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| -rw-r--r-- | Documentation/devicetree/bindings/mmc/samsung,s3cmci.txt | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/samsung,s3cmci.txt b/Documentation/devicetree/bindings/mmc/samsung,s3cmci.txt new file mode 100644 index 000000000..5f68feb9f --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/samsung,s3cmci.txt @@ -0,0 +1,42 @@ +* Samsung's S3C24XX MMC/SD/SDIO controller device tree bindings + +Samsung's S3C24XX MMC/SD/SDIO controller is used as a connectivity interface +with external MMC, SD and SDIO storage mediums. + +This file documents differences between the core mmc properties described by +mmc.txt and the properties used by the Samsung S3C24XX MMC/SD/SDIO controller +implementation. + +Required SoC Specific Properties: +- compatible: should be one of the following + - "samsung,s3c2410-sdi": for controllers compatible with s3c2410 + - "samsung,s3c2412-sdi": for controllers compatible with s3c2412 + - "samsung,s3c2440-sdi": for controllers compatible with s3c2440 +- reg: register location and length +- interrupts: mmc controller interrupt +- clocks: Should reference the controller clock +- clock-names: Should contain "sdi" + +Required Board Specific Properties: +- pinctrl-0: Should specify pin control groups used for this controller. +- pinctrl-names: Should contain only one value - "default". + +Optional Properties: +- bus-width: number of data lines (see mmc.txt) +- cd-gpios: gpio for card detection (see mmc.txt) +- wp-gpios: gpio for write protection (see mmc.txt) + +Example: + + mmc0: mmc@5a000000 { + compatible = "samsung,s3c2440-sdi"; + pinctrl-names = "default"; + pinctrl-0 = <&sdi_pins>; + reg = <0x5a000000 0x100000>; + interrupts = <0 0 21 3>; + clocks = <&clocks PCLK_SDI>; + clock-names = "sdi"; + bus-width = <4>; + cd-gpios = <&gpg 8 GPIO_ACTIVE_LOW>; + wp-gpios = <&gph 8 GPIO_ACTIVE_LOW>; + }; |