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SubjectRe: [PATCH v4 1/5] dt-bindings: nvmem: new optional property wp-gpios
On Tue, Jan 7, 2020 at 10:29 AM 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 <>

Reviewed-by: Linus Walleij <>

Linus Walleij

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