Applied "mfd: rn5t618: Add Ricoh RN5T567 PMIC support" to the regulator tree

Mark Brown broonie at
Wed Jun 29 11:05:27 PDT 2016

The patch

   mfd: rn5t618: Add Ricoh RN5T567 PMIC support

has been applied to the regulator tree at


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tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
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>From a99ab50dbbb1f982d076d19e0a9959fe2efa3126 Mon Sep 17 00:00:00 2001
From: Stefan Agner <stefan at>
Date: Tue, 28 Jun 2016 22:53:19 -0700
Subject: [PATCH] mfd: rn5t618: Add Ricoh RN5T567 PMIC support

The Ricoh RN5T567 is from the same family as the Ricoh RN5T618 is,
the differences are:

+ Slightly different output voltage/currents
+ 32kHz Output
- ADC/Charger capabilities

Signed-off-by: Stefan Agner <stefan at>
Reviewed-by: Marcel Ziswiler <marcel.ziswiler at>
Acked-by: Rob Herring <robh at>
Signed-off-by: Lee Jones <lee.jones at>
 Documentation/devicetree/bindings/mfd/rn5t618.txt | 19 +++++++++--------
 drivers/mfd/Kconfig                               |  7 ++++---
 drivers/mfd/rn5t618.c                             | 25 ++++++++++++++++-------
 include/linux/mfd/rn5t618.h                       | 12 +++++++++++
 4 files changed, 45 insertions(+), 18 deletions(-)

