On Wed, Dec 20, 2017 at 09:26:32AM +0100, Bartosz Golaszewski wrote: > 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. > > Add a new optional property to the device tree binding document, which > allows to specify the GPIO line to which the write-protect pin is > connected. > > Signed-off-by: Bartosz Golaszewski <brgl@xxxxxxxx> > --- > Documentation/devicetree/bindings/eeprom/at24.txt | 3 +++ > 1 file changed, 3 insertions(+) Reviewed-by: Rob Herring <robh@xxxxxxxxxx> -- 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
