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
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Changes in v2: - Fix comment for devm_regmap_init() - Fix spelling in commit log
drivers/core/regmap.c | 26 ++++++++++++++++++++++++++ include/regmap.h | 18 ++++++++++++++++++ 2 files changed, 44 insertions(+)
diff --git a/drivers/core/regmap.c b/drivers/core/regmap.c index e9e55c9d16..f69ff6d12f 100644 --- a/drivers/core/regmap.c +++ b/drivers/core/regmap.c @@ -219,6 +219,32 @@ int regmap_init_mem(ofnode node, struct regmap **mapp)
return 0; } + +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 9ada1af5ef..624cdd8c98 100644 --- a/include/regmap.h +++ b/include/regmap.h @@ -73,6 +73,9 @@ struct regmap_range { ulong size; };
+struct regmap_bus; +struct regmap_config; + /** * struct regmap - a way of accessing hardware/bus registers * @@ -333,6 +336,21 @@ int regmap_init_mem_platdata(struct udevice *dev, fdt_val_t *reg, int count,
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 *