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authorMark Brown <broonie@kernel.org>2020-09-28 22:50:47 +0300
committerMark Brown <broonie@kernel.org>2020-09-28 22:50:47 +0300
commitd05199af72cbb97b6a293b632ffdd09c4757d5fe (patch)
tree944d77d383be4f7ecd7b3664b58e4f0b30f5133b /drivers/base/regmap/regmap.c
parent2defc3fa18a68963a330187f5386968e50832d06 (diff)
parentea470b82f205fc1b0b5276575da519bb7d86db25 (diff)
downloadlinux-d05199af72cbb97b6a293b632ffdd09c4757d5fe.tar.xz
Merge tag 'regmap-field-bulk-api' into regmap-5.10
regmap: Add a bulk field API Useful for devices with many fields.
Diffstat (limited to 'drivers/base/regmap/regmap.c')
-rw-r--r--drivers/base/regmap/regmap.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 5a121bee530c..b65e8338243f 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1254,6 +1254,106 @@ struct regmap_field *devm_regmap_field_alloc(struct device *dev,
}
EXPORT_SYMBOL_GPL(devm_regmap_field_alloc);
+
+/**
+ * regmap_field_bulk_alloc() - Allocate and initialise a bulk register field.
+ *
+ * @regmap: regmap bank in which this register field is located.
+ * @rm_field: regmap register fields within the bank.
+ * @reg_field: Register fields within the bank.
+ * @num_fields: Number of register fields.
+ *
+ * The return value will be an -ENOMEM on error or zero for success.
+ * Newly allocated regmap_fields should be freed by calling
+ * regmap_field_bulk_free()
+ */
+int regmap_field_bulk_alloc(struct regmap *regmap,
+ struct regmap_field **rm_field,
+ struct reg_field *reg_field,
+ int num_fields)
+{
+ struct regmap_field *rf;
+ int i;
+
+ rf = kcalloc(num_fields, sizeof(*rf), GFP_KERNEL);
+ if (!rf)
+ return -ENOMEM;
+
+ for (i = 0; i < num_fields; i++) {
+ regmap_field_init(&rf[i], regmap, reg_field[i]);
+ rm_field[i] = &rf[i];
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(regmap_field_bulk_alloc);
+
+/**
+ * devm_regmap_field_bulk_alloc() - Allocate and initialise a bulk register
+ * fields.
+ *
+ * @dev: Device that will be interacted with
+ * @regmap: regmap bank in which this register field is located.
+ * @rm_field: regmap register fields within the bank.
+ * @reg_field: Register fields within the bank.
+ * @num_fields: Number of register fields.
+ *
+ * The return value will be an -ENOMEM on error or zero for success.
+ * Newly allocated regmap_fields will be automatically freed by the
+ * device management code.
+ */
+int devm_regmap_field_bulk_alloc(struct device *dev,
+ struct regmap *regmap,
+ struct regmap_field **rm_field,
+ struct reg_field *reg_field,
+ int num_fields)
+{
+ struct regmap_field *rf;
+ int i;
+
+ rf = devm_kcalloc(dev, num_fields, sizeof(*rf), GFP_KERNEL);
+ if (!rf)
+ return -ENOMEM;
+
+ for (i = 0; i < num_fields; i++) {
+ regmap_field_init(&rf[i], regmap, reg_field[i]);
+ rm_field[i] = &rf[i];
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devm_regmap_field_bulk_alloc);
+
+/**
+ * regmap_field_bulk_free() - Free register field allocated using
+ * regmap_field_bulk_alloc.
+ *
+ * @field: regmap fields which should be freed.
+ */
+void regmap_field_bulk_free(struct regmap_field *field)
+{
+ kfree(field);
+}
+EXPORT_SYMBOL_GPL(regmap_field_bulk_free);
+
+/**
+ * devm_regmap_field_bulk_free() - Free a bulk register field allocated using
+ * devm_regmap_field_bulk_alloc.
+ *
+ * @dev: Device that will be interacted with
+ * @field: regmap field which should be freed.
+ *
+ * Free register field allocated using devm_regmap_field_bulk_alloc(). Usually
+ * drivers need not call this function, as the memory allocated via devm
+ * will be freed as per device-driver life-cycle.
+ */
+void devm_regmap_field_bulk_free(struct device *dev,
+ struct regmap_field *field)
+{
+ devm_kfree(dev, field);
+}
+EXPORT_SYMBOL_GPL(devm_regmap_field_bulk_free);
+
/**
* devm_regmap_field_free() - Free a register field allocated using
* devm_regmap_field_alloc.