regmap: Add devm_regmap_init()
Most of new linux drivers are using managed-API to allocate resources. To
ease porting drivers from linux to U-Boot, introduce devm_regmap_init() as
a managed API to get a regmap from the device tree.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
diff --git a/drivers/core/regmap.c b/drivers/core/regmap.c
index a67a237..7422536 100644
--- a/drivers/core/regmap.c
+++ b/drivers/core/regmap.c
@@ -14,7 +14,10 @@
#include <regmap.h>
#include <asm/io.h>
#include <dm/of_addr.h>
+#include <dm/devres.h>
#include <linux/ioport.h>
+#include <linux/compat.h>
+#include <linux/err.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -228,6 +231,32 @@
return ret;
}
+
+static void devm_regmap_release(struct udevice *dev, void *res)
+{
+ regmap_uninit(*(struct regmap **)res);
+}
+
+struct regmap *devm_regmap_init(struct udevice *dev,
+ const struct regmap_bus *bus,
+ void *bus_context,
+ const struct regmap_config *config)
+{
+ int rc;
+ struct regmap **mapp;
+
+ mapp = devres_alloc(devm_regmap_release, sizeof(struct regmap *),
+ __GFP_ZERO);
+ if (unlikely(!mapp))
+ return ERR_PTR(-ENOMEM);
+
+ rc = regmap_init_mem(dev_ofnode(dev), mapp);
+ if (rc)
+ return ERR_PTR(rc);
+
+ devres_add(dev, mapp);
+ return *mapp;
+}
#endif
void *regmap_get_range(struct regmap *map, unsigned int range_num)
diff --git a/include/regmap.h b/include/regmap.h
index 30183c5..c7dd240 100644
--- a/include/regmap.h
+++ b/include/regmap.h
@@ -75,6 +75,9 @@
ulong size;
};
+struct regmap_bus;
+struct regmap_config;
+
/**
* struct regmap - a way of accessing hardware/bus registers
*
@@ -336,6 +339,21 @@
int regmap_init_mem_index(ofnode node, struct regmap **mapp, int index);
/**
+ * devm_regmap_init() - Initialise register map (device managed)
+ *
+ * @dev: Device that will be interacted with
+ * @bus: Bus-specific callbacks to use with device (IGNORED)
+ * @bus_context: Data passed to bus-specific callbacks (IGNORED)
+ * @config: Configuration for register map (IGNORED)
+ *
+ * @Return a valid pointer to a struct regmap or a ERR_PTR() on error.
+ * The structure is automatically freed when the device is unbound
+ */
+struct regmap *devm_regmap_init(struct udevice *dev,
+ const struct regmap_bus *bus,
+ void *bus_context,
+ const struct regmap_config *config);
+/**
* regmap_get_range() - Obtain the base memory address of a regmap range
*
* @map: Regmap to query