2245bf89b7
Update entropy drivers to use DT_HAS_<compat>_ENABLED Kconfig symbol to expose the driver and enable it by default based on devicetree. We remove 'depend on' Kconfig for symbols that would be implied by the devicetree node existing. Signed-off-by: Kumar Gala <galak@kernel.org>
71 lines
2.3 KiB
Plaintext
71 lines
2.3 KiB
Plaintext
# nRF5 entropy generator driver configuration
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# Copyright (c) 2018 Nordic Semiconductor ASA
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# Copyright (c) 2017 Exati Tecnologia Ltda.
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# SPDX-License-Identifier: Apache-2.0
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config ENTROPY_NRF_FORCE_ALT
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bool
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depends on SOC_COMPATIBLE_NRF
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help
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This option can be enabled to force an alternative implementation
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of the entropy driver.
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menuconfig ENTROPY_NRF5_RNG
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bool "nRF5 RNG driver"
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default y
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depends on !ENTROPY_NRF_FORCE_ALT
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depends on DT_HAS_NORDIC_NRF_RNG_ENABLED
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select ENTROPY_HAS_DRIVER
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help
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This option enables the RNG peripheral, which is a random number
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generator, based on internal thermal noise, that provides a
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random 8-bit value to the host when read.
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if ENTROPY_NRF5_RNG
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config ENTROPY_NRF5_BIAS_CORRECTION
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bool "Bias correction (uniform distribution)"
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help
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This option enables the RNG bias correction, which guarantees a
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uniform distribution of 0 and 1. When this option is enabled, the time
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to generate a byte cannot be guaranteed.
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config ENTROPY_NRF5_THR_POOL_SIZE
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int "Thread-mode random number pool size"
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range ENTROPY_NRF5_THR_THRESHOLD 256
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default 8
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help
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Buffer length in bytes used to store entropy bytes generated by the
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hardware to make them ready for thread mode consumers.
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Please note, that size of the pool must be a power of 2.
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config ENTROPY_NRF5_THR_THRESHOLD
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int "Thread-mode random number pool low-water threshold"
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range 4 255
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help
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Low water-mark threshold in bytes to trigger entropy generation for
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thread mode consumers. As soon as the number of available bytes in the
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buffer goes below this number hardware entropy generation will be
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started.
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config ENTROPY_NRF5_ISR_POOL_SIZE
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int "ISR-mode random number pool size"
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range ENTROPY_NRF5_ISR_THRESHOLD 256
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default 16
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help
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Buffer length in bytes used to store entropy bytes generated by the
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hardware to make them ready for ISR consumers.
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Please note, that size of the pool must be a power of 2.
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config ENTROPY_NRF5_ISR_THRESHOLD
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int "ISR-mode random number pool low-water threshold"
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range 12 255
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help
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Low water-mark threshold in bytes to trigger entropy generation for
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ISR consumers. As soon as the number of available bytes in the
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buffer goes below this number hardware entropy generation will be
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started.
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endif # ENTROPY_NRF5_RNG
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