linux-kernel - [PATCH 1/3] dt-bindings: regulator: Add MAX77675 binding header

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Message-Id: <20250926053757.480086-2-joan.na@analog.com>
Date: Fri, 26 Sep 2025 14:37:55 +0900
From: Joan-Na-adi <joan.na.devcode@...il.com>
To: Liam Girdwood <lgirdwood@...il.com>
Cc: Mark Brown <broonie@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	Joan Na <joan.na@...log.com>
Subject: [PATCH 1/3] dt-bindings: regulator: Add MAX77675 binding header

From: Joan Na <joan.na@...log.com>

Add binding header for the MAX77675 PMIC regulator. This header defines
voltage ID and regulator index macros used both in device tree sources
and in the driver implementation.

Signed-off-by: Joan Na <joan.na@...log.com>
---
 .../regulator/maxim,max77675-regulator.h      | 78 +++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 include/dt-bindings/regulator/maxim,max77675-regulator.h

diff --git a/include/dt-bindings/regulator/maxim,max77675-regulator.h b/include/dt-bindings/regulator/maxim,max77675-regulator.h
new file mode 100644
index 000000000000..df12cae5e250
--- /dev/null
+++ b/include/dt-bindings/regulator/maxim,max77675-regulator.h
@@ -0,0 +1,78 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR BSD 2-Clause */
+/*
+ * This header provides macros for MAXIM MAX77675 device bindings.
+ *
+ * Copyright (c) 2025, Analog Device inc.
+ * Author: Joan Na <joan.na@...log.com>
+ */
+
+#ifndef _DT_BINDINGS_REGULATOR_MAX77675_
+#define _DT_BINDINGS_REGULATOR_MAX77675_
+
+// Define the voltage limits for 12.5mV and 25mV steps
+#define MAX77675_MIN_UV            500000    // 500 mV
+
+#define MAX77675_MAX_UV_25MV       5500000   // 5.5V in microvolts for 25mV step
+#define MAX77675_MAX_UV_12_5MV     3687500   // 3.6875V in microvolts for 12.5mV step
+
+#define MAX77675_STEP_25MV         25000     // 25 mV
+#define MAX77675_STEP_12_5MV       12500     // 12.5 mV
+
+#define MAX77675_NUM_LEVELS_25MV   201
+#define MAX77675_NUM_LEVELS_12_5MV 255
+
+/* FPS source */
+#define MAX77675_FPS_SLOT_0       0
+#define MAX77675_FPS_SLOT_1       1
+#define MAX77675_FPS_SLOT_2       2
+#define MAX77675_FPS_SLOT_3       3
+#define MAX77675_FPS_NONE         4
+#define MAX77675_FPS_DEF          5
+
+/* nEN Manual Reset Time Configuration (MRT) */
+#define MAX77675_MRT_4S           0x0
+#define MAX77675_MRT_8S           0x1
+#define MAX77675_MRT_12S          0x2
+#define MAX77675_MRT_16S          0x3
+
+/* Internal Pull-Up Disable (PU_DIS) */
+#define MAX77675_PU_EN            0x0
+#define MAX77675_PU_DIS           0x1
+
+/* Bias Low-Power Mode (BIAS_LPM) */
+#define MAX77675_BIAS_NORMAL      0x0
+#define MAX77675_BIAS_LPM_REQ     0x1
+
+/* SIMO Internal Channel Disable (SIMO_INT_CH_DIS) */
+#define MAX77675_SIMO_INT_NORMAL  0x0
+#define MAX77675_SIMO_INT_LDO     0x1
+
+/* nEN Mode Configuration */
+#define MAX77675_EN_PUSH_BUTTON   0x0
+#define MAX77675_EN_SLIDE_SWITCH  0x1
+#define MAX77675_EN_LOGIC         0x2
+#define MAX77675_EN_RESERVED      0x3
+
+/* Debounce Timer Enable (DBEN_nEN) */
+#define MAX77675_DBEN_100US       0x0
+#define MAX77675_DBEN_30MS        0x1
+
+/* Rising slew rate control for SBB0 when ramping up */
+#define MAX77675_SR_2MV_PER_US    0x0  // 2 mV/us
+#define MAX77675_SR_USE_DVS       0x1  // Use DVS slew rate setting (maxim,dvs-slew-rate)
+
+/* Dynamic Voltage Scaling (DVS) Slew Rate */
+#define MAX77675_DVS_SLEW_5MV     0x0  // 5 mV/us
+#define MAX77675_DVS_SLEW_10MV    0x1  // 10 mV/us
+
+/* Latency Mode */
+#define MAX77675_LAT_MODE_HIGH_LATENCY    0  // Low quiescent current, high latency (~100us)
+#define MAX77675_LAT_MODE_LOW_LATENCY     1   // High quiescent current, low latency (~10us)
+
+/* SIMO Buck-Boost Drive Strength (All Channels) */
+#define MAX77675_DRV_SBB_FASTEST      0  // Fastest transition (~0.6 ns)
+#define MAX77675_DRV_SBB_FAST         1  // Faster transition (~1.2 ns)
+#define MAX77675_DRV_SBB_MEDIUM       2  // Moderate transition (~1.8 ns)
+#define MAX77675_DRV_SBB_SLOWEST      3  // Slowest transition (~8 ns)
+
+#endif
--
2.34.1