# TI CC13xx / CC26xx entropy driver configuration

# Copyright (c) 2019 Brett Witherspoon
# SPDX-License-Identifier: Apache-2.0

config ENTROPY_CC13XX_CC26XX_RNG
	bool "TI SimpleLink CC13xx / CC26xx True Random Number Generator (TRNG)"
	default y
	depends on DT_HAS_TI_CC13XX_CC26XX_TRNG_ENABLED
	select ENTROPY_HAS_DRIVER
	select RING_BUFFER
	help
	  This option enables the driver for the True Random Number Generator (TRNG)
	  for TI SimpleLink CC13xx / CC26xx SoCs.

if ENTROPY_CC13XX_CC26XX_RNG

config ENTROPY_CC13XX_CC26XX_POOL_SIZE
	int "Number of bytes in the entropy pool"
	default 512
	help
	  The size in bytes of the buffer used to store entropy generated by the
	  hardware. Should be a power of two for high performance.

config ENTROPY_CC13XX_CC26XX_SAMPLES_PER_CYCLE
	int "Number of samples to generate entropy"
	range 256 16777216
	default 240000
	help
	  The number of samples used to generate entropy. The time required to
	  generate 64 bits of entropy is determined by the number of FROs enabled,
	  the sampling (system) clock frequency, and this value.

config ENTROPY_CC13XX_CC26XX_ALARM_THRESHOLD
	int "Threshold for detected repeated patterns"
	range 0 $(UINT8_MAX)
	default $(UINT8_MAX)
	help
	  The number of samples detected with repeating patterns before an alarm
	  event is triggered. The associated FRO is automatically shut down.

config ENTROPY_CC13XX_CC26XX_SHUTDOWN_THRESHOLD
	int "Threshold for the number of FROs automatically shut down"
	range 0 24
	default 0
	help
	  The number of FROs allowed to be shutdown before the driver attempts to
	  take corrective action.

endif # ENTROPY_CC13XX_CC26XX_RNG