wf_lm87_sensor
struct wf_lm87_sensor *lm;
lm = kzalloc_obj(struct wf_lm87_sensor);
struct wf_lm87_sensor *lm = i2c_get_clientdata(client);
#define wf_to_lm87(c) container_of(c, struct wf_lm87_sensor, sens)
struct wf_lm87_sensor *lm = sr->priv;
struct wf_lm87_sensor *lm = wf_to_lm87(sr);