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| author | Jisheng Zhang <Jisheng.Zhang@synaptics.com> | 2021-08-03 11:52:11 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-08-03 20:27:19 +0300 |
| commit | 6bdd1c672a2afbcd1a6d50dc2351ef4ea0bbfc61 (patch) | |
| tree | cb7d6276d8755fd89c7713f98b31ff0a349c0f00 /drivers/regulator | |
| parent | 784ed36958390c511cd48db061401f9ba20ba67a (diff) | |
| download | linux-6bdd1c672a2afbcd1a6d50dc2351ef4ea0bbfc61.tar.xz | |
regulator: sy8827n: Enable REGCACHE_FLAT
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>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/sy8827n.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/regulator/sy8827n.c b/drivers/regulator/sy8827n.c index 52e8c17afe24..7d5d9f879ce3 100644 --- a/drivers/regulator/sy8827n.c +++ b/drivers/regulator/sy8827n.c @@ -19,6 +19,10 @@ #define SY8827N_MODE (1 << 6) #define SY8827N_VSEL1 1 #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_VSELMIN 600000 @@ -102,9 +106,19 @@ static int sy8827n_regulator_register(struct sy8827n_device_info *di, 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 = { .reg_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) |