeed,ast2500-sd-controller
+ - aspeed,ast2600-sd-controller
+ reg:
+ maxItems: 1
+ description: Common configuration registers
+ "#address-cells":
+ const: 1
+ "#size-cells":
+ const: 1
+ ranges: true
+ clocks:
+ maxItems: 1
+ description: The SD/SDIO controller clock gate
+
+patternProperties:
+ "^sdhci@[0-9a-f]+$":
+ type: object
+ properties:
+ compatible:
+ enum:
+ - aspeed,ast2400-sdhci
+ - aspeed,ast2500-sdhci
+ - aspeed,ast2600-sdhci
+ reg:
+ maxItems: 1
+ description: The SDHCI registers
+ clocks:
+ maxItems: 1
+ description: The SD bus clock
+ interrupts:
+ maxItems: 1
+ description: The SD interrupt shared between both slots
+ required:
+ - compatible
+ - reg
+ - clocks
+ - interrupts
+
+additionalProperties: false
+
+required:
+ - compatible
+ - reg
+ - "#address-cells"
+ - "#size-cells"
+ - ranges
+ - clocks
+
+examples:
+ - |
+ #include <dt-bindings/clock/aspeed-clock.h>
+ sdc@...40000 {
+ compatible = "aspeed,ast2500-sd-controller";
+ reg = <0x1e740000 0x100>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0 0x1e740000 0x10000>;
+ clocks = <&syscon ASPEED_CLK_GATE_SDCLK>;
+
+ sdhci0: sdhci@100 {
+ compatible = "aspeed,ast2500-sdhci";
+ reg = <0x100 0x100>;
+ interrupts = <26>;
+ sdhci,auto-cmd12;
+ clocks = <&syscon ASPEED_CLK_SDIO>;
+ };
+
+ sdhci1: sdhci@200 {
+ compatible = "aspeed,ast2500-sdhci";
+ reg = <0x200 0x100>;
+ interrupts = <26>;
+ sdhci,auto-cmd12;
+ clocks = <&syscon ASPEED_CLK_SDIO>;
+ };
+ };
--
2.20.1
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