power: Add support for the TPS65218 PMIC

Add a driver for the TPS65218 PMIC which is used by TI AM43xx SoCs and
may be used by TI AM335x SoCs.

Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
Tom Rini 2014-06-05 11:15:29 -04:00
parent 64ce2fbd6c
commit 86db550b38
3 changed files with 161 additions and 0 deletions

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@ -13,4 +13,5 @@ obj-$(CONFIG_POWER_MAX77686) += pmic_max77686.o
obj-$(CONFIG_POWER_PFUZE100) += pmic_pfuze100.o
obj-$(CONFIG_POWER_TPS65090) += pmic_tps65090.o
obj-$(CONFIG_POWER_TPS65217) += pmic_tps65217.o
obj-$(CONFIG_POWER_TPS65218) += pmic_tps65218.o
obj-$(CONFIG_POWER_TPS65910) += pmic_tps65910.o

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@ -0,0 +1,97 @@
/*
* (C) Copyright 2011-2013
* Texas Instruments, <www.ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <i2c.h>
#include <power/tps65218.h>
/**
* tps65218_reg_write() - Generic function that can write a TPS65218 PMIC
* register or bit field regardless of protection
* level.
*
* @prot_level: Register password protection. Use
* TPS65218_PROT_LEVEL_NONE,
* TPS65218_PROT_LEVEL_1 or TPS65218_PROT_LEVEL_2
* @dest_reg: Register address to write.
* @dest_val: Value to write.
* @mask: Bit mask (8 bits) to be applied. Function will only
* change bits that are set in the bit mask.
*
* @return: 0 for success, not 0 on failure, as per the i2c API
*/
int tps65218_reg_write(uchar prot_level, uchar dest_reg, uchar dest_val,
uchar mask)
{
uchar read_val;
uchar xor_reg;
int ret;
/*
* If we are affecting only a bit field, read dest_reg and apply the
* mask
*/
if (mask != TPS65218_MASK_ALL_BITS) {
ret = i2c_read(TPS65218_CHIP_PM, dest_reg, 1, &read_val, 1);
if (ret)
return ret;
read_val &= (~mask);
read_val |= (dest_val & mask);
dest_val = read_val;
}
if (prot_level > 0) {
xor_reg = dest_reg ^ TPS65218_PASSWORD_UNLOCK;
ret = i2c_write(TPS65218_CHIP_PM, TPS65218_PASSWORD, 1,
&xor_reg, 1);
if (ret)
return ret;
}
ret = i2c_write(TPS65218_CHIP_PM, dest_reg, 1, &dest_val, 1);
if (ret)
return ret;
if (prot_level == TPS65218_PROT_LEVEL_2) {
ret = i2c_write(TPS65218_CHIP_PM, TPS65218_PASSWORD, 1,
&xor_reg, 1);
if (ret)
return ret;
ret = i2c_write(TPS65218_CHIP_PM, dest_reg, 1, &dest_val, 1);
if (ret)
return ret;
}
return 0;
}
/**
* tps65218_voltage_update() - Function to change a voltage level, as this
* is a multi-step process.
* @dc_cntrl_reg: DC voltage control register to change.
* @volt_sel: New value for the voltage register
* @return: 0 for success, not 0 on failure.
*/
int tps65218_voltage_update(uchar dc_cntrl_reg, uchar volt_sel)
{
if ((dc_cntrl_reg != TPS65218_DCDC1) &&
(dc_cntrl_reg != TPS65218_DCDC2))
return 1;
/* set voltage level */
if (tps65218_reg_write(TPS65218_PROT_LEVEL_2, dc_cntrl_reg, volt_sel,
TPS65218_MASK_ALL_BITS))
return 1;
/* set GO bit to initiate voltage transition */
if (tps65218_reg_write(TPS65218_PROT_LEVEL_2, TPS65218_SLEW,
TPS65218_DCDC_GO, TPS65218_DCDC_GO))
return 1;
return 0;
}

63
include/power/tps65218.h Normal file
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@ -0,0 +1,63 @@
/*
* (C) Copyright 2014
* Texas Instruments, <www.ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __POWER_TPS65218_H__
#define __POWER_TPS65218_H__
/* I2C chip address */
#define TPS65218_CHIP_PM 0x24
/* Registers */
enum {
TPS65218_CHIPID = 0x00,
TPS65218_INT1,
TPS65218_INT2,
TPS65218_INT_MASK1,
TPS65218_INT_MASK2,
TPS65218_STATUS,
TPS65218_CONTROL,
TPS65218_FLAG,
TPS65218_PASSWORD = 0x10,
TPS65218_ENABLE1,
TPS65218_ENABLE2,
TPS65218_CONFIG1,
TPS65218_CONFIG2,
TPS65218_CONFIG3,
TPS65218_DCDC1,
TPS65218_DCDC2,
TPS65218_DCDC3,
TPS65218_DCDC4,
TPS65218_SLEW,
TPS65218_LDO1,
TPS65218_SEQ1 = 0x20,
TPS65218_SEQ2,
TPS65218_SEQ3,
TPS65218_SEQ4,
TPS65218_SEQ5,
TPS65218_SEQ6,
TPS65218_SEQ7,
TPS65218_PMIC_NUM_OF_REGS,
};
#define TPS65218_PROT_LEVEL_NONE 0x00
#define TPS65218_PROT_LEVEL_1 0x01
#define TPS65218_PROT_LEVEL_2 0x02
#define TPS65218_PASSWORD_LOCK_FOR_WRITE 0x00
#define TPS65218_PASSWORD_UNLOCK 0x7D
#define TPS65218_DCDC_GO 0x80
#define TPS65218_MASK_ALL_BITS 0xFF
#define TPS65218_DCDC_VOLT_SEL_1100MV 0x19
#define TPS65218_DCDC_VOLT_SEL_1330MV 0x30
int tps65218_reg_write(uchar prot_level, uchar dest_reg, uchar dest_val,
uchar mask);
int tps65218_voltage_update(uchar dc_cntrl_reg, uchar volt_sel);
#endif /* __POWER_TPS65218_H__ */