Lines Matching +full:rx +full:- +full:sample +full:- +full:delay +full:- +full:ns
1 // SPDX-License-Identifier: GPL-2.0-only
14 #include <linux/delay.h>
15 #include <linux/dma-mapping.h>
32 #include <linux/nvmem-consumer.h>
37 #include <dt-bindings/iio/adc/at91-sama5d2_adc.h>
111 /* Interrupt Enable Register - TS X measurement ready */
113 /* Interrupt Enable Register - TS Y measurement ready */
115 /* Interrupt Enable Register - TS pressure measurement ready */
117 /* Interrupt Enable Register - Data ready */
119 /* Interrupt Enable Register - general overrun error */
121 /* Interrupt Enable Register - Pen detect */
123 /* Interrupt Enable Register - No pen detect */
140 /* Interrupt Status Register - Pen touching sense status */
150 /* Extended Mode Register - Oversampling rate */
158 /* Extended Mode Register - TRACKX */
165 /* Extended Mode Register - Averaging on single trigger event */
174 /* Channel Offset Register differential offset - constant, not a register */
178 /* Analog Control Register - Pen detect sensitivity mask */
180 /* Analog Control Register - Source last channel */
185 /* Touchscreen Mode Register - No touch mode */
187 /* Touchscreen Mode Register - 4 wire screen, no pressure measurement */
189 /* Touchscreen Mode Register - 4 wire screen, pressure measurement */
191 /* Touchscreen Mode Register - 5 wire screen */
193 /* Touchscreen Mode Register - Average samples mask */
195 /* Touchscreen Mode Register - Average samples */
197 /* Touchscreen Mode Register - Touch/trigger frequency ratio mask */
199 /* Touchscreen Mode Register - Touch/trigger frequency ratio */
201 /* Touchscreen Mode Register - Pen Debounce Time mask */
203 /* Touchscreen Mode Register - Pen Debounce Time */
205 /* Touchscreen Mode Register - No DMA for touch measurements */
207 /* Touchscreen Mode Register - Disable pen detection */
209 /* Touchscreen Mode Register - Enable pen detection */
232 /* Trigger Mode - trigger period mask */
234 /* Trigger Mode - trigger period */
251 /* Temperature Sensor Mode - Temperature sensor on */
379 .datasheet_name = "CH"#num"-CH"#num2, \
442 readl_relaxed((st)->base + (st)->soc_info.platform->layout->reg)
444 readl_relaxed((st)->base + reg)
446 writel_relaxed(val, (st)->base + (st)->soc_info.platform->layout->reg)
449 * struct at91_adc_platform - at91-sama5d2 platform information struct
487 * struct at91_adc_temp_sensor_clb - at91-sama5d2 temperature sensor
500 * enum at91_adc_ts_clb_idx - calibration indexes in NVMEM buffer
513 /* Temperature sensor calibration - Vtemp voltage sensitivity to temperature. */
517 * struct at91_adc_soc_info - at91-sama5d2 soc information struct
519 * @min_sample_rate: minimum sample rate in Hz
520 * @max_sample_rate: maximum sample rate in Hz
540 * struct at91_adc_dma - at91-sama5d2 dma information struct
562 * struct at91_adc_touch - at91-sama5d2 touchscreen information struct
578 * struct at91_adc_temp - at91-sama5d2 temperature information structure
579 * @sample_period_val: sample period value
580 * @saved_sample_rate: saved sample rate
763 for (i = 0; i < indio_dev->num_channels; i++) { in at91_adc_chan_xlate()
764 if (indio_dev->channels[i].scan_index == chan) in at91_adc_chan_xlate()
767 return -EINVAL; in at91_adc_chan_xlate()
777 return indio_dev->channels + index; in at91_adc_chan_get()
783 return at91_adc_chan_xlate(indio_dev, iiospec->args[0]); in at91_adc_fwnode_xlate()
792 for_each_set_bit(bit, indio_dev->active_scan_mask, in at91_adc_active_scan_mask_to_reg()
793 indio_dev->num_channels) { in at91_adc_active_scan_mask_to_reg()
796 mask |= BIT(chan->channel); in at91_adc_active_scan_mask_to_reg()
799 return mask & GENMASK(st->soc_info.platform->nr_channels, 0); in at91_adc_active_scan_mask_to_reg()
807 cor = BIT(chan->channel) | BIT(chan->channel2); in at91_adc_cor()
810 cor <<= st->soc_info.platform->layout->COR_diff_offset; in at91_adc_cor()
811 if (chan->differential) in at91_adc_cor()
821 if (st->soc_info.platform->layout->EOC_ISR) in at91_adc_irq_status()
830 if (st->soc_info.platform->layout->EOC_IMR) in at91_adc_irq_mask()
843 if (!st->soc_info.platform->layout->EOC_IDR) in at91_adc_eoc_dis()
