nxp,imx-usdhc
Vendor: NXP Semiconductors N.V.
Note
An implementation of a driver matching this compatible is available in drivers/sdhc/imx_usdhc.c.
Description
These nodes are “sd” bus nodes.
NXP imx USDHC controller
Properties
Node specific properties
Properties not inherited from the base binding file.
Name |
Type |
Details |
|---|---|---|
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Data timeout, as multiple of the SD clock. See DTOCV field of USDHC
Default value: |
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Number of words used as read watermark level in FIFO queue for USDHC
Default value: |
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Number of words used as write watermark level in FIFO queue for USDHC
Default value: |
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Max drive current in mA at 3.3V. A value of zero indicates no maximum
is specified by the driver.
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Power pin
This pin defaults to active high when consumed by the SD card. The
property value should ensure the flags properly describe the signal
that is presented to the driver.
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Detect pin
This pin defaults to active low when produced by the SD card. The
property value should ensure the flags properly describe the signal
that is presented to the driver.
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When the external SD card circuit does not support 1.8V, add this
property to disable 1.8v card voltage of SD card controller.
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Enable the host to detect an SD card via the DAT3 line of the SD card
connection. Requires the board to define a function to pull DAT3 low or
high using pullup/pulldown resistors.
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Use the host's internal card detect signal (USDHC_CD) to detect the SD
card. This signal is available as an alternative to card detect via GPIO,
and should be connected to the SD slot's detect pin if used.
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Max drive current in mA at 3.3V. A value of zero indicates no maximum
is specified by the driver.
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Max drive current in mA at 3.0V. A value of zero indicates no maximum
is specified by the driver.
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Max drive current in mA at 1.8V. A value of zero indicates no maximum
is specified by the driver.
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Maximum bus frequency for SD card. This should be the highest frequency
the SDHC is capable of negotiating with cards on the bus.
Default value: |
|
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Minimum bus frequency for SD card. This should be the frequency that
cards first will select when attached to the SDHC bus
Default value: |
|
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time in ms for SDHC to delay when toggling power to the SD card. This
delay gives the card time to power up or down fully
Default value: |
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The host controller supports HS200 at 1.8V
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The host controller supports HS400 at 1.8V
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Pin configuration/s for the first state. Content is specific to the
selected pin controller driver implementation.
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Pin configuration/s for the second state. See pinctrl-0.
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Pin configuration/s for the third state. See pinctrl-0.
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Pin configuration/s for the fourth state. See pinctrl-0.
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Pin configuration/s for the fifth state. See pinctrl-0.
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Names for the provided states. The number of names needs to match the
number of states.
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Deprecated node specific properties
Deprecated properties not inherited from the base binding file.
(None)
Base properties
Properties inherited from the base binding file, which defines common properties that may be set on many nodes. Not all of these may apply to the “nxp,imx-usdhc” compatible.
Name |
Type |
Details |
|---|---|---|
|
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register space
This property is required. See Important properties for more information. |
|
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Clock gate information
This property is required. |
|
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indicates the operational status of a device
Legal values: See Important properties for more information. |
|
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compatible strings
This property is required. See Important properties for more information. |
|
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name of each register space
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interrupts for device
See Important properties for more information. |
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extended interrupt specifier for device
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name of each interrupt
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phandle to interrupt controller node
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Human readable string describing the device (used as device_get_binding() argument)
See Important properties for more information. This property is deprecated. |
|
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name of each clock
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number of address cells in reg property
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number of size cells in reg property
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DMA channels specifiers
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Provided names of DMA channel specifiers
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IO channels specifiers
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Provided names of IO channel specifiers
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mailbox / IPM channels specifiers
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Provided names of mailbox / IPM channel specifiers
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Power domain specifiers
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Provided names of power domain specifiers
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Number of cells in power-domains property
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Do not initialize device automatically on boot. Device should be manually
initialized using device_init().
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Property to identify that a device can be used as wake up source.
When this property is provided a specific flag is set into the
device that tells the system that the device is capable of
wake up the system.
Wake up capable devices are disabled (interruptions will not wake up
the system) by default but they can be enabled at runtime if necessary.
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Automatically configure the device for runtime power management after the
init function runs.
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List of power states that will disable this device power.
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