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()
295 	/* Data for the 1st channel is not returned until the 3rd transfer */  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
412 	mutex_lock(&st->slock);  in ti_ads7950_set()
415 		st->cmd_settings_bitmask |= BIT(offset);  in ti_ads7950_set()
417 		st->cmd_settings_bitmask &= ~BIT(offset);  in ti_ads7950_set()
419 	st->single_tx = TI_ADS7950_MAN_CMD_SETTINGS(st);  in ti_ads7950_set()
420 	ret = spi_sync(st->spi, &st->scan_single_msg);  in ti_ads7950_set()
422 	mutex_unlock(&st->slock);  in ti_ads7950_set()
429 	struct ti_ads7950_state *st = gpiochip_get_data(chip);  in ti_ads7950_get()  local
432 	mutex_lock(&st->slock);  in ti_ads7950_get()
435 	if (st->gpio_cmd_settings_bitmask & BIT(offset)) {  in ti_ads7950_get()
436 		ret = st->cmd_settings_bitmask & BIT(offset);  in ti_ads7950_get()
441 	st->cmd_settings_bitmask |= TI_ADS7950_CR_GPIO_DATA;  in ti_ads7950_get()
442 	st->single_tx = TI_ADS7950_MAN_CMD_SETTINGS(st);  in ti_ads7950_get()
443 	ret = spi_sync(st->spi, &st->scan_single_msg);  in ti_ads7950_get()
447 	ret = ((st->single_rx >> 12) & BIT(offset)) ? 1 : 0;  in ti_ads7950_get()
450 	st->cmd_settings_bitmask &= ~TI_ADS7950_CR_GPIO_DATA;  in ti_ads7950_get()
451 	st->single_tx = TI_ADS7950_MAN_CMD_SETTINGS(st);  in ti_ads7950_get()
452 	ret = spi_sync(st->spi, &st->scan_single_msg);  in ti_ads7950_get()
457 	mutex_unlock(&st->slock);  in ti_ads7950_get()
465 	struct ti_ads7950_state *st = gpiochip_get_data(chip);  in ti_ads7950_get_direction()  local
468 	return !(st->gpio_cmd_settings_bitmask & BIT(offset));  in ti_ads7950_get_direction()
474 	struct ti_ads7950_state *st = gpiochip_get_data(chip);  in _ti_ads7950_set_direction()  local
477 	mutex_lock(&st->slock);  in _ti_ads7950_set_direction()
480 	if (input && (st->gpio_cmd_settings_bitmask & BIT(offset)))  in _ti_ads7950_set_direction()
481 		st->gpio_cmd_settings_bitmask &= ~BIT(offset);  in _ti_ads7950_set_direction()
482 	else if (!input && !(st->gpio_cmd_settings_bitmask & BIT(offset)))  in _ti_ads7950_set_direction()
483 		st->gpio_cmd_settings_bitmask |= BIT(offset);  in _ti_ads7950_set_direction()
487 	st->single_tx = TI_ADS7950_GPIO_CMD_SETTINGS(st);  in _ti_ads7950_set_direction()
488 	ret = spi_sync(st->spi, &st->scan_single_msg);  in _ti_ads7950_set_direction()
491 	mutex_unlock(&st->slock);  in _ti_ads7950_set_direction()
514 static int ti_ads7950_init_hw(struct ti_ads7950_state *st)  in ti_ads7950_init_hw()  argument
518 	mutex_lock(&st->slock);  in ti_ads7950_init_hw()
522 	st->cmd_settings_bitmask = TI_ADS7950_CR_RANGE_5V;  in ti_ads7950_init_hw()
523 	st->single_tx = TI_ADS7950_MAN_CMD_SETTINGS(st);  in ti_ads7950_init_hw()
524 	ret = spi_sync(st->spi, &st->scan_single_msg);  in ti_ads7950_init_hw()
529 	st->gpio_cmd_settings_bitmask = 0x0;  in ti_ads7950_init_hw()
530 	st->single_tx = TI_ADS7950_GPIO_CMD_SETTINGS(st);  in ti_ads7950_init_hw()
