Hello Judith, On Fri, Jul 10, 2026 at 06:04:09PM -0500, Judith Mendez wrote: > Some board designs have slow RC circuits on GPIO outputs controlled by > PCA953X I2C expanders. On some board designs, pin voltage transitions > can take significant time after I2C write command completes. > > Add an optional "gpio-settle-delay-ms" device tree property for the > pca953x driver to add a delay after I2C write if specified, allowing to > compensate for slow RC circuits. > > Signed-off-by: Judith Mendez <[email protected]> > --- > drivers/gpio/pca953x_gpio.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/gpio/pca953x_gpio.c b/drivers/gpio/pca953x_gpio.c > index 965a5fcf30b..54b957069c9 100644 > --- a/drivers/gpio/pca953x_gpio.c > +++ b/drivers/gpio/pca953x_gpio.c > @@ -333,6 +339,8 @@ static int pca953x_probe(struct udevice *dev) > > info->bank_count = DIV_ROUND_UP(info->gpio_count, BANK_SZ); > > + info->settle_delay_ms = dev_read_u32_default(dev, > "gpio-settle-delay-ms", 0);
Is this property supported also in Linux and defined in the Linux binding? I do not think we should have U-Boot specific DT properties. Francesco