diff --git a/Documentation/devicetree/bindings/mfd/rn5t618.txt b/Documentation/devicetree/bindings/mfd/rn5t618.txt
index 937785a3eddc..9e6770b105c9 100644
--- a/Documentation/devicetree/bindings/mfd/rn5t618.txt
+++ b/Documentation/devicetree/bindings/mfd/rn5t618.txt
@@ -1,18 +1,21 @@
-* Ricoh RN5T618 PMIC
+* Ricoh RN5T567/RN5T618 PMIC
-Ricoh RN5T618 is a power management IC which integrates 3 step-down
-DCDC converters, 7 low-dropout regulators, a Li-ion battery charger,
-fuel gauge, ADC, GPIOs and a watchdog timer. It can be controlled
-through a I2C interface.
+Ricoh RN5T567/RN5T618 is a power management IC family which integrates
+3 to 4 step-down DCDC converters, 7 low-dropout regulators, GPIOs and
+a watchdog timer. The RN5T618 provides additionally a Li-ion battery
+charger, fuel gauge and an ADC. It can be controlled through an I2C
 Required properties:
- - compatible: should be "ricoh,rn5t618"
+ - compatible: must be one of
+		"ricoh,rn5t567"
+		"ricoh,rn5t618"
  - reg: the I2C slave address of the device
  - regulators: the node is required if the regulator functionality is
-   needed. The valid regulator names are: DCDC1, DCDC2, DCDC3, LDO1,
-   LDO2, LDO3, LDO4, LDO5, LDORTC1 and LDORTC2.
+   needed. The valid regulator names are: DCDC1, DCDC2, DCDC3, DCDC4
+   (RN5T567), LDO1, LDO2, LDO3, LDO4, LDO5, LDORTC1 and LDORTC2.
    The common bindings for each individual regulator can be found in:
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 1bcf601de5bc..ff031a7735a5 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -852,13 +852,14 @@ config MFD_RK808
 	  including interrupts, RTC, LDO & DCDC regulators, and onkey.
 config MFD_RN5T618
-	tristate "Ricoh RN5T5618 PMIC"
+	tristate "Ricoh RN5T567/618 PMIC"
 	depends on I2C
+	depends on OF
 	select MFD_CORE
 	select REGMAP_I2C
-	  Say yes here to add support for the Ricoh RN5T618 PMIC. This
-	  driver provides common support for accessing the device,
+	  Say yes here to add support for the Ricoh RN5T567 or R5T618 PMIC.
+	  This driver provides common support for accessing the device,
 	  additional drivers must be enabled in order to use the
 	  functionality of the device.
diff --git a/drivers/mfd/rn5t618.c b/drivers/mfd/rn5t618.c
index 0ad51d792feb..c86160d3a773 100644
--- a/drivers/mfd/rn5t618.c
+++ b/drivers/mfd/rn5t618.c
@@ -2,6 +2,7 @@
  * MFD core driver for Ricoh RN5T618 PMIC
  * Copyright (C) 2014 Beniamino Galvani <b.galvani at>
+ * Copyright (C) 2016 Toradex AG
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -15,6 +16,7 @@
 #include <linux/mfd/core.h>
 #include <linux/mfd/rn5t618.h>
 #include <linux/module.h>
+#include <linux/of_device.h>
 #include <linux/regmap.h>
 static const struct mfd_cell rn5t618_cells[] = {
@@ -59,17 +61,32 @@ static void rn5t618_power_off(void)
+static const struct of_device_id rn5t618_of_match[] = {
+	{ .compatible = "ricoh,rn5t567", .data = (void *)RN5T567 },
+	{ .compatible = "ricoh,rn5t618", .data = (void *)RN5T618 },
+	{ }
+MODULE_DEVICE_TABLE(of, rn5t618_of_match);
 static int rn5t618_i2c_probe(struct i2c_client *i2c,
 			     const struct i2c_device_id *id)
+	const struct of_device_id *of_id;
 	struct rn5t618 *priv;
 	int ret;
+	of_id = of_match_device(rn5t618_of_match, &i2c->dev);
+	if (!of_id) {
+		dev_err(&i2c->dev, "Failed to find matching DT ID\n");
+		return -EINVAL;
+	}
 	priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 	i2c_set_clientdata(i2c, priv);
+	priv->variant = (long)of_id->data;
 	priv->regmap = devm_regmap_init_i2c(i2c, &rn5t618_regmap_config);
 	if (IS_ERR(priv->regmap)) {
@@ -105,12 +122,6 @@ static int rn5t618_i2c_remove(struct i2c_client *i2c)
 	return 0;
-static const struct of_device_id rn5t618_of_match[] = {
-	{ .compatible = "ricoh,rn5t618" },
-	{ }
-MODULE_DEVICE_TABLE(of, rn5t618_of_match);
 static const struct i2c_device_id rn5t618_i2c_id[] = {
 	{ }
@@ -129,5 +140,5 @@ static struct i2c_driver rn5t618_i2c_driver = {
 MODULE_AUTHOR("Beniamino Galvani <b.galvani at>");
-MODULE_DESCRIPTION("Ricoh RN5T618 MFD driver");
+MODULE_DESCRIPTION("Ricoh RN5T567/618 MFD driver");
diff --git a/include/linux/mfd/rn5t618.h b/include/linux/mfd/rn5t618.h
index c72d5344f3b3..54179c2577ae 100644
--- a/include/linux/mfd/rn5t618.h
+++ b/include/linux/mfd/rn5t618.h
@@ -20,6 +20,7 @@
 #define RN5T618_OTPVER			0x01
 #define RN5T618_IODAC			0x02
 #define RN5T618_VINDAC			0x03
+#define RN5T618_OUT32KEN		0x05
 #define RN5T618_CPUCNT			0x06
 #define RN5T618_PSWR			0x07
 #define RN5T618_PONHIS			0x09
@@ -38,6 +39,7 @@
 #define RN5T618_DC1_SLOT		0x16
 #define RN5T618_DC2_SLOT		0x17
 #define RN5T618_DC3_SLOT		0x18
+#define RN5T618_DC4_SLOT		0x19
 #define RN5T618_LDO1_SLOT		0x1b
 #define RN5T618_LDO2_SLOT		0x1c
 #define RN5T618_LDO3_SLOT		0x1d
@@ -54,12 +56,16 @@
 #define RN5T618_DC2CTL2			0x2f
 #define RN5T618_DC3CTL			0x30
 #define RN5T618_DC3CTL2			0x31
+#define RN5T618_DC4CTL			0x32
+#define RN5T618_DC4CTL2			0x33
 #define RN5T618_DC1DAC			0x36
 #define RN5T618_DC2DAC			0x37
 #define RN5T618_DC3DAC			0x38
+#define RN5T618_DC4DAC			0x39
 #define RN5T618_DC1DAC_SLP		0x3b
 #define RN5T618_DC2DAC_SLP		0x3c
 #define RN5T618_DC3DAC_SLP		0x3d
+#define RN5T618_DC4DAC_SLP		0x3e
 #define RN5T618_DCIREN			0x40
 #define RN5T618_DCIRQ			0x41
 #define RN5T618_DCIRMON			0x42
@@ -221,8 +227,14 @@ enum {
+enum {
+	RN5T567 = 0,
+	RN5T618,
 struct rn5t618 {
 	struct regmap *regmap;
+	long variant;
 #endif /* __LINUX_MFD_RN5T618_H */

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