linux-kernel - [PATCH] regulator: tps6286x-regulator: Enable REGCACHE

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Message-ID: <20250629095107.804-1-jszhang@kernel.org>
Date: Sun, 29 Jun 2025 17:51:07 +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: tps6286x-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/tps6286x-regulator.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/regulator/tps6286x-regulator.c b/drivers/regulator/tps6286x-regulator.c
index 75f441f36de7..778f169b0acc 100644
--- a/drivers/regulator/tps6286x-regulator.c
+++ b/drivers/regulator/tps6286x-regulator.c
@@ -19,13 +19,22 @@
 #define TPS6286X_CONTROL_FPWM	BIT(4)
 #define TPS6286X_CONTROL_SWEN	BIT(5)
 
+#define TPS6286X_STATUS		0x05
+
 #define TPS6286X_MIN_MV		400
 #define TPS6286X_MAX_MV		1675
 #define TPS6286X_STEP_MV	5
 
+static bool tps6287x_volatile_reg(struct device *dev, unsigned int reg)
+{
+	return reg == TPS6286X_STATUS;
+}
+
 static const struct regmap_config tps6286x_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
+	.cache_type = REGCACHE_MAPLE,
+	.volatile_reg = tps6287x_volatile_reg,
 };
 
 static int tps6286x_set_mode(struct regulator_dev *rdev, unsigned int mode)
-- 
2.49.0