849 if (!st->soc_info.platform->layout->EOC_IDR) in at91_adc_eoc_ena()
860 unsigned int osr_mask = st->soc_info.platform->osr_mask; in at91_adc_config_emr()
864 for (i = 0; i < st->soc_info.platform->oversampling_avail_no; i++) { in at91_adc_config_emr()
865 if (oversampling_ratio == st->soc_info.platform->oversampling_avail[i]) in at91_adc_config_emr()
868 if (i == st->soc_info.platform->oversampling_avail_no) in at91_adc_config_emr()
869 return -EINVAL; in at91_adc_config_emr()
895 ret = pm_runtime_resume_and_get(st->dev); in at91_adc_config_emr()
908 pm_runtime_mark_last_busy(st->dev); in at91_adc_config_emr()
909 pm_runtime_put_autosuspend(st->dev); in at91_adc_config_emr()
911 st->oversampling_ratio = oversampling_ratio; in at91_adc_config_emr()
920 if (st->oversampling_ratio == 1) in at91_adc_adjust_val_osr()
922 else if (st->oversampling_ratio == 4) in at91_adc_adjust_val_osr()
924 else if (st->oversampling_ratio == 16) in at91_adc_adjust_val_osr()
926 else if (st->oversampling_ratio == 64) in at91_adc_adjust_val_osr()
928 else if (st->oversampling_ratio == 256) in at91_adc_adjust_val_osr()
932 return -EINVAL; in at91_adc_adjust_val_osr()
936 * st->soc_info.platform->chan_realbits, so shift left diff bits. in at91_adc_adjust_val_osr()
938 diff = st->soc_info.platform->chan_realbits - nbits; in at91_adc_adjust_val_osr()
951 * We are converting each two bytes (each sample). in at91_adc_adjust_val_osr_array()
952 * First convert the byte based array to u16, and convert each sample in at91_adc_adjust_val_osr_array()
968 u32 clk_khz = st->current_sample_rate / 1000; in at91_adc_configure_touch()
974 ret = pm_runtime_resume_and_get(st->dev); in at91_adc_configure_touch()
983 pm_runtime_mark_last_busy(st->dev); in at91_adc_configure_touch()
984 pm_runtime_put_autosuspend(st->dev); in at91_adc_configure_touch()
1017 /* Sample Period Time = (TRGPER + 1) / ADCClock */ in at91_adc_configure_touch()
1018 st->touch_st.sample_period_val = in at91_adc_configure_touch()
1020 clk_khz / 1000) - 1, 1); in at91_adc_configure_touch()
1035 * max = 2^AT91_SAMA5D2_MAX_POS_BITS - 1 in at91_adc_touch_pos()
1038 if (reg == st->soc_info.platform->layout->XPOSR) in at91_adc_touch_pos()
1040 else if (reg == st->soc_info.platform->layout->YPOSR) in at91_adc_touch_pos()
1044 dev_dbg(&st->indio_dev->dev, "pos is 0\n"); in at91_adc_touch_pos()
1047 result = (pos << AT91_SAMA5D2_MAX_POS_BITS) - pos; in at91_adc_touch_pos()
1050 dev_err(&st->indio_dev->dev, "scale is 0\n"); in at91_adc_touch_pos()
1060 st->touch_st.x_pos = at91_adc_touch_pos(st, st->soc_info.platform->layout->XPOSR); in at91_adc_touch_x_pos()
1061 return st->touch_st.x_pos; in at91_adc_touch_x_pos()
1066 return at91_adc_touch_pos(st, st->soc_info.platform->layout->YPOSR); in at91_adc_touch_y_pos()
1083 pres = rxp * (st->touch_st.x_pos * factor / 1024) * in at91_adc_touch_pressure()
1084 (z2 * factor / z1 - factor) / in at91_adc_touch_pressure()
1094 return 0xFFFF - pres; in at91_adc_touch_pressure()
1100 if (!st->touch_st.touching) in at91_adc_read_position()
1101 return -ENODATA; in at91_adc_read_position()
1102 if (chan == st->soc_info.platform->touch_chan_x) in at91_adc_read_position()
1104 else if (chan == st->soc_info.platform->touch_chan_y) in at91_adc_read_position()
1107 return -ENODATA; in at91_adc_read_position()
1115 if (!st->touch_st.touching) in at91_adc_read_pressure()
1116 return -ENODATA; in at91_adc_read_pressure()
1117 if (chan == st->soc_info.platform->touch_chan_p) in at91_adc_read_pressure()
1120 return -ENODATA; in at91_adc_read_pressure()
1134 status |= st->selected_trig->trgmod_value; in at91_adc_configure_trigger_registers()
1147 ret = pm_runtime_resume_and_get(st->dev); in at91_adc_configure_trigger()
1155 pm_runtime_mark_last_busy(st->dev); in at91_adc_configure_trigger()
1156 pm_runtime_put_autosuspend(st->dev); in at91_adc_configure_trigger()
1168 if (st->dma_st.dma_chan) in at91_adc_reenable_trigger()
1171 enable_irq(st->irq); in at91_adc_reenable_trigger()
1189 status = dmaengine_tx_status(st->dma_st.dma_chan, in at91_adc_dma_size_done()
1190 st->dma_st.dma_chan->cookie, in at91_adc_dma_size_done()
