GRER
PWER = GFER = GRER = 1;
void __iomem *grer = gpio_reg(&priv->chip, gpio, GRER);
reg = gpio_reg(&priv->chip, base, GRER);
ctx->grer = readl(gpio_reg(&priv->chip, base, GRER));
writel(ctx->grer, gpio_reg(&priv->chip, base, GRER));
GRER |= 0x00000002;