Merge tag 'rproc-v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux

Pull remoteproc updates from Bjorn Andersson:

 - Correct error path in rproc_alloc(), with regards to put_device() and
   freeing of the rproc index ida

 - The Mediatek SCP remoteproc driver is returned to only creating child
   devices from specific DeviceTree nodes

 - Update the OMAP remoteproc driver to match the cleanups in the OMAP
   iommu driver

In addition to this, a number of conversions to devres and other small,
mostly stylistic, code cleanups

* tag 'rproc-v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux:
  remoteproc: st: Use syscon_regmap_lookup_by_phandle_args
  remoteproc: keystone: Use syscon_regmap_lookup_by_phandle_args
  remoteproc: st: Simplify with dev_err_probe
  remoteproc: omap: Simplify returning syscon PTR_ERR
  remoteproc: keystone: Simplify returning syscon PTR_ERR
  remoteproc: k3-r5: Add devm action to release tsp
  remoteproc: k3-r5: Use devm_rproc_add() helper
  remoteproc: k3-r5: Use devm_ioremap_wc() helper
  remoteproc: k3-r5: Use devm_kcalloc() helper
  remoteproc: k3-r5: Add devm action to release reserved memory
  remoteproc: mtk_scp: Only populate devices for SCP cores
  remoteproc: omap: Handle ARM dma_iommu_mapping
  remoteproc: core: Fix ida_free call while not allocated

Author: torvalds

drivers/remoteproc/keystone_remoteproc.c

@@ -335,25 +335,16 @@ static int keystone_rproc_of_get_dev_syscon(struct platform_device *pdev,
 {
 	struct device_node *np = pdev->dev.of_node;
 	struct device *dev = &pdev->dev;
-	int ret;
 
 	if (!of_property_read_bool(np, "ti,syscon-dev")) {
 		dev_err(dev, "ti,syscon-dev property is absent\n");
 		return -EINVAL;
 	}
 
-	ksproc->dev_ctrl =
-		syscon_regmap_lookup_by_phandle(np, "ti,syscon-dev");
-	if (IS_ERR(ksproc->dev_ctrl)) {
-		ret = PTR_ERR(ksproc->dev_ctrl);
-		return ret;
-	}
-
-	if (of_property_read_u32_index(np, "ti,syscon-dev", 1,
-				       &ksproc->boot_offset)) {
-		dev_err(dev, "couldn't read the boot register offset\n");
-		return -EINVAL;
-	}
+	ksproc->dev_ctrl = syscon_regmap_lookup_by_phandle_args(np, "ti,syscon-dev",
+								1, &ksproc->boot_offset);
+	if (IS_ERR(ksproc->dev_ctrl))
+		return PTR_ERR(ksproc->dev_ctrl);
 
 	return 0;
 }

drivers/remoteproc/mtk_scp.c

@@ -1326,6 +1326,11 @@ static int scp_cluster_init(struct platform_device *pdev, struct mtk_scp_of_clus
 	return ret;
 }
 
+static const struct of_device_id scp_core_match[] = {
+	{ .compatible = "mediatek,scp-core" },
+	{}
+};
+
 static int scp_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -1357,13 +1362,15 @@ static int scp_probe(struct platform_device *pdev)
 	INIT_LIST_HEAD(&scp_cluster->mtk_scp_list);
 	mutex_init(&scp_cluster->cluster_lock);
 
-	ret = devm_of_platform_populate(dev);
+	ret = of_platform_populate(dev_of_node(dev), scp_core_match, NULL, dev);
 	if (ret)
 		return dev_err_probe(dev, ret, "Failed to populate platform devices\n");
 
 	ret = scp_cluster_init(pdev, scp_cluster);
-	if (ret)
+	if (ret) {
+		of_platform_depopulate(dev);
 		return ret;
+	}
 
 	return 0;
 }
@@ -1379,6 +1386,7 @@ static void scp_remove(struct platform_device *pdev)
 		rproc_del(scp->rproc);
 		scp_free(scp);
 	}
+	of_platform_depopulate(&pdev->dev);
 	mutex_destroy(&scp_cluster->cluster_lock);
 }
 

drivers/remoteproc/omap_remoteproc.c

@@ -37,6 +37,10 @@
 
 #include <linux/platform_data/dmtimer-omap.h>
 
+#ifdef CONFIG_ARM_DMA_USE_IOMMU
+#include <asm/dma-iommu.h>
+#endif
+
 #include "omap_remoteproc.h"
 #include "remoteproc_internal.h"
 