1196 i = st->dma_st.rx_buf_sz - state.residue; in at91_adc_dma_size_done()
1199 if (i >= st->dma_st.buf_idx) in at91_adc_dma_size_done()
1200 size = i - st->dma_st.buf_idx; in at91_adc_dma_size_done()
1202 size = st->dma_st.rx_buf_sz + i - st->dma_st.buf_idx; in at91_adc_dma_size_done()
1210 iio_trigger_poll_nested(indio_dev->trig); in at91_dma_buffer_done()
1221 if (!st->dma_st.dma_chan) in at91_adc_dma_start()
1225 st->dma_st.buf_idx = 0; in at91_adc_dma_start()
1231 st->dma_st.rx_buf_sz = 0; in at91_adc_dma_start()
1233 for_each_set_bit(bit, indio_dev->active_scan_mask, in at91_adc_dma_start()
1234 indio_dev->num_channels) { in at91_adc_dma_start()
1241 st->dma_st.rx_buf_sz += chan->scan_type.storagebits / 8; in at91_adc_dma_start()
1243 st->dma_st.rx_buf_sz *= st->dma_st.watermark; in at91_adc_dma_start()
1246 desc = dmaengine_prep_dma_cyclic(st->dma_st.dma_chan, in at91_adc_dma_start()
1247 st->dma_st.rx_dma_buf, in at91_adc_dma_start()
1248 st->dma_st.rx_buf_sz, in at91_adc_dma_start()
1249 st->dma_st.rx_buf_sz / 2, in at91_adc_dma_start()
1253 dev_err(&indio_dev->dev, "cannot prepare DMA cyclic\n"); in at91_adc_dma_start()
1254 return -EBUSY; in at91_adc_dma_start()
1257 desc->callback = at91_dma_buffer_done; in at91_adc_dma_start()
1258 desc->callback_param = indio_dev; in at91_adc_dma_start()
1263 dev_err(&indio_dev->dev, "cannot submit DMA cyclic\n"); in at91_adc_dma_start()
1264 dmaengine_terminate_async(st->dma_st.dma_chan); in at91_adc_dma_start()
1271 dma_async_issue_pending(st->dma_st.dma_chan); in at91_adc_dma_start()
1274 st->dma_st.dma_ts = iio_get_time_ns(indio_dev); in at91_adc_dma_start()
1276 dev_dbg(&indio_dev->dev, "DMA cyclic started\n"); in at91_adc_dma_start()
1284 /* if using DMA, we do not use our own IRQ (we use DMA-controller) */ in at91_adc_buffer_check_use_irq()
1285 if (st->dma_st.dma_chan) in at91_adc_buffer_check_use_irq()
1288 if (iio_trigger_validate_own_device(indio->trig, indio)) in at91_adc_buffer_check_use_irq()
1297 return !!bitmap_subset(indio_dev->active_scan_mask, in at91_adc_current_chan_is_touch()
1298 &st->touch_st.channels_bitmask, in at91_adc_current_chan_is_touch()
1299 st->soc_info.platform->max_index + 1); in at91_adc_current_chan_is_touch()
1314 return -EINVAL; in at91_adc_buffer_prepare()
1316 ret = pm_runtime_resume_and_get(st->dev); in at91_adc_buffer_prepare()
1323 dev_err(&indio_dev->dev, "buffer prepare failed\n"); in at91_adc_buffer_prepare()
1327 for_each_set_bit(bit, indio_dev->active_scan_mask, in at91_adc_buffer_prepare()
1328 indio_dev->num_channels) { in at91_adc_buffer_prepare()
1334 if (chan->type == IIO_POSITIONRELATIVE || in at91_adc_buffer_prepare()
1335 chan->type == IIO_PRESSURE || in at91_adc_buffer_prepare()
1336 chan->type == IIO_TEMP) in at91_adc_buffer_prepare()
1341 at91_adc_writel(st, CHER, BIT(chan->channel)); in at91_adc_buffer_prepare()
1348 pm_runtime_mark_last_busy(st->dev); in at91_adc_buffer_prepare()
1349 pm_runtime_put_autosuspend(st->dev); in at91_adc_buffer_prepare()
1365 return -EINVAL; in at91_adc_buffer_postdisable()
1367 ret = pm_runtime_resume_and_get(st->dev); in at91_adc_buffer_postdisable()
1377 for_each_set_bit(bit, indio_dev->active_scan_mask, in at91_adc_buffer_postdisable()
1378 indio_dev->num_channels) { in at91_adc_buffer_postdisable()
1385 if (chan->type == IIO_POSITIONRELATIVE || in at91_adc_buffer_postdisable()
1386 chan->type == IIO_PRESSURE || in at91_adc_buffer_postdisable()
1387 chan->type == IIO_TEMP) in at91_adc_buffer_postdisable()
1390 at91_adc_writel(st, CHDR, BIT(chan->channel)); in at91_adc_buffer_postdisable()
1392 if (st->dma_st.dma_chan) in at91_adc_buffer_postdisable()
1393 at91_adc_read_chan(st, chan->address); in at91_adc_buffer_postdisable()
1403 if (st->dma_st.dma_chan) in at91_adc_buffer_postdisable()
1404 dmaengine_terminate_sync(st->dma_st.dma_chan); in at91_adc_buffer_postdisable()
1406 pm_runtime_mark_last_busy(st->dev); in at91_adc_buffer_postdisable()
1407 pm_runtime_put_autosuspend(st->dev); in at91_adc_buffer_postdisable()
1422 trig = devm_iio_trigger_alloc(&indio->dev, "%s-dev%d-%s", indio->name, in at91_adc_allocate_trigger()
