91 lines
2.9 KiB
Plaintext
91 lines
2.9 KiB
Plaintext
# Copyright (c) 2018 Savoir-Faire Linux.
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# SPDX-License-Identifier: Apache-2.0
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menuconfig SPI_NOR
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bool "SPI NOR Flash"
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default y
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depends on DT_HAS_JEDEC_SPI_NOR_ENABLED
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select FLASH_HAS_DRIVER_ENABLED
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select FLASH_HAS_PAGE_LAYOUT
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select FLASH_JESD216
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select FLASH_HAS_EX_OP
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select SPI
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if SPI_NOR
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choice SPI_NOR_SFDP
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prompt "Source for Serial Flash Discoverable Parameters"
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default SPI_NOR_SFDP_MINIMAL
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config SPI_NOR_SFDP_MINIMAL
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bool "Fixed flash configuration"
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help
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Synthesize a minimal configuration assuming 256 By page size (or as
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set by the page-size devicetree property) and
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standard 4 KiBy and 64 KiBy erase instructions. Requires the size and
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jedec-id properties in the devicetree jedec,spi-nor node.
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config SPI_NOR_SFDP_DEVICETREE
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bool "Basic Flash Parameters from devicetree node"
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help
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The JESD216 Basic Flash Parameters table must be provided in the
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sfdp-bfp property in devicetree. The size and jedec-id properties are
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also required.
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config SPI_NOR_SFDP_RUNTIME
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bool "Read flash parameters at runtime"
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help
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Read all flash device characteristics from the device at runtime.
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This option is the most flexible as it should provide functionality
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for all supported JESD216-compatible devices.
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endchoice
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config SPI_NOR_INIT_PRIORITY
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int
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default 80
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help
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Device driver initialization priority.
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Device is connected to SPI bus, it has to
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be initialized after SPI driver.
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config SPI_NOR_CS_WAIT_DELAY
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int "Delay time in us"
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default 0
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help
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This is the wait delay (in us) to allow for CS switching to take effect
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config SPI_NOR_SLEEP_WHILE_WAITING_UNTIL_READY
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bool "Sleep while waiting for flash operations to complete"
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default y
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help
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Flash operations can take anywhere from 1ms to 240 seconds to
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complete. Enabling this option adds a delay between polls on the
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status register for slow operations. Disabling this option can
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result in significant flash savings if this driver is the only user
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of "k_sleep". This can be the case when building as a bootloader.
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config SPI_NOR_FLASH_LAYOUT_PAGE_SIZE
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int "Page size to use for FLASH_LAYOUT feature"
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default 65536
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help
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When CONFIG_FLASH_PAGE_LAYOUT is used this driver will support
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that API. By default the page size corresponds to the block
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size (65536). Other options include the 32K-byte erase size
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(32768), the sector size (4096), or any non-zero multiple of the
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sector size.
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config SPI_NOR_IDLE_IN_DPD
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bool "Use Deep Power-Down mode when flash is not being accessed."
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help
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Where supported deep power-down mode can reduce current draw
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to as little as 0.1% of standby current. However it takes
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some milliseconds to enter and exit from this mode.
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Select this option for applications where device power
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management is not enabled, the flash remains inactive for
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long periods, and when used the impact of waiting for mode
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enter and exit delays is acceptable.
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endif # SPI_NOR
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