dmaengine: edma: DT: Change memcpy channel array from 16bit to 32bit type

This change makes the DT file to be easier to read since the memcpy
channels array does not need the '/bits/ 16' to be specified, which might
confuse some people.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

Documentation/devicetree/bindings/dma/ti-edma.txt

@@ -22,8 +22,7 @@ Required properties:
 Optional properties:
 - ti,hwmods:	Name of the hwmods associated to the eDMA CC
 - ti,edma-memcpy-channels: List of channels allocated to be used for memcpy, iow
-		these channels will be SW triggered channels. The list must
-		contain 16 bits numbers, see example.
+		these channels will be SW triggered channels. See example.
 - ti,edma-reserved-slot-ranges: PaRAM slot ranges which should not be used by
 		the driver, they are allocated to be used by for example the
 		DSP. See example.
@@ -56,7 +55,7 @@ edma: edma@49000000 {
 	ti,tptcs = <&edma_tptc0 7>, <&edma_tptc1 7>, <&edma_tptc2 0>;
 
 	/* Channel 20 and 21 is allocated for memcpy */
-	ti,edma-memcpy-channels = /bits/ 16 <20 21>;
+	ti,edma-memcpy-channels = <20 21>;
 	/* The following PaRAM slots are reserved: 35-45 and 100-110 */
 	ti,edma-reserved-slot-ranges = /bits/ 16 <35 10>,
 				       /bits/ 16 <100 10>;

drivers/dma/edma.c

@@ -1752,16 +1752,14 @@ static enum dma_status edma_tx_status(struct dma_chan *chan,
 	return ret;
 }
 
-static bool edma_is_memcpy_channel(int ch_num, u16 *memcpy_channels)
+static bool edma_is_memcpy_channel(int ch_num, s32 *memcpy_channels)
 {
-	s16 *memcpy_ch = memcpy_channels;
-
 	if (!memcpy_channels)
 		return false;
-	while (*memcpy_ch != -1) {
-		if (*memcpy_ch == ch_num)
+	while (*memcpy_channels != -1) {
+		if (*memcpy_channels == ch_num)
 			return true;
-		memcpy_ch++;
+		memcpy_channels++;
 	}
 	return false;
 }
@@ -1775,7 +1773,7 @@ static void edma_dma_init(struct edma_cc *ecc, bool legacy_mode)
 {
 	struct dma_device *s_ddev = &ecc->dma_slave;
 	struct dma_device *m_ddev = NULL;
-	s16 *memcpy_channels = ecc->info->memcpy_channels;
+	s32 *memcpy_channels = ecc->info->memcpy_channels;
 	int i, j;
 
 	dma_cap_zero(s_ddev->cap_mask);
@@ -1996,16 +1994,16 @@ static struct edma_soc_info *edma_setup_info_from_dt(struct device *dev,
 	prop = of_find_property(dev->of_node, "ti,edma-memcpy-channels", &sz);
 	if (prop) {
 		const char pname[] = "ti,edma-memcpy-channels";
-		size_t nelm = sz / sizeof(s16);
-		s16 *memcpy_ch;
+		size_t nelm = sz / sizeof(s32);
+		s32 *memcpy_ch;
 
-		memcpy_ch = devm_kcalloc(dev, nelm + 1, sizeof(s16),
+		memcpy_ch = devm_kcalloc(dev, nelm + 1, sizeof(s32),
 					 GFP_KERNEL);
 		if (!memcpy_ch)
 			return ERR_PTR(-ENOMEM);
 
-		ret = of_property_read_u16_array(dev->of_node, pname,
-						 (u16 *)memcpy_ch, nelm);
+		ret = of_property_read_u32_array(dev->of_node, pname,
+						 (u32 *)memcpy_ch, nelm);
 		if (ret)
 			return ERR_PTR(ret);
 

include/linux/platform_data/edma.h

@@ -72,7 +72,7 @@ struct edma_soc_info {
 	struct edma_rsv_info	*rsv;
 
 	/* List of channels allocated for memcpy, terminated with -1 */
-	s16			*memcpy_channels;
+	s32			*memcpy_channels;
 
 	s8	(*queue_priority_mapping)[2];
 	const s16	(*xbar_chans)[2];