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mmc: mmci: Update DT documentation

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

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Ulf Hansson
2014-03-19 12:55:35 +01:00
parent ef289982f2
commit dc03294ac0
1 changed files with 36 additions and 3 deletions
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39
Documentation/devicetree/bindings/mmc/mmci.txt
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@@ -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>;
};