This is the documentation for the latest (main) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

nxp,imx-usdhc

Vendor: NXP Semiconductors

Description

NXP imx USDHC controller

Properties

Properties not inherited from the base binding file.

Name

Type

Details

data-timeout

int

Data timeout, as multiple of the SD clock. See DTOCV field of USDHC

Default value: 15

read-watermark

int

Number of words used as read watermark level in FIFO queue for USDHC

Default value: 128

write-watermark

int

Number of words used as write watermark level in FIFO queue for USDHC

Default value: 128

max_current_330

int

Max drive current in mA at 3.3V. A value of zero indicates no maximum
is specified by the driver.

pwr-gpios

phandle-array

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.

cd-gpios

phandle-array

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.

no-1-8-v

boolean

When the external SD card circuit does not support 1.8V, add this
property to disable 1.8v card voltage of SD card controller.

detect-dat3

boolean

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.

max-current-330

int

Max drive current in mA at 3.3V. A value of zero indicates no maximum
is specified by the driver.

max-current-300

int

Max drive current in mA at 3.0V. A value of zero indicates no maximum
is specified by the driver.

max-current-180

int

Max drive current in mA at 1.8V. A value of zero indicates no maximum
is specified by the driver.

max-bus-freq

int

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: 400000

min-bus-freq

int

Minimum bus frequency for SD card. This should be the frequency that
cards first will select when attached to the SDHC bus

Default value: 400000

power-delay-ms

int

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: 500

pinctrl-0

phandles

Pin configuration/s for the first state. Content is specific to the
selected pin controller driver implementation.

pinctrl-1

phandles

Pin configuration/s for the second state. See pinctrl-0.

pinctrl-2

phandles

Pin configuration/s for the third state. See pinctrl-0.

pinctrl-3

phandles

Pin configuration/s for the fourth state. See pinctrl-0.

pinctrl-4

phandles

Pin configuration/s for the fifth state. See pinctrl-0.

pinctrl-names

string-array

Names for the provided states. The number of names needs to match the
number of states.