@@ -1133,7 +1137,6 @@ static int omap_rproc_get_boot_data(struct platform_device *pdev,
 	struct device_node *np = pdev->dev.of_node;
 	struct omap_rproc *oproc = rproc->priv;
 	const struct omap_rproc_dev_data *data;
-	int ret;
 
 	data = of_device_get_match_data(&pdev->dev);
 	if (!data)
@@ -1149,10 +1152,8 @@ static int omap_rproc_get_boot_data(struct platform_device *pdev,
 
 	oproc->boot_data->syscon =
 			syscon_regmap_lookup_by_phandle(np, "ti,bootreg");
-	if (IS_ERR(oproc->boot_data->syscon)) {
-		ret = PTR_ERR(oproc->boot_data->syscon);
-		return ret;
-	}
+	if (IS_ERR(oproc->boot_data->syscon))
+		return PTR_ERR(oproc->boot_data->syscon);
 
 	if (of_property_read_u32_index(np, "ti,bootreg", 1,
 				       &oproc->boot_data->boot_reg)) {
@@ -1323,6 +1324,19 @@ static int omap_rproc_probe(struct platform_device *pdev)
 	/* All existing OMAP IPU and DSP processors have an MMU */
 	rproc->has_iommu = true;
 
+#ifdef CONFIG_ARM_DMA_USE_IOMMU
+	/*
+	 * Throw away the ARM DMA mapping that we'll never use, so it doesn't
+	 * interfere with the core rproc->domain and we get the right DMA ops.
+	 */
+	if (pdev->dev.archdata.mapping) {
+		struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(&pdev->dev);
+
+		arm_iommu_detach_device(&pdev->dev);
+		arm_iommu_release_mapping(mapping);
+	}
+#endif
+
 	ret = omap_rproc_of_get_internal_memories(pdev, rproc);
 	if (ret)
 		return ret;

drivers/remoteproc/remoteproc_core.c

@@ -2486,6 +2486,13 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
 	rproc->dev.driver_data = rproc;
 	idr_init(&rproc->notifyids);
 
+	/* Assign a unique device index and name */
+	rproc->index = ida_alloc(&rproc_dev_index, GFP_KERNEL);
+	if (rproc->index < 0) {
+		dev_err(dev, "ida_alloc failed: %d\n", rproc->index);
+		goto put_device;
+	}
+
 	rproc->name = kstrdup_const(name, GFP_KERNEL);
 	if (!rproc->name)
 		goto put_device;
@@ -2496,13 +2503,6 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
 	if (rproc_alloc_ops(rproc, ops))
 		goto put_device;
 
-	/* Assign a unique device index and name */
-	rproc->index = ida_alloc(&rproc_dev_index, GFP_KERNEL);
-	if (rproc->index < 0) {
-		dev_err(dev, "ida_alloc failed: %d\n", rproc->index);
-		goto put_device;
-	}
-
 	dev_set_name(&rproc->dev, "remoteproc%d", rproc->index);
 
 	atomic_set(&rproc->power, 0);

drivers/remoteproc/st_remoteproc.c

@@ -290,45 +290,35 @@ static int st_rproc_parse_dt(struct platform_device *pdev)
 	if (ddata->config->sw_reset) {
 		ddata->sw_reset = devm_reset_control_get_exclusive(dev,
 								   "sw_reset");
-		if (IS_ERR(ddata->sw_reset)) {
-			dev_err(dev, "Failed to get S/W Reset\n");
-			return PTR_ERR(ddata->sw_reset);
-		}
+		if (IS_ERR(ddata->sw_reset))
+			return dev_err_probe(dev, PTR_ERR(ddata->sw_reset),
+					     "Failed to get S/W Reset\n");
 	}
 
