spi: dw: Propagate struct device pointer to ->dma_init() callback

In some cases, one of which is coming soon, we would like to have
a struct device pointer to request DMA channel. For this purpose
propagate it to ->dma_init() callback in DMA ops.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200506153025.21441-7-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-dw-mid.c

@@ -34,7 +34,7 @@ static bool mid_spi_dma_chan_filter(struct dma_chan *chan, void *param)
 	return true;
 }
 
-static int mid_spi_dma_init_mfld(struct dw_spi *dws)
+static int mid_spi_dma_init_mfld(struct device *dev, struct dw_spi *dws)
 {
 	struct pci_dev *dma_dev;
 	struct dw_dma_slave *tx = dws->dma_tx;

drivers/spi/spi-dw.c

@@ -506,7 +506,7 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws)
 	spi_hw_init(dev, dws);
 
 	if (dws->dma_ops && dws->dma_ops->dma_init) {
-		ret = dws->dma_ops->dma_init(dws);
+		ret = dws->dma_ops->dma_init(dev, dws);
 		if (ret) {
 			dev_warn(dev, "DMA init failed\n");
 			dws->dma_inited = 0;

drivers/spi/spi-dw.h

@@ -100,7 +100,7 @@ enum dw_ssi_type {
 
 struct dw_spi;
 struct dw_spi_dma_ops {
-	int (*dma_init)(struct dw_spi *dws);
+	int (*dma_init)(struct device *dev, struct dw_spi *dws);
 	void (*dma_exit)(struct dw_spi *dws);
 	int (*dma_setup)(struct dw_spi *dws, struct spi_transfer *xfer);
 	bool (*can_dma)(struct spi_controller *master, struct spi_device *spi,