PCF8574
snprintf(pcf8574_devpath, sizeof (pcf8574_devpath), PCF8574,
case PCF8574:
case PCF8574:
envctrl_recv(unitp, (caddr_t *)(void *)&fspchip, PCF8574);
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&fspchip, PCF8574);
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&initval, PCF8574);
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&initval, PCF8574);
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&initval, PCF8574);
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&initval, PCF8574);
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&chip, PCF8574);
chip->type = PCF8574;
envctrl_recv(unitp, (caddr_t *)(void *)chip, PCF8574);
backchip.type = PCF8574;
envctrl_recv(unitp, (caddr_t *)(void *)&backchip, PCF8574);
envctrl_recv(unitp, (caddr_t *)(void *)&fspchip, PCF8574);
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&fspchip, PCF8574);
chip->type = PCF8574;
(void) envctrl_xmit(unitp, (caddr_t *)(void *)chip, PCF8574);
envctrl_recv(unitp, (caddr_t *)(void *)&chip, PCF8574);
chip.type = PCF8574;
envctrl_recv(unitp, (caddr_t *)(void *)&chip, PCF8574);
envctrl_recv(unitp, (caddr_t *)(void *)&chip, PCF8574);