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authorLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>2014-07-15 22:45:11 (GMT)
committerUlf Hansson <ulf.hansson@linaro.org>2014-07-26 09:38:19 (GMT)
commitb4c27763d749ab3a4dddfcfd44dc5af15bb91a0e (patch)
treed802d4373e1b9fd65571f28e8d427628bcd35819 /Documentation/devicetree/bindings/mmc
parent6b91f2d42ad5506f21f83e25ffd56f27981825a7 (diff)
mmc: sh_mmcif: Document DT bindings
The sh-mmcif driver implements DT support but the bindings are not documented. Document them. Cc: devicetree@vger.kernel.org Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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diff --git a/Documentation/devicetree/bindings/mmc/renesas,mmcif.txt b/Documentation/devicetree/bindings/mmc/renesas,mmcif.txt
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+* Renesas Multi Media Card Interface (MMCIF) Controller
+
+This file documents differences between the core properties in mmc.txt
+and the properties used by the MMCIF device.
+
+
+Required properties:
+
+- compatible: must contain one of the following
+ - "renesas,mmcif-r8a7740" for the MMCIF found in r8a7740 SoCs
+ - "renesas,mmcif-r8a7790" for the MMCIF found in r8a7790 SoCs
+ - "renesas,mmcif-r8a7791" for the MMCIF found in r8a7791 SoCs
+ - "renesas,sh-mmcif" for the generic MMCIF
+
+- clocks: reference to the functional clock
+
+- dmas: reference to the DMA channels, one per channel name listed in the
+ dma-names property.
+- dma-names: must contain "tx" for the transmit DMA channel and "rx" for the
+ receive DMA channel.
+
+
+Example: R8A7790 (R-Car H2) MMCIF0
+
+ mmcif0: mmc@ee200000 {
+ compatible = "renesas,mmcif-r8a7790", "renesas,sh-mmcif";
+ reg = <0 0xee200000 0 0x80>;
+ interrupts = <0 169 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&mstp3_clks R8A7790_CLK_MMCIF0>;
+ dmas = <&dmac0 0xd1>, <&dmac0 0xd2>;
+ dma-names = "tx", "rx";
+ };

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