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power: Add support for LTC3676 PMIC 

The LTC3676 PMIC includes four DC/DC converters, and three 300mA
LDO Regulators (two Adjustable). The DC/DC converters are adjustable based
on a resistor devider (board-specific).

This adds support for the LTC3676 by creating a namespace unique init function
that uses the PMIC API to allocate a pmic and defines the registers.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Acked-by: Stefano Babic <sbabic@denx.de>
utp
Tim Harvey 2014-04-22 21:53:58 -07:00 committed by Stefano Babic
parent 17449272a0
commit 5e2f01772a
3 changed files with 84 additions and 0 deletions
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1
drivers/power/pmic/Makefile
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@ -5,6 +5,7 @@
# SPDX-License-Identifier: GPL-2.0+
#
obj-$(CONFIG_POWER_LTC3676) += pmic_ltc3676.o
obj-$(CONFIG_POWER_MAX8998) += pmic_max8998.o
obj-$(CONFIG_POWER_MAX8997) += pmic_max8997.o
obj-$(CONFIG_POWER_MUIC_MAX8997) += muic_max8997.o

32
drivers/power/pmic/pmic_ltc3676.c 100644
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@ -0,0 +1,32 @@
/*
* Copyright (C) 2014 Gateworks Corporation
* Tim Harvey <tharvey@gateworks.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <errno.h>
#include <i2c.h>
#include <power/pmic.h>
#include <power/ltc3676_pmic.h>
int power_ltc3676_init(unsigned char bus)
{
static const char name[] = "LTC3676_PMIC";
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 = LTC3676_NUM_OF_REGS;
p->hw.i2c.addr = CONFIG_POWER_LTC3676_I2C_ADDR;
p->hw.i2c.tx_num = 1;
p->bus = bus;
return 0;
}

51
include/power/ltc3676_pmic.h 100644
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@ -0,0 +1,51 @@
/*
* Copyright (C) 2014 Gateworks Corporation
* Tim Harvey <tharvey@gateworks.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __LTC3676_PMIC_H_
#define __LTC3676_PMIC_H_
/* LTC3676 registers */
enum {
LTC3676_BUCK1 = 0x01,
LTC3676_BUCK2 = 0x02,
LTC3676_BUCK3 = 0x03,
LTC3676_BUCK4 = 0x04,
LTC3676_LDOA = 0x05,
LTC3676_LDOB = 0x06,
LTC3676_SQD1 = 0x07,
LTC3676_SQD2 = 0x08,
LTC3676_CNTRL = 0x09,
LTC3676_DVB1A = 0x0A,
LTC3676_DVB1B = 0x0B,
LTC3676_DVB2A = 0x0C,
LTC3676_DVB2B = 0x0D,
LTC3676_DVB3A = 0x0E,
LTC3676_DVB3B = 0x0F,
LTC3676_DVB4A = 0x10,
LTC3676_DVB4B = 0x11,
LTC3676_MSKIRQ = 0x12,
LTC3676_MSKPG = 0x13,
LTC3676_USER = 0x14,
LTC3676_HRST = 0x1E,
LTC3676_CLIRQ = 0x1F,
LTC3676_IRQSTAT = 0x15,
LTC3676_PGSTATL = 0x16,
LTC3676_PGSTATR = 0x17,
LTC3676_NUM_OF_REGS = 0x20,
};
/*
* SW Configuration
*/
#define LTC3676_DVB_MASK 0x1f
#define LTC3676_PGOOD_MASK (1<<5)
#define LTC3676_REF_SELA (0<<5)
#define LTC3676_REF_SELB (1<<5)
int power_ltc3676_init(unsigned char bus);
#endif