simplefb_read_u32_of
int ret = simplefb_read_u32_of(dev, of_node, "width", &width);
int ret = simplefb_read_u32_of(dev, of_node, "height", &height);
int ret = simplefb_read_u32_of(dev, of_node, "stride", &stride);
simplefb_read_u32_of(dev, panel_node, "width-mm", &width_mm);
simplefb_read_u32_of(dev, panel_node, "height-mm", &height_mm);