pmic: pmic_mc34vr500: Add a driver for the mc34vr500 pmic

This patch adds a simple pmic driver for the mc34vr500 pmic which
is used in conjunction with the fsl T1 and LS1 series SoC.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: York Sun <york.sun@nxp.com>

drivers/power/pmic/Kconfig

@@ -164,3 +164,10 @@ config PMIC_LP873X
 	---help---
 	The LP873X is a PMIC containing couple of LDOs and couple of SMPS.
 	This driver binds the pmic children.
+
+config POWER_MC34VR500
+	bool "Enable driver for Freescale MC34VR500 PMIC"
+	---help---
+	The MC34VR500 is used in conjunction with the FSL T1 and LS1 series
+	SoC. It provides 4 buck DC-DC convertors and 5 LDOs, and it is accessed
+	via an I2C interface.

drivers/power/pmic/Makefile

@@ -33,3 +33,4 @@ obj-$(CONFIG_POWER_TPS65218) += pmic_tps62362.o
 obj-$(CONFIG_POWER_TPS65218) += pmic_tps65218.o
 obj-$(CONFIG_POWER_TPS65910) += pmic_tps65910.o
 obj-$(CONFIG_POWER_HI6553) += pmic_hi6553.o
+obj-$(CONFIG_POWER_MC34VR500) += pmic_mc34vr500.o

drivers/power/pmic/pmic_mc34vr500.c

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2016 Freescale Semiconductor, Inc.
+ * Hou Zhiqiang <Zhiqiang.Hou@freescale.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <i2c.h>
+#include <power/pmic.h>
+#include <power/mc34vr500_pmic.h>
+
+int power_mc34vr500_init(unsigned char bus)
+{
+	static const char name[] = "MC34VR500";
+	struct pmic *p = pmic_alloc();
+
+	if (!p) {
+		printf("%s: POWER allocation error!\n", __func__);
+		return -ENOMEM;
+	}
+
+	p->name = name;
+	p->interface = PMIC_I2C;
+	p->number_of_regs = MC34VR500_NUM_OF_REGS;
+	p->hw.i2c.addr = MC34VR500_I2C_ADDR;
+	p->hw.i2c.tx_num = 1;
+	p->bus = bus;
+
+	return 0;
+}

