Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx> --- drivers/base/regmap/Kconfig | 6 +- drivers/base/regmap/Makefile | 1 + drivers/base/regmap/regmap-rsb.c | 121 +++++++++++++++++++++++++++++++++++++++ include/linux/regmap.h | 36 ++++++++++++ 4 files changed, 163 insertions(+), 1 deletion(-) create mode 100644 drivers/base/regmap/regmap-rsb.c diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig index db9d00c36a3e..afb41994c51e 100644 --- a/drivers/base/regmap/Kconfig +++ b/drivers/base/regmap/Kconfig @@ -3,7 +3,7 @@ # subsystems should select the appropriate symbols. config REGMAP - default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ) + default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_RSB || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ) select LZO_COMPRESS select LZO_DECOMPRESS select IRQ_DOMAIN if REGMAP_IRQ @@ -24,6 +24,10 @@ config REGMAP_SPMI tristate depends on SPMI +config REGMAP_RSB + tristate + depends on RSB + config REGMAP_MMIO tristate diff --git a/drivers/base/regmap/Makefile b/drivers/base/regmap/Makefile index 609e4c84f485..dad32b3903d4 100644 --- a/drivers/base/regmap/Makefile +++ b/drivers/base/regmap/Makefile @@ -8,5 +8,6 @@ obj-$(CONFIG_REGMAP_AC97) += regmap-ac97.o obj-$(CONFIG_REGMAP_I2C) += regmap-i2c.o obj-$(CONFIG_REGMAP_SPI) += regmap-spi.o obj-$(CONFIG_REGMAP_SPMI) += regmap-spmi.o +obj-$(CONFIG_REGMAP_RSB) += regmap-rsb.o obj-$(CONFIG_REGMAP_MMIO) += regmap-mmio.o obj-$(CONFIG_REGMAP_IRQ) += regmap-irq.o diff --git a/drivers/base/regmap/regmap-rsb.c b/drivers/base/regmap/regmap-rsb.c new file mode 100644 index 000000000000..e82aa980abe1 --- /dev/null +++ b/drivers/base/regmap/regmap-rsb.c @@ -0,0 +1,121 @@ +/* + * Register map access API - RSB support + * + * Copyright 2015 Chen-Yu Tsai + * + * Chen-Yu Tsai <wens@xxxxxxxx> + * + * Based on regmap-i2c.c + * + * Copyright 2011 Wolfson Microelectronics plc + * + * Author: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/regmap.h> +#include <linux/rsb.h> +#include <linux/module.h> +#include <linux/slab.h> + +#include "internal.h" + +struct rsb_context { + struct rsb_device *rsb; + int size; +}; + +static int regmap_rsb_reg_read(void *context, unsigned int reg, + unsigned int *val) +{ + struct rsb_context *ctx = context; + struct rsb_device *rsb = ctx->rsb; + + if (reg > 0xff) + return -EINVAL; + + return rsb_register_read(rsb, reg, val, ctx->size); +} + +static int regmap_rsb_reg_write(void *context, unsigned int reg, + unsigned int val) +{ + struct rsb_context *ctx = context; + struct rsb_device *rsb = ctx->rsb; + + return rsb_register_write(rsb, reg, val, ctx->size); +} + +static void regmap_rsb_free_context(void *context) +{ + struct rsb_context *ctx = context; + + kfree(ctx); +} + +static struct regmap_bus regmap_rsb = { + .reg_write = regmap_rsb_reg_write, + .reg_read = regmap_rsb_reg_read, + .free_context = regmap_rsb_free_context, + .reg_format_endian_default = REGMAP_ENDIAN_NATIVE, + .val_format_endian_default = REGMAP_ENDIAN_NATIVE, +}; + +static struct rsb_context *regmap_rsb_init_context(struct rsb_device *rsb, + const struct regmap_config *config) +{ + struct rsb_context *ctx; + + switch (config->val_bits) { + case 8: + case 16: + case 32: + break; + default: + return ERR_PTR(-EINVAL); + } + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return ERR_PTR(-ENOMEM); + + ctx->rsb = rsb; + ctx->size = config->val_bits / 8; + + return ctx; +} + +struct regmap *__regmap_init_rsb(struct rsb_device *rsb, + const struct regmap_config *config, + struct lock_class_key *lock_key, + const char *lock_name) +{ + struct rsb_context *ctx = regmap_rsb_init_context(rsb, config); + + if (IS_ERR(ctx)) + return ERR_CAST(ctx); + + return __regmap_init(&rsb->dev, ®map_rsb, ctx, config, + lock_key, lock_name); +} +EXPORT_SYMBOL_GPL(__regmap_init_rsb); + +struct regmap *__devm_regmap_init_rsb(struct rsb_device *rsb, + const struct regmap_config *config, + struct lock_class_key *lock_key, + const char *lock_name) +{ + struct rsb_context *ctx = regmap_rsb_init_context(rsb, config); + + if (IS_ERR(ctx)) + return ERR_CAST(ctx); + + return __devm_regmap_init(&rsb->dev, ®map_rsb, ctx, config, + lock_key, lock_name); +} +EXPORT_SYMBOL_GPL(__devm_regmap_init_rsb); + +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/regmap.h b/include/linux/regmap.h index 17178317bcec..df94574b1d37 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -25,6 +25,7 @@ struct i2c_client; struct irq_domain; struct spi_device; struct spmi_device; +struct rsb_device; struct regmap; struct regmap_range_cfg; struct regmap_field; @@ -377,6 +378,10 @@ struct regmap *__regmap_init_ac97(struct snd_ac97 *ac97, const struct regmap_config *config, struct lock_class_key *lock_key, const char *lock_name); +struct regmap *__regmap_init_rsb(struct rsb_device *rsb, + const struct regmap_config *config, + struct lock_class_key *lock_key, + const char *lock_name); struct regmap *__devm_regmap_init(struct device *dev, const struct regmap_bus *bus, @@ -410,6 +415,10 @@ struct regmap *__devm_regmap_init_ac97(struct snd_ac97 *ac97, const struct regmap_config *config, struct lock_class_key *lock_key, const char *lock_name); +struct regmap *__devm_regmap_init_rsb(struct rsb_device *rsb, + const struct regmap_config *config, + struct lock_class_key *lock_key, + const char *lock_name); /* * Wrapper for regmap_init macros to include a unique lockdep key and name @@ -544,6 +553,19 @@ int regmap_attach_dev(struct device *dev, struct regmap *map, bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg); /** + * regmap_init_rsb(): Initialise register map + * + * @rsb: Device that will be interacted with + * @config: Configuration for register map + * + * The return value will be an ERR_PTR() on error or a valid pointer to + * a struct regmap. + */ +#define regmap_init_rsb(rsb, config) \ + __regmap_lockdep_wrapper(__regmap_init_rsb, #config, \ + rsb, config) + +/** * devm_regmap_init(): Initialise managed register map * * @dev: Device that will be interacted with @@ -658,6 +680,20 @@ bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg); __regmap_lockdep_wrapper(__devm_regmap_init_ac97, #config, \ ac97, config) +/** + * devm_regmap_init_rsb(): Initialise managed register map + * + * @rsb: Device that will be interacted with + * @config: Configuration for register map + * + * The return value will be an ERR_PTR() on error or a valid pointer + * to a struct regmap. The regmap will be automatically freed by the + * device management code. + */ +#define devm_regmap_init_rsb(rsb, config) \ + __regmap_lockdep_wrapper(__devm_regmap_init_rsb, #config, \ + rsb, config) + void regmap_exit(struct regmap *map); int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config); -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html