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authorSergio Prado <sergio.prado@e-labworks.com>2017-03-31 20:50:55 -0300
committerUlf Hansson <ulf.hansson@linaro.org>2017-04-24 21:41:59 +0200
commitd5cc7c80bafca02e9150a2af5ccab1aa0aa8be20 (patch)
tree519d8b864374281f55f179dc697253fc187df052 /Documentation
parentc2c49a2e2bf3758ac429c5ac9941a855b75b5e22 (diff)
dt-bindings: mmc: add DT binding for S3C24XX MMC/SD/SDIO controller
Adds the device tree bindings description for Samsung S3C24XX MMC/SD/SDIO controller, used as a connectivity interface with external MMC, SD and SDIO storage mediums. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Sergio Prado <sergio.prado@e-labworks.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/mmc/samsung,s3cmci.txt42
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diff --git a/Documentation/devicetree/bindings/mmc/samsung,s3cmci.txt b/Documentation/devicetree/bindings/mmc/samsung,s3cmci.txt
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+* 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>;
+ };