1425 return ERR_PTR(-ENOMEM); in at91_adc_allocate_trigger()
1427 trig->dev.parent = indio->dev.parent; in at91_adc_allocate_trigger()
1429 trig->ops = &at91_adc_trigger_ops; in at91_adc_allocate_trigger()
1431 ret = devm_iio_trigger_register(&indio->dev, trig); in at91_adc_allocate_trigger()
1457 timeout--; in at91_adc_trigger_handler_nodma()
1464 for_each_set_bit(bit, indio_dev->active_scan_mask, in at91_adc_trigger_handler_nodma()
1465 indio_dev->num_channels) { in at91_adc_trigger_handler_nodma()
1481 if (chan->type == IIO_VOLTAGE) { in at91_adc_trigger_handler_nodma()
1482 val = at91_adc_read_chan(st, chan->address); in at91_adc_trigger_handler_nodma()
1484 st->buffer[i] = val; in at91_adc_trigger_handler_nodma()
1486 st->buffer[i] = 0; in at91_adc_trigger_handler_nodma()
1491 iio_push_to_buffers_with_timestamp(indio_dev, st->buffer, in at91_adc_trigger_handler_nodma()
1492 pf->timestamp); in at91_adc_trigger_handler_nodma()
1499 s64 ns = iio_get_time_ns(indio_dev); in at91_adc_trigger_handler_dma() local
1504 /* if we reached this point, we cannot sample faster */ in at91_adc_trigger_handler_dma()
1507 indio_dev->name); in at91_adc_trigger_handler_dma()
1509 sample_size = div_s64(st->dma_st.rx_buf_sz, st->dma_st.watermark); in at91_adc_trigger_handler_dma()
1515 * divided by the number of samples (total size divided by sample size) in at91_adc_trigger_handler_dma()
1517 interval = div_s64((ns - st->dma_st.dma_ts), sample_count); in at91_adc_trigger_handler_dma()
1521 * for all the values in the current sample, in at91_adc_trigger_handler_dma()
1525 &st->dma_st.rx_buf[st->dma_st.buf_idx], in at91_adc_trigger_handler_dma()
1529 (st->dma_st.rx_buf + st->dma_st.buf_idx), in at91_adc_trigger_handler_dma()
1530 (st->dma_st.dma_ts + interval * sample_index)); in at91_adc_trigger_handler_dma()
1532 transferred_len -= sample_size; in at91_adc_trigger_handler_dma()
1534 st->dma_st.buf_idx += sample_size; in at91_adc_trigger_handler_dma()
1536 if (st->dma_st.buf_idx >= st->dma_st.rx_buf_sz) in at91_adc_trigger_handler_dma()
1537 st->dma_st.buf_idx = 0; in at91_adc_trigger_handler_dma()
1541 st->dma_st.dma_ts = iio_get_time_ns(indio_dev); in at91_adc_trigger_handler_dma()
1547 struct iio_dev *indio_dev = pf->indio_dev; in at91_adc_trigger_handler()
1554 if (iio_trigger_validate_own_device(indio_dev->trig, indio_dev)) in at91_adc_trigger_handler()
1557 if (st->dma_st.dma_chan) in at91_adc_trigger_handler()
1562 iio_trigger_notify_done(indio_dev->trig); in at91_adc_trigger_handler()
1599 f_per = clk_get_rate(st->per_clk); in at91_adc_setup_samp_freq()
1600 prescal = (f_per / (2 * freq)) - 1; in at91_adc_setup_samp_freq()
1604 ret = pm_runtime_resume_and_get(st->dev); in at91_adc_setup_samp_freq()
1615 pm_runtime_mark_last_busy(st->dev); in at91_adc_setup_samp_freq()
1616 pm_runtime_put_autosuspend(st->dev); in at91_adc_setup_samp_freq()
1618 dev_dbg(&indio_dev->dev, "freq: %u, startup: %u, prescal: %u, tracktim=%u\n", in at91_adc_setup_samp_freq()
1620 st->current_sample_rate = freq; in at91_adc_setup_samp_freq()
1625 return st->current_sample_rate; in at91_adc_get_sample_freq()
1635 for_each_set_bit(bit, indio_dev->active_scan_mask, in at91_adc_touch_data_handler()
1636 st->soc_info.platform->max_index + 1) { in at91_adc_touch_data_handler()
1640 if (chan->type == IIO_POSITIONRELATIVE) in at91_adc_touch_data_handler()
1641 at91_adc_read_position(st, chan->channel, &val); in at91_adc_touch_data_handler()
1642 else if (chan->type == IIO_PRESSURE) in at91_adc_touch_data_handler()
1643 at91_adc_read_pressure(st, chan->channel, &val); in at91_adc_touch_data_handler()
1646 st->buffer[i] = val; in at91_adc_touch_data_handler()
1657 schedule_work(&st->touch_st.workq); in at91_adc_touch_data_handler()
1667 AT91_SAMA5D2_TRGR_TRGPER(st->touch_st.sample_period_val)); in at91_adc_pen_detect_interrupt()
1668 st->touch_st.touching = true; in at91_adc_pen_detect_interrupt()
1679 st->touch_st.touching = false; in at91_adc_no_pen_detect_interrupt()
1692 struct iio_dev *indio_dev = st->indio_dev; in at91_adc_workq_handler()
