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Subject[PATCH] regulator: da9211: add cache_type
Date
Add regmap_cache to reduce wakeups events of interrupt if regulator is
accessed frequently. This results in saving more power.

Suggested-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
---
drivers/regulator/da9211-regulator.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/drivers/regulator/da9211-regulator.c b/drivers/regulator/da9211-regulator.c
index 297b3aa7c753..cffcefd0538d 100644
--- a/drivers/regulator/da9211-regulator.c
+++ b/drivers/regulator/da9211-regulator.c
@@ -51,10 +51,24 @@ static const struct regmap_range_cfg da9211_regmap_range[] = {
},
};

+static bool da9211_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case DA9211_REG_STATUS_A:
+ case DA9211_REG_STATUS_B:
+ case DA9211_REG_EVENT_A:
+ case DA9211_REG_EVENT_B:
+ return true;
+ }
+ return false;
+}
+
static const struct regmap_config da9211_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 5 * 128,
+ .volatile_reg = da9211_volatile_reg,
+ .cache_type = REGCACHE_RBTREE,
.ranges = da9211_regmap_range,
.num_ranges = ARRAY_SIZE(da9211_regmap_range),
};
--
2.28.0.236.gb10cc79966-goog
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