From: Jisheng Zhang <jszhang@kernel.org>
To: Liam Girdwood <lgirdwood@gmail.com>, Mark Brown <broonie@kernel.org>
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] regulator: tps6287x: Enable REGCACHE_FLAT
Date: Tue, 30 Apr 2024 09:01:08 +0800 [thread overview]
Message-ID: <20240430010108.2004-1-jszhang@kernel.org> (raw)
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 <jszhang@kernel.org>
---
drivers/regulator/tps6287x-regulator.c | 33 ++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/drivers/regulator/tps6287x-regulator.c b/drivers/regulator/tps6287x-regulator.c
index 9b7c3d77789e..d4dffb87e858 100644
--- a/drivers/regulator/tps6287x-regulator.c
+++ b/drivers/regulator/tps6287x-regulator.c
@@ -26,11 +26,44 @@
#define TPS6287X_CTRL2_VRANGE GENMASK(3, 2)
#define TPS6287X_CTRL3 0x03
#define TPS6287X_STATUS 0x04
+#define TPS6287X_MAX_REGS (TPS6287X_STATUS + 1)
+
+static bool tps6287x_writeable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case TPS6287X_VSET ... TPS6287X_CTRL3:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool tps6287x_readable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case TPS6287X_VSET ... TPS6287X_STATUS:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool tps6287x_volatile_reg(struct device *dev, unsigned int reg)
+{
+ if (reg == TPS6287X_STATUS)
+ return true;
+ return false;
+}
static const struct regmap_config tps6287x_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = TPS6287X_STATUS,
+ .num_reg_defaults_raw = TPS6287X_MAX_REGS,
+ .cache_type = REGCACHE_FLAT,
+ .writeable_reg = tps6287x_writeable_reg,
+ .readable_reg = tps6287x_readable_reg,
+ .volatile_reg = tps6287x_volatile_reg,
};
static const struct linear_range tps6287x_voltage_ranges[] = {
--
2.43.0
reply other threads:[~2024-04-30 1:14 UTC|newest]
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