1694 iio_push_to_buffers(indio_dev, st->buffer); in at91_adc_workq_handler()
1718 /* periodic trigger IRQ - during pen sense */ in at91_adc_interrupt()
1732 iio_trigger_poll(indio->trig); in at91_adc_interrupt()
1733 } else if (iio_buffer_enabled(indio) && st->dma_st.dma_chan) { in at91_adc_interrupt()
1734 /* triggered buffer with DMA - should not happen */ in at91_adc_interrupt()
1739 st->conversion_value = at91_adc_read_chan(st, st->chan->address); in at91_adc_interrupt()
1740 st->conversion_done = true; in at91_adc_interrupt()
1741 wake_up_interruptible(&st->wq_data_available); in at91_adc_interrupt()
1746 /* This needs to be called with direct mode claimed and st->lock locked. */
1754 ret = pm_runtime_resume_and_get(st->dev); in at91_adc_read_info_raw()
1762 if (chan->type == IIO_POSITIONRELATIVE) { in at91_adc_read_info_raw()
1763 ret = at91_adc_read_position(st, chan->channel, in at91_adc_read_info_raw()
1771 if (chan->type == IIO_PRESSURE) { in at91_adc_read_info_raw()
1772 ret = at91_adc_read_pressure(st, chan->channel, in at91_adc_read_info_raw()
1783 st->chan = chan; in at91_adc_read_info_raw()
1786 at91_adc_writel(st, CHER, BIT(chan->channel)); in at91_adc_read_info_raw()
1792 if (chan->type == IIO_TEMP) in at91_adc_read_info_raw()
1794 at91_adc_eoc_ena(st, chan->channel); in at91_adc_read_info_raw()
1797 ret = wait_event_interruptible_timeout(st->wq_data_available, in at91_adc_read_info_raw()
1798 st->conversion_done, in at91_adc_read_info_raw()
1801 ret = -ETIMEDOUT; in at91_adc_read_info_raw()
1804 *val = st->conversion_value; in at91_adc_read_info_raw()
1806 if (chan->scan_type.sign == 's') in at91_adc_read_info_raw()
1808 chan->scan_type.realbits - 1); in at91_adc_read_info_raw()
1809 st->conversion_done = false; in at91_adc_read_info_raw()
1812 at91_adc_eoc_dis(st, st->chan->channel); in at91_adc_read_info_raw()
1813 if (chan->type == IIO_TEMP) in at91_adc_read_info_raw()
1815 at91_adc_writel(st, CHDR, BIT(chan->channel)); in at91_adc_read_info_raw()
1821 pm_runtime_mark_last_busy(st->dev); in at91_adc_read_info_raw()
1822 pm_runtime_put_autosuspend(st->dev); in at91_adc_read_info_raw()
1831 guard(mutex)(&st->lock); in at91_adc_read_info_locked()
1853 st->temp_st.saved_sample_rate = st->current_sample_rate; in at91_adc_temp_sensor_configure()
1854 st->temp_st.saved_oversampling = st->oversampling_ratio; in at91_adc_temp_sensor_configure()
1857 sample_rate = st->temp_st.saved_sample_rate; in at91_adc_temp_sensor_configure()
1858 oversampling_ratio = st->temp_st.saved_oversampling; in at91_adc_temp_sensor_configure()
1859 startup_time = st->soc_info.startup_time; in at91_adc_temp_sensor_configure()
1864 at91_adc_setup_samp_freq(st->indio_dev, sample_rate, startup_time, in at91_adc_temp_sensor_configure()
1873 struct at91_adc_temp_sensor_clb *clb = &st->soc_info.temp_sensor_clb; in at91_adc_read_temp()
1878 guard(mutex)(&st->lock); in at91_adc_read_temp()
1880 ret = pm_runtime_resume_and_get(st->dev); in at91_adc_read_temp()
1902 pm_runtime_mark_last_busy(st->dev); in at91_adc_read_temp()
1903 pm_runtime_put_autosuspend(st->dev); in at91_adc_read_temp()
1908 * Temp[milli] = p1[milli] + (vtemp * clb->p6 - clb->p4 * vbg)/ in at91_adc_read_temp()
1911 div1 = DIV_ROUND_CLOSEST_ULL(((u64)vtemp * clb->p6), vbg); in at91_adc_read_temp()
1913 div2 = DIV_ROUND_CLOSEST_ULL((u64)clb->p4, AT91_ADC_TS_VTEMP_DT); in at91_adc_read_temp()
1915 *val = clb->p1 + (int)div1 - (int)div2; in at91_adc_read_temp()
1930 return -EBUSY; in at91_adc_read_raw()
1937 *val = st->vref_uv / 1000; in at91_adc_read_raw()
1938 if (chan->differential) in at91_adc_read_raw()
1940 *val2 = chan->scan_type.realbits; in at91_adc_read_raw()
1944 if (chan->type != IIO_TEMP) in at91_adc_read_raw()
1945 return -EINVAL; in at91_adc_read_raw()
1947 return -EBUSY; in at91_adc_read_raw()
1959 *val = st->oversampling_ratio; in at91_adc_read_raw()
1963 return -EINVAL; in at91_adc_read_raw()
1977 if (val == st->oversampling_ratio) in at91_adc_write_raw()
1981 return -EBUSY; in at91_adc_write_raw()
1982 mutex_lock(&st->lock); in at91_adc_write_raw()
1985 mutex_unlock(&st->lock); in at91_adc_write_raw()
