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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>
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1 changed files with 37 additions and 1 deletions
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@ -77,11 +77,47 @@ static const struct linear_range mp8859_dcdc_ranges[] = {
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REGULATOR_LINEAR_RANGE(0, VOL_MIN_IDX, VOL_MAX_IDX, 10000),
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REGULATOR_LINEAR_RANGE(0, VOL_MIN_IDX, VOL_MAX_IDX, 10000),
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};
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};
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static bool mp8859_readable(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case MP8859_VOUT_L_REG:
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case MP8859_VOUT_H_REG:
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case MP8859_VOUT_GO_REG:
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case MP8859_IOUT_LIM_REG:
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case MP8859_CTL1_REG:
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case MP8859_CTL2_REG:
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case MP8859_STATUS_REG:
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case MP8859_INTERRUPT_REG:
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case MP8859_MASK_REG:
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case MP8859_ID1_REG:
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case MP8859_MFR_ID_REG:
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case MP8859_DEV_ID_REG:
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case MP8859_IC_REV_REG:
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return true;
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default:
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return false;
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}
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}
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static bool mp8859_volatile(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case MP8859_VOUT_GO_REG:
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case MP8859_STATUS_REG:
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case MP8859_INTERRUPT_REG:
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return true;
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default:
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return false;
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}
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}
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static const struct regmap_config mp8859_regmap = {
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static const struct regmap_config mp8859_regmap = {
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.reg_bits = 8,
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.reg_bits = 8,
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.val_bits = 8,
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.val_bits = 8,
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.max_register = MP8859_MAX_REG,
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.max_register = MP8859_MAX_REG,
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.cache_type = REGCACHE_RBTREE,
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.cache_type = REGCACHE_MAPLE,
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.readable_reg = mp8859_readable,
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.volatile_reg = mp8859_volatile,
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};
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};
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static const struct regulator_ops mp8859_ops = {
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static const struct regulator_ops mp8859_ops = {
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