dmaengine: ti: convert k3-udma to module

Currently k3-udma driver is built as separate platform drivers with a
shared probe and identical code path, just differnet platform data.

To enable to build as module, convert the separate platform driver
into a single module_platform_driver with the data selection done via
compatible string and of_match.  The separate of_match tables are also
combined into a single table to avoid the multiple calls to
of_match_node()

Since all modern TI platforms using this are DT enabled, the removal
of separate platform_drivers should have no functional change.
Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20220929234820.940048-3-khilman@baylibre.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/ti/Kconfig

@@ -35,7 +35,7 @@ config DMA_OMAP
 	  DMA engine is found on OMAP and DRA7xx parts.
 
 config TI_K3_UDMA
-	bool "Texas Instruments UDMA support"
+	tristate "Texas Instruments UDMA support"
 	depends on ARCH_K3
 	depends on TI_SCI_PROTOCOL
 	depends on TI_SCI_INTA_IRQCHIP
@@ -48,7 +48,7 @@ config TI_K3_UDMA
 	  DMA engine is used in AM65x and j721e.
 
 config TI_K3_UDMA_GLUE_LAYER
-	bool "Texas Instruments UDMA Glue layer for non DMAengine users"
+	tristate "Texas Instruments UDMA Glue layer for non DMAengine users"
 	depends on ARCH_K3
 	depends on TI_K3_UDMA
 	help

drivers/dma/ti/k3-udma-glue.c

@@ -6,6 +6,7 @@
  *
  */
 
+#include <linux/module.h>
 #include <linux/atomic.h>
 #include <linux/delay.h>
 #include <linux/dma-mapping.h>
@@ -1433,4 +1434,6 @@ static int __init k3_udma_glue_class_init(void)
 {
 	return class_register(&k3_udma_glue_devclass);
 }
-arch_initcall(k3_udma_glue_class_init);
+
+module_init(k3_udma_glue_class_init);
+MODULE_LICENSE("GPL v2");

drivers/dma/ti/k3-udma.c

@@ -5,6 +5,7 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/delay.h>
 #include <linux/dmaengine.h>
 #include <linux/dma-mapping.h>
@@ -4335,18 +4336,10 @@ static const struct of_device_id udma_of_match[] = {
 		.compatible = "ti,j721e-navss-mcu-udmap",
 		.data = &j721e_mcu_data,
 	},
-	{ /* Sentinel */ },
-};
-
-static const struct of_device_id bcdma_of_match[] = {
 	{
 		.compatible = "ti,am64-dmss-bcdma",
 		.data = &am64_bcdma_data,
 	},
-	{ /* Sentinel */ },
-};
-
-static const struct of_device_id pktdma_of_match[] = {
 	{
 		.compatible = "ti,am64-dmss-pktdma",
 		.data = &am64_pktdma_data,
@@ -5271,14 +5264,9 @@ static int udma_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	match = of_match_node(udma_of_match, dev->of_node);
-	if (!match)
-		match = of_match_node(bcdma_of_match, dev->of_node);
 	if (!match) {
-		match = of_match_node(pktdma_of_match, dev->of_node);
-		if (!match) {
-			dev_err(dev, "No compatible match found\n");
-			return -ENODEV;
-		}
+		dev_err(dev, "No compatible match found\n");
+		return -ENODEV;
 	}
 	ud->match_data = match->data;
 
@@ -5511,27 +5499,9 @@ static struct platform_driver udma_driver = {
 	},
 	.probe		= udma_probe,
 };
-builtin_platform_driver(udma_driver);
 
-static struct platform_driver bcdma_driver = {
-	.driver = {
-		.name	= "ti-bcdma",
-		.of_match_table = bcdma_of_match,
-		.suppress_bind_attrs = true,
-	},
-	.probe		= udma_probe,
-};
-builtin_platform_driver(bcdma_driver);
-
-static struct platform_driver pktdma_driver = {
-	.driver = {
-		.name	= "ti-pktdma",
-		.of_match_table = pktdma_of_match,
-		.suppress_bind_attrs = true,
-	},
-	.probe		= udma_probe,
-};
-builtin_platform_driver(pktdma_driver);
+module_platform_driver(udma_driver);
+MODULE_LICENSE("GPL v2");
 
 /* Private interfaces to UDMA */
 #include "k3-udma-private.c"