1989 if (val < st->soc_info.min_sample_rate || in at91_adc_write_raw()
1990 val > st->soc_info.max_sample_rate) in at91_adc_write_raw()
1991 return -EINVAL; in at91_adc_write_raw()
1994 return -EBUSY; in at91_adc_write_raw()
1995 mutex_lock(&st->lock); in at91_adc_write_raw()
1997 st->soc_info.startup_time, 0); in at91_adc_write_raw()
1998 mutex_unlock(&st->lock); in at91_adc_write_raw()
2002 return -EINVAL; in at91_adc_write_raw()
2015 *vals = (int *)st->soc_info.platform->oversampling_avail; in at91_adc_read_avail()
2017 *length = st->soc_info.platform->oversampling_avail_no; in at91_adc_read_avail()
2020 return -EINVAL; in at91_adc_read_avail()
2026 struct device *dev = &st->indio_dev->dev; in at91_adc_dma_init()
2029 unsigned int sample_size = st->soc_info.platform->nr_channels * 2; in at91_adc_dma_init()
2038 if (st->dma_st.dma_chan) in at91_adc_dma_init()
2041 st->dma_st.dma_chan = dma_request_chan(dev, "rx"); in at91_adc_dma_init()
2042 if (IS_ERR(st->dma_st.dma_chan)) { in at91_adc_dma_init()
2044 st->dma_st.dma_chan = NULL; in at91_adc_dma_init()
2048 st->dma_st.rx_buf = dma_alloc_coherent(st->dma_st.dma_chan->device->dev, in at91_adc_dma_init()
2050 &st->dma_st.rx_dma_buf, in at91_adc_dma_init()
2052 if (!st->dma_st.rx_buf) { in at91_adc_dma_init()
2059 config.src_addr = (phys_addr_t)(st->dma_st.phys_addr in at91_adc_dma_init()
2060 + st->soc_info.platform->layout->LCDR); in at91_adc_dma_init()
2065 if (dmaengine_slave_config(st->dma_st.dma_chan, &config)) { in at91_adc_dma_init()
2070 dev_info(dev, "using %s for rx DMA transfers\n", in at91_adc_dma_init()
2071 dma_chan_name(st->dma_st.dma_chan)); in at91_adc_dma_init()
2076 dma_free_coherent(st->dma_st.dma_chan->device->dev, pages * PAGE_SIZE, in at91_adc_dma_init()
2077 st->dma_st.rx_buf, st->dma_st.rx_dma_buf); in at91_adc_dma_init()
2079 dma_release_channel(st->dma_st.dma_chan); in at91_adc_dma_init()
2080 st->dma_st.dma_chan = NULL; in at91_adc_dma_init()
2087 struct device *dev = &st->indio_dev->dev; in at91_adc_dma_disable()
2089 unsigned int sample_size = st->soc_info.platform->nr_channels * 2; in at91_adc_dma_disable()
2094 if (!st->dma_st.dma_chan) in at91_adc_dma_disable()
2098 dmaengine_terminate_sync(st->dma_st.dma_chan); in at91_adc_dma_disable()
2100 dma_free_coherent(st->dma_st.dma_chan->device->dev, pages * PAGE_SIZE, in at91_adc_dma_disable()
2101 st->dma_st.rx_buf, st->dma_st.rx_dma_buf); in at91_adc_dma_disable()
2102 dma_release_channel(st->dma_st.dma_chan); in at91_adc_dma_disable()
2103 st->dma_st.dma_chan = NULL; in at91_adc_dma_disable()
2116 if (!st->selected_trig->hw_trig) { in at91_adc_set_watermark()
2117 dev_dbg(&indio_dev->dev, "we need hw trigger for DMA\n"); in at91_adc_set_watermark()
2121 dev_dbg(&indio_dev->dev, "new watermark is %u\n", val); in at91_adc_set_watermark()
2122 st->dma_st.watermark = val; in at91_adc_set_watermark()
2151 if (bitmap_subset(scan_mask, &st->touch_st.channels_bitmask, in at91_adc_update_scan_mode()
2152 st->soc_info.platform->max_index + 1)) in at91_adc_update_scan_mode()
2158 if (bitmap_intersects(&st->touch_st.channels_bitmask, scan_mask, in at91_adc_update_scan_mode()
2159 st->soc_info.platform->max_index + 1)) in at91_adc_update_scan_mode()
2160 return -EINVAL; in at91_adc_update_scan_mode()
2169 if (st->soc_info.platform->layout->EOC_IDR) in at91_adc_hw_init()
2179 at91_adc_setup_samp_freq(indio_dev, st->soc_info.min_sample_rate, in at91_adc_hw_init()
2180 st->soc_info.startup_time, 0); in at91_adc_hw_init()
2183 at91_adc_config_emr(st, st->oversampling_ratio, 0); in at91_adc_hw_init()
2192 return sysfs_emit(buf, "%d\n", !!st->dma_st.dma_chan); in at91_adc_get_fifo_state()
2201 return sysfs_emit(buf, "%d\n", st->dma_st.watermark); in at91_adc_get_watermark()
2236 if (st->selected_trig->hw_trig) in at91_adc_buffer_and_trigger_init()
2241 ret = devm_iio_triggered_buffer_setup_ext(&indio->dev, indio, in at91_adc_buffer_and_trigger_init()
2249 if (!st->selected_trig->hw_trig) in at91_adc_buffer_and_trigger_init()
2252 st->trig = at91_adc_allocate_trigger(indio, st->selected_trig->name); in at91_adc_buffer_and_trigger_init()
2253 if (IS_ERR(st->trig)) { in at91_adc_buffer_and_trigger_init()
