601 	struct at91_adc_dma		dma_st;  member
1155 	if (st->dma_st.dma_chan)  in at91_adc_reenable_trigger()
1176 	status = dmaengine_tx_status(st->dma_st.dma_chan,  in at91_adc_dma_size_done()
1177 				     st->dma_st.dma_chan->cookie,  in at91_adc_dma_size_done()
1183 	i = st->dma_st.rx_buf_sz - state.residue;  in at91_adc_dma_size_done()
1186 	if (i >= st->dma_st.buf_idx)  in at91_adc_dma_size_done()
1187 		size = i - st->dma_st.buf_idx;  in at91_adc_dma_size_done()
1189 		size = st->dma_st.rx_buf_sz + i - st->dma_st.buf_idx;  in at91_adc_dma_size_done()
1208 	if (!st->dma_st.dma_chan)  in at91_adc_dma_start()
1212 	st->dma_st.buf_idx = 0;  in at91_adc_dma_start()
1218 	st->dma_st.rx_buf_sz = 0;  in at91_adc_dma_start()
1228 		st->dma_st.rx_buf_sz += chan->scan_type.storagebits / 8;  in at91_adc_dma_start()
1230 	st->dma_st.rx_buf_sz *= st->dma_st.watermark;  in at91_adc_dma_start()
1233 	desc = dmaengine_prep_dma_cyclic(st->dma_st.dma_chan,  in at91_adc_dma_start()
1234 					 st->dma_st.rx_dma_buf,  in at91_adc_dma_start()
1235 					 st->dma_st.rx_buf_sz,  in at91_adc_dma_start()
1236 					 st->dma_st.rx_buf_sz / 2,  in at91_adc_dma_start()
1251 		dmaengine_terminate_async(st->dma_st.dma_chan);  in at91_adc_dma_start()
1258 	dma_async_issue_pending(st->dma_st.dma_chan);  in at91_adc_dma_start()
1261 	st->dma_st.dma_ts = iio_get_time_ns(indio_dev);  in at91_adc_dma_start()
1272 	if (st->dma_st.dma_chan)  in at91_adc_buffer_check_use_irq()
1379 		if (st->dma_st.dma_chan)  in at91_adc_buffer_postdisable()
1390 	if (st->dma_st.dma_chan)  in at91_adc_buffer_postdisable()
1391 		dmaengine_terminate_sync(st->dma_st.dma_chan);  in at91_adc_buffer_postdisable()
1496 	sample_size = div_s64(st->dma_st.rx_buf_sz, st->dma_st.watermark);  in at91_adc_trigger_handler_dma()
1504 	interval = div_s64((ns - st->dma_st.dma_ts), sample_count);  in at91_adc_trigger_handler_dma()
1512 					&st->dma_st.rx_buf[st->dma_st.buf_idx],  in at91_adc_trigger_handler_dma()
1516 				(st->dma_st.rx_buf + st->dma_st.buf_idx),  in at91_adc_trigger_handler_dma()
1517 				(st->dma_st.dma_ts + interval * sample_index));  in at91_adc_trigger_handler_dma()
1521 		st->dma_st.buf_idx += sample_size;  in at91_adc_trigger_handler_dma()
1523 		if (st->dma_st.buf_idx >= st->dma_st.rx_buf_sz)  in at91_adc_trigger_handler_dma()
1524 			st->dma_st.buf_idx = 0;  in at91_adc_trigger_handler_dma()
1528 	st->dma_st.dma_ts = iio_get_time_ns(indio_dev);  in at91_adc_trigger_handler_dma()
1544 	if (st->dma_st.dma_chan)  in at91_adc_trigger_handler()
1720 	} else if (iio_buffer_enabled(indio) && st->dma_st.dma_chan) {  in at91_adc_interrupt()
2030 	if (st->dma_st.dma_chan)  in at91_adc_dma_init()
2033 	st->dma_st.dma_chan = dma_request_chan(dev, "rx");  in at91_adc_dma_init()
2034 	if (IS_ERR(st->dma_st.dma_chan))  {  in at91_adc_dma_init()
2036 		st->dma_st.dma_chan = NULL;  in at91_adc_dma_init()
2040 	st->dma_st.rx_buf = dma_alloc_coherent(st->dma_st.dma_chan->device->dev,  in at91_adc_dma_init()
2042 					       &st->dma_st.rx_dma_buf,  in at91_adc_dma_init()
2044 	if (!st->dma_st.rx_buf) {  in at91_adc_dma_init()
2051 	config.src_addr = (phys_addr_t)(st->dma_st.phys_addr  in at91_adc_dma_init()
2057 	if (dmaengine_slave_config(st->dma_st.dma_chan, &config)) {  in at91_adc_dma_init()
2063 		 dma_chan_name(st->dma_st.dma_chan));  in at91_adc_dma_init()
2068 	dma_free_coherent(st->dma_st.dma_chan->device->dev, pages * PAGE_SIZE,  in at91_adc_dma_init()
2069 			  st->dma_st.rx_buf, st->dma_st.rx_dma_buf);  in at91_adc_dma_init()
2071 	dma_release_channel(st->dma_st.dma_chan);  in at91_adc_dma_init()
2072 	st->dma_st.dma_chan = NULL;  in at91_adc_dma_init()
2086 	if (!st->dma_st.dma_chan)  in at91_adc_dma_disable()
2090 	dmaengine_terminate_sync(st->dma_st.dma_chan);  in at91_adc_dma_disable()
2092 	dma_free_coherent(st->dma_st.dma_chan->device->dev, pages * PAGE_SIZE,  in at91_adc_dma_disable()
2093 			  st->dma_st.rx_buf, st->dma_st.rx_dma_buf);  in at91_adc_dma_disable()
2094 	dma_release_channel(st->dma_st.dma_chan);  in at91_adc_dma_disable()
2095 	st->dma_st.dma_chan = NULL;  in at91_adc_dma_disable()
2114 	st->dma_st.watermark = val;  in at91_adc_set_watermark()
2184 	return sysfs_emit(buf, "%d\n", !!st->dma_st.dma_chan);  in at91_adc_get_fifo_state()
2193 	return sysfs_emit(buf, "%d\n", st->dma_st.watermark);  in at91_adc_get_watermark()
2254 	st->dma_st.watermark = 1;  in at91_adc_buffer_and_trigger_init()
2400 	st->dma_st.phys_addr = res->start;  in at91_adc_probe()