u8 width;
u16 cr, dma_width, dma_config;
u32 tranf_success = 1;
+ u8 full_duplex = 0;
/* Get current state information */
message = drv_data->cur_msg;
}
if (transfer->rx_buf != NULL) {
+ full_duplex = transfer->tx_buf != NULL;
drv_data->rx = transfer->rx_buf;
drv_data->rx_end = drv_data->rx + transfer->len;
dev_dbg(&drv_data->pdev->dev, "rx_buf is %p, rx_end is %p\n",
} else {
drv_data->len = transfer->len;
}
- dev_dbg(&drv_data->pdev->dev, "transfer: ",
- "drv_data->write is %p, chip->write is %p, null_wr is %p\n",
+ dev_dbg(&drv_data->pdev->dev,
+ "transfer: drv_data->write is %p, chip->write is %p, null_wr is %p\n",
drv_data->write, chip->write, null_writer);
/* speed and width has been set on per message */
* successful use different way to r/w according to
* drv_data->cur_chip->enable_dma
*/
- if (drv_data->cur_chip->enable_dma && drv_data->len > 6) {
+ if (!full_duplex && drv_data->cur_chip->enable_dma
+ && drv_data->len > 6) {
disable_dma(drv_data->dma_channel);
clear_dma_irqstat(drv_data->dma_channel);
/* IO mode write then read */
dev_dbg(&drv_data->pdev->dev, "doing IO transfer\n");
- if (drv_data->tx != NULL && drv_data->rx != NULL) {
+ if (full_duplex) {
/* full duplex mode */
BUG_ON((drv_data->tx_end - drv_data->tx) !=
(drv_data->rx_end - drv_data->rx));
goto out_error_queue_alloc;
}
+ status = peripheral_request_list(drv_data->pin_req, DRV_NAME);
+ if (status != 0) {
+ dev_err(&pdev->dev, ": Requesting Peripherals failed\n");
+ goto out_error_queue_alloc;
+ }
+
/* Register with the SPI framework */
platform_set_drvdata(pdev, drv_data);
status = spi_register_master(master);
goto out_error_queue_alloc;
}
- status = peripheral_request_list(drv_data->pin_req, DRV_NAME);
- if (status != 0) {
- dev_err(&pdev->dev, ": Requesting Peripherals failed\n");
- goto out_error;
- }
-
dev_info(dev, "%s, Version %s, regs_base@%p, dma channel@%d\n",
DRV_DESC, DRV_VERSION, drv_data->regs_base,
drv_data->dma_channel);
iounmap((void *) drv_data->regs_base);
out_error_ioremap:
out_error_get_res:
-out_error:
spi_master_put(master);
return status;
#define bfin5xx_spi_resume NULL
#endif /* CONFIG_PM */
-MODULE_ALIAS("bfin-spi-master"); /* for platform bus hotplug */
+MODULE_ALIAS("platform:bfin-spi");
static struct platform_driver bfin5xx_spi_driver = {
.driver = {
.name = DRV_NAME,