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Fix up Maxim MAX77686 driver

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... to fit into the naming convention

Change-Id: I4a7d81c4d6674d001fc831df863bd2343f6c636f
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/2020
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)
This commit is contained in:
Stefan Reinauer
2012-12-11 11:20:35 -08:00
committed by Stefan Reinauer
parent 0dbb329b7d
commit de48f0fd42
10 changed files with 67 additions and 6 deletions
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src/drivers/maxim/Kconfig Normal file
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##
## This file is part of the coreboot project.
##
## Copyright (C) 2012 The Chromium OS Authors.
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; version 2 of the License.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
##
source src/drivers/maxim/max77686/Kconfig

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src/drivers/maxim/Makefile.inc Normal file
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##
## This file is part of the coreboot project.
##
## Copyright (C) 2012 The Chromium OS Authors.
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; version 2 of the License.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
##
subdirs-$(CONFIG_DRIVERS_MAXIM_MAX77676) += max77686

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src/drivers/maxim/max77686/Kconfig Normal file
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##
## This file is part of the coreboot project.
##
## Copyright (C) 2012 The ChromiumOS Authors
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; version 2 of the License.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
##
config DRIVER_MAXIM_77686
bool
default n
help
Maxim 77686 power regulator

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src/drivers/maxim/max77686/Makefile.inc Normal file
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##
## This file is part of the coreboot project.
##
## Copyright (C) 2012 The ChromiumOS Authors
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; version 2 of the License.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
##
driver-$(CONFIG_DRIVER_MAXIM_77686) += max77686.c

