GFER
PWER = GFER = GRER = 1;
void __iomem *gfer = gpio_reg(&priv->chip, gpio, GFER);
reg = gpio_reg(&priv->chip, base, GFER);
ctx->gfer = readl(gpio_reg(&priv->chip, base, GFER));
writel(ctx->gfer, gpio_reg(&priv->chip, base, GFER));