power: pmic: add Ricoh RN5T567 PMIC support

Add device model enabled PMIC driver for Ricoh RN5T567 PMIC used
on Colibri iMX7.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

doc/device-tree-bindings/pmic/rn5t567.txt

@@ -0,0 +1,17 @@
+Ricoh RN5T567 PMIC
+
+This file describes the binding info for the PMIC driver.
+
+Required properties:
+- compatible: "ricoh,rn5t567"
+- reg: depending on strapping, e.g. 0x33
+
+With those two properties, the PMIC device can be used to read/write
+registers.
+
+Example:
+
+rn5t567@33 {
+	compatible = "ricoh,rn5t567";
+	reg = <0x33>;
+};

drivers/power/pmic/Kconfig

@@ -127,6 +127,14 @@ config PMIC_S5M8767
 	driver provides basic register access and sets up the attached
 	regulators if regulator support is enabled.
 
+config PMIC_RN5T567
+	bool "Enable driver for Ricoh RN5T567 PMIC"
+	depends on DM_PMIC
+	---help---
+	The RN5T567 is a PMIC with 4 step-down DC/DC converters, 5 LDO
+	regulators Real-Time Clock and 4 GPIOs. This driver provides
+	register access only.
+
 config PMIC_TPS65090
 	bool "Enable driver for Texas Instruments TPS65090 PMIC"
 	depends on DM_PMIC

drivers/power/pmic/Makefile

@@ -13,6 +13,7 @@ obj-$(CONFIG_DM_PMIC_SANDBOX) += sandbox.o i2c_pmic_emul.o
 obj-$(CONFIG_PMIC_ACT8846) += act8846.o
 obj-$(CONFIG_PMIC_PM8916) += pm8916.o
 obj-$(CONFIG_PMIC_RK808) += rk808.o
+obj-$(CONFIG_PMIC_RN5T567) += rn5t567.o
 obj-$(CONFIG_PMIC_TPS65090) += tps65090.o
 obj-$(CONFIG_PMIC_S5M8767) += s5m8767.o
 

drivers/power/pmic/rn5t567.c

@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2016 Toradex AG
+ * Stefan Agner <stefan.agner@toradex.com>
+ *
+ * SPDX-License-Identifier:      GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <libfdt.h>
+#include <power/rn5t567_pmic.h>
+#include <power/pmic.h>
+
+static int rn5t567_reg_count(struct udevice *dev)
+{
+	return RN5T567_NUM_OF_REGS;
+}
+
+static int rn5t567_write(struct udevice *dev, uint reg, const uint8_t *buff,
+			  int len)
+{
+	int ret;
+
+	ret = dm_i2c_write(dev, reg, buff, len);
+	if (ret) {
+		debug("write error to device: %p register: %#x!", dev, reg);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int rn5t567_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
+{
+	int ret;
+
+	ret = dm_i2c_read(dev, reg, buff, len);
+	if (ret) {
+		debug("read error from device: %p register: %#x!", dev, reg);
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct dm_pmic_ops rn5t567_ops = {
+	.reg_count = rn5t567_reg_count,
+	.read = rn5t567_read,
+	.write = rn5t567_write,
+};
+
+static const struct udevice_id rn5t567_ids[] = {
+	{ .compatible = "ricoh,rn5t567" },
+	{ }
+};
+
+U_BOOT_DRIVER(pmic_rn5t567) = {
+	.name = "rn5t567 pmic",
+	.id = UCLASS_PMIC,
+	.of_match = rn5t567_ids,
+	.ops = &rn5t567_ops,
+};

