pmic: add tps62362 simple wrapper code

This regulator is used with AM437x IDK to feed
VDD_MPU, without means to scale VDD_MPU we can't
support higher frequencies.

Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/power/pmic/Makefile

@@ -14,5 +14,6 @@ obj-$(CONFIG_POWER_PFUZE100) += pmic_pfuze100.o
 obj-$(CONFIG_POWER_TPS65090_I2C) += pmic_tps65090.o
 obj-$(CONFIG_POWER_TPS65090_EC) += pmic_tps65090_ec.o
 obj-$(CONFIG_POWER_TPS65217) += pmic_tps65217.o
+obj-$(CONFIG_POWER_TPS65218) += pmic_tps62362.o
 obj-$(CONFIG_POWER_TPS65218) += pmic_tps65218.o
 obj-$(CONFIG_POWER_TPS65910) += pmic_tps65910.o

drivers/power/pmic/pmic_tps62362.c

@@ -0,0 +1,47 @@
+/*
+ * (C) Copyright 2014 Texas Instruments Incorporated -  http://www.ti.com
+ * Author: Felipe Balbi <balbi@ti.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <asm/errno.h>
+#include <power/pmic.h>
+#include <power/tps62362.h>
+
+/**
+ * tps62362_voltage_update() - Function to change a voltage level, as this
+ *			       is a multi-step process.
+ * @reg:	Register address to write to
+ * @volt_sel:	Voltage register value to write
+ * @return:	0 on success, 1 on failure
+ */
+int tps62362_voltage_update(unsigned char reg, unsigned char volt_sel)
+{
+	if (reg > TPS62362_NUM_REGS)
+		return 1;
+
+	return i2c_write(TPS62362_I2C_ADDR, reg, 1, &volt_sel, 1);
+}
+
+int power_tps62362_init(unsigned char bus)
+{
+	static const char name[] = "TPS62362";
+	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 = TPS62362_NUM_REGS;
+	p->hw.i2c.addr = TPS62362_I2C_ADDR;
+	p->hw.i2c.tx_num = 1;
+	p->bus = bus;
+
+	return 0;
+}

include/power/tps62362.h

@@ -0,0 +1,29 @@
+/*
+ * (C) Copyright 2014 Texas Instruments Incorporated - http://www.ti.com
+ * Author: Felipe Balbi <balbi@ti.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __POWER_TPS62362_H__
+#define __POWER_TPS62362_H__
+
+/* I2C chip address */
+#define TPS62362_I2C_ADDR			0x60
+
+/* Registers */
+#define TPS62362_SET0				0x00
+#define TPS62362_SET1				0x01
+#define TPS62362_SET2				0x02
+#define TPS62362_SET3				0x03
+#define TPS62362_NUM_REGS			4
+
+#define TPS62362_DCDC_VOLT_SEL_0950MV		0x12
+#define TPS62362_DCDC_VOLT_SEL_1100MV		0x21
+#define TPS62362_DCDC_VOLT_SEL_1200MV		0x2b
+#define TPS62362_DCDC_VOLT_SEL_1260MV		0x31
+#define TPS62362_DCDC_VOLT_SEL_1330MV		0x38
+
+int tps62362_voltage_update(unsigned char reg, unsigned char volt_sel);
+int power_tps62362_init(unsigned char bus);
+#endif	/* __POWER_TPS62362_H__ */