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Commit dc03294a authored by Ulf Hansson's avatar Ulf Hansson
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mmc: mmci: Update DT documentation 



Document how to configure the regulator supplies and add an example of
a typical mmci DT node.

Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent ef289982

Documentation/devicetree/bindings/mmc/mmci.txt

+36 −3
Original line number Diff line number Diff line
@@ -8,8 +8,41 @@ by mmc.txt and the properties used by the mmci driver. 


Required properties:

- compatible             : contains "arm,pl18x", "arm,primecell".

- arm,primecell-periphid : contains the PrimeCell Peripheral ID.

- vmmc-supply            : phandle to the regulator device tree node, mentioned

                           as the VCC/VDD supply in the eMMC/SD specs.



Optional properties:

- mmc-cap-mmc-highspeed  : indicates whether MMC is high speed capable

- mmc-cap-sd-highspeed   : indicates whether SD is high speed capable
 
- arm,primecell-periphid : contains the PrimeCell Peripheral ID, it overrides

                           the ID provided by the HW

- mmc-cap-mmc-highspeed  : indicates whether MMC is high speed capable.

- mmc-cap-sd-highspeed   : indicates whether SD is high speed capable.

- vqmmc-supply           : phandle to the regulator device tree node, mentioned

                           as the VCCQ/VDD_IO supply in the eMMC/SD specs.



Example:



sdi0_per1@80126000 {

	compatible = "arm,pl18x", "arm,primecell";

	reg = <0x80126000 0x1000>;

	interrupts = <0 60 IRQ_TYPE_LEVEL_HIGH>;



	dmas = <&dma 29 0 0x2>, /* Logical - DevToMem */

	       <&dma 29 0 0x0>; /* Logical - MemToDev */

	dma-names = "rx", "tx";



	clocks = <&prcc_kclk 1 5>, <&prcc_pclk 1 5>;

	clock-names = "sdi", "apb_pclk";



	max-frequency = <100000000>;

	bus-width = <4>;

	mmc-cap-sd-highspeed;

	mmc-cap-mmc-highspeed;

	cd-gpios  = <&gpio2 31 0x4>; // 95



	vmmc-supply = <&ab8500_ldo_aux3_reg>;

	vqmmc-supply = <&vmmci>;



	pinctrl-names = "default", "sleep";

	pinctrl-0 = <&sdi0_default_mode>;

	pinctrl-1 = <&sdi0_sleep_mode>;

};