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@xxxxxxxx> --- .../bindings/mmc/sdhci-of-aspeed.yaml | 91 +++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 Documentation/devicetree/bindings/mmc/sdhci-of-aspeed.yaml diff --git a/Documentation/devicetree/bindings/mmc/sdhci-of-aspeed.yaml b/Documentation/devicetree/bindings/mmc/sdhci-of-aspeed.yaml new file mode 100644 index 000000000000..e98a2ac4d46d --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/sdhci-of-aspeed.yaml @@ -0,0 +1,91 @@ +# SPDX-License-Identifier: GPL-2.0-or-later +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mmc/sdhci-of-aspeed.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ASPEED SD/SDIO/eMMC Controller + +maintainers: + - Andrew Jeffery <andrew@xxxxxxxx> + - Ryan Chen <ryanchen.aspeed@xxxxxxxxx> + +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-sdc, aspeed,ast2500-sdc ] + reg: + description: Common configuration registers + ranges: true + clocks: + maxItems: 1 + description: The SD/SDIO controller clock gate + sdhci: + type: object + properties: + compatible: + allOf: + - enum: [ aspeed,ast2400-sdhci, aspeed,ast2500-sdhci ] + - const: sdhci + reg: + description: The SDHCI registers + clocks: + maxItems: 1 + description: The SD bus clock + slot: + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + - enum: [0, 1] + interrupts: + maxItems: 1 + description: The SD interrupt shared between both slots + required: + - compatible + - reg + - clocks + - slot + - interrupts + +required: + - compatible + - reg + - ranges + - clocks + +examples: + - | + #include <dt-bindings/clock/aspeed-clock.h> + sdc@1e740000 { + compatible = "aspeed,ast2500-sdc"; + reg = <0x1e740000 0x100>; + #address-cells = <1>; + #size-cells = <1>; + ranges; + clocks = <&syscon ASPEED_CLK_GATE_SDCLK>; + + sdhci0: sdhci@1e740100 { + compatible = "aspeed,ast2500-sdhci", "sdhci"; + reg = <0x1e740100 0x100>; + slot = <0>; + interrupts = <26>; + sdhci,auto-cmd12; + clocks = <&syscon ASPEED_CLK_SDIO>; + }; + + sdhci1: sdhci@1e740200 { + compatible = "aspeed,ast2500-sdhci", "sdhci"; + reg = <0x1e740200 0x100>; + slot = <1>; + interrupts = <26>; + sdhci,auto-cmd12; + clocks = <&syscon ASPEED_CLK_SDIO>; + }; + }; -- 2.20.1
