Because of this commit :
5ae84860b0 ("misc: i2c_eeprom: verify that the chip is functional at probe()")
at probe time, each eeprom is tested for read at offset 0.
The Atmel AT24MAC402 eeprom has different mapping. One i2c slave address is
used for the lower 0x80 bytes and another i2c slave address is used for the
upper 0x80 bytes. Because of this basically the i2c master sees 2 different
slaves. We need the upper bytes because we read the unique MAC address from
this EEPROM area.
However this implies that our slave address will return error on reads
from address 0x0 to 0x80.
To solve this, implemented an offset field inside platform data that is by
default 0 (as it is used now), but can be changed in the compatible table.
The probe function will now read at this offset and use it, instead of blindly
checking offset 0.
This will fix the regression noticed on these EEPROMs since the commit
abovementioned that introduces the probe failed issue.
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Associate the pagesize with compatible strings, and copy it to
priv->pagesize. This is more straight-forward.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Set the correct offset length and chip address offset mask for each
device to allow correct access to total capacity of the devices.
Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
Add ability to query size of eeprom device and partitions
Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
These functions do not use driver model but are still used. Move them to a
new eeprom.h header file.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Read a single byte from EEPROM to verify that it is actually there.
This is equivalent to Linux kernel commit 00f0ea70d2b8 ("eeprom: at24:
check if the chip is functional in probe()").
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
hs: fixed style check prefer kernel type 'u8' over 'uint8_t'
Linux kernel binding is using atmel,24c08 compatible string. On the
other hand there is atmel,24c08a which is not listed in the kernel.
Add compatible string without "a" suffix to be compatible with Linux
kernel binding.
These eeproms are available on several ZynqMP development boards.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from. So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry. Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.
In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.
This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents. There's also a few places where I found we did not have a tag
and have introduced one.
Signed-off-by: Tom Rini <trini@konsulko.com>
Add the new compatible "atmel,24mac402" to accommodate AT24MAC402.
The AT24MAC402 is a 2K Serial EEPROM and the 2-Kbit memory array
is internally organized as 16 pages of 16 bytes of EEPROM each.
The 48-bit EUI address in the AT24MAC402 are located in the extended
memory block.
Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>
Add the new compatible "microchip,24aa02e48" to accommodate 24AA02E48,
the 24AA02E48 is a 2K I2C Serial EEPROM with pre-programmed globally
unique, 48-bit node address, and 8-byte page size.
Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>
These are only used in drivers/mis/i2c_eeprom.c
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This patch implements the reading functionality for the generic I2C
EEPROM driver, which was just a non-functional stub until now.
Since the page size will be of importance for the writing support, we
add suitable members to the private data structure to keep track of it.
Compatibility strings for a range of at24c* chips are added.
Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
drivers/misc/i2c_eeprom.c fails to build unless CONFIG_FIT_SIGNATURE
is defined.
CC drivers/misc/i2c_eeprom.o
drivers/misc/i2c_eeprom.c: In function 'i2c_eeprom_read':
drivers/misc/i2c_eeprom.c:15:10: error: 'ENODEV' undeclared
(first use in this function)
drivers/misc/i2c_eeprom.c:15:10: note: each undeclared identifier
is reported only once for each function it appears in
drivers/misc/i2c_eeprom.c: In function 'i2c_eeprom_write':
drivers/misc/i2c_eeprom.c:21:10: error: 'ENODEV' undeclared
(first use in this function)
drivers/misc/i2c_eeprom.c:22:1: warning: control reaches end of
non-void function [-Wreturn-type]
drivers/misc/i2c_eeprom.c: In function 'i2c_eeprom_read':
drivers/misc/i2c_eeprom.c:16:1: warning: control reaches end of
non-void function [-Wreturn-type]
make[2]: *** [drivers/misc/i2c_eeprom.o] Error 1
make[1]: *** [drivers/misc] Error 2
make: *** [drivers] Error 2
By the way, Sandbox (enabling CONFIG_FIT_SIGNATURE) is luckily
working depending on it.
Sandbox includes include/asm-generic/errno.h
from include/errno.h
from include/u-boot/rsa-checksum.h
from include/image.h
from include/common.h
from drivers/misc/i2c_eeprom.c
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
There seem to be a few EEPROM drivers around - perhaps we should have a
single standard one? This simple driver is used for sandbox testing, but
could be pressed into more active service.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
