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path: root/drivers/spi/spi-mem.c
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Diffstat (limited to 'drivers/spi/spi-mem.c')
-rw-r--r--drivers/spi/spi-mem.c72
1 files changed, 71 insertions, 1 deletions
diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c
index 5217a5628be2..a4d8d19ecff9 100644
--- a/drivers/spi/spi-mem.c
+++ b/drivers/spi/spi-mem.c
@@ -537,7 +537,6 @@ EXPORT_SYMBOL_GPL(spi_mem_dirmap_create);
/**
* spi_mem_dirmap_destroy() - Destroy a direct mapping descriptor
* @desc: the direct mapping descriptor to destroy
- * @info: direct mapping information
*
* This function destroys a direct mapping descriptor previously created by
* spi_mem_dirmap_create().
@@ -548,9 +547,80 @@ void spi_mem_dirmap_destroy(struct spi_mem_dirmap_desc *desc)
if (!desc->nodirmap && ctlr->mem_ops && ctlr->mem_ops->dirmap_destroy)
ctlr->mem_ops->dirmap_destroy(desc);
+
+ kfree(desc);
}
EXPORT_SYMBOL_GPL(spi_mem_dirmap_destroy);
+static void devm_spi_mem_dirmap_release(struct device *dev, void *res)
+{
+ struct spi_mem_dirmap_desc *desc = *(struct spi_mem_dirmap_desc **)res;
+
+ spi_mem_dirmap_destroy(desc);
+}
+
+/**
+ * devm_spi_mem_dirmap_create() - Create a direct mapping descriptor and attach
+ * it to a device
+ * @dev: device the dirmap desc will be attached to
+ * @mem: SPI mem device this direct mapping should be created for
+ * @info: direct mapping information
+ *
+ * devm_ variant of the spi_mem_dirmap_create() function. See
+ * spi_mem_dirmap_create() for more details.
+ *
+ * Return: a valid pointer in case of success, and ERR_PTR() otherwise.
+ */
+struct spi_mem_dirmap_desc *
+devm_spi_mem_dirmap_create(struct device *dev, struct spi_mem *mem,
+ const struct spi_mem_dirmap_info *info)
+{
+ struct spi_mem_dirmap_desc **ptr, *desc;
+
+ ptr = devres_alloc(devm_spi_mem_dirmap_release, sizeof(*ptr),
+ GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ desc = spi_mem_dirmap_create(mem, info);
+ if (IS_ERR(desc)) {
+ devres_free(ptr);
+ } else {
+ *ptr = desc;
+ devres_add(dev, ptr);
+ }
+
+ return desc;
+}
+EXPORT_SYMBOL_GPL(devm_spi_mem_dirmap_create);
+
+static int devm_spi_mem_dirmap_match(struct device *dev, void *res, void *data)
+{
+ struct spi_mem_dirmap_desc **ptr = res;
+
+ if (WARN_ON(!ptr || !*ptr))
+ return 0;
+
+ return *ptr == data;
+}
+
+/**
+ * devm_spi_mem_dirmap_destroy() - Destroy a direct mapping descriptor attached
+ * to a device
+ * @dev: device the dirmap desc is attached to
+ * @desc: the direct mapping descriptor to destroy
+ *
+ * devm_ variant of the spi_mem_dirmap_destroy() function. See
+ * spi_mem_dirmap_destroy() for more details.
+ */
+void devm_spi_mem_dirmap_destroy(struct device *dev,
+ struct spi_mem_dirmap_desc *desc)
+{
+ devres_release(dev, devm_spi_mem_dirmap_release,
+ devm_spi_mem_dirmap_match, desc);
+}
+EXPORT_SYMBOL_GPL(devm_spi_mem_dirmap_destroy);
+
/**
* spi_mem_dirmap_dirmap_read() - Read data through a direct mapping
* @desc: direct mapping descriptor