2019-11-01 20:45:29 +08:00
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# TI CC13xx / CC26xx entropy driver configuration
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2019-04-26 07:07:31 +08:00
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# Copyright (c) 2019 Brett Witherspoon
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# SPDX-License-Identifier: Apache-2.0
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config ENTROPY_CC13XX_CC26XX_RNG
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bool "TI SimpleLink CC13xx / CC26xx True Random Number Generator (TRNG)"
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depends on SOC_SERIES_CC13X2_CC26X2
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select ENTROPY_HAS_DRIVER
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select RING_BUFFER
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help
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This option enables the driver for the True Random Number Generator (TRNG)
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for TI SimpleLink CC13xx / CC26xx SoCs.
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if ENTROPY_CC13XX_CC26XX_RNG
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config ENTROPY_CC13XX_CC26XX_POOL_SIZE
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int "Number of bytes in the entropy pool"
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default 512
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help
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The size in bytes of the buffer used to store entropy generated by the
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hardware. Should be a power of two for high performance.
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config ENTROPY_CC13XX_CC26XX_SAMPLES_PER_CYCLE
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int "Number of samples to generate entropy"
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range 256 16777216
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default 240000
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help
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The number of samples used to generate entropy. The time required to
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generate 64 bits of entropy is determined by the number of FROs enabled,
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the sampling (system) clock frequency, and this value.
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config ENTROPY_CC13XX_CC26XX_ALARM_THRESHOLD
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int "Threshold for detected repeated patterns"
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range 0 255
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default 255
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help
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The number of samples detected with repeating patterns before an alarm
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event is triggered. The associated FRO is automatically shut down.
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config ENTROPY_CC13XX_CC26XX_SHUTDOWN_THRESHOLD
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int "Threshold for the number of FROs automatically shut down"
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range 0 24
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default 0
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help
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The number of FROs allowed to be shutdown before the driver attempts to
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take corrective action.
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endif # ENTROPY_CC13XX_CC26XX_RNG
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