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zephyr/drivers/flash/Kconfig.it8xxx2

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ite: drivers/flash: add flash driver for it8xxx2 Add flash driver for it8xxx2. The driver can implement flash read, write and erase that will be mapped to the ram section for executing. TEST="flash write 0x80000 0x10 0x20 0x30 0x40 ..." "flash read 0x80000 0x100" "flash erase 0x80000 0x1000" Signed-off-by: Tim Lin <tim2.lin@ite.corp-partner.google.com>
2020-12-25 18:23:44 +08:00
# FLASH configuration options
# Copyright (c) 2021 ITE Corporation. All Rights Reserved.
# SPDX-License-Identifier: Apache-2.0
config SOC_FLASH_ITE_IT8XXX2
bool "ITE IT8XXX2 flash driver"
drivers: flash: Update drivers to use devicetree Kconfig symbol Update flash 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>
2022-07-22 14:53:16 +08:00
default y
depends on DT_HAS_ITE_IT8XXX2_FLASH_CONTROLLER_ENABLED
it8xxx2: generalize ILM support Executing code out of RAM on IT8xxx2 requires that the relevant addresses be mapped onto the CPU's instruction memory bus, referred to by ITE documentation as Instruction Local Memory (ILM). ILM mappings configure blocks of RAM to be used for accesses to chosen addresses when performing instruction fetch, instead of the memory that would normally be accessed at that address. ILM must be used for some chip features (particularly Flash self-programming, to execute from RAM while writing to Flash), and has historically been configured in the Flash driver. The RAM for that was hard-coded as a single 4k block in the linker script. Configuring ILM in the flash driver is confusing because it is used by other SoC code as well, currently in code that cannot depend on the Flash being functional or in hand-selected functions that seem performance-critical. This change moves ILM configuration to a new driver and dynamically allocates RAM to ILM in the linker script, allowing software use of the entire 64k RAM depending on configuration. This makes ILM configuration more discoverable and makes it much easier to correctly support the CODE_DATA_RELOCATION feature on this SoC. Signed-off-by: Peter Marheine <pmarheine@chromium.org>
2022-09-15 12:52:52 +08:00
select SOC_IT8XXX2_USE_ILM
ite: drivers/flash: add flash driver for it8xxx2 Add flash driver for it8xxx2. The driver can implement flash read, write and erase that will be mapped to the ram section for executing. TEST="flash write 0x80000 0x10 0x20 0x30 0x40 ..." "flash read 0x80000 0x100" "flash erase 0x80000 0x1000" Signed-off-by: Tim Lin <tim2.lin@ite.corp-partner.google.com>
2020-12-25 18:23:44 +08:00
help
The flash driver includes support for read, write and
erase flash operations. It also supports protection.
The it8xxx2 flash size is 1M byte.