PCF_CTRL_ESO
pcfiic_write(sc, PCF_S1, PCF_CTRL_ESO);
#define PCF_CTRL_START (PCF_CTRL_PIN | PCF_CTRL_ESO | \
#define PCF_CTRL_STOP (PCF_CTRL_PIN | PCF_CTRL_ESO | \
#define PCF_CTRL_REPSTART (PCF_CTRL_ESO | PCF_CTRL_STA | PCF_CTRL_ACK)
#define PCF_CTRL_IDLE (PCF_CTRL_PIN | PCF_CTRL_ESO | PCF_CTRL_ACK)