iio/adc/ad4130.c

248 	int				slot;
596 			    unsigned int *slot, bool *overwrite)
600 	*slot = AD4130_INVALID_SLOT;
609 			*slot = i;
617 		/* Find the least used slot. */
618 		if (*slot == AD4130_INVALID_SLOT ||
619 		    slot_info->channels < st->slots_info[*slot].channels)
620 			*slot = i;
623 	if (*slot == AD4130_INVALID_SLOT)
634 	struct ad4130_slot_info *slot_info = &st->slots_info[chan_info->slot];
636 	chan_info->slot = AD4130_INVALID_SLOT;
640 static int ad4130_unlink_slot(struct ad4130_state *st, unsigned int slot)
647 		if (!chan_info->initialized || chan_info->slot != slot)
657 				    unsigned int channel, unsigned int slot)
659 	struct ad4130_slot_info *slot_info = &st->slots_info[slot];
665 				 FIELD_PREP(AD4130_CHANNEL_SETUP_MASK, slot));
669 	chan_info->slot = slot;
676 				   unsigned int slot,
690 	ret = regmap_write(st->regmap, AD4130_CONFIG_X_REG(slot), val);
697 	ret = regmap_write(st->regmap, AD4130_FILTER_X_REG(slot), val);
701 	memcpy(&st->slots_info[slot].setup, setup_info, sizeof(*setup_info));
712 	int slot;
719 	 *    - Find a slot. If not possible, return error.
720 	 *    - Unlink channel from current slot.
721 	 *    - If the slot has channels linked to it, unlink all channels, and
723 	 *    - Link channel to new slot.
726 	 *    - Find a slot. If not possible, return error.
727 	 *    - If the slot has channels linked to it, unlink all channels, and
729 	 *    - Link channel to the slot.
732 	 *    - Unlink channel from current slot.
740 	if (on_enable && chan_info->slot != AD4130_INVALID_SLOT)
744 		if (chan_info->slot != AD4130_INVALID_SLOT)
753 	ret = ad4130_find_slot(st, setup_info, &slot, &overwrite);
757 	if (chan_info->slot != AD4130_INVALID_SLOT)
762 		ret = ad4130_unlink_slot(st, slot);
766 		ret = ad4130_write_slot_setup(st, slot, setup_info);
771 	return ad4130_link_channel_slot(st, channel, slot);
790 	slot_info = &st->slots_info[chan_info->slot];
1560 	chan_info->slot = AD4130_INVALID_SLOT;