dmaengine: imx-sdma: Remove platform data support

Since 5.10-rc1, i.MX has been converted to a devicetree-only platform.

The platform data support in this driver was only used for non-DT
platforms.

Remove the platform data support as it has no more users.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20210118121549.1625217-1-festevam@gmail.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/imx-sdma.c

@@ -1961,7 +1961,6 @@ static int sdma_probe(struct platform_device *pdev)
 	int irq;
 	struct resource *iores;
 	struct resource spba_res;
-	struct sdma_platform_data *pdata = dev_get_platdata(&pdev->dev);
 	int i;
 	struct sdma_engine *sdma;
 	s32 *saddr_arr;
@@ -2063,8 +2062,6 @@ static int sdma_probe(struct platform_device *pdev)
 
 	if (sdma->drvdata->script_addrs)
 		sdma_add_scripts(sdma, sdma->drvdata->script_addrs);
-	if (pdata && pdata->script_addrs)
-		sdma_add_scripts(sdma, pdata->script_addrs);
 
 	sdma->dma_device.dev = &pdev->dev;
 
@@ -2110,30 +2107,18 @@ static int sdma_probe(struct platform_device *pdev)
 	}
 
 	/*
-	 * Kick off firmware loading as the very last step:
-	 * attempt to load firmware only if we're not on the error path, because
-	 * the firmware callback requires a fully functional and allocated sdma
-	 * instance.
+	 * Because that device tree does not encode ROM script address,
+	 * the RAM script in firmware is mandatory for device tree
+	 * probe, otherwise it fails.
 	 */
-	if (pdata) {
-		ret = sdma_get_firmware(sdma, pdata->fw_name);
-		if (ret)
-			dev_warn(&pdev->dev, "failed to get firmware from platform data\n");
+	ret = of_property_read_string(np, "fsl,sdma-ram-script-name",
+				      &fw_name);
+	if (ret) {
+		dev_warn(&pdev->dev, "failed to get firmware name\n");
 	} else {
-		/*
-		 * Because that device tree does not encode ROM script address,
-		 * the RAM script in firmware is mandatory for device tree
-		 * probe, otherwise it fails.
-		 */
-		ret = of_property_read_string(np, "fsl,sdma-ram-script-name",
-					      &fw_name);
-		if (ret) {
-			dev_warn(&pdev->dev, "failed to get firmware name\n");
-		} else {
-			ret = sdma_get_firmware(sdma, fw_name);
-			if (ret)
-				dev_warn(&pdev->dev, "failed to get firmware from device tree\n");
-		}
+		ret = sdma_get_firmware(sdma, fw_name);
+		if (ret)
+			dev_warn(&pdev->dev, "failed to get firmware from device tree\n");
 	}
 
 	return 0;

include/linux/platform_data/dma-imx-sdma.h

@@ -57,15 +57,4 @@ struct sdma_script_start_addrs {
 	/* End of v4 array */
 };
 
-/**
- * struct sdma_platform_data - platform specific data for SDMA engine
- *
- * @fw_name		The firmware name
- * @script_addrs	SDMA scripts addresses in SDMA ROM
- */
-struct sdma_platform_data {
-	char *fw_name;
-	struct sdma_script_start_addrs *script_addrs;
-};
-
 #endif /* __MACH_MXC_SDMA_H__ */