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2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 
 kernel/drivers/misc/sram.c
....@@ -1,21 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  * Generic on-chip SRAM allocation driver
34  *
45  * Copyright (C) 2012 Philipp Zabel, Pengutronix
5
- *
6
- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License
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- * as published by the Free Software Foundation; either version 2
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- * of the License, or (at your option) any later version.
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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- * MA 02110-1301, USA.
196  */
207 
218 #include <linux/clk.h>
....@@ -323,10 +310,8 @@
323310 		cur_start = block->start + block->size;
324311 	}
325312 
326
- err_chunks:
327
-	if (child)
328
-		of_node_put(child);
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-
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+err_chunks:
314
+	of_node_put(child);
330315 	kfree(rblocks);
331316 
332317 	return ret;
....@@ -355,8 +340,6 @@
355340 static int sram_probe(struct platform_device *pdev)
356341 {
357342 	struct sram_dev *sram;
358
-	struct resource *res;
359
-	size_t size;
360343 	int ret;
361344 	int (*init_func)(void);
362345 
....@@ -366,25 +349,14 @@
366349 
367350 	sram->dev = &pdev->dev;
368351 
369
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
370
-	if (!res) {
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-		dev_err(sram->dev, "found no memory resource\n");
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-		return -EINVAL;
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-	}
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-
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-	size = resource_size(res);
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-
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-	if (!devm_request_mem_region(sram->dev, res->start, size, pdev->name)) {
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-		dev_err(sram->dev, "could not request region for resource\n");
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-		return -EBUSY;
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-	}
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-
382352 	if (of_property_read_bool(pdev->dev.of_node, "no-memory-wc"))
383
-		sram->virt_base = devm_ioremap(sram->dev, res->start, size);
353
+		sram->virt_base = devm_platform_ioremap_resource(pdev, 0);
384354 	else
385
-		sram->virt_base = devm_ioremap_wc(sram->dev, res->start, size);
386
-	if (!sram->virt_base)
387
-		return -ENOMEM;
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+		sram->virt_base = devm_platform_ioremap_resource_wc(pdev, 0);
356
+	if (IS_ERR(sram->virt_base)) {
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+		dev_err(&pdev->dev, "could not map SRAM registers\n");
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+		return PTR_ERR(sram->virt_base);
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+	}
388360 
389361 	sram->pool = devm_gen_pool_create(sram->dev, ilog2(SRAM_GRANULARITY),
390362 					  NUMA_NO_NODE, NULL);
....@@ -397,7 +369,8 @@
397369 	else
398370 		clk_prepare_enable(sram->clk);
399371 
400
-	ret = sram_reserve_regions(sram, res);
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+	ret = sram_reserve_regions(sram,
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+			platform_get_resource(pdev, IORESOURCE_MEM, 0));
401374 	if (ret)
402375 		goto err_disable_clk;
403376