1 // SPDX-License-Identifier: GPL-2.0
19 #include <linux/iio/buffer-dmaengine.h>
20 #include <linux/iio/iio.h>
22 #include <dt-bindings/iio/adc/adi,ad7606.h>
64 		dev_err(&spi->dev, "SPI read error\n");  in ad7606_spi_read_block()
102 	struct spi_device *spi = to_spi_device(st->dev);  in ad7606_spi_reg_read()
105 			.tx_buf = &st->d16[0],  in ad7606_spi_reg_read()
109 			.rx_buf = &st->d16[1],  in ad7606_spi_reg_read()
115 	st->d16[0] = cpu_to_be16(st->bops->rd_wr_cmd(addr, 0) << 8);  in ad7606_spi_reg_read()
121 	return be16_to_cpu(st->d16[1]);  in ad7606_spi_reg_read()
128 	struct spi_device *spi = to_spi_device(st->dev);  in ad7606_spi_reg_write()
130 	st->d16[0] = cpu_to_be16((st->bops->rd_wr_cmd(addr, 1) << 8) |  in ad7606_spi_reg_write()
133 	return spi_write(spi, &st->d16[0], sizeof(st->d16[0]));  in ad7606_spi_reg_write()
141 	return st->bops->reg_write(st, AD7606_CONFIGURATION_REGISTER,  in ad7606b_sw_mode_config()
154 	struct spi_bus_data *bus_data = st->bus_data;  in ad7606_spi_offload_buffer_postenable()
155 	struct spi_transfer *xfer = &bus_data->offload_xfer;  in ad7606_spi_offload_buffer_postenable()
156 	struct spi_device *spi = to_spi_device(st->dev);  in ad7606_spi_offload_buffer_postenable()
162 	scan_type = &indio_dev->channels[0].scan_type;  in ad7606_spi_offload_buffer_postenable()
164 	xfer->bits_per_word = scan_type->realbits;  in ad7606_spi_offload_buffer_postenable()
165 	xfer->offload_flags = SPI_OFFLOAD_XFER_RX_STREAM;  in ad7606_spi_offload_buffer_postenable()
167 	 * Using SPI offload, storagebits are related to the spi-engine  in ad7606_spi_offload_buffer_postenable()
171 	xfer->len = (scan_type->realbits > 16 ? 4 : 2) *  in ad7606_spi_offload_buffer_postenable()
172 		    st->chip_info->num_adc_channels;  in ad7606_spi_offload_buffer_postenable()
174 	spi_message_init_with_transfers(&bus_data->offload_msg, xfer, 1);  in ad7606_spi_offload_buffer_postenable()
175 	bus_data->offload_msg.offload = bus_data->offload;  in ad7606_spi_offload_buffer_postenable()
177 	ret = spi_optimize_message(spi, &bus_data->offload_msg);  in ad7606_spi_offload_buffer_postenable()
179 		dev_err(st->dev, "failed to prepare offload, err: %d\n", ret);  in ad7606_spi_offload_buffer_postenable()
183 	ret = spi_offload_trigger_enable(bus_data->offload,  in ad7606_spi_offload_buffer_postenable()
184 					 bus_data->offload_trigger,  in ad7606_spi_offload_buffer_postenable()
196 	spi_offload_trigger_disable(bus_data->offload,  in ad7606_spi_offload_buffer_postenable()
197 				    bus_data->offload_trigger);  in ad7606_spi_offload_buffer_postenable()
200 	spi_unoptimize_message(&bus_data->offload_msg);  in ad7606_spi_offload_buffer_postenable()
208 	struct spi_bus_data *bus_data = st->bus_data;  in ad7606_spi_offload_buffer_predisable()
215 	spi_offload_trigger_disable(bus_data->offload,  in ad7606_spi_offload_buffer_predisable()
216 				    bus_data->offload_trigger);  in ad7606_spi_offload_buffer_predisable()
217 	spi_unoptimize_message(&bus_data->offload_msg);  in ad7606_spi_offload_buffer_predisable()
252 		return -EINVAL;  in ad7606_spi_offload_trigger_request()
261 	if (config->type != SPI_OFFLOAD_TRIGGER_DATA_READY)  in ad7606_spi_offload_trigger_validate()
262 		return -EINVAL;  in ad7606_spi_offload_trigger_validate()
289 		return -ENOMEM;  in ad7606_spi_offload_probe()
290 	st->bus_data = bus_data;  in ad7606_spi_offload_probe()
292 	bus_data->offload = devm_spi_offload_get(dev, spi,  in ad7606_spi_offload_probe()
294 	ret = PTR_ERR_OR_ZERO(bus_data->offload);  in ad7606_spi_offload_probe()
295 	if (ret && ret != -ENODEV)  in ad7606_spi_offload_probe()
298 	if (ret == -ENODEV)  in ad7606_spi_offload_probe()
306 	bus_data->offload_trigger = devm_spi_offload_trigger_get(dev,  in ad7606_spi_offload_probe()
307 		bus_data->offload, SPI_OFFLOAD_TRIGGER_DATA_READY);  in ad7606_spi_offload_probe()
308 	if (IS_ERR(bus_data->offload_trigger))  in ad7606_spi_offload_probe()
309 		return dev_err_probe(dev, PTR_ERR(bus_data->offload_trigger),  in ad7606_spi_offload_probe()
312 	/* TODO: PWM setup should be ok, done for the backend. PWM mutex ? */  in ad7606_spi_offload_probe()
314 							     bus_data->offload);  in ad7606_spi_offload_probe()
326 	indio_dev->setup_ops = &ad7606_offload_buffer_setup_ops;  in ad7606_spi_offload_probe()
328 	st->offload_en = true;  in ad7606_spi_offload_probe()
338 	if (st->offload_en) {  in ad7606_spi_update_scan_mode()
339 		unsigned int num_adc_ch = st->chip_info->num_adc_channels;  in ad7606_spi_update_scan_mode()
349 			return -EINVAL;  in ad7606_spi_update_scan_mode()
461 	return ad7606_probe(&spi->dev, spi->irq, NULL,  in ad7606_spi_probe()
462 			    bus_info->chip_info, bus_info->bops);  in ad7606_spi_probe()
466 	{ "ad7605-4", (kernel_ulong_t)&ad7605_4_bus_info },
467 	{ "ad7606-4", (kernel_ulong_t)&ad7606_4_bus_info },
468 	{ "ad7606-6", (kernel_ulong_t)&ad7606_6_bus_info },
469 	{ "ad7606-8", (kernel_ulong_t)&ad7606_8_bus_info },
471 	{ "ad7606c-16", (kernel_ulong_t)&ad7606c_16_bus_info },
472 	{ "ad7606c-18", (kernel_ulong_t)&ad7606c_18_bus_info },
482 	{ .compatible = "adi,ad7605-4", .data = &ad7605_4_bus_info },
483 	{ .compatible = "adi,ad7606-4", .data = &ad7606_4_bus_info },
484 	{ .compatible = "adi,ad7606-6", .data = &ad7606_6_bus_info },
485 	{ .compatible = "adi,ad7606-8", .data = &ad7606_8_bus_info },
487 	{ .compatible = "adi,ad7606c-16", .data = &ad7606c_16_bus_info },
488 	{ .compatible = "adi,ad7606c-18", .data = &ad7606c_18_bus_info },