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