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/sy8827n.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
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)
--
2.32.0
On Tue, 3 Aug 2021 16:52:11 +0800, Jisheng Zhang wrote:
> 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.
Applied to
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git for-next
Thanks!
[1/1] regulator: sy8827n: Enable REGCACHE_FLAT
commit: 6bdd1c672a2afbcd1a6d50dc2351ef4ea0bbfc61
All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.
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Thanks,
Mark