include/power/rn5t567_pmic.h

@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2016 Toradex AG
+ * Stefan Agner <stefan.agner@toradex.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+#ifndef __RN5T567_PMIC_H_
+#define __RN5T567_PMIC_H_
+
+/* RN5T567 registers */
+enum {
+	RN5T567_LSIVER		= 0x00,
+	RN5T567_OTPVER		= 0x01,
+	RN5T567_IODAC		= 0x02,
+	RN5T567_VINDAC		= 0x03,
+	RN5T567_OUT32KEN	= 0x05,
+
+	RN5T567_CPUCNT		= 0x06,
+
+	RN5T567_PSWR		= 0x07,
+	RN5T567_PONHIS		= 0x09,
+	RN5T567_POFFHIS		= 0x0A,
+	RN5T567_WATCHDOG	= 0x0B,
+	RN5T567_WATCHDOGCNT	= 0x0C,
+	RN5T567_PWRFUNC		= 0x0D,
+	RN5T567_SLPCNT		= 0x0E,
+	RN5T567_REPCNT		= 0x0F,
+	RN5T567_PWRONTIMSET	= 0x10,
+	RN5T567_NOETIMSETCNT	= 0x11,
+	RN5T567_PWRIREN		= 0x12,
+	RN5T567_PWRIRQ		= 0x13,
+	RN5T567_PWRMON		= 0x14,
+	RN5T567_PWRIRSEL	= 0x15,
+
+	RN5T567_DC1_SLOT	= 0x16,
+	RN5T567_DC2_SLOT	= 0x17,
+	RN5T567_DC3_SLOT	= 0x18,
+	RN5T567_DC4_SLOT	= 0x19,
+
+	RN5T567_LDO1_SLOT	= 0x1B,
+	RN5T567_LDO2_SLOT	= 0x1C,
+	RN5T567_LDO3_SLOT	= 0x1D,
+	RN5T567_LDO4_SLOT	= 0x1E,
+	RN5T567_LDO5_SLOT	= 0x1F,
+
+	RN5T567_PSO0_SLOT	= 0x25,
+	RN5T567_PSO1_SLOT	= 0x26,
+	RN5T567_PSO2_SLOT	= 0x27,
+	RN5T567_PSO3_SLOT	= 0x28,
+
+	RN5T567_LDORTC1_SLOT	= 0x2A,
+
+	RN5T567_DC1CTL		= 0x2C,
+	RN5T567_DC1CTL2		= 0x2D,
+	RN5T567_DC2CTL		= 0x2E,
+	RN5T567_DC2CTL2		= 0x2F,
+	RN5T567_DC3CTL		= 0x30,
+	RN5T567_DC3CTL2		= 0x31,
+	RN5T567_DC4CTL		= 0x32,
+	RN5T567_DC4CTL2		= 0x33,
+
+	RN5T567_DC1DAC		= 0x36,
+	RN5T567_DC2DAC		= 0x37,
+	RN5T567_DC3DAC		= 0x38,
+	RN5T567_DC4DAC		= 0x39,
+
+	RN5T567_DC1DAC_SLP	= 0x3B,
+	RN5T567_DC2DAC_SLP	= 0x3C,
+	RN5T567_DC3DAC_SLP	= 0x3D,
+	RN5T567_DC4DAC_SLP	= 0x3E,
+
+	RN5T567_DCIREN		= 0x40,
+	RN5T567_DCIRQ		= 0x41,
+	RN5T567_DCIRMON		= 0x42,
+
+	RN5T567_LDOEN1		= 0x44,
+	RN5T567_LDOEN2		= 0x45,
+	RN5T567_LDODIS1		= 0x46,
+
+	RN5T567_LDO1DAC		= 0x4C,
+	RN5T567_LDO2DAC		= 0x4D,
+	RN5T567_LDO3DAC		= 0x4E,
+	RN5T567_LDO4DAC		= 0x4F,
+	RN5T567_LDO5DAC		= 0x50,
+
+	RN5T567_LDORTC1DAC	= 0x56,
+	RN5T567_LDORTC2DAC	= 0x57,
+
+	RN5T567_LDO1DAC_SLP	= 0x58,
+	RN5T567_LDO2DAC_SLP	= 0x59,
+	RN5T567_LDO3DAC_SLP	= 0x5A,
+	RN5T567_LDO4DAC_SLP	= 0x5B,
+	RN5T567_LDO5DAC_SLP	= 0x5C,
+
+	RN5T567_IOSEL		= 0x90,
+	RN5T567_IOOUT		= 0x91,
+	RN5T567_GPEDGE1		= 0x92,
+	RN5T567_EN_GPIR		= 0x94,
+	RN5T567_IR_GPR		= 0x95,
+	RN5T567_IR_GPF		= 0x96,
+	RN5T567_MON_IOIN	= 0x97,
+	RN5T567_GPLED_FUNC	= 0x98,
+	RN5T567_INTPOL		= 0x9C,
+	RN5T567_INTEN		= 0x9D,
+	RN5T567_INTMON		= 0x9E,
+
+	RN5T567_PREVINDAC	= 0xB0,
+	RN5T567_OVTEMP		= 0xBC,
+
+	RN5T567_NUM_OF_REGS	= 0xBF,
+};
+
+#endif