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The regmap API usually assumes that bulk read operations will read a range of registers but some I2C/SPI devices have certain registers for which a such a read operation will return data from an internal FIFO instead. Add an explicit API to support bulk read without range semantics. Some linux drivers use regmap_bulk_read or regmap_raw_read for such registers, for example mpu6050 or bmi150 from IIO. This only happens to work because when caching is disabled a single regmap read op will map to a single bus read op (as desired). This breaks if caching is enabled and reg+1 happens to be a cacheable register. Without regmap support refactoring a driver to enable regmap caching requires separate I2C and SPI paths. This is exactly what regmap is supposed to help avoid. Suggested-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Crestez Dan Leonard <leonard.crestez@intel.com> Signed-off-by: Stefan Popa <stefan.popa@analog.com> Signed-off-by: Mark Brown <broonie@kernel.org> |
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| .. | ||
| internal.h | ||
| Kconfig | ||
| Makefile | ||
| regcache-flat.c | ||
| regcache-lzo.c | ||
| regcache-rbtree.c | ||
| regcache.c | ||
| regmap-ac97.c | ||
| regmap-debugfs.c | ||
| regmap-i2c.c | ||
| regmap-irq.c | ||
| regmap-mmio.c | ||
| regmap-sdw.c | ||
| regmap-slimbus.c | ||
| regmap-spi.c | ||
| regmap-spmi.c | ||
| regmap-w1.c | ||
| regmap.c | ||
| trace.h | ||