2255 return PTR_ERR(st->trig); in at91_adc_buffer_and_trigger_init()
2262 st->dma_st.watermark = 1; in at91_adc_buffer_and_trigger_init()
2270 struct at91_adc_temp_sensor_clb *clb = &st->soc_info.temp_sensor_clb; in at91_adc_temp_sensor_init()
2276 if (!st->soc_info.platform->temp_sensor) in at91_adc_temp_sensor_init()
2283 if (ret != -ENOENT) in at91_adc_temp_sensor_init()
2295 ret = -EINVAL; in at91_adc_temp_sensor_init()
2300 clb->p1 = buf[AT91_ADC_TS_CLB_IDX_P1]; in at91_adc_temp_sensor_init()
2301 clb->p4 = buf[AT91_ADC_TS_CLB_IDX_P4]; in at91_adc_temp_sensor_init()
2302 clb->p6 = buf[AT91_ADC_TS_CLB_IDX_P6]; in at91_adc_temp_sensor_init()
2307 clb->p1 = clb->p1 * 1000; in at91_adc_temp_sensor_init()
2316 struct device *dev = &pdev->dev; in at91_adc_probe()
2323 indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*st)); in at91_adc_probe()
2325 return -ENOMEM; in at91_adc_probe()
2328 st->indio_dev = indio_dev; in at91_adc_probe()
2330 st->soc_info.platform = device_get_match_data(dev); in at91_adc_probe()
2332 ret = at91_adc_temp_sensor_init(st, &pdev->dev); in at91_adc_probe()
2335 num_channels = st->soc_info.platform->max_channels - 1; in at91_adc_probe()
2337 num_channels = st->soc_info.platform->max_channels; in at91_adc_probe()
2339 indio_dev->name = dev_name(&pdev->dev); in at91_adc_probe()
2340 indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE; in at91_adc_probe()
2341 indio_dev->info = &at91_adc_info; in at91_adc_probe()
2342 indio_dev->channels = *st->soc_info.platform->adc_channels; in at91_adc_probe()
2343 indio_dev->num_channels = num_channels; in at91_adc_probe()
2345 bitmap_set(&st->touch_st.channels_bitmask, in at91_adc_probe()
2346 st->soc_info.platform->touch_chan_x, 1); in at91_adc_probe()
2347 bitmap_set(&st->touch_st.channels_bitmask, in at91_adc_probe()
2348 st->soc_info.platform->touch_chan_y, 1); in at91_adc_probe()
2349 bitmap_set(&st->touch_st.channels_bitmask, in at91_adc_probe()
2350 st->soc_info.platform->touch_chan_p, 1); in at91_adc_probe()
2352 st->oversampling_ratio = 1; in at91_adc_probe()
2354 ret = device_property_read_u32(dev, "atmel,min-sample-rate-hz", in at91_adc_probe()
2355 &st->soc_info.min_sample_rate); in at91_adc_probe()
2357 dev_err(&pdev->dev, in at91_adc_probe()
2358 "invalid or missing value for atmel,min-sample-rate-hz\n"); in at91_adc_probe()
2362 ret = device_property_read_u32(dev, "atmel,max-sample-rate-hz", in at91_adc_probe()
2363 &st->soc_info.max_sample_rate); in at91_adc_probe()
2365 dev_err(&pdev->dev, in at91_adc_probe()
2366 "invalid or missing value for atmel,max-sample-rate-hz\n"); in at91_adc_probe()
2370 ret = device_property_read_u32(dev, "atmel,startup-time-ms", in at91_adc_probe()
2371 &st->soc_info.startup_time); in at91_adc_probe()
2373 dev_err(&pdev->dev, in at91_adc_probe()
2374 "invalid or missing value for atmel,startup-time-ms\n"); in at91_adc_probe()
2378 ret = device_property_read_u32(dev, "atmel,trigger-edge-type", in at91_adc_probe()
2381 dev_dbg(&pdev->dev, in at91_adc_probe()
2382 "atmel,trigger-edge-type not specified, only software trigger available\n"); in at91_adc_probe()
2385 st->selected_trig = NULL; in at91_adc_probe()
2388 for (i = 0; i < st->soc_info.platform->hw_trig_cnt + 1; i++) in at91_adc_probe()
2390 st->selected_trig = &at91_adc_trigger_list[i]; in at91_adc_probe()
2394 if (!st->selected_trig) { in at91_adc_probe()
2395 dev_err(&pdev->dev, "invalid external trigger edge value\n"); in at91_adc_probe()
2396 return -EINVAL; in at91_adc_probe()
2399 init_waitqueue_head(&st->wq_data_available); in at91_adc_probe()
2400 mutex_init(&st->lock); in at91_adc_probe()
2401 INIT_WORK(&st->touch_st.workq, at91_adc_workq_handler); in at91_adc_probe()
2403 st->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); in at91_adc_probe()
2404 if (IS_ERR(st->base)) in at91_adc_probe()
2405 return PTR_ERR(st->base); in at91_adc_probe()
2408 st->dma_st.phys_addr = res->start; in at91_adc_probe()
2410 st->irq = platform_get_irq(pdev, 0); in at91_adc_probe()
2411 if (st->irq < 0) in at91_adc_probe()
2412 return st->irq; in at91_adc_probe()
