dmaengine: mxs: rename custom flag

The mxs dma driver uses the flags parameter in dmaengine_prep_slave_sg() for
custom flags, but still uses the dmaengine specific names of the flags.
Do a little bit better and at least give the flag a custom name.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

drivers/dma/mxs-dma.c

@@ -541,7 +541,7 @@ static struct dma_async_tx_descriptor *mxs_dma_prep_slave_sg(
 		ccw->bits = 0;
 		ccw->bits |= CCW_IRQ;
 		ccw->bits |= CCW_DEC_SEM;
-		if (flags & DMA_CTRL_ACK)
+		if (flags & MXS_DMA_CTRL_WAIT4END)
 			ccw->bits |= CCW_WAIT4END;
 		ccw->bits |= CCW_HALT_ON_TERM;
 		ccw->bits |= CCW_TERM_FLUSH;
@@ -573,7 +573,7 @@ static struct dma_async_tx_descriptor *mxs_dma_prep_slave_sg(
 				ccw->bits &= ~CCW_CHAIN;
 				ccw->bits |= CCW_IRQ;
 				ccw->bits |= CCW_DEC_SEM;
-				if (flags & DMA_CTRL_ACK)
+				if (flags & MXS_DMA_CTRL_WAIT4END)
 					ccw->bits |= CCW_WAIT4END;
 			}
 		}

drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c

@@ -926,7 +926,8 @@ static int gpmi_send_command(struct gpmi_nand_data *this)
 	sg_init_one(sgl, this->cmd_buffer, this->command_length);
 	dma_map_sg(this->dev, sgl, 1, DMA_TO_DEVICE);
 	desc = dmaengine_prep_slave_sg(channel,
-				sgl, 1, DMA_MEM_TO_DEV, DMA_CTRL_ACK);
+				sgl, 1, DMA_MEM_TO_DEV,
+				MXS_DMA_CTRL_WAIT4END);
 	if (!desc)
 		return -EINVAL;
 
@@ -996,7 +997,8 @@ static int gpmi_send_data(struct gpmi_nand_data *this, const void *buf, int len)
 	/* [2] send DMA request */
 	prepare_data_dma(this, buf, len, DMA_TO_DEVICE);
 	desc = dmaengine_prep_slave_sg(channel, &this->data_sgl,
-					1, DMA_MEM_TO_DEV, DMA_CTRL_ACK);
+					1, DMA_MEM_TO_DEV,
+					MXS_DMA_CTRL_WAIT4END);
 	if (!desc)
 		return -EINVAL;
 
@@ -1033,7 +1035,8 @@ static int gpmi_read_data(struct gpmi_nand_data *this, void *buf, int len)
 	/* [2] : send DMA request */
 	direct = prepare_data_dma(this, buf, len, DMA_FROM_DEVICE);
 	desc = dmaengine_prep_slave_sg(channel, &this->data_sgl,
-					1, DMA_DEV_TO_MEM, DMA_CTRL_ACK);
+					1, DMA_DEV_TO_MEM,
+					MXS_DMA_CTRL_WAIT4END);
 	if (!desc)
 		return -EINVAL;
 
@@ -1083,7 +1086,8 @@ static int gpmi_send_page(struct gpmi_nand_data *this, dma_addr_t payload,
 	pio[5] = auxiliary;
 
 	desc = mxs_dmaengine_prep_pio(channel, pio, ARRAY_SIZE(pio),
-				      DMA_TRANS_NONE, DMA_CTRL_ACK);
+				      DMA_TRANS_NONE,
+				      MXS_DMA_CTRL_WAIT4END);
 	if (!desc)
 		return -EINVAL;
 
@@ -1140,7 +1144,8 @@ static int gpmi_read_page(struct gpmi_nand_data *this, dma_addr_t payload,
 	pio[4] = payload;
 	pio[5] = auxiliary;
 	desc = mxs_dmaengine_prep_pio(channel, pio, ARRAY_SIZE(pio),
-				      DMA_TRANS_NONE, DMA_CTRL_ACK);
+				      DMA_TRANS_NONE,
+				      MXS_DMA_CTRL_WAIT4END);
 	if (!desc)
 		return -EINVAL;
 
@@ -1157,7 +1162,7 @@ static int gpmi_read_page(struct gpmi_nand_data *this, dma_addr_t payload,
 	pio[1] = 0;
 	pio[2] = 0; /* clear GPMI_HW_GPMI_ECCCTRL, disable the BCH. */
 	desc = mxs_dmaengine_prep_pio(channel, pio, 3, DMA_TRANS_NONE,
-				      DMA_CTRL_ACK);
+				      MXS_DMA_CTRL_WAIT4END);
 	if (!desc)
 		return -EINVAL;
 

include/linux/dma/mxs-dma.h

@@ -4,6 +4,8 @@
 
 #include <linux/dmaengine.h>
 
+#define MXS_DMA_CTRL_WAIT4END	BIT(31)
+
 /*
  * The mxs dmaengine can do PIO transfers. We pass a pointer to the PIO words
  * in the second argument to dmaengine_prep_slave_sg when the direction is