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1530b923a5
R-Car Gen4 SoCs contain fuses indicating hardware support or hardware
(e.g. tuning) parameters. Add a driver to access the state of the
fuses. This supports two types of hardware fuse providers:
1. E-FUSE non-volatile memory accessible through the Pin Function
Controller on R-Car V3U and S4-8,
2. E-FUSE non-volatile memory accessible through OTP_MEM on R-Car V4H
and V4M.
The state of the cells can be read using the NVMEM framework, either
from kernel space (e.g. by the Renesas UFSHCD driver), or from
userspace.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20241030140315.40562-3-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
432 lines
13 KiB
Plaintext
432 lines
13 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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menuconfig NVMEM
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bool "NVMEM Support"
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imply NVMEM_LAYOUTS
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help
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Support for NVMEM(Non Volatile Memory) devices like EEPROM, EFUSES...
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This framework is designed to provide a generic interface to NVMEM
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from both the Linux Kernel and the userspace.
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If unsure, say no.
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if NVMEM
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config NVMEM_SYSFS
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bool "/sys/bus/nvmem/devices/*/nvmem (sysfs interface)"
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depends on SYSFS
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default y
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help
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Say Y here to add a sysfs interface for NVMEM.
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This interface is mostly used by userspace applications to
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read/write directly into nvmem.
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# Layouts
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source "drivers/nvmem/layouts/Kconfig"
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# Devices
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config NVMEM_APPLE_EFUSES
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tristate "Apple eFuse support"
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depends on ARCH_APPLE || COMPILE_TEST
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default ARCH_APPLE
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help
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Say y here to enable support for reading eFuses on Apple SoCs
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such as the M1. These are e.g. used to store factory programmed
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calibration data required for the PCIe or the USB-C PHY.
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This driver can also be built as a module. If so, the module will
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be called nvmem-apple-efuses.
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config NVMEM_BCM_OCOTP
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tristate "Broadcom On-Chip OTP Controller support"
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depends on ARCH_BCM_IPROC || COMPILE_TEST
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depends on HAS_IOMEM
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default ARCH_BCM_IPROC
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help
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Say y here to enable read/write access to the Broadcom OTP
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controller.
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This driver can also be built as a module. If so, the module
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will be called nvmem-bcm-ocotp.
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config NVMEM_BRCM_NVRAM
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tristate "Broadcom's NVRAM support"
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depends on ARCH_BCM_5301X || COMPILE_TEST
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depends on HAS_IOMEM
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select GENERIC_NET_UTILS
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help
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This driver provides support for Broadcom's NVRAM that can be accessed
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using I/O mapping.
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config NVMEM_IMX_IIM
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tristate "i.MX IC Identification Module support"
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depends on ARCH_MXC || COMPILE_TEST
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help
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This is a driver for the IC Identification Module (IIM) available on
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i.MX SoCs, providing access to 4 Kbits of programmable
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eFuses.
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This driver can also be built as a module. If so, the module
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will be called nvmem-imx-iim.
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config NVMEM_IMX_OCOTP
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tristate "i.MX 6/7/8 On-Chip OTP Controller support"
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depends on ARCH_MXC || COMPILE_TEST
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depends on HAS_IOMEM
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help
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This is a driver for the On-Chip OTP Controller (OCOTP) available on
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i.MX6 SoCs, providing access to 4 Kbits of one-time programmable
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eFuses.
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This driver can also be built as a module. If so, the module
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will be called nvmem-imx-ocotp.
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config NVMEM_IMX_OCOTP_ELE
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tristate "i.MX On-Chip OTP Controller support"
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depends on ARCH_MXC || COMPILE_TEST
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depends on HAS_IOMEM
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depends on OF
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help
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This is a driver for the On-Chip OTP Controller (OCOTP)
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available on i.MX SoCs which has ELE.
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config NVMEM_IMX_OCOTP_SCU
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tristate "i.MX8 SCU On-Chip OTP Controller support"
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depends on IMX_SCU
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depends on HAVE_ARM_SMCCC
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help
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This is a driver for the SCU On-Chip OTP Controller (OCOTP)
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available on i.MX8 SoCs.
