On Tue, 7 Jan 2020 10:29:18 +0100, Khouloud Touil wrote: > Several memories have a write-protect pin, that when pulled high, it > blocks the write operation. > > 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. > > Instead of modifying all the memory drivers to check this pin, make > the NVMEM subsystem check if the write-protect GPIO being passed > through the nvmem_config or defined in the device tree and pull it > low whenever writing to the memory. > > 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: Khouloud Touil <ktouil@xxxxxxxxxxxx> > --- > Documentation/devicetree/bindings/nvmem/nvmem.yaml | 11 +++++++++++ > 1 file changed, 11 insertions(+) > Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
