soc/ite/ec/it8xxx2/Kconfig

# Copyright (c) 2020 ITE Corporation. All Rights Reserved.
# SPDX-License-Identifier: Apache-2.0

config SOC_SERIES_ITE_IT8XXX2
	select CPU_HAS_FPU if "$(ZEPHYR_TOOLCHAIN_VARIANT)" != "zephyr" || RISCV_ISA_EXT_M
	select HAS_PM

if SOC_SERIES_ITE_IT8XXX2

config SOC_IT8XXX2
	select RISCV
	select ATOMIC_OPERATIONS_BUILTIN
	select RISCV_ISA_RV32I
	select RISCV_ISA_EXT_ZICSR
	select RISCV_ISA_EXT_ZIFENCEI
	# Workaround mul instruction bug, see:
	# https://www.ite.com.tw/uploads/product_download/it81202-bx-chip-errata.pdf
	select RISCV_ISA_EXT_M if !(SOC_IT81302_BX || SOC_IT81202_BX)
	select RISCV_ISA_EXT_A
	select RISCV_ISA_EXT_C

config SOC_IT8XXX2_REG_SET_V1
	bool
	help
	  This option is selected by a variable of which soc, and will
	  determine the register for the IT81xx2 specification.

config SOC_IT8XXX2_REG_SET_V2
	bool
	help
	  This option is selected by a variable of which soc, and will
	  determine the register for the IT82xx2 specification.

config SOC_IT81302_BX
	select SOC_IT8XXX2_REG_SET_V1

config SOC_IT81202_BX
	select SOC_IT8XXX2_REG_SET_V1

config SOC_IT81302_CX
	select SOC_IT8XXX2_REG_SET_V1

config SOC_IT81202_CX
	select SOC_IT8XXX2_REG_SET_V1

config SOC_IT82202_AX
	select SOC_IT8XXX2_REG_SET_V2
	select SOC_IT8XXX2_EC_BUS_24MHZ if !DT_HAS_ITE_IT82XX2_USB_ENABLED

config SOC_IT82302_AX
	select SOC_IT8XXX2_REG_SET_V2
	select SOC_IT8XXX2_EC_BUS_24MHZ if !DT_HAS_ITE_IT82XX2_USB_ENABLED

config SOC_IT82002_AW
	select SOC_IT8XXX2_REG_SET_V2
	select SOC_IT8XXX2_EC_BUS_24MHZ if !DT_HAS_ITE_IT82XX2_USB_ENABLED

config SOC_IT8XXX2_PLL_FLASH_48M
	bool "Flash frequency is 48MHz"
	default y
	select FLASH
	help
	  Change frequency of PLL, CPU, and flash to 48MHz during initialization.

	  Set n to use the default settings.
	  (PLL and CPU run at 48MHz, flash frequency is 16MHz)

config SOC_IT8XXX2_GPIO_GROUP_K_L_DEFAULT_PULL_DOWN
	bool "The pins of GPIO group K and L aren't bonding with pad"
	default y
	help
	  On IT81202 (128-pins package), the pins of GPIO group K and L aren't
	  bonding with pad. So we configure these pins as internal pull-down
	  at default to prevent leakage current due to floating.

config SOC_IT8XXX2_GPIO_H7_DEFAULT_OUTPUT_LOW
	bool "The GPIOH7 isn't bonding with pad and is left floating internally"
	default y
	help
	  On IT81202/IT81302, the GPIOH7 isn't bonding with pad and is left
	  floating internally. We need to enable internal pull-down for the pin
	  to prevent leakage current, but IT81202/IT81302 doesn't have the
	  capability to pull it down. We can only set it as output low,
	  so we enable output low for it at initialization to prevent leakage.

config SOC_IT8XXX2_CPU_IDLE_GATING
	bool
	help
	  This option determines whether the entering CPU idle mode can be
	  gated by individual drivers. When this option is disabled, CPU idle
	  mode is always permitted.

config SOC_IT8XXX2_EC_BUS_24MHZ
	bool "EC bus is 24MHz"
	help
	  Raise EC bus to 24MHz (default is 8MHz).
	  This reduces read/write EC registers latency by 50%.
	  NOTE: There is limitation to enabling this config on it81xx2 series.
	  The clock_frequency of ite,it8xxx2-i2c node (i2c0, i2c1, and i2c2) will
	  be fixed at 400KHz.

choice
	prompt "Clock source for PLL reference clock"

config SOC_IT8XXX2_INT_32K
	bool "Use the +/-2.3% internal clock generator"

config SOC_IT8XXX2_EXT_32K
	bool "Use external 32.768 kHz clock source"

endchoice

config SOC_IT8XXX2_USE_ILM
	bool
	default y
	help
	  If enabled, Instruction Local Memory (ILM) will be configured to execute
	  code placed in the .__ram_code section out of RAM. This consumes RAM in
	  blocks of 4 kilobytes, but performance of code in ILM is much more
	  predictable than executing from Flash directly, and some code (such as code
	  that writes to the internal Flash) must execute out of RAM.

config SOC_IT8XXX2_EXCEPTIONS_IN_RAM
	bool "Place exception handling code in RAM"
	default y
	select SOC_IT8XXX2_USE_ILM
	help
	  Place exception handling (ISR entry/exit and related) code in ILM, which
	  has more reliable performance characteristics than executing directly from
	  Flash. This can significantly improve performance when under I-cache
	  pressure.

config SOC_IT8XXX2_SHA256_HW_ACCELERATE
	bool "HW SHA256 calculation"
	help
	  IT8XXX2 HW support sha256 calculation, and its calculation is faster than FW.
	  We place SHA256 message, hash and key data (total 512bytes) in RAM.
	  If we enable this config, because HW limits, the sha256 data must place in
	  first 4KB of RAM.

DT_CHOSEN_ZEPHYR_FLASH := zephyr,flash

config SOC_IT8XXX2_FLASH_SIZE_BYTES
	hex
	default $(dt_chosen_reg_size_hex,$(DT_CHOSEN_ZEPHYR_FLASH))
	help
	  Total size of writable flash.

config ILM_MAX_SIZE
	int "ILM Size in kB"
	default 60 if SOC_IT81202_CX || SOC_IT81302_CX
	default SRAM_SIZE

endif # SOC_SERIES_ITE_IT8XXX2