include/power/mc34vr500_pmic.h

@@ -0,0 +1,166 @@
+/*
+ * Copyright 2016 Freescale Semiconductor, Inc.
+ * Hou Zhiqiang <Zhiqiang.Hou@freescale.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __MC34VR500_H_
+#define __MC34VR500_H_
+
+#include <power/pmic.h>
+
+#define MC34VR500_I2C_ADDR	0x08
+
+/* Drivers name */
+#define MC34VR500_REGULATOR_DRIVER	"mc34vr500_regulator"
+
+/* Register map */
+enum {
+	MC34VR500_DEVICEID		= 0x00,
+
+	MC34VR500_SILICONREVID		= 0x03,
+	MC34VR500_FABID,
+	MC34VR500_INTSTAT0,
+	MC34VR500_INTMASK0,
+	MC34VR500_INTSENSE0,
+	MC34VR500_INTSTAT1,
+	MC34VR500_INTMASK1,
+	MC34VR500_INTSENSE1,
+
+	MC34VR500_INTSTAT4		= 0x11,
+	MC34VR500_INTMASK4,
+	MC34VR500_INTSENSE4,
+
+	MC34VR500_PWRCTL		= 0x1B,
+
+	MC34VR500_SW1VOLT		= 0x2E,
+	MC34VR500_SW1STBY,
+	MC34VR500_SW1OFF,
+	MC34VR500_SW1MODE,
+	MC34VR500_SW1CONF,
+	MC34VR500_SW2VOLT,
+	MC34VR500_SW2STBY,
+	MC34VR500_SW2OFF,
+	MC34VR500_SW2MODE,
+	MC34VR500_SW2CONF,
+
+	MC34VR500_SW3VOLT		= 0x3C,
+	MC34VR500_SW3STBY,
+	MC34VR500_SW3OFF,
+	MC34VR500_SW3MODE,
+	MC34VR500_SW3CONF,
+
+	MC34VR500_SW4VOLT		= 0x4A,
+	MC34VR500_SW4STBY,
+	MC34VR500_SW4OFF,
+	MC34VR500_SW4MODE,
+	MC34VR500_SW4CONF,
+
+	MC34VR500_REFOUTCRTRL		= 0x6A,
+
+	MC34VR500_LDO1CTL		= 0x6D,
+	MC34VR500_LDO2CTL,
+	MC34VR500_LDO3CTL,
+	MC34VR500_LDO4CTL,
+	MC34VR500_LDO5CTL,
+
+	MC34VR500_PAGE_REGISTER		= 0x7F,
+
+	/* Internal RAM */
+	MC34VR500_SW1_VOLT		= 0xA8,
+	MC34VR500_SW1_SEQ,
+	MC34VR500_SW1_CONFIG,
+
+	MC34VR500_SW2_VOLT		= 0xAC,
+	MC34VR500_SW2_SEQ,
+	MC34VR500_SW2_CONFIG,
+
+	MC34VR500_SW3_VOLT		= 0xB0,
+	MC34VR500_SW3_SEQ,
+	MC34VR500_SW3_CONFIG,
+
+	MC34VR500_SW4_VOLT		= 0xB8,
+	MC34VR500_SW4_SEQ,
+	MC34VR500_SW4_CONFIG,
+
+	MC34VR500_REFOUT_SEQ		= 0xC4,
+
+	MC34VR500_LDO1_VOLT		= 0xCC,
+	MC34VR500_LDO1_SEQ,
+
+	MC34VR500_LDO2_VOLT		= 0xD0,
+	MC34VR500_LDO2_SEQ,
+
+	MC34VR500_LDO3_VOLT		= 0xD4,
+	MC34VR500_LDO3_SEQ,
+
+	MC34VR500_LDO4_VOLT		= 0xD8,
+	MC34VR500_LDO4_SEQ,
+
+	MC34VR500_LDO5_VOLT		= 0xDC,
+	MC34VR500_LDO5_SEQ,
+
+	MC34VR500_PU_CONFIG1		= 0xE0,
+
+	MC34VR500_TBB_POR		= 0xE4,
+
+	MC34VR500_PWRGD_EN		= 0xE8,
+
+	MC34VR500_NUM_OF_REGS,
+};
+
+/* Registor offset based on SWxVOLT register */
+#define MC34VR500_VOLT_OFFSET	0
+#define MC34VR500_STBY_OFFSET	1
+#define MC34VR500_OFF_OFFSET	2
+#define MC34VR500_MODE_OFFSET	3
+#define MC34VR500_CONF_OFFSET	4
+
+#define SW_MODE_MASK	0xf
+#define SW_MODE_SHIFT	0
+
+#define LDO_VOL_MASK	0xf
+#define LDO_EN		(1 << 4)
+#define LDO_MODE_SHIFT	4
+#define LDO_MODE_MASK	(1 << 4)
+#define LDO_MODE_OFF	0
+#define LDO_MODE_ON	1
+
+#define REFOUTEN	(1 << 4)
+
+/*
+ * Regulator Mode Control
+ *
+ * OFF: The regulator is switched off and the output voltage is discharged.
+ * PFM: In this mode, the regulator is always in PFM mode, which is useful
+ *      at light loads for optimized efficiency.
+ * PWM: In this mode, the regulator is always in PWM mode operation
+ *	regardless of load conditions.
+ * APS: In this mode, the regulator moves automatically between pulse
+ *	skipping mode and PWM mode depending on load conditions.
+ *
+ * SWxMODE[3:0]
+ * Normal Mode  |  Standby Mode	|      value
+ *   OFF		OFF		0x0
+ *   PWM		OFF		0x1
+ *   PFM		OFF		0x3
+ *   APS		OFF		0x4
+ *   PWM		PWM		0x5
+ *   PWM		APS		0x6
+ *   APS		APS		0x8
+ *   APS		PFM		0xc
+ *   PWM		PFM		0xd
+ */
+#define OFF_OFF		0x0
+#define PWM_OFF		0x1
+#define PFM_OFF		0x3
+#define APS_OFF		0x4
+#define PWM_PWM		0x5
+#define PWM_APS		0x6
+#define APS_APS		0x8
+#define APS_PFM		0xc
+#define PWM_PFM		0xd
+
+int power_mc34vr500_init(unsigned char bus);
+#endif /* __MC34VR500_PMIC_H_ */