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src/drivers/maxim/max77686/max77686.c Normal file
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/*
* Copyright (C) 2012 Samsung Electronics
* Alim Akhtar <alim.akhtar@samsung.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <smbus.h>
#include <max77686.h>
/* Chip register numbers (not exported from this module) */
enum {
REG_BBAT = 0x7e,
/* Bits for BBAT */
BBAT_BBCHOSTEN_MASK = 1 << 0,
BBAT_BBCVS_SHIFT = 3,
BBAT_BBCVS_MASK = 3 << BBAT_BBCVS_SHIFT,
};
/*
* Max77686 parameters values
* see max77686.h for parameters details
*/
struct max77686_para max77686_param[] = {/*{regnum, vol_addr, vol_bitpos,
vol_bitmask, reg_enaddr, reg_enbitpos, reg_enbitmask, reg_enbiton,
reg_enbitoff, vol_min, vol_div}*/
{PMIC_BUCK1, 0x11, 0x0, 0x3F, 0x10, 0x0, 0x3, 0x3, 0x0, 750, 50000},
{PMIC_BUCK2, 0x14, 0x0, 0xFF, 0x12, 0x4, 0x3, 0x1, 0x0, 600, 12500},
{PMIC_BUCK3, 0x1E, 0x0, 0xFF, 0x1C, 0x4, 0x3, 0x1, 0x0, 600, 12500},
{PMIC_BUCK4, 0x28, 0x0, 0xFF, 0x26, 0x4, 0x3, 0x1, 0x0, 600, 12500},
{PMIC_BUCK5, 0x31, 0x0, 0x3F, 0x30, 0x0, 0x3, 0x3, 0x0, 750, 50000},
{PMIC_BUCK6, 0x33, 0x0, 0x3F, 0x32, 0x0, 0x3, 0x3, 0x0, 750, 50000},
{PMIC_BUCK7, 0x35, 0x0, 0x3F, 0x34, 0x0, 0x3, 0x3, 0x0, 750, 50000},
{PMIC_BUCK8, 0x37, 0x0, 0x3F, 0x36, 0x0, 0x3, 0x3, 0x0, 750, 50000},
{PMIC_BUCK9, 0x39, 0x0, 0x3F, 0x38, 0x0, 0x3, 0x3, 0x0, 750, 50000},
{PMIC_LDO1, 0x40, 0x0, 0x3F, 0x40, 0x6, 0x3, 0x3, 0x0, 800, 25000},
{PMIC_LDO2, 0x41, 0x0, 0x3F, 0x41, 0x6, 0x3, 0x1, 0x0, 800, 25000},
{PMIC_LDO3, 0x42, 0x0, 0x3F, 0x42, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO4, 0x43, 0x0, 0x3F, 0x43, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO5, 0x44, 0x0, 0x3F, 0x44, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO6, 0x45, 0x0, 0x3F, 0x45, 0x6, 0x3, 0x1, 0x0, 800, 25000},
{PMIC_LDO7, 0x46, 0x0, 0x3F, 0x46, 0x6, 0x3, 0x1, 0x0, 800, 25000},
{PMIC_LDO8, 0x47, 0x0, 0x3F, 0x47, 0x6, 0x3, 0x1, 0x0, 800, 25000},
{PMIC_LDO9, 0x48, 0x0, 0x3F, 0x48, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO10, 0x49, 0x0, 0x3F, 0x49, 0x6, 0x3, 0x1, 0x0, 800, 50000},
{PMIC_LDO11, 0x4A, 0x0, 0x3F, 0x4A, 0x6, 0x3, 0x1, 0x0, 800, 50000},
{PMIC_LDO12, 0x4B, 0x0, 0x3F, 0x4B, 0x6, 0x3, 0x1, 0x0, 800, 50000},
{PMIC_LDO13, 0x4C, 0x0, 0x3F, 0x4C, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO14, 0x4D, 0x0, 0x3F, 0x4D, 0x6, 0x3, 0x1, 0x0, 800, 50000},
{PMIC_LDO15, 0x4E, 0x0, 0x3F, 0x4E, 0x6, 0x3, 0x1, 0x0, 800, 25000},
{PMIC_LDO16, 0x4F, 0x0, 0x3F, 0x4F, 0x6, 0x3, 0x1, 0x0, 800, 50000},
{PMIC_LDO17, 0x50, 0x0, 0x3F, 0x50, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO18, 0x51, 0x0, 0x3F, 0x51, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO19, 0x52, 0x0, 0x3F, 0x52, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO20, 0x53, 0x0, 0x3F, 0x53, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO21, 0x54, 0x0, 0x3F, 0x54, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO22, 0x55, 0x0, 0x3F, 0x55, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO23, 0x56, 0x0, 0x3F, 0x56, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO24, 0x57, 0x0, 0x3F, 0x57, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO25, 0x58, 0x0, 0x3F, 0x58, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO26, 0x59, 0x0, 0x3F, 0x59, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_EN32KHZ_CP, 0x0, 0x0, 0x0, 0x7F, 0x1, 0x1, 0x1, 0x0, 0x0, 0x0},
};
/*
* Write a value to a register
*
* @param chip_addr i2c addr for max77686
* @param reg reg number to write
* @param val value to be written
*
*/
static inline int max77686_i2c_write(unsigned char chip_addr,
unsigned int reg, unsigned char val)
{
return i2c_write(chip_addr, reg, 1, &val, 1);
}
/*
* Read a value from a register
*
* @param chip_addr i2c addr for max77686
* @param reg reg number to write
* @param val value to be written
*
*/
static inline int max77686_i2c_read(unsigned char chip_addr,
unsigned int reg, unsigned char *val)
{
return i2c_read(chip_addr, reg, 1, val, 1);
}
/*
* Enable the max77686 register
*
* @param reg register number of buck/ldo to be enabled
* @param enable enable or disable bit
*
* REG_DISABLE = 0,
needed to set the buck/ldo enable bit OFF
* @return Return 0 if ok, else -1
*/
static int max77686_enablereg(enum max77686_regnum reg, int enable)
{
struct max77686_para *pmic;
unsigned char read_data;
int ret;
pmic = &max77686_param[reg];
ret = max77686_i2c_read(MAX77686_I2C_ADDR, pmic->reg_enaddr,
&read_data);
if (ret != 0) {
debug("max77686 i2c read failed.\n");
return -1;
}
if (enable == REG_DISABLE) {
clrbits_8(&read_data,
pmic->reg_enbitmask << pmic->reg_enbitpos);
} else {
clrsetbits_8(&read_data,
pmic->reg_enbitmask << pmic->reg_enbitpos,
pmic->reg_enbiton << pmic->reg_enbitpos);
}
ret = max77686_i2c_write(MAX77686_I2C_ADDR,
pmic->reg_enaddr, read_data);
if (ret != 0) {
debug("max77686 i2c write failed.\n");
return -1;
}
return 0;
}
static int max77686_do_volsetting(enum max77686_regnum reg, unsigned int volt,
int enable, int volt_units)
{
struct max77686_para *pmic;
unsigned char read_data;
int vol_level = 0;
int ret;
pmic = &max77686_param[reg];
if (pmic->vol_addr == 0) {
debug("not a voltage register.\n");
return -1;
}
ret = max77686_i2c_read(MAX77686_I2C_ADDR, pmic->vol_addr, &read_data);
if (ret != 0) {
debug("max77686 i2c read failed.\n");
return -1;
}
if (volt_units == MAX77686_UV)
vol_level = volt - pmic->vol_min * 1000;
else
vol_level = (volt - pmic->vol_min) * 1000;
if (vol_level < 0) {
debug("Not a valid voltage level to set\n");
return -1;
}
vol_level /= pmic->vol_div;
clrsetbits_8(&read_data, pmic->vol_bitmask << pmic->vol_bitpos,
vol_level << pmic->vol_bitpos);
ret = max77686_i2c_write(MAX77686_I2C_ADDR, pmic->vol_addr, read_data);
if (ret != 0) {
debug("max77686 i2c write failed.\n");
return -1;
}
ret = max77686_enablereg(reg, enable);
if (ret != 0) {
debug("Failed to enable buck/ldo.\n");
return -1;
}
return 0;
}
int max77686_volsetting(enum max77686_regnum reg, unsigned int volt,
int enable, int volt_units)
{
int old_bus = i2c_get_bus_num();
int ret;
i2c_set_bus_num(0);
ret = max77686_do_volsetting(reg, volt, enable, volt_units);
i2c_set_bus_num(old_bus);
return ret;
}
int max77686_enable_32khz_cp(void)
{
i2c_set_bus_num(0);
return max77686_enablereg(PMIC_EN32KHZ_CP, REG_ENABLE);
}
int max77686_disable_backup_batt(void)
{
unsigned char val;
int ret;
i2c_set_bus_num(0);
ret = max77686_i2c_read(MAX77686_I2C_ADDR, REG_BBAT, &val);
if (ret) {
debug("max77686 i2c read failed\n");
return ret;
}
/* If we already have the correct values, exit */
if ((val & (BBAT_BBCVS_MASK | BBAT_BBCHOSTEN_MASK)) ==
BBAT_BBCVS_MASK)
return 0;
/* First disable charging */
val &= ~BBAT_BBCHOSTEN_MASK;
ret = max77686_i2c_write(MAX77686_I2C_ADDR, REG_BBAT, val);
if (ret) {
debug("max77686 i2c write failed\n");
return -1;
}
/* Finally select 3.5V to minimize power consumption */
val |= BBAT_BBCVS_MASK;
ret = max77686_i2c_write(MAX77686_I2C_ADDR, REG_BBAT, val);
if (ret) {
debug("max77686 i2c write failed\n");
return -1;
}
return 0;
}