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config NVMEM_JZ4780_EFUSE
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tristate "JZ4780 EFUSE Memory Support"
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depends on MACH_INGENIC || COMPILE_TEST
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depends on HAS_IOMEM
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depends on OF
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select REGMAP_MMIO
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help
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Say Y here to include support for JZ4780 efuse memory found on
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all JZ4780 SoC based devices.
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To compile this driver as a module, choose M here: the module
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will be called nvmem_jz4780_efuse.
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config NVMEM_LAN9662_OTPC
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tristate "Microchip LAN9662 OTP controller support"
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depends on SOC_LAN966 || COMPILE_TEST
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depends on HAS_IOMEM
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help
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This driver enables the OTP controller available on Microchip LAN9662
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SoCs. It controls the access to the OTP memory connected to it.
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config NVMEM_LAYERSCAPE_SFP
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tristate "Layerscape SFP (Security Fuse Processor) support"
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depends on ARCH_LAYERSCAPE || COMPILE_TEST
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depends on HAS_IOMEM
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select REGMAP_MMIO
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help
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This driver provides support to read the eFuses on Freescale
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Layerscape SoC's. For example, the vendor provides a per part
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unique ID there.
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This driver can also be built as a module. If so, the module
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will be called layerscape-sfp.
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config NVMEM_LPC18XX_EEPROM
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tristate "NXP LPC18XX EEPROM Memory Support"
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depends on ARCH_LPC18XX || COMPILE_TEST
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depends on HAS_IOMEM
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help
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Say Y here to include support for NXP LPC18xx EEPROM memory found in
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NXP LPC185x/3x and LPC435x/3x/2x/1x devices.
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To compile this driver as a module, choose M here: the module
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will be called nvmem_lpc18xx_eeprom.
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config NVMEM_LPC18XX_OTP
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tristate "NXP LPC18XX OTP Memory Support"
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depends on ARCH_LPC18XX || COMPILE_TEST
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depends on HAS_IOMEM
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help
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Say Y here to include support for NXP LPC18xx OTP memory found on
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all LPC18xx and LPC43xx devices.
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To compile this driver as a module, choose M here: the module
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will be called nvmem_lpc18xx_otp.
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config NVMEM_MESON_EFUSE
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tristate "Amlogic Meson GX eFuse Support"
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depends on (ARCH_MESON || COMPILE_TEST) && MESON_SM
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help
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This is a driver to retrieve specific values from the eFuse found on
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the Amlogic Meson GX SoCs.
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This driver can also be built as a module. If so, the module
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will be called nvmem_meson_efuse.
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config NVMEM_MESON_MX_EFUSE
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tristate "Amlogic Meson6/Meson8/Meson8b eFuse Support"
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depends on ARCH_MESON || COMPILE_TEST
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help
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This is a driver to retrieve specific values from the eFuse found on
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the Amlogic Meson6, Meson8 and Meson8b SoCs.
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This driver can also be built as a module. If so, the module
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will be called nvmem_meson_mx_efuse.
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config NVMEM_MICROCHIP_OTPC
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tristate "Microchip OTPC support"
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depends on ARCH_AT91 || COMPILE_TEST
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help
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This driver enable the OTP controller available on Microchip SAMA7G5
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SoCs. It controls the access to the OTP memory connected to it.
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config NVMEM_MTK_EFUSE
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tristate "Mediatek SoCs EFUSE support"
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depends on ARCH_MEDIATEK || COMPILE_TEST
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depends on HAS_IOMEM
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help
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This is a driver to access hardware related data like sensor
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calibration, HDMI impedance etc.
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This driver can also be built as a module. If so, the module
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will be called efuse-mtk.
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config NVMEM_MXS_OCOTP
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tristate "Freescale MXS On-Chip OTP Memory Support"
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depends on ARCH_MXS || COMPILE_TEST
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depends on HAS_IOMEM
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help
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If you say Y here, you will get readonly access to the
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One Time Programmable memory pages that are stored
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on the Freescale i.MX23/i.MX28 processor.
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This driver can also be built as a module. If so, the module
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will be called nvmem-mxs-ocotp.
