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regulator: sy8827n: Enable REGCACHE_FLAT

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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 <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/20210803165211.3b00db29@xhacker.debian
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jisheng Zhang 2021-08-03 16:52:11 +08:00 committed by Mark Brown
parent 784ed36958
commit 6bdd1c672a
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GPG Key ID: 24D68B725D5487D0
1 changed files with 14 additions and 0 deletions
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14
drivers/regulator/sy8827n.c
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@ -19,6 +19,10 @@
#define SY8827N_MODE (1 << 6) #define SY8827N_MODE (1 << 6)
#define SY8827N_VSEL1 1 #define SY8827N_VSEL1 1
#define SY8827N_CTRL 2 #define SY8827N_CTRL 2
#define SY8827N_ID1 3
#define SY8827N_ID2 4
#define SY8827N_PGOOD 5
#define SY8827N_MAX (SY8827N_PGOOD + 1)
#define SY8827N_NVOLTAGES 64 #define SY8827N_NVOLTAGES 64
#define SY8827N_VSELMIN 600000 #define SY8827N_VSELMIN 600000
@ -102,9 +106,19 @@ static int sy8827n_regulator_register(struct sy8827n_device_info *di,
return PTR_ERR_OR_ZERO(rdev); return PTR_ERR_OR_ZERO(rdev);
} }
static bool sy8827n_volatile_reg(struct device *dev, unsigned int reg)
{
if (reg == SY8827N_PGOOD)
return true;
return false;
}
static const struct regmap_config sy8827n_regmap_config = { static const struct regmap_config sy8827n_regmap_config = {
.reg_bits = 8, .reg_bits = 8,
.val_bits = 8, .val_bits = 8,
.volatile_reg = sy8827n_volatile_reg,
.num_reg_defaults_raw = SY8827N_MAX,
.cache_type = REGCACHE_FLAT,
}; };
static int sy8827n_i2c_probe(struct i2c_client *client) static int sy8827n_i2c_probe(struct i2c_client *client)