60 #define TI_ADS7950_MAN_CMD_SETTINGS(st) \  argument
61 	(TI_ADS7950_MAN_CMD(TI_ADS7950_CR_WRITE | st->cmd_settings_bitmask))
63 #define TI_ADS7950_GPIO_CMD_SETTINGS(st) \  argument
64 	(TI_ADS7950_GPIO_CMD(st->gpio_cmd_settings_bitmask))
286 	struct ti_ads7950_state *st = iio_priv(indio_dev);  in ti_ads7950_update_scan_mode()  local
292 		st->tx_buf[len++] = cmd;  in ti_ads7950_update_scan_mode()
296 	st->tx_buf[len++] = 0;  in ti_ads7950_update_scan_mode()
297 	st->tx_buf[len++] = 0;  in ti_ads7950_update_scan_mode()
299 	st->ring_xfer.len = len * 2;  in ti_ads7950_update_scan_mode()
308 	struct ti_ads7950_state *st = iio_priv(indio_dev);  in ti_ads7950_trigger_handler()  local
311 	mutex_lock(&st->slock);  in ti_ads7950_trigger_handler()
312 	ret = spi_sync(st->spi, &st->ring_msg);  in ti_ads7950_trigger_handler()
316 	iio_push_to_buffers_with_timestamp(indio_dev, &st->rx_buf[2],  in ti_ads7950_trigger_handler()
320 	mutex_unlock(&st->slock);  in ti_ads7950_trigger_handler()
328 	struct ti_ads7950_state *st = iio_priv(indio_dev);  in ti_ads7950_scan_direct()  local
331 	mutex_lock(&st->slock);  in ti_ads7950_scan_direct()
333 	st->single_tx = cmd;  in ti_ads7950_scan_direct()
335 	ret = spi_sync(st->spi, &st->scan_single_msg);  in ti_ads7950_scan_direct()
339 	ret = st->single_rx;  in ti_ads7950_scan_direct()
342 	mutex_unlock(&st->slock);  in ti_ads7950_scan_direct()
347 static int ti_ads7950_get_range(struct ti_ads7950_state *st)  in ti_ads7950_get_range()  argument
351 	if (st->vref_mv) {  in ti_ads7950_get_range()
352 		vref = st->vref_mv;  in ti_ads7950_get_range()
354 		vref = regulator_get_voltage(st->reg);  in ti_ads7950_get_range()
361 	if (st->cmd_settings_bitmask & TI_ADS7950_CR_RANGE_5V)  in ti_ads7950_get_range()
371 	struct ti_ads7950_state *st = iio_priv(indio_dev);  in ti_ads7950_read_raw()  local
388 		ret = ti_ads7950_get_range(st);  in ti_ads7950_read_raw()
409 	struct ti_ads7950_state *st = gpiochip_get_data(chip);  in ti_ads7950_set()  local
411 	mutex_lock(&st->slock);  in ti_ads7950_set()
414 		st->cmd_settings_bitmask |= BIT(offset);  in ti_ads7950_set()
416 		st->cmd_settings_bitmask &= ~BIT(offset);  in ti_ads7950_set()
418 	st->single_tx = TI_ADS7950_MAN_CMD_SETTINGS(st);  in ti_ads7950_set()
419 	spi_sync(st->spi, &st->scan_single_msg);  in ti_ads7950_set()
421 	mutex_unlock(&st->slock);  in ti_ads7950_set()
426 	struct ti_ads7950_state *st = gpiochip_get_data(chip);  in ti_ads7950_get()  local
429 	mutex_lock(&st->slock);  in ti_ads7950_get()
432 	if (st->gpio_cmd_settings_bitmask & BIT(offset)) {  in ti_ads7950_get()
433 		ret = st->cmd_settings_bitmask & BIT(offset);  in ti_ads7950_get()
438 	st->cmd_settings_bitmask |= TI_ADS7950_CR_GPIO_DATA;  in ti_ads7950_get()
439 	st->single_tx = TI_ADS7950_MAN_CMD_SETTINGS(st);  in ti_ads7950_get()
440 	ret = spi_sync(st->spi, &st->scan_single_msg);  in ti_ads7950_get()
444 	ret = ((st->single_rx >> 12) & BIT(offset)) ? 1 : 0;  in ti_ads7950_get()
447 	st->cmd_settings_bitmask &= ~TI_ADS7950_CR_GPIO_DATA;  in ti_ads7950_get()
448 	st->single_tx = TI_ADS7950_MAN_CMD_SETTINGS(st);  in ti_ads7950_get()
449 	ret = spi_sync(st->spi, &st->scan_single_msg);  in ti_ads7950_get()
454 	mutex_unlock(&st->slock);  in ti_ads7950_get()
462 	struct ti_ads7950_state *st = gpiochip_get_data(chip);  in ti_ads7950_get_direction()  local
465 	return !(st->gpio_cmd_settings_bitmask & BIT(offset));  in ti_ads7950_get_direction()
471 	struct ti_ads7950_state *st = gpiochip_get_data(chip);  in _ti_ads7950_set_direction()  local
474 	mutex_lock(&st->slock);  in _ti_ads7950_set_direction()
477 	if (input && (st->gpio_cmd_settings_bitmask & BIT(offset)))  in _ti_ads7950_set_direction()
478 		st->gpio_cmd_settings_bitmask &= ~BIT(offset);  in _ti_ads7950_set_direction()
479 	else if (!input && !(st->gpio_cmd_settings_bitmask & BIT(offset)))  in _ti_ads7950_set_direction()