2414 st->per_clk = devm_clk_get(&pdev->dev, "adc_clk"); in at91_adc_probe()
2415 if (IS_ERR(st->per_clk)) in at91_adc_probe()
2416 return PTR_ERR(st->per_clk); in at91_adc_probe()
2418 st->reg = devm_regulator_get(&pdev->dev, "vddana"); in at91_adc_probe()
2419 if (IS_ERR(st->reg)) in at91_adc_probe()
2420 return PTR_ERR(st->reg); in at91_adc_probe()
2422 st->vref = devm_regulator_get(&pdev->dev, "vref"); in at91_adc_probe()
2423 if (IS_ERR(st->vref)) in at91_adc_probe()
2424 return PTR_ERR(st->vref); in at91_adc_probe()
2426 ret = devm_request_irq(&pdev->dev, st->irq, at91_adc_interrupt, 0, in at91_adc_probe()
2427 pdev->dev.driver->name, indio_dev); in at91_adc_probe()
2431 ret = regulator_enable(st->reg); in at91_adc_probe()
2435 ret = regulator_enable(st->vref); in at91_adc_probe()
2439 st->vref_uv = regulator_get_voltage(st->vref); in at91_adc_probe()
2440 if (st->vref_uv <= 0) { in at91_adc_probe()
2441 ret = -EINVAL; in at91_adc_probe()
2445 ret = clk_prepare_enable(st->per_clk); in at91_adc_probe()
2450 st->dev = &pdev->dev; in at91_adc_probe()
2451 pm_runtime_set_autosuspend_delay(st->dev, 500); in at91_adc_probe()
2452 pm_runtime_use_autosuspend(st->dev); in at91_adc_probe()
2453 pm_runtime_set_active(st->dev); in at91_adc_probe()
2454 pm_runtime_enable(st->dev); in at91_adc_probe()
2455 pm_runtime_get_noresume(st->dev); in at91_adc_probe()
2459 ret = at91_adc_buffer_and_trigger_init(&pdev->dev, indio_dev); in at91_adc_probe()
2463 if (dma_coerce_mask_and_coherent(&indio_dev->dev, DMA_BIT_MASK(32))) in at91_adc_probe()
2464 dev_info(&pdev->dev, "cannot set DMA mask to 32-bit\n"); in at91_adc_probe()
2470 if (st->selected_trig->hw_trig) in at91_adc_probe()
2471 dev_info(&pdev->dev, "setting up trigger as %s\n", in at91_adc_probe()
2472 st->selected_trig->name); in at91_adc_probe()
2474 dev_info(&pdev->dev, "version: %x\n", in at91_adc_probe()
2475 readl_relaxed(st->base + st->soc_info.platform->layout->VERSION)); in at91_adc_probe()
2477 pm_runtime_mark_last_busy(st->dev); in at91_adc_probe()
2478 pm_runtime_put_autosuspend(st->dev); in at91_adc_probe()
2485 pm_runtime_put_noidle(st->dev); in at91_adc_probe()
2486 pm_runtime_disable(st->dev); in at91_adc_probe()
2487 pm_runtime_set_suspended(st->dev); in at91_adc_probe()
2488 pm_runtime_dont_use_autosuspend(st->dev); in at91_adc_probe()
2489 clk_disable_unprepare(st->per_clk); in at91_adc_probe()
2491 regulator_disable(st->vref); in at91_adc_probe()
2493 regulator_disable(st->reg); in at91_adc_probe()
2506 pm_runtime_disable(st->dev); in at91_adc_remove()
2507 pm_runtime_set_suspended(st->dev); in at91_adc_remove()
2508 clk_disable_unprepare(st->per_clk); in at91_adc_remove()
2510 regulator_disable(st->vref); in at91_adc_remove()
2511 regulator_disable(st->reg); in at91_adc_remove()
2520 ret = pm_runtime_resume_and_get(st->dev); in at91_adc_suspend()
2535 pm_runtime_mark_last_busy(st->dev); in at91_adc_suspend()
2536 pm_runtime_put_noidle(st->dev); in at91_adc_suspend()
2537 clk_disable_unprepare(st->per_clk); in at91_adc_suspend()
2538 regulator_disable(st->vref); in at91_adc_suspend()
2539 regulator_disable(st->reg); in at91_adc_suspend()
2554 ret = regulator_enable(st->reg); in at91_adc_resume()
2558 ret = regulator_enable(st->vref); in at91_adc_resume()
2562 ret = clk_prepare_enable(st->per_clk); in at91_adc_resume()
2566 pm_runtime_get_noresume(st->dev); in at91_adc_resume()
2579 pm_runtime_mark_last_busy(st->dev); in at91_adc_resume()
2580 pm_runtime_put_autosuspend(st->dev); in at91_adc_resume()
2585 pm_runtime_mark_last_busy(st->dev); in at91_adc_resume()
2586 pm_runtime_put_noidle(st->dev); in at91_adc_resume()
2587 clk_disable_unprepare(st->per_clk); in at91_adc_resume()
2589 regulator_disable(st->vref); in at91_adc_resume()
2591 regulator_disable(st->reg); in at91_adc_resume()
2593 dev_err(&indio_dev->dev, "failed to resume\n"); in at91_adc_resume()
2602 clk_disable(st->per_clk); in at91_adc_runtime_suspend()
2612 return clk_enable(st->per_clk); in at91_adc_runtime_resume()
2623 .compatible = "atmel,sama5d2-adc",
2626 .compatible = "microchip,sama7g5-adc",
2638 .name = "at91-sama5d2_adc",