531 	ret = spi_sync(st->spi, &st->scan_single_msg);  in ti_ads7950_init_hw()
534 	mutex_unlock(&st->slock);  in ti_ads7950_init_hw()
541 	struct ti_ads7950_state *st;  in ti_ads7950_probe()  local
554 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in ti_ads7950_probe()
558 	st = iio_priv(indio_dev);  in ti_ads7950_probe()
562 	st->spi = spi;  in ti_ads7950_probe()
573 	spi_message_init(&st->ring_msg);  in ti_ads7950_probe()
575 	st->ring_xfer.tx_buf = &st->tx_buf[0];  in ti_ads7950_probe()
576 	st->ring_xfer.rx_buf = &st->rx_buf[0];  in ti_ads7950_probe()
579 	spi_message_add_tail(&st->ring_xfer, &st->ring_msg);  in ti_ads7950_probe()
590 	st->scan_single_xfer[0].tx_buf = &st->single_tx;  in ti_ads7950_probe()
591 	st->scan_single_xfer[0].len = 2;  in ti_ads7950_probe()
592 	st->scan_single_xfer[0].cs_change = 1;  in ti_ads7950_probe()
593 	st->scan_single_xfer[1].tx_buf = &st->single_tx;  in ti_ads7950_probe()
594 	st->scan_single_xfer[1].len = 2;  in ti_ads7950_probe()
595 	st->scan_single_xfer[1].cs_change = 1;  in ti_ads7950_probe()
596 	st->scan_single_xfer[2].rx_buf = &st->single_rx;  in ti_ads7950_probe()
597 	st->scan_single_xfer[2].len = 2;  in ti_ads7950_probe()
599 	spi_message_init_with_transfers(&st->scan_single_msg,  in ti_ads7950_probe()
600 					st->scan_single_xfer, 3);  in ti_ads7950_probe()
604 		st->vref_mv = TI_ADS7950_VA_MV_ACPI_DEFAULT;  in ti_ads7950_probe()
606 	mutex_init(&st->slock);  in ti_ads7950_probe()
608 	st->reg = devm_regulator_get(&spi->dev, "vref");  in ti_ads7950_probe()
609 	if (IS_ERR(st->reg)) {  in ti_ads7950_probe()
610 		ret = dev_err_probe(&spi->dev, PTR_ERR(st->reg),  in ti_ads7950_probe()
615 	ret = regulator_enable(st->reg);  in ti_ads7950_probe()
628 	ret = ti_ads7950_init_hw(st);  in ti_ads7950_probe()
641 	st->chip.label = dev_name(&st->spi->dev);  in ti_ads7950_probe()
642 	st->chip.parent = &st->spi->dev;  in ti_ads7950_probe()
643 	st->chip.owner = THIS_MODULE;  in ti_ads7950_probe()
644 	st->chip.can_sleep = true;  in ti_ads7950_probe()
645 	st->chip.base = -1;  in ti_ads7950_probe()
646 	st->chip.ngpio = TI_ADS7950_NUM_GPIOS;  in ti_ads7950_probe()
647 	st->chip.get_direction = ti_ads7950_get_direction;  in ti_ads7950_probe()
648 	st->chip.direction_input = ti_ads7950_direction_input;  in ti_ads7950_probe()
649 	st->chip.direction_output = ti_ads7950_direction_output;  in ti_ads7950_probe()
650 	st->chip.get = ti_ads7950_get;  in ti_ads7950_probe()
651 	st->chip.set = ti_ads7950_set;  in ti_ads7950_probe()
653 	ret = gpiochip_add_data(&st->chip, st);  in ti_ads7950_probe()
666 	regulator_disable(st->reg);  in ti_ads7950_probe()
668 	mutex_destroy(&st->slock);  in ti_ads7950_probe()
676 	struct ti_ads7950_state *st = iio_priv(indio_dev);  in ti_ads7950_remove()  local
678 	gpiochip_remove(&st->chip);  in ti_ads7950_remove()
681 	regulator_disable(st->reg);  in ti_ads7950_remove()
682 	mutex_destroy(&st->slock);  in ti_ads7950_remove()