From: Laurent Pinchart Date: Tue, 15 Jul 2014 22:45:11 +0000 (+0200) Subject: mmc: sh_mmcif: Document DT bindings X-Git-Tag: firefly_0821_release~176^2~3398^2~10 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b4c27763d749ab3a4dddfcfd44dc5af15bb91a0e;p=firefly-linux-kernel-4.4.55.git 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 Signed-off-by: Ulf Hansson --- diff --git a/Documentation/devicetree/bindings/mmc/renesas,mmcif.txt b/Documentation/devicetree/bindings/mmc/renesas,mmcif.txt new file mode 100644 index 000000000000..299081f94abd --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/renesas,mmcif.txt @@ -0,0 +1,32 @@ +* 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"; + };