813b41beec
The rand driver present in the BLE Link Layer is able to provide entropy for both threads and ISRs, and so it is more suited to be used as a generic nRF5x entropy driver instead of the current one. This will allow applications and the Link Layer to use the same driver without duplicating it. Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no> Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
66 lines
1.8 KiB
Plaintext
66 lines
1.8 KiB
Plaintext
# Kconfig.nrf5 - nRF5 entropy generator driver configuration
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#
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# Copyright (c) 2018 Nordic Semiconductor ASA
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# Copyright (c) 2017 Exati Tecnologia Ltda.
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#
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# SPDX-License-Identifier: Apache-2.0
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menuconfig ENTROPY_NRF5_RNG
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bool "nRF5 RNG driver"
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depends on ENTROPY_GENERATOR
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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 "Enable bias correction (uniform distribution)"
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depends on ENTROPY_NRF5_RNG
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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_THRESHOLD
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int "Thread-mode low-water threshold"
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range 4 255
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help
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Low-water threshold in bytes to trigger entropy generation for
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thread mode consumers.
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config ENTROPY_NRF5_ISR_THRESHOLD
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int "ISR low-water threshold"
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range 12 255
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help
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Low-water threshold in bytes to trigger entropy generation for
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ISR consumers.
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config ENTROPY_NRF5_THR_BUF_LEN
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int "Thread-mode buffer length"
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range ENTROPY_NRF5_THR_THRESHOLD 255
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help
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Buffer length in bytes to pre-store entropy generation for
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thread mode consumers.
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config ENTROPY_NRF5_ISR_BUF_LEN
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int "ISR buffer length"
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range ENTROPY_NRF5_ISR_THRESHOLD 255
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help
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Buffer length in bytes to pre-store entropy generation for
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ISR consumers.
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config ENTROPY_NRF5_PRI
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int "RNG interrupt priority"
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depends on ENTROPY_NRF5_RNG
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range 0 2 if SOC_SERIES_NRF51X
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range 0 5 if SOC_SERIES_NRF52X
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default 2 if SOC_SERIES_NRF51X
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default 5 if SOC_SERIES_NRF52X
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help
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nRF5X RNG IRQ priority.
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endif #ENTROPY_NRF5_RNG
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