From 6bdd1c672a2afbcd1a6d50dc2351ef4ea0bbfc61 Mon Sep 17 00:00:00 2001
From: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Date: Tue, 3 Aug 2021 16:52:11 +0800
Subject: [PATCH] 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>
---
drivers/regulator/sy8827n.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/regulator/sy8827n.c b/drivers/regulator/sy8827n.c
index 52e8c17afe243..7d5d9f879ce3c 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)