[deliverable/linux.git] / Documentation / devicetree / bindings / mmc / renesas,mmcif.txt

* 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.
- max-frequency: Maximum operating clock frequency, driver uses default clock
  frequency if it is not set.


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";
		max-frequency = <97500000>;
	};
Commit	Line	Data
b4c27763 LP	1	* Renesas Multi Media Card Interface (MMCIF) Controller
	2
	3	This file documents differences between the core properties in mmc.txt
	4	and the properties used by the MMCIF device.
	5
	6
	7	Required properties:
	8
	9	- compatible: must contain one of the following
	10	- "renesas,mmcif-r8a7740" for the MMCIF found in r8a7740 SoCs
	11	- "renesas,mmcif-r8a7790" for the MMCIF found in r8a7790 SoCs
	12	- "renesas,mmcif-r8a7791" for the MMCIF found in r8a7791 SoCs
	13	- "renesas,sh-mmcif" for the generic MMCIF
	14
	15	- clocks: reference to the functional clock
	16
	17	- dmas: reference to the DMA channels, one per channel name listed in the
	18	dma-names property.
	19	- dma-names: must contain "tx" for the transmit DMA channel and "rx" for the
	20	receive DMA channel.
89d49a70 KM	21	- max-frequency: Maximum operating clock frequency, driver uses default clock
89d49a70 KM	22	frequency if it is not set.
b4c27763 LP	23
	24
	25	Example: R8A7790 (R-Car H2) MMCIF0
	26
	27	mmcif0: mmc@ee200000 {
	28	compatible = "renesas,mmcif-r8a7790", "renesas,sh-mmcif";
	29	reg = <0 0xee200000 0 0x80>;
	30	interrupts = <0 169 IRQ_TYPE_LEVEL_HIGH>;
	31	clocks = <&mstp3_clks R8A7790_CLK_MMCIF0>;
	32	dmas = <&dmac0 0xd1>, <&dmac0 0xd2>;
	33	dma-names = "tx", "rx";
89d49a70	34	max-frequency = <97500000>;
b4c27763	35	};