480 		st->gpio_cmd_settings_bitmask |= BIT(offset);  in _ti_ads7950_set_direction()
484 	st->single_tx = TI_ADS7950_GPIO_CMD_SETTINGS(st);  in _ti_ads7950_set_direction()
485 	ret = spi_sync(st->spi, &st->scan_single_msg);  in _ti_ads7950_set_direction()
488 	mutex_unlock(&st->slock);  in _ti_ads7950_set_direction()
507 static int ti_ads7950_init_hw(struct ti_ads7950_state *st)  in ti_ads7950_init_hw()  argument
511 	mutex_lock(&st->slock);  in ti_ads7950_init_hw()
515 	st->cmd_settings_bitmask = TI_ADS7950_CR_RANGE_5V;  in ti_ads7950_init_hw()
516 	st->single_tx = TI_ADS7950_MAN_CMD_SETTINGS(st);  in ti_ads7950_init_hw()
517 	ret = spi_sync(st->spi, &st->scan_single_msg);  in ti_ads7950_init_hw()
522 	st->gpio_cmd_settings_bitmask = 0x0;  in ti_ads7950_init_hw()
523 	st->single_tx = TI_ADS7950_GPIO_CMD_SETTINGS(st);  in ti_ads7950_init_hw()
524 	ret = spi_sync(st->spi, &st->scan_single_msg);  in ti_ads7950_init_hw()
527 	mutex_unlock(&st->slock);  in ti_ads7950_init_hw()
534 	struct ti_ads7950_state *st;  in ti_ads7950_probe()  local
547 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in ti_ads7950_probe()
551 	st = iio_priv(indio_dev);  in ti_ads7950_probe()
555 	st->spi = spi;  in ti_ads7950_probe()
566 	spi_message_init(&st->ring_msg);  in ti_ads7950_probe()
568 	st->ring_xfer.tx_buf = &st->tx_buf[0];  in ti_ads7950_probe()
569 	st->ring_xfer.rx_buf = &st->rx_buf[0];  in ti_ads7950_probe()
572 	spi_message_add_tail(&st->ring_xfer, &st->ring_msg);  in ti_ads7950_probe()
583 	st->scan_single_xfer[0].tx_buf = &st->single_tx;  in ti_ads7950_probe()
584 	st->scan_single_xfer[0].len = 2;  in ti_ads7950_probe()
585 	st->scan_single_xfer[0].cs_change = 1;  in ti_ads7950_probe()
586 	st->scan_single_xfer[1].tx_buf = &st->single_tx;  in ti_ads7950_probe()
587 	st->scan_single_xfer[1].len = 2;  in ti_ads7950_probe()
588 	st->scan_single_xfer[1].cs_change = 1;  in ti_ads7950_probe()
589 	st->scan_single_xfer[2].rx_buf = &st->single_rx;  in ti_ads7950_probe()
590 	st->scan_single_xfer[2].len = 2;  in ti_ads7950_probe()
592 	spi_message_init_with_transfers(&st->scan_single_msg,  in ti_ads7950_probe()
593 					st->scan_single_xfer, 3);  in ti_ads7950_probe()
597 		st->vref_mv = TI_ADS7950_VA_MV_ACPI_DEFAULT;  in ti_ads7950_probe()
599 	mutex_init(&st->slock);  in ti_ads7950_probe()
601 	st->reg = devm_regulator_get(&spi->dev, "vref");  in ti_ads7950_probe()
602 	if (IS_ERR(st->reg)) {  in ti_ads7950_probe()
603 		ret = dev_err_probe(&spi->dev, PTR_ERR(st->reg),  in ti_ads7950_probe()
608 	ret = regulator_enable(st->reg);  in ti_ads7950_probe()
621 	ret = ti_ads7950_init_hw(st);  in ti_ads7950_probe()
634 	st->chip.label = dev_name(&st->spi->dev);  in ti_ads7950_probe()
635 	st->chip.parent = &st->spi->dev;  in ti_ads7950_probe()
636 	st->chip.owner = THIS_MODULE;  in ti_ads7950_probe()
637 	st->chip.can_sleep = true;  in ti_ads7950_probe()
638 	st->chip.base = -1;  in ti_ads7950_probe()
639 	st->chip.ngpio = TI_ADS7950_NUM_GPIOS;  in ti_ads7950_probe()
640 	st->chip.get_direction = ti_ads7950_get_direction;  in ti_ads7950_probe()
641 	st->chip.direction_input = ti_ads7950_direction_input;  in ti_ads7950_probe()
642 	st->chip.direction_output = ti_ads7950_direction_output;  in ti_ads7950_probe()
643 	st->chip.get = ti_ads7950_get;  in ti_ads7950_probe()
644 	st->chip.set = ti_ads7950_set;  in ti_ads7950_probe()
646 	ret = gpiochip_add_data(&st->chip, st);  in ti_ads7950_probe()
659 	regulator_disable(st->reg);  in ti_ads7950_probe()
661 	mutex_destroy(&st->slock);  in ti_ads7950_probe()
669 	struct ti_ads7950_state *st = iio_priv(indio_dev);  in ti_ads7950_remove()  local
671 	gpiochip_remove(&st->chip);  in ti_ads7950_remove()
674 	regulator_disable(st->reg);  in ti_ads7950_remove()
675 	mutex_destroy(&st->slock);  in ti_ads7950_remove()