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st,stm32-qspi-nor (on qspi bus)
Vendor: STMicroelectronics
Description
STM32 QSPI Flash controller supporting the JEDEC CFI interface
Representation of a serial flash on a quadspi bus:
mx25r6435f: qspi-nor-flash@0 {
compatible = "st,stm32-qspi-nor";
label = "MX25R6435F";
reg = <0>;
qspi-max-frequency = <80000000>;
size = <0x4000000>;
reset-gpios = <&gpiod 3 GPIO_ACTIVE_LOW>;
reset-gpios-duration = <1>;
spi-bus-width = <4>;
status = "okay";
};
Properties
Properties not inherited from the base binding file.
Name |
Type |
Details |
|---|---|---|
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Maximum clock frequency of device's QSPI interface in Hz
This property is required. |
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Flash Memory size in bits
This property is required. |
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RESETn pin
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The duration (in ms) for the flash memory reset pulse
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The width of (Q)SPI bus to which flash memory is connected. Now only value of 4 (when using SIO[0123]) is supported.
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The value encodes number of I/O lines used for the opcode,
address, and data.
There is no info about quad page program opcodes in the SFDP
tables, hence it has been assumed that NOR flash memory
supporting 1-4-4 mode also would support fast page programming.
If absent, then 1-4-4 program page is used in quad mode.
Legal values: |
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JEDEC ID as manufacturer ID, memory type, memory density
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Contains the 32-bit words in little-endian byte order from the
JESD216 Serial Flash Discoverable Parameters Basic Flash
Parameters table. This provides flash-specific configuration
information in cases were runtime retrieval of SFDP data
is not desired.
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Quad Enable Requirements value from JESD216 BFP DW15.
Use NONE if the device detects 1-1-4 and 1-4-4 modes by the
instruction. Use S1B6 if QE is bit 6 of the first status register
byte, and can be configured by reading then writing one byte with
RDSR and WRSR. For other fields see the specification.
Legal values: |
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Enter 4-Byte Addressing value from JESD216 BFP DW16
This property is ignored if the device is configured to use SFDP data
from the sfdp-bfp property (CONFIG_SPI_NOR_SFDP_DEVICETREE) or to read
SFDP properties at runtime (CONFIG_SPI_NOR_SFDP_RUNTIME).
For CONFIG_SPI_NOR_SFDP_MINIMAL this is the 8-bit value from bits 31:24
of DW16 identifying ways a device can be placed into 4-byte addressing
mode. If provided as a non-zero value the driver assumes that 4-byte
addressing is require to access the full address range, and
automatically puts the device into 4-byte address mode when the device
is initialized.
|
Deprecated properties not inherited from the base binding file.
(None)
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 “st,stm32-qspi-nor” compatible.
Name |
Type |
Details |
|---|---|---|
|
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register space
This property is required. See Important properties for more information. |
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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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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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mailbox / IPM channels specifiers
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Provided names of mailbox / IPM channel specifiers
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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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Power domain the device belongs to.
The device will be notified when the power domain it belongs to is either
suspended or resumed.
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