st,stm32-sdio

Vendor: STMicroelectronics

Note

An implementation of a driver matching this compatible is available in drivers/sdhc/sdhc_stm32.c.

Description

These nodes are “sd” bus nodes.

STM32 SDIO Host Controller

Common properties for STM32 SDIO Host Controller peripheral.

Properties

Properties not inherited from the base binding file.

Name

Type

Details

hw-flow-control

boolean

Set to enable RTS/CTS flow control at boot time.

sdhi-on-gpios

phandle-array

GPIO used to enable/disable the SDHI.

cd-gpios

phandle-array

Card detect pin.

pinctrl-0

phandles

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

This property is required.

pinctrl-names

string-array

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

This property is required.

support-1-8-v

boolean

When defined, it indicates that the external SDIO circuit supports 1.8V signaling.

bus-width

int

Bus width for SDMMC access, defaults to the minimum necessary
number of bus lines.

Default value: 1

Legal values: 1, 4, 8

clk-div

int

Clock division factor for SDMMC. Typically the clock operates at 25MHz so
a division factor of 2 would be 25MHz / 2 = 12.5MHz.
The valid range is 0 to 1023.

Default value: 1

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

mmc-hs200-1_8v

boolean

The host controller supports HS200 at 1.8V

mmc-hs400-1_8v

boolean

The host controller supports HS400 at 1.8V

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.

resets

phandle-array

Reset information

reset-names

string-array

Name of each reset