215 	struct ser_req *req;  in ad7877_read()  local
218 	req = kzalloc(sizeof *req, GFP_KERNEL);  in ad7877_read()
219 	if (!req)  in ad7877_read()
222 	spi_message_init(&req->msg);  in ad7877_read()
224 	req->command = (u16) (AD7877_WRITEADD(AD7877_REG_CTRL1) |  in ad7877_read()
226 	req->xfer[0].tx_buf = &req->command;  in ad7877_read()
227 	req->xfer[0].len = 2;  in ad7877_read()
228 	req->xfer[0].cs_change = 1;  in ad7877_read()
230 	req->xfer[1].rx_buf = &req->sample;  in ad7877_read()
231 	req->xfer[1].len = 2;  in ad7877_read()
233 	spi_message_add_tail(&req->xfer[0], &req->msg);  in ad7877_read()
234 	spi_message_add_tail(&req->xfer[1], &req->msg);  in ad7877_read()
236 	status = spi_sync(spi, &req->msg);  in ad7877_read()
237 	ret = status ? : req->sample;  in ad7877_read()
239 	kfree(req);  in ad7877_read()
246 	struct ser_req *req;  in ad7877_write()  local
249 	req = kzalloc(sizeof *req, GFP_KERNEL);  in ad7877_write()
250 	if (!req)  in ad7877_write()
253 	spi_message_init(&req->msg);  in ad7877_write()
255 	req->command = (u16) (AD7877_WRITEADD(reg) | (val & MAX_12BIT));  in ad7877_write()
256 	req->xfer[0].tx_buf = &req->command;  in ad7877_write()
257 	req->xfer[0].len = 2;  in ad7877_write()
259 	spi_message_add_tail(&req->xfer[0], &req->msg);  in ad7877_write()
261 	status = spi_sync(spi, &req->msg);  in ad7877_write()
263 	kfree(req);  in ad7877_write()
271 	struct ser_req *req;  in ad7877_read_adc()  local
276 	req = kzalloc(sizeof *req, GFP_KERNEL);  in ad7877_read_adc()
277 	if (!req)  in ad7877_read_adc()
280 	spi_message_init(&req->msg);  in ad7877_read_adc()
283 	req->ref_on = AD7877_WRITEADD(AD7877_REG_CTRL2) |  in ad7877_read_adc()
288 	req->reset = AD7877_WRITEADD(AD7877_REG_CTRL1) | AD7877_MODE_NOC;  in ad7877_read_adc()
290 	req->command = (u16) command;  in ad7877_read_adc()
292 	req->xfer[0].tx_buf = &req->reset;  in ad7877_read_adc()
293 	req->xfer[0].len = 2;  in ad7877_read_adc()
294 	req->xfer[0].cs_change = 1;  in ad7877_read_adc()
296 	req->xfer[1].tx_buf = &req->ref_on;  in ad7877_read_adc()
297 	req->xfer[1].len = 2;  in ad7877_read_adc()
298 	req->xfer[1].delay_usecs = ts->vref_delay_usecs;  in ad7877_read_adc()
299 	req->xfer[1].cs_change = 1;  in ad7877_read_adc()
301 	req->xfer[2].tx_buf = &req->command;  in ad7877_read_adc()
302 	req->xfer[2].len = 2;  in ad7877_read_adc()
303 	req->xfer[2].delay_usecs = ts->vref_delay_usecs;  in ad7877_read_adc()
304 	req->xfer[2].cs_change = 1;  in ad7877_read_adc()
306 	req->xfer[3].rx_buf = &req->sample;  in ad7877_read_adc()
307 	req->xfer[3].len = 2;  in ad7877_read_adc()
308 	req->xfer[3].cs_change = 1;  in ad7877_read_adc()
310 	req->xfer[4].tx_buf = &ts->cmd_crtl2;	/*REF OFF*/  in ad7877_read_adc()
311 	req->xfer[4].len = 2;  in ad7877_read_adc()
312 	req->xfer[4].cs_change = 1;  in ad7877_read_adc()
314 	req->xfer[5].tx_buf = &ts->cmd_crtl1;	/*DEFAULT*/  in ad7877_read_adc()
315 	req->xfer[5].len = 2;  in ad7877_read_adc()
321 		spi_message_add_tail(&req->xfer[i], &req->msg);  in ad7877_read_adc()
323 	status = spi_sync(spi, &req->msg);  in ad7877_read_adc()
324 	sample = req->sample;  in ad7877_read_adc()
326 	kfree(req);  in ad7877_read_adc()