semtech,sx1509b (on i2c bus)¶
Vendor: Semtech Corporation
Description¶
SX1509B GPIO node
Properties¶
Properties not inherited from the base binding file.
Name |
Type |
Details |
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Number of items to expect in a GPIO specifier
This property is required. Constant value: |
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This property indicates the number of in-use slots of available slots
for GPIOs. The typical example is something like this: the hardware
register is 32 bits wide, but only 18 of the bits have a physical
counterpart. The driver is generally written so that all 32 bits can
be used, but the IP block is reused in a lot of designs, some using
all 32 bits, some using 18 and some using 12. In this case, setting
"ngpios = <18>;" informs the driver that only the first 18 GPIOs, at
local offset 0 .. 17, are in use. For cases in which there might be
holes in the slot range, this value should be the max slot number-1.
This property is required. Default value: Constant value: |
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Connection for the NINT signal. This signal is active-low when
produced by sx1509b GPIO node.
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Bit mask identifying pins that should be initialized as outputs
driven low.
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Bit mask identifying pins that should be initialized as outputs
driven high.
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GPIO specifier that controls power to the device.
This property should be provided when the device has a dedicated
switch that controls power to the device. The supply state is
entirely the responsibility of the device driver.
Contrast with vin-supply.
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Reference to the regulator that controls power to the device.
The referenced devicetree node must have a regulator compatible.
This property should be provided when device power is supplied
by a shared regulator. The supply state is dependent on the
request status of all devices fed by the regulator.
Contrast with supply-gpios. If both properties are provided
then the regulator must be requested before the supply GPIOS is
set to an active state, and the supply GPIOS must be set to an
inactive state before releasing the regulator.
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Convey's this node is a GPIO controller
This property is required. |
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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>.
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This is an array of strings defining the names of the GPIO lines
going out of the GPIO controller
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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 “semtech,sx1509b” compatible.
Name |
Type |
Details |
|---|---|---|
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Human readable string describing the device (used as device_get_binding() argument)
This property is required. See Important properties for more information. |
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register space
This property is required. See Important properties for more information. |
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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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Clock gate information
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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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Specifier cell names¶
gpio cells: pin, flags