regmap: spmi: support base and extended register spaces

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>

1 files changed, 8 insertions, 4 deletions

diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 4149f1a9b003..8cc73ac6f888 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -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);