linux-kernel - [PATCH] regulator: tps6287x-regulator: Enable REGCACHE

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Message-ID: <20250629095822.868-1-jszhang@kernel.org>
Date: Sun, 29 Jun 2025 17:58:22 +0800
From: Jisheng Zhang <jszhang@...nel.org>
To: Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH] regulator: tps6287x-regulator: Enable REGCACHE_MAPLE

Enable regmap cache to reduce i2c transactions and corresponding
interrupts if regulator is accessed frequently.

Signed-off-by: Jisheng Zhang <jszhang@...nel.org>
---
 drivers/regulator/tps6287x-regulator.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/regulator/tps6287x-regulator.c b/drivers/regulator/tps6287x-regulator.c
index c0f5f0a186a3..7b7d3ae39206 100644
--- a/drivers/regulator/tps6287x-regulator.c
+++ b/drivers/regulator/tps6287x-regulator.c
@@ -27,10 +27,17 @@
 #define TPS6287X_CTRL3		0x03
 #define TPS6287X_STATUS		0x04
 
+static bool tps6287x_volatile_reg(struct device *dev, unsigned int reg)
+{
+	return reg == TPS6287X_STATUS;
+}
+
 static const struct regmap_config tps6287x_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
 	.max_register = TPS6287X_STATUS,
+	.cache_type = REGCACHE_MAPLE,
+	.volatile_reg = tps6287x_volatile_reg,
 };
 
 static const struct linear_range tps6287x_voltage_ranges[] = {
-- 
2.49.0