From patchwork Wed May 27 12:52:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pratyush Yadav X-Patchwork-Id: 246684 List-Id: U-Boot discussion From: p.yadav at ti.com (Pratyush Yadav) Date: Wed, 27 May 2020 18:22:01 +0530 Subject: [PATCH 1/8] regmap: Add devm_regmap_init() In-Reply-To: <20200527125208.24881-1-p.yadav@ti.com> References: <20200527125208.24881-1-p.yadav@ti.com> Message-ID: <20200527125208.24881-2-p.yadav@ti.com> From: Jean-Jacques Hiblot 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 Reviewed-by: Simon Glass Signed-off-by: Pratyush Yadav --- drivers/core/regmap.c | 29 +++++++++++++++++++++++++++++ include/regmap.h | 18 ++++++++++++++++++ 2 files changed, 47 insertions(+) diff --git a/drivers/core/regmap.c b/drivers/core/regmap.c index a67a237b88..74225361fd 100644 --- a/drivers/core/regmap.c +++ b/drivers/core/regmap.c @@ -14,7 +14,10 @@ #include #include #include +#include #include +#include +#include DECLARE_GLOBAL_DATA_PTR; @@ -228,6 +231,32 @@ err: 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 30183c5e71..c7dd240a74 100644 --- a/include/regmap.h +++ b/include/regmap.h @@ -75,6 +75,9 @@ struct regmap_range { ulong size; }; +struct regmap_bus; +struct regmap_config; + /** * struct regmap - a way of accessing hardware/bus registers * @@ -335,6 +338,21 @@ 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 *