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config NVMEM_NINTENDO_OTP
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tristate "Nintendo Wii and Wii U OTP Support"
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depends on WII || COMPILE_TEST
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help
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This is a driver exposing the OTP of a Nintendo Wii or Wii U console.
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This memory contains common and per-console keys, signatures and
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related data required to access peripherals.
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This driver can also be built as a module. If so, the module
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will be called nvmem-nintendo-otp.
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config NVMEM_QCOM_QFPROM
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tristate "QCOM QFPROM Support"
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depends on ARCH_QCOM || COMPILE_TEST
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depends on HAS_IOMEM
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help
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Say y here to enable QFPROM support. The QFPROM provides access
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functions for QFPROM data to rest of the drivers via nvmem interface.
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This driver can also be built as a module. If so, the module
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will be called nvmem_qfprom.
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config NVMEM_QCOM_SEC_QFPROM
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tristate "QCOM SECURE QFPROM Support"
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depends on ARCH_QCOM || COMPILE_TEST
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depends on HAS_IOMEM
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depends on OF
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select QCOM_SCM
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help
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Say y here to enable secure QFPROM support. The secure QFPROM provides access
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functions for QFPROM data to rest of the drivers via nvmem interface.
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This driver can also be built as a module. If so, the module will be called
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nvmem_sec_qfprom.
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config NVMEM_RAVE_SP_EEPROM
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tristate "Rave SP EEPROM Support"
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depends on RAVE_SP_CORE
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help
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Say y here to enable Rave SP EEPROM support.
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config NVMEM_RCAR_EFUSE
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tristate "Renesas R-Car Gen4 E-FUSE support"
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depends on (ARCH_RENESAS && ARM64) || COMPILE_TEST
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depends on NVMEM
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help
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Enable support for reading the fuses in the E-FUSE or OTP
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non-volatile memory block on Renesas R-Car Gen4 SoCs.
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This driver can also be built as a module. If so, the module
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will be called nvmem-rcar-efuse.
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config NVMEM_RMEM
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tristate "Reserved Memory Based Driver Support"
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depends on HAS_IOMEM
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help
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This driver maps reserved memory into an nvmem device. It might be
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useful to expose information left by firmware in memory.
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This driver can also be built as a module. If so, the module
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will be called nvmem-rmem.
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config NVMEM_ROCKCHIP_EFUSE
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tristate "Rockchip eFuse Support"
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depends on ARCH_ROCKCHIP || COMPILE_TEST
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depends on HAS_IOMEM
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help
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This is a simple driver to dump specified values of Rockchip SoC
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from eFuse, such as cpu-leakage.
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This driver can also be built as a module. If so, the module
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will be called nvmem_rockchip_efuse.
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config NVMEM_ROCKCHIP_OTP
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tristate "Rockchip OTP controller support"
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depends on ARCH_ROCKCHIP || COMPILE_TEST
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depends on HAS_IOMEM
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help
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This is a simple driver to dump specified values of Rockchip SoC
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from OTP, such as cpu-leakage.
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This driver can also be built as a module. If so, the module
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will be called nvmem_rockchip_otp.
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config NVMEM_SC27XX_EFUSE
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tristate "Spreadtrum SC27XX eFuse Support"
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depends on MFD_SC27XX_PMIC || COMPILE_TEST
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depends on HAS_IOMEM
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help
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This is a simple driver to dump specified values of Spreadtrum
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SC27XX PMICs from eFuse.
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This driver can also be built as a module. If so, the module
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will be called nvmem-sc27xx-efuse.
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config NVMEM_SNVS_LPGPR
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tristate "Support for Low Power General Purpose Register"
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depends on ARCH_MXC || COMPILE_TEST
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help
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This is a driver for Low Power General Purpose Register (LPGPR) available on
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i.MX6 and i.MX7 SoCs in Secure Non-Volatile Storage (SNVS) of this chip.
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This driver can also be built as a module. If so, the module
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will be called nvmem-snvs-lpgpr.
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config NVMEM_SPMI_SDAM
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tristate "SPMI SDAM Support"
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depends on SPMI
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help
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This driver supports the Shared Direct Access Memory Module on
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Qualcomm Technologies, Inc. PMICs. It provides the clients
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an interface to read/write to the SDAM module's shared memory.
