panel_encoder
#define to_panel_encoder(x) container_of(x, struct panel_encoder, base)
struct panel_encoder *panel_encoder = to_panel_encoder(encoder);
struct backlight_device *backlight = panel_encoder->mod->backlight;
struct gpio_desc *gpio = panel_encoder->mod->enable_gpio;
struct panel_encoder *panel_encoder;
panel_encoder = devm_kzalloc(dev->dev, sizeof(*panel_encoder),
if (!panel_encoder)
panel_encoder->mod = mod;
encoder = &panel_encoder->base;