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/*
* Copyright (C) 2012 Samsung Electronics
* Alim Akhtar <alim.akhtar@samsung.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef __MAX77686_H_
#define __MAX77686_H_
enum max77686_regnum {
PMIC_BUCK1 = 0,
PMIC_BUCK2,
PMIC_BUCK3,
PMIC_BUCK4,
PMIC_BUCK5,
PMIC_BUCK6,
PMIC_BUCK7,
PMIC_BUCK8,
PMIC_BUCK9,
PMIC_LDO1,
PMIC_LDO2,
PMIC_LDO3,
PMIC_LDO4,
PMIC_LDO5,
PMIC_LDO6,
PMIC_LDO7,
PMIC_LDO8,
PMIC_LDO9,
PMIC_LDO10,
PMIC_LDO11,
PMIC_LDO12,
PMIC_LDO13,
PMIC_LDO14,
PMIC_LDO15,
PMIC_LDO16,
PMIC_LDO17,
PMIC_LDO18,
PMIC_LDO19,
PMIC_LDO20,
PMIC_LDO21,
PMIC_LDO22,
PMIC_LDO23,
PMIC_LDO24,
PMIC_LDO25,
PMIC_LDO26,
PMIC_EN32KHZ_CP,
};
/**
* struct max77686_para - max77686 register parameters
* @param vol_addr i2c address of the given buck/ldo register
* @param vol_bitpos bit position to be set or clear within register
* @param vol_bitmask bit mask value
* @param reg_enaddr control register address, which enable the given
* given buck/ldo.
* @param reg_enbitpos bit position to be enabled
* @param reg_enbiton value to be written to buck/ldo to make it ON
* @param reg_enbitoff value to be written to buck/ldo to make it OFF
* @param vol_min minimum voltage level supported by given buck/ldo
* @param vol_div voltage division value of given buck/ldo
*/
struct max77686_para {
enum max77686_regnum regnum;
u8 vol_addr;
u8 vol_bitpos;
u8 vol_bitmask;
u8 reg_enaddr;
u8 reg_enbitpos;
u8 reg_enbitmask;
u8 reg_enbiton;
u8 reg_enbitoff;
u32 vol_min;
u32 vol_div;
};
/* I2C device address for pmic max77686 */
#define MAX77686_I2C_ADDR (0x12 >> 1)
enum {
REG_DISABLE = 0,
REG_ENABLE
};
enum {
MAX77686_MV = 0, /* mili volt */
MAX77686_UV /* micro volt */
};
/**
* This function enables the 32KHz coprocessor clock.
*
* Return 0 if ok, else -1
*/
int max77686_enable_32khz_cp(void);
/**
* Set the required voltage level of pmic
*
* @param reg register number of buck/ldo to be set
* @param volt voltage level to be set
* @param enable enable or disable bit
* @param volt_units MAX77686_MV or MAX77686_UV, unit of the
* voltage parameters
*
* @return Return 0 if ok, else -1
*/
int max77686_volsetting(enum max77686_regnum reg, unsigned int volt,
int enable, int volt_units);
/**
* Disable charging of the RTC backup battery
*
* @return Return 0 if ok, else -1
*/
int max77686_disable_backup_batt(void);
#endif /* __MAX77686_PMIC_H_ */