ambiq-header
Vendor: Generic or vendor-independent
Description
GPIO pins exposed on Ambiq Apollo4p EVB headers
The Ambiq Apollo4p EVB layout provides 5x16 and 1x20 pin headers.
The binding provides a nexus mapping for these pins as depicted below.
J7 J12
VDD_MCU - VDD_MCU - GPIO22 22 GND -
VDD_EXT - VDD_EXT - GPIO23 23 GPIO24 24
nRST - GND - VDD_MCU - GND -
VDD_EXT - VDD_EXT - GND - GPIO64 64
VDD_5V - VDD_5V - GPIO61 61 GPIO65 65
GND - GND - GPIO63 63 GPIO66 66
GND - GPIO100 100 GPIO62 62 GPIO67 67
VDDH2 - GPIO97 97 GPIO47 47 GPIO68 68
GPIO49 49 GPIO69 69
J9 GPIO48 48 GPIO70 70
GPIO19 19 GPIO96 96 J11
GPIO18 18 GPIO95 95
GPIO17 17 GPIO98 98 GPIO53 53 GPIO71 71
GPIO16 16 GPIO99 99 GPIO52 52 GPIO72 72
GPIO15 15 GPIO102 102 GPIO91 91 GPIO73 73
GPIO14 14 GPIO34 34 GPIO90 90 GPIO93 93
GPIO13 13 GPIO35 35 GPIO11 11 GPIO92 92
GPIO12 12 GPIO36 36 GPIO10 10 GPIO33 33
GPIO8 8 GPIO32 32
GPIO9 9 GPIO31 31
J10
GPIO28 28 GPIO60 60
GPIO30 30 GPIO59 59
GPIO94 94 GPIO58 58
GPIO55 55 GPIO7 7
GPIO0 0 GPIO54 54
GPIO51 51 GPIO1 1
GPIO2 2 GPIO50 50
GPIO3 3 GPIO4 4
Voltage Header
VDD_EXT - VDD_5V -
GND - GND -
BIAS - BIAS -
GND - AUDA -
GND - GND -
D1P - DON -
D1N - DOP -
GND - GND -
Properties
Node specific properties
Properties not inherited from the base binding file.
Name |
Type |
Details |
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This property is required. |
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Number of items to expect in a GPIO specifier
This property is required. |
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 “ambiq-header” compatible.
Name |
Type |
Details |
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Indicates the operational status of the hardware or other
resource that the node represents. In particular:
- "okay" means the resource is operational and, for example,
can be used by device drivers
- "disabled" means the resource is not operational and the system
should treat it as if it is not present
For details, see "2.3.4 status" in Devicetree Specification v0.4.
Legal values: See Important properties for more information. |
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This property is a list of strings that essentially define what
type of hardware or other resource this devicetree node
represents. Each device driver checks for specific compatible
property values to find the devicetree nodes that represent
resources that the driver should manage.
The recommended format is "vendor,device", The "vendor" part is
an abbreviated name of the vendor. The "device" is usually from
the datasheet.
The compatible property can have multiple values, ordered from
most- to least-specific. Having additional values is useful when the
device is a specific instance of a more general family, to allow the
system to match the most specific driver available.
For details, see "2.3.1 compatible" in Devicetree Specification v0.4.
This property is required. See Important properties for more information. |
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Information used to address the device. The value is specific to
the device (i.e. is different depending on the compatible
property).
The "reg" property is typically a sequence of (address, length) pairs.
Each pair is called a "register block". Values are
conventionally written in hex.
For details, see "2.3.6 reg" in Devicetree Specification v0.4.
See Important properties for more information. |
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Optional names given to each register block in the "reg" property.
For example:
/ {
soc {
#address-cells = <1>;
#size-cells = <1>;
uart@1000 {
reg = <0x1000 0x2000>, <0x3000 0x4000>;
reg-names = "foo", "bar";
};
};
};
The uart@1000 node has two register blocks:
- one with base address 0x1000, size 0x2000, and name "foo"
- another with base address 0x3000, size 0x4000, and name "bar"
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Information about interrupts generated by the device, encoded as an array
of one or more interrupt specifiers. The format of the data in this property
varies by where the device appears in the interrupt tree. Devices with the same
"interrupt-parent" will use the same format in their interrupts properties.
For details, see "2.4 Interrupts and Interrupt Mapping" in
Devicetree Specification v0.4.
See Important properties for more information. |
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Extended interrupt specifier for device, used as an alternative to
the "interrupts" property.
For details, see "2.4 Interrupts and Interrupt Mapping" in
Devicetree Specification v0.4.
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Optional names given to each interrupt generated by a device.
The interrupts themselves are defined in either "interrupts" or
"interrupts-extended" properties.
For details, see "2.4 Interrupts and Interrupt Mapping" in
Devicetree Specification v0.4.
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If present, this refers to the node which handles interrupts generated
by this device.
For details, see "2.4 Interrupts and Interrupt Mapping" in
Devicetree Specification v0.4.
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Human readable string describing the device. Use of this property is
deprecated except as needed on a case-by-case basis.
For details, see "4.1.2 Miscellaneous Properties" in Devicetree
Specification v0.4.
See Important properties for more information. |
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Information about the device's clock providers. In general, this property
should follow conventions established in the dt-schema binding:
https://github.com/devicetree-org/dt-schema/blob/main/dtschema/schemas/clock/clock.yaml
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Optional names given to each clock provider in the "clocks" property.
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This property encodes the number of <u32> cells used by address fields
in "reg" properties in this node's children.
For details, see "2.3.5 #address-cells and #size-cells" in Devicetree
Specification v0.4.
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This property encodes the number of <u32> cells used by size fields in
"reg" properties in this node's children.
For details, see "2.3.5 #address-cells and #size-cells" in Devicetree
Specification v0.4.
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DMA channel specifiers relevant to the device.
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Optional names given to the DMA channel specifiers in the "dmas" property.
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IO channel specifiers relevant to the device.
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Optional names given to the IO channel specifiers in the "io-channels" property.
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Mailbox / IPM channel specifiers relevant to the device.
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Optional names given to the mbox specifiers in the "mboxes" property.
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Power domain specifiers relevant to the device.
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Optional names given to the power domain specifiers in the "power-domains" property.
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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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