148 	struct ltc1427_unit *unitp;  in ltc1427_open()  local
158 	unitp = (struct ltc1427_unit *)  in ltc1427_open()
161 	if (unitp == NULL) {  in ltc1427_open()
169 	mutex_enter(&unitp->ltc1427_mutex);  in ltc1427_open()
172 		if (unitp->ltc1427_oflag != 0) {  in ltc1427_open()
175 			unitp->ltc1427_oflag = FEXCL;  in ltc1427_open()
178 		if (unitp->ltc1427_oflag == FEXCL) {  in ltc1427_open()
181 			unitp->ltc1427_oflag = FOPEN;  in ltc1427_open()
185 	mutex_exit(&unitp->ltc1427_mutex);  in ltc1427_open()
195 	struct ltc1427_unit *unitp;  in ltc1427_close()  local
204 	unitp = (struct ltc1427_unit *)  in ltc1427_close()
207 	if (unitp == NULL) {  in ltc1427_close()
211 	mutex_enter(&unitp->ltc1427_mutex);  in ltc1427_close()
213 	unitp->ltc1427_oflag = 0;  in ltc1427_close()
215 	mutex_exit(&unitp->ltc1427_mutex);  in ltc1427_close()
225 	struct ltc1427_unit	*unitp;  in ltc1427_ioctl()  local
238 	unitp = (struct ltc1427_unit *)  in ltc1427_ioctl()
241 	mutex_enter(&unitp->ltc1427_mutex);  in ltc1427_ioctl()
246 		    unitp->current_set_flag));  in ltc1427_ioctl()
247 		if (unitp->current_set_flag == 0) {  in ltc1427_ioctl()
251 			if (ddi_copyout((caddr_t)&unitp->current_value,  in ltc1427_ioctl()
257 				    unitp->ltc1427_name));  in ltc1427_ioctl()
270 			    unitp->ltc1427_name));  in ltc1427_ioctl()
275 		(void) i2c_transfer_alloc(unitp->ltc1427_hdl,  in ltc1427_ioctl()
281 			    unitp->ltc1427_name));  in ltc1427_ioctl()
291 		err = i2c_transfer(unitp->ltc1427_hdl, i2c_tran_pointer);  in ltc1427_ioctl()
293 			unitp->current_value = fan_speed;  in ltc1427_ioctl()
294 			unitp->current_set_flag = 1;  in ltc1427_ioctl()
296 		i2c_transfer_free(unitp->ltc1427_hdl, i2c_tran_pointer);  in ltc1427_ioctl()
301 		    unitp->ltc1427_name, cmd));  in ltc1427_ioctl()
305 	mutex_exit(&unitp->ltc1427_mutex);  in ltc1427_ioctl()
338 	struct ltc1427_unit *unitp;  in ltc1427_do_attach()  local
349 	unitp = ddi_get_soft_state(ltc1427soft_statep, instance);  in ltc1427_do_attach()
351 	if (unitp == NULL) {  in ltc1427_do_attach()
357 	(void) snprintf(unitp->ltc1427_name, sizeof (unitp->ltc1427_name),  in ltc1427_do_attach()
363 		    "%s\n", unitp->ltc1427_name, "ltc1427");  in ltc1427_do_attach()
369 	if (i2c_client_register(dip, &unitp->ltc1427_hdl) != I2C_SUCCESS) {  in ltc1427_do_attach()
376 	mutex_init(&unitp->ltc1427_mutex, NULL, MUTEX_DRIVER, NULL);  in ltc1427_do_attach()
400 	struct ltc1427_unit *unitp;  in ltc1427_do_detach()  local
405 	unitp = ddi_get_soft_state(ltc1427soft_statep, instance);  in ltc1427_do_detach()
407 	if (unitp == NULL) {  in ltc1427_do_detach()
413 	i2c_client_unregister(unitp->ltc1427_hdl);  in ltc1427_do_detach()
417 	mutex_destroy(&unitp->ltc1427_mutex);  in ltc1427_do_detach()