Re: [PATCH 0/2] eeprom: at24: write-protect pin support

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




2017-12-19 17:14 GMT+01:00 Bartosz Golaszewski <brgl@xxxxxxxx>:
> AT24 EEPROMs have a write-protect pin, which - when pulled high -
> inhibits writes to the upper quadrant of memory (although it has been
> observed that on some chips it disables writing to the entire memory
> range).
>
> On some boards, this pin is connected to a GPIO and pulled high by
> default, which forces the user to manually change its state before
> writing. On linux this means that we either need to hog the line all
> the time, or set the GPIO value before writing from outside of the
> at24 driver.
>
> This series adds support for the write-protect pin split into two
> parts. The first patch extends the relevant binding document, while
> the second modifies the at24 code to pull the write-protect GPIO
> low (if present) during write operations.
>
> Bartosz Golaszewski (2):
>   dt-bindings: at24: new optional property - write-protect-gpios
>   eeprom: at24: add support for the write-protect pin
>
>  Documentation/devicetree/bindings/eeprom/at24.txt |  4 ++++
>  drivers/misc/eeprom/at24.c                        | 12 ++++++++++++
>  2 files changed, 16 insertions(+)
>
> --
> 2.15.1
>

Superseded by v2.

Thanks,
Bartosz
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]


  Powered by Linux