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authorUlf Hansson <ulf.hansson@linaro.org>2014-03-19 11:55:35 (GMT)
committerUlf Hansson <ulf.hansson@linaro.org>2014-05-12 10:52:37 (GMT)
commitdc03294ac0b71ab110ad503ca18fc50f0eb15576 (patch)
treea5c2c3b7bf13a31bd4d9d38694bcaf8256dff077 /Documentation/devicetree/bindings/mmc
parentef289982f2cf9f36c64b3e64d584b74b6ea2e70b (diff)
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: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings/mmc')
-rw-r--r--Documentation/devicetree/bindings/mmc/mmci.txt39
1 files changed, 36 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/mmc/mmci.txt b/Documentation/devicetree/bindings/mmc/mmci.txt
index 2b584ca..ff233d1 100644
--- a/Documentation/devicetree/bindings/mmc/mmci.txt
+++ b/Documentation/devicetree/bindings/mmc/mmci.txt
@@ -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>;
+};

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