Enable regmap cache to reduce i2c transactions and corresponding
interrupts if regulator is accessed frequently. Since the register map
is small, we use a FLAT regmap cache.
Signed-off-by: Jisheng Zhang <[email protected]>
---
drivers/regulator/rt5739.c | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/drivers/regulator/rt5739.c b/drivers/regulator/rt5739.c
index 91412c905ce6..47172b11301c 100644
--- a/drivers/regulator/rt5739.c
+++ b/drivers/regulator/rt5739.c
@@ -24,8 +24,11 @@
#define RT5739_REG_NSEL1 0x01
#define RT5739_REG_CNTL1 0x02
#define RT5739_REG_ID1 0x03
+#define RT5739_REG_ID2 0x04
+#define RT5739_REG_MON 0x05
#define RT5739_REG_CNTL2 0x06
#define RT5739_REG_CNTL4 0x08
+#define RT5739_MAX_REGS (RT5739_REG_CNTL4 + 1)
#define RT5739_VSEL_MASK GENMASK(7, 0)
#define RT5739_MODEVSEL1_MASK BIT(1)
@@ -236,11 +239,46 @@ static void rt5739_init_regulator_desc(struct regulator_desc *desc,
}
}
+static bool rt5739_writeable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case RT5739_REG_NSEL0 ... RT5739_REG_CNTL1:
+ case RT5739_REG_CNTL2:
+ case RT5739_REG_CNTL4:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool rt5739_readable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case RT5739_REG_NSEL0 ... RT5739_REG_CNTL2:
+ case RT5739_REG_CNTL4:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool rt5739_volatile_reg(struct device *dev, unsigned int reg)
+{
+ if (reg == RT5739_REG_MON)
+ return true;
+ return false;
+}
+
static const struct regmap_config rt5739_regmap_config = {
.name = "rt5739",
.reg_bits = 8,
.val_bits = 8,
.max_register = RT5739_REG_CNTL4,
+ .num_reg_defaults_raw = RT5739_MAX_REGS,
+ .cache_type = REGCACHE_FLAT,
+ .writeable_reg = rt5739_writeable_reg,
+ .readable_reg = rt5739_readable_reg,
+ .volatile_reg = rt5739_volatile_reg,
};
static int rt5739_probe(struct i2c_client *i2c)
--
2.43.0