89 static int sram_add_pool(struct sram_dev *sram, struct sram_reserve *block,  in sram_add_pool()  argument
94 	part->pool = devm_gen_pool_create(sram->dev, ilog2(SRAM_GRANULARITY),  in sram_add_pool()
102 		dev_err(sram->dev, "failed to register subpool: %d\n", ret);  in sram_add_pool()
109 static int sram_add_export(struct sram_dev *sram, struct sram_reserve *block,  in sram_add_export()  argument
113 	part->battr.attr.name = devm_kasprintf(sram->dev, GFP_KERNEL,  in sram_add_export()
124 	return device_create_bin_file(sram->dev, &part->battr);  in sram_add_export()
127 static int sram_add_partition(struct sram_dev *sram, struct sram_reserve *block,  in sram_add_partition()  argument
131 	struct sram_partition *part = &sram->partition[sram->partitions];  in sram_add_partition()
134 	part->base = sram->virt_base + block->start;  in sram_add_partition()
137 		ret = sram_add_pool(sram, block, start, part);  in sram_add_partition()
142 		ret = sram_add_export(sram, block, start, part);  in sram_add_partition()
146 	sram->partitions++;  in sram_add_partition()
151 static void sram_free_partitions(struct sram_dev *sram)  in sram_free_partitions()  argument
155 	if (!sram->partitions)  in sram_free_partitions()
158 	part = &sram->partition[sram->partitions - 1];  in sram_free_partitions()
159 	for (; sram->partitions; sram->partitions--, part--) {  in sram_free_partitions()
161 			device_remove_bin_file(sram->dev, &part->battr);  in sram_free_partitions()
165 			dev_err(sram->dev, "removed pool while SRAM allocated\n");  in sram_free_partitions()
178 static int sram_reserve_regions(struct sram_dev *sram, struct resource *res)  in sram_reserve_regions()  argument
180 	struct device_node *np = sram->dev->of_node, *child;  in sram_reserve_regions()
207 			dev_err(sram->dev,  in sram_reserve_regions()
214 			dev_err(sram->dev,  in sram_reserve_regions()
237 				dev_err(sram->dev,  in sram_reserve_regions()
245 			block->label = devm_kstrdup(sram->dev,  in sram_reserve_regions()
250 			dev_dbg(sram->dev, "found %sblock '%s' 0x%x-0x%x\n",  in sram_reserve_regions()
254 			dev_dbg(sram->dev, "found reserved block 0x%x-0x%x\n",  in sram_reserve_regions()
270 		sram->partition = devm_kzalloc(sram->dev,  in sram_reserve_regions()
271 				       exports * sizeof(*sram->partition),  in sram_reserve_regions()
273 		if (!sram->partition) {  in sram_reserve_regions()
283 			dev_err(sram->dev,  in sram_reserve_regions()
287 			sram_free_partitions(sram);  in sram_reserve_regions()
292 			ret = sram_add_partition(sram, block,  in sram_reserve_regions()
295 				sram_free_partitions(sram);  in sram_reserve_regions()
313 		dev_dbg(sram->dev, "adding chunk 0x%lx-0x%lx\n",  in sram_reserve_regions()
316 		ret = gen_pool_add_virt(sram->pool,  in sram_reserve_regions()
317 				(unsigned long)sram->virt_base + cur_start,  in sram_reserve_regions()
320 			sram_free_partitions(sram);  in sram_reserve_regions()
339 	struct sram_dev *sram;  in sram_probe()  local
344 	sram = devm_kzalloc(&pdev->dev, sizeof(*sram), GFP_KERNEL);  in sram_probe()
345 	if (!sram)  in sram_probe()
348 	sram->dev = &pdev->dev;  in sram_probe()
352 		dev_err(sram->dev, "found no memory resource\n");  in sram_probe()
358 	if (!devm_request_mem_region(sram->dev, res->start, size, pdev->name)) {  in sram_probe()
359 		dev_err(sram->dev, "could not request region for resource\n");  in sram_probe()
363 	sram->virt_base = devm_ioremap_wc(sram->dev, res->start, size);  in sram_probe()
364 	if (IS_ERR(sram->virt_base))  in sram_probe()
365 		return PTR_ERR(sram->virt_base);  in sram_probe()
367 	sram->pool = devm_gen_pool_create(sram->dev, ilog2(SRAM_GRANULARITY),  in sram_probe()
369 	if (IS_ERR(sram->pool))  in sram_probe()
370 		return PTR_ERR(sram->pool);  in sram_probe()
372 	ret = sram_reserve_regions(sram, res);  in sram_probe()
376 	sram->clk = devm_clk_get(sram->dev, NULL);  in sram_probe()
377 	if (IS_ERR(sram->clk))  in sram_probe()
378 		sram->clk = NULL;  in sram_probe()
380 		clk_prepare_enable(sram->clk);  in sram_probe()
382 	platform_set_drvdata(pdev, sram);  in sram_probe()
384 	dev_dbg(sram->dev, "SRAM pool: %zu KiB @ 0x%p\n",  in sram_probe()
385 		gen_pool_size(sram->pool) / 1024, sram->virt_base);  in sram_probe()
392 	struct sram_dev *sram = platform_get_drvdata(pdev);  in sram_remove()  local
394 	sram_free_partitions(sram);  in sram_remove()
396 	if (gen_pool_avail(sram->pool) < gen_pool_size(sram->pool))  in sram_remove()
397 		dev_err(sram->dev, "removed while SRAM allocated\n");  in sram_remove()
399 	if (sram->clk)  in sram_remove()
400 		clk_disable_unprepare(sram->clk);  in sram_remove()