 	if (ddata->config->pwr_reset) {
 		ddata->pwr_reset = devm_reset_control_get_exclusive(dev,
 								    "pwr_reset");
-		if (IS_ERR(ddata->pwr_reset)) {
-			dev_err(dev, "Failed to get Power Reset\n");
-			return PTR_ERR(ddata->pwr_reset);
-		}
+		if (IS_ERR(ddata->pwr_reset))
+			return dev_err_probe(dev, PTR_ERR(ddata->pwr_reset),
+					     "Failed to get Power Reset\n");
 	}
 
 	ddata->clk = devm_clk_get(dev, NULL);
-	if (IS_ERR(ddata->clk)) {
-		dev_err(dev, "Failed to get clock\n");
-		return PTR_ERR(ddata->clk);
-	}
+	if (IS_ERR(ddata->clk))
+		return dev_err_probe(dev, PTR_ERR(ddata->clk),
+				     "Failed to get clock\n");
 
 	err = of_property_read_u32(np, "clock-frequency", &ddata->clk_rate);
 	if (err) {
 		dev_err(dev, "failed to get clock frequency\n");
 		return err;
 	}
 
-	ddata->boot_base = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
-	if (IS_ERR(ddata->boot_base)) {
-		dev_err(dev, "Boot base not found\n");
-		return PTR_ERR(ddata->boot_base);
-	}
-
-	err = of_property_read_u32_index(np, "st,syscfg", 1,
-					 &ddata->boot_offset);
-	if (err) {
-		dev_err(dev, "Boot offset not found\n");
-		return -EINVAL;
-	}
+	ddata->boot_base = syscon_regmap_lookup_by_phandle_args(np, "st,syscfg",
+								1, &ddata->boot_offset);
+	if (IS_ERR(ddata->boot_base))
+		return dev_err_probe(dev, PTR_ERR(ddata->boot_base),
+				     "Boot base not found\n");
 
 	err = clk_prepare(ddata->clk);
 	if (err)
@@ -395,32 +385,32 @@ static int st_rproc_probe(struct platform_device *pdev)
 		 */
 		chan = mbox_request_channel_byname(&ddata->mbox_client_vq0, "vq0_rx");
 		if (IS_ERR(chan)) {
-			dev_err(&rproc->dev, "failed to request mbox chan 0\n");
-			ret = PTR_ERR(chan);
+			ret = dev_err_probe(&rproc->dev, PTR_ERR(chan),
+					    "failed to request mbox chan 0\n");
 			goto free_clk;
 		}
 		ddata->mbox_chan[ST_RPROC_VQ0 * MBOX_MAX + MBOX_RX] = chan;
 
 		chan = mbox_request_channel_byname(&ddata->mbox_client_vq0, "vq0_tx");
 		if (IS_ERR(chan)) {
-			dev_err(&rproc->dev, "failed to request mbox chan 0\n");
-			ret = PTR_ERR(chan);
+			ret = dev_err_probe(&rproc->dev, PTR_ERR(chan),
+					    "failed to request mbox chan 0\n");
 			goto free_mbox;
 		}
 		ddata->mbox_chan[ST_RPROC_VQ0 * MBOX_MAX + MBOX_TX] = chan;
 
 		chan = mbox_request_channel_byname(&ddata->mbox_client_vq1, "vq1_rx");
 		if (IS_ERR(chan)) {
-			dev_err(&rproc->dev, "failed to request mbox chan 1\n");
-			ret = PTR_ERR(chan);
+			ret = dev_err_probe(&rproc->dev, PTR_ERR(chan),
+					    "failed to request mbox chan 1\n");
 			goto free_mbox;
 		}
 		ddata->mbox_chan[ST_RPROC_VQ1 * MBOX_MAX + MBOX_RX] = chan;
 
 		chan = mbox_request_channel_byname(&ddata->mbox_client_vq1, "vq1_tx");
 		if (IS_ERR(chan)) {
-			dev_err(&rproc->dev, "failed to request mbox chan 1\n");
-			ret = PTR_ERR(chan);
+			ret = dev_err_probe(&rproc->dev, PTR_ERR(chan),
+					    "failed to request mbox chan 1\n");
 			goto free_mbox;
 		}
 		ddata->mbox_chan[ST_RPROC_VQ1 * MBOX_MAX + MBOX_TX] = chan;