forked from Minki/linux
mfd: twl-core: API to set the regcache bypass for a given regmap in twl
If the regcache is enabled on the regmap module drivers might need to access to HW register(s) in certain cases in cache bypass mode. As an example of this is the audio block's ANAMICL register. In normal operation the content can be cached but during initialization one bit from the register need to be monitored. With the twl_set_regcache_bypass() the client driver can switch regcache bypass on and off when it is needed so we can utilize the regcache for more registers. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Acked-by: Mark Brown <broonie@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
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@ -383,6 +383,27 @@ int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
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}
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}
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EXPORT_SYMBOL(twl_i2c_read);
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EXPORT_SYMBOL(twl_i2c_read);
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/**
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* twl_regcache_bypass - Configure the regcache bypass for the regmap associated
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* with the module
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* @mod_no: module number
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* @enable: Regcache bypass state
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*
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* Returns 0 else failure.
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*/
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int twl_set_regcache_bypass(u8 mod_no, bool enable)
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{
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struct regmap *regmap = twl_get_regmap(mod_no);
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if (!regmap)
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return -EPERM;
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regcache_cache_bypass(regmap, enable);
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return 0;
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}
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EXPORT_SYMBOL(twl_set_regcache_bypass);
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/*----------------------------------------------------------------------*/
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/*----------------------------------------------------------------------*/
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/**
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/**
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@ -175,6 +175,9 @@ static inline int twl_class_is_ ##class(void) \
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TWL_CLASS_IS(4030, TWL4030_CLASS_ID)
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TWL_CLASS_IS(4030, TWL4030_CLASS_ID)
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TWL_CLASS_IS(6030, TWL6030_CLASS_ID)
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TWL_CLASS_IS(6030, TWL6030_CLASS_ID)
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/* Set the regcache bypass for the regmap associated with the nodule */
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int twl_set_regcache_bypass(u8 mod_no, bool enable);
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/*
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/*
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* Read and write several 8-bit registers at once.
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* Read and write several 8-bit registers at once.
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*/
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*/
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