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regmap: spmi: support base and extended register spaces

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SPMI states that a slave may contain two register spaces, the Base
register space is a 5-bit byte-addressable space accessed via the
Register Read/Write and Register Zero Write command sequences, and the
Extended register space: a 16-bit byte-addressable space accessed via
the Extended Read/Write and Extended Read/Write Long command sequences.

Provide support for accessing both of these spaces, taking advantage of
the more bandwidth-efficient commands ('Register 0 Write' vs 'Register
Write', and 'Extended Register Read/Write' vs 'Extended Register
Read/Write Long') when possible.

Signed-off-by: Josh Cartwright <joshc@codeaurora.org>
Acked-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Josh Cartwright 2014-02-12 13:44:27 -06:00 • committed by Greg Kroah-Hartman
parent 2c9e577d97
commit c9afbb05a9
2 changed files with 208 additions and 38 deletions
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12
include/linux/regmap.h
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@ -321,8 +321,10 @@ struct regmap *regmap_init_i2c(struct i2c_client *i2c,
const struct regmap_config *config);
struct regmap *regmap_init_spi(struct spi_device *dev,
const struct regmap_config *config);
struct regmap *regmap_init_spmi(struct spmi_device *dev,
const struct regmap_config *config);
struct regmap *regmap_init_spmi_base(struct spmi_device *dev,
const struct regmap_config *config);
struct regmap *regmap_init_spmi_ext(struct spmi_device *dev,
const struct regmap_config *config);
struct regmap *regmap_init_mmio_clk(struct device *dev, const char *clk_id,
void __iomem *regs,
const struct regmap_config *config);
@ -335,8 +337,10 @@ struct regmap *devm_regmap_init_i2c(struct i2c_client *i2c,
const struct regmap_config *config);
struct regmap *devm_regmap_init_spi(struct spi_device *dev,
const struct regmap_config *config);
struct regmap *devm_regmap_init_spmi(struct spmi_device *dev,
const struct regmap_config *config);
struct regmap *devm_regmap_init_spmi_base(struct spmi_device *dev,
const struct regmap_config *config);
struct regmap *devm_regmap_init_spmi_ext(struct spmi_device *dev,
const struct regmap_config *config);
struct regmap *devm_regmap_init_mmio_clk(struct device *dev, const char *clk_id,
void __iomem *regs,
const struct regmap_config *config);