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config NVMEM_SPRD_EFUSE
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tristate "Spreadtrum SoC eFuse Support"
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depends on ARCH_SPRD || COMPILE_TEST
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depends on HAS_IOMEM
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help
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This is a simple driver to dump specified values of Spreadtrum
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SoCs from eFuse.
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This driver can also be built as a module. If so, the module
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will be called nvmem-sprd-efuse.
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config NVMEM_STM32_BSEC_OPTEE_TA
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def_bool NVMEM_STM32_ROMEM && OPTEE
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help
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Say y here to enable the accesses to STM32MP SoC OTPs by the OP-TEE
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trusted application STM32MP BSEC.
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This library is a used by stm32-romem driver or included in the module
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called nvmem-stm32-romem.
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config NVMEM_STM32_ROMEM
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tristate "STMicroelectronics STM32 factory-programmed memory support"
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depends on ARCH_STM32 || COMPILE_TEST
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depends on OPTEE || !OPTEE
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help
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Say y here to enable read-only access for STMicroelectronics STM32
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factory-programmed memory area.
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This driver can also be built as a module. If so, the module
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will be called nvmem-stm32-romem.
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config NVMEM_SUNPLUS_OCOTP
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tristate "Sunplus SoC OTP support"
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depends on SOC_SP7021 || COMPILE_TEST
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depends on HAS_IOMEM
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help
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This is a driver for the On-chip OTP controller (OCOTP) available
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on Sunplus SoCs. It provides access to 128 bytes of one-time
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programmable eFuse.
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This driver can also be built as a module. If so, the module
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will be called nvmem-sunplus-ocotp.
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config NVMEM_SUNXI_SID
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tristate "Allwinner SoCs SID support"
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depends on ARCH_SUNXI
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help
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This is a driver for the 'security ID' available on various Allwinner
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devices.
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This driver can also be built as a module. If so, the module
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will be called nvmem_sunxi_sid.
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config NVMEM_U_BOOT_ENV
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tristate "U-Boot environment variables support"
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depends on OF && MTD
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select NVMEM_LAYOUT_U_BOOT_ENV
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help
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U-Boot stores its setup as environment variables. This driver adds
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support for verifying & exporting such data. It also exposes variables
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as NVMEM cells so they can be referenced by other drivers.
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Currently this drivers works only with env variables on top of MTD.
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If compiled as module it will be called nvmem_u-boot-env.
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config NVMEM_UNIPHIER_EFUSE
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tristate "UniPhier SoCs eFuse support"
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depends on ARCH_UNIPHIER || COMPILE_TEST
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depends on HAS_IOMEM
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help
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This is a simple driver to dump specified values of UniPhier SoC
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from eFuse.
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This driver can also be built as a module. If so, the module
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will be called nvmem-uniphier-efuse.
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config NVMEM_VF610_OCOTP
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tristate "VF610 SoC OCOTP support"
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depends on SOC_VF610 || COMPILE_TEST
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depends on HAS_IOMEM
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help
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This is a driver for the 'OCOTP' peripheral available on Vybrid
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devices like VF5xx and VF6xx.
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This driver can also be build as a module. If so, the module will
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be called nvmem-vf610-ocotp.
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config NVMEM_ZYNQMP
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tristate "Xilinx ZYNQMP SoC nvmem firmware support"
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depends on ARCH_ZYNQMP
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help
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This is a driver to access hardware related data like
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soc revision, IDCODE... etc by using the firmware
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interface.
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If sure, say yes. If unsure, say no.
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config NVMEM_QORIQ_EFUSE
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tristate "NXP QorIQ eFuse support"
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depends on PPC_85xx || COMPILE_TEST
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depends on HAS_IOMEM
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help
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This driver provides read support for the eFuses (SFP) on NXP QorIQ
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series SoC's. This includes secure boot settings, the globally unique
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NXP ID 'FUIDR' and the OEM unique ID 'OUIDR'.
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This driver can also be built as a module. If so, the module
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will be called nvmem_qoriq_efuse.
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endif
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