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rohm,bd8lb600fs-gpio (on bd8lb600fs bus)

Vendor: ROHM Semiconductor Co., Ltd

Description

This is a representation of the Rohm BD8LB600FS SPI Gpio Expander.
Multiple instances may be daisy chained, which can be configured
via the number of supported GPIOs.

Properties

Top level properties

These property descriptions apply to “rohm,bd8lb600fs-gpio” nodes themselves. This page also describes child node properties in the following sections.

Node specific propertiesDeprecated node specific propertiesBase properties

Properties not inherited from the base binding file.

Name	Type	Details
gpio-controller	boolean	Convey's this node is a GPIO controller This property is required.
#gpio-cells	int	Number of items to expect in a GPIO specifier This property is required. Constant value: 2
ngpios	int	Number of pins for the expander. This must be a multiple of 8. The number of pins also defines how many devices are daisy chained. Set to 8 for one instance without daisy chaining. This property is required. Default value: 32 Legal values: 8, 16, 24, 32
gpio-reserved-ranges	array	If not all the GPIOs at offsets 0...N-1 are usable for ngpios = <N>, then this property contains an additional set of tuples which specify which GPIOs are unusable. This property indicates the start and size of the GPIOs that can't be used. For example, setting "gpio-reserved-ranges = <3 2>, <10 1>;" means that GPIO offsets 3, 4, and 10 are not usable, even if ngpios = <18>.
gpio-line-names	string-array	This is an array of strings defining the names of the GPIO lines going out of the GPIO controller

Child node properties

Name	Type	Details
gpio-hog	boolean	Conveys this node is a GPIO hog. This property is required.
gpios	array	This is an array of GPIO specifiers (e.g. pin, flags) to be hogged. The number of array entries must be an integer multiple of the number of GPIO specifier cells for the parent GPIO controller. This property is required.
input	boolean	If this property is set, the GPIO is configured as an input. This property takes precedence over the output-low and output-high properties.
output-low	boolean	If this property is set, the GPIO is configured as an output set to logical low. This property takes precedence over the output-high property.
output-high	boolean	If this property is set, the GPIO is configured as an output set to logical high.
line-name	string	Optional GPIO line name.

Specifier cell names

• gpio cells: pin, flags