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regulator: mp8859: Specify register accessibility and enable caching 

Avoid needless accesses to the hardware by caching register values that
we know, marking status registers as volatile as appropriate.

Tested-by: Markus Reichl <m.reichl@fivetechno.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://msgid.link/r/20240225-regulator-mp8859-v1-1-68ee2c839ded@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Mark Brown 2024-02-25 14:59:27 +00:00
parent b9262cc1b9
commit b65e9149bd
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 37 additions and 1 deletions
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38
drivers/regulator/mp8859.c
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@ -77,11 +77,47 @@ static const struct linear_range mp8859_dcdc_ranges[] = {
REGULATOR_LINEAR_RANGE(0, VOL_MIN_IDX, VOL_MAX_IDX, 10000),
};
static bool mp8859_readable(struct device *dev, unsigned int reg)
{
switch (reg) {
case MP8859_VOUT_L_REG:
case MP8859_VOUT_H_REG:
case MP8859_VOUT_GO_REG:
case MP8859_IOUT_LIM_REG:
case MP8859_CTL1_REG:
case MP8859_CTL2_REG:
case MP8859_STATUS_REG:
case MP8859_INTERRUPT_REG:
case MP8859_MASK_REG:
case MP8859_ID1_REG:
case MP8859_MFR_ID_REG:
case MP8859_DEV_ID_REG:
case MP8859_IC_REV_REG:
return true;
default:
return false;
}
}
static bool mp8859_volatile(struct device *dev, unsigned int reg)
{
switch (reg) {
case MP8859_VOUT_GO_REG:
case MP8859_STATUS_REG:
case MP8859_INTERRUPT_REG:
return true;
default:
return false;
}
}
static const struct regmap_config mp8859_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MP8859_MAX_REG,
.cache_type = REGCACHE_RBTREE,
.cache_type = REGCACHE_MAPLE,
.readable_reg = mp8859_readable,
.volatile_reg = mp8859_volatile,
};
static const struct regulator_ops mp8859_ops = {