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1b5621832f
misc/eeprom/{at24,at25,eeprom_93xx46} drivers all register their
corresponding devices in the nvmem framework in compat mode which requires
nvmem sysfs interface to be present. The latter, however, has been split
out from nvmem under a separate Kconfig in commit ae0c2d7255 ("nvmem:
core: add NVMEM_SYSFS Kconfig"). As a result, probing certain I2C-attached
EEPROMs now fails with
at24: probe of 0-0050 failed with error -38
because of a stub implementation of nvmem_sysfs_setup_compat()
in drivers/nvmem/nvmem.h. Update the nvmem dependency for these drivers
so they could load again:
at24 0-0050: 32768 byte 24c256 EEPROM, writable, 64 bytes/write
Cc: Adrian Bunk <bunk@kernel.org>
Cc: Bartosz Golaszewski <brgl@bgdev.pl>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: stable@vger.kernel.org # v5.2+
Signed-off-by: Arseny Solokha <asolokha@kb.kras.ru>
Link: https://lore.kernel.org/r/20190716111236.27803-1-asolokha@kb.kras.ru
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
130 lines
4.1 KiB
Plaintext
130 lines
4.1 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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menu "EEPROM support"
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config EEPROM_AT24
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tristate "I2C EEPROMs / RAMs / ROMs from most vendors"
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depends on I2C && SYSFS
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select NVMEM
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select NVMEM_SYSFS
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select REGMAP_I2C
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help
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Enable this driver to get read/write support to most I2C EEPROMs
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and compatible devices like FRAMs, SRAMs, ROMs etc. After you
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configure the driver to know about each chip on your target
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board. Use these generic chip names, instead of vendor-specific
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ones like at24c64, 24lc02 or fm24c04:
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24c00, 24c01, 24c02, spd (readonly 24c02), 24c04, 24c08,
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24c16, 24c32, 24c64, 24c128, 24c256, 24c512, 24c1024, 24c2048
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Unless you like data loss puzzles, always be sure that any chip
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you configure as a 24c32 (32 kbit) or larger is NOT really a
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24c16 (16 kbit) or smaller, and vice versa. Marking the chip
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as read-only won't help recover from this. Also, if your chip
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has any software write-protect mechanism you may want to review the
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code to make sure this driver won't turn it on by accident.
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If you use this with an SMBus adapter instead of an I2C adapter,
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full functionality is not available. Only smaller devices are
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supported (24c16 and below, max 4 kByte).
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This driver can also be built as a module. If so, the module
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will be called at24.
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config EEPROM_AT25
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tristate "SPI EEPROMs from most vendors"
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depends on SPI && SYSFS
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select NVMEM
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select NVMEM_SYSFS
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help
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Enable this driver to get read/write support to most SPI EEPROMs,
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after you configure the board init code to know about each eeprom
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on your target board.
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This driver can also be built as a module. If so, the module
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will be called at25.
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config EEPROM_LEGACY
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tristate "Old I2C EEPROM reader"
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depends on I2C && SYSFS
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help
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If you say yes here you get read-only access to the EEPROM data
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available on modern memory DIMMs and Sony Vaio laptops via I2C. Such
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EEPROMs could theoretically be available on other devices as well.
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This driver can also be built as a module. If so, the module
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will be called eeprom.
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config EEPROM_MAX6875
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tristate "Maxim MAX6874/5 power supply supervisor"
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depends on I2C
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help
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If you say yes here you get read-only support for the user EEPROM of
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the Maxim MAX6874/5 EEPROM-programmable, quad power-supply
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sequencer/supervisor.
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All other features of this chip should be accessed via i2c-dev.
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This driver can also be built as a module. If so, the module
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will be called max6875.
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config EEPROM_93CX6
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tristate "EEPROM 93CX6 support"
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help
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This is a driver for the EEPROM chipsets 93c46 and 93c66.
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The driver supports both read as well as write commands.
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If unsure, say N.
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config EEPROM_93XX46
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tristate "Microwire EEPROM 93XX46 support"
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depends on SPI && SYSFS
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select REGMAP
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select NVMEM
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select NVMEM_SYSFS
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help
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Driver for the microwire EEPROM chipsets 93xx46x. The driver
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supports both read and write commands and also the command to
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erase the whole EEPROM.
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This driver can also be built as a module. If so, the module
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will be called eeprom_93xx46.
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If unsure, say N.
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config EEPROM_DIGSY_MTC_CFG
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bool "DigsyMTC display configuration EEPROMs device"
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depends on GPIO_MPC5200 && SPI_GPIO
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help
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This option enables access to display configuration EEPROMs
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on digsy_mtc board. You have to additionally select Microwire
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EEPROM 93XX46 driver. sysfs entries will be created for that
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EEPROM allowing to read/write the configuration data or to
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erase the whole EEPROM.
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If unsure, say N.
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config EEPROM_IDT_89HPESX
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tristate "IDT 89HPESx PCIe-swtiches EEPROM / CSR support"
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depends on I2C && SYSFS
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help
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Enable this driver to get read/write access to EEPROM / CSRs
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over IDT PCIe-swtich i2c-slave 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 idt_89hpesx.
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config EEPROM_EE1004
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tristate "SPD EEPROMs on DDR4 memory modules"
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depends on I2C && SYSFS
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help
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Enable this driver to get read support to SPD EEPROMs following
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the JEDEC EE1004 standard. These are typically found on DDR4
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SDRAM memory modules.
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This driver can also be built as a module. If so, the module
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will be called ee1004.
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endmenu
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