drivers/power/pmic: Add tps65217 driver

Add a driver for the TPS65217 PMIC that is found in the Beaglebone
family of boards.

Signed-off-by: Greg Guyotte <gguyotte@ti.com>
[trini: Split and rework Greg's changes into new drivers/power
framework]
Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
Greg Guyotte 2013-08-30 16:28:42 -04:00 committed by Tom Rini
parent fd070d811d
commit 8b65b12a04
3 changed files with 192 additions and 0 deletions

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@ -13,6 +13,7 @@ COBJS-$(CONFIG_POWER_MAX8998) += pmic_max8998.o
COBJS-$(CONFIG_POWER_MAX8997) += pmic_max8997.o
COBJS-$(CONFIG_POWER_MUIC_MAX8997) += muic_max8997.o
COBJS-$(CONFIG_POWER_MAX77686) += pmic_max77686.o
COBJS-$(CONFIG_POWER_TPS65217) += pmic_tps65217.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)

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@ -0,0 +1,109 @@
/*
* (C) Copyright 2011-2013
* Texas Instruments, <www.ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <i2c.h>
#include <power/tps65217.h>
/**
* tps65217_reg_read() - Generic function that can read a TPS65217 register
* @src_reg: Source register address
* @src_val: Address of destination variable
* @return: 0 for success, not 0 on failure.
*/
int tps65217_reg_read(uchar src_reg, uchar *src_val)
{
return i2c_read(TPS65217_CHIP_PM, src_reg, 1, src_val, 1);
}
/**
* tps65217_reg_write() - Generic function that can write a TPS65217 PMIC
* register or bit field regardless of protection
* level.
*
* @prot_level: Register password protection. Use
* TPS65217_PROT_LEVEL_NONE,
* TPS65217_PROT_LEVEL_1 or TPS65217_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 tps65217_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 != TPS65217_MASK_ALL_BITS) {
ret = i2c_read(TPS65217_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 ^ TPS65217_PASSWORD_UNLOCK;
ret = i2c_write(TPS65217_CHIP_PM, TPS65217_PASSWORD, 1,
&xor_reg, 1);
if (ret)
return ret;
}
ret = i2c_write(TPS65217_CHIP_PM, dest_reg, 1, &dest_val, 1);
if (ret)
return ret;
if (prot_level == TPS65217_PROT_LEVEL_2) {
ret = i2c_write(TPS65217_CHIP_PM, TPS65217_PASSWORD, 1,
&xor_reg, 1);
if (ret)
return ret;
ret = i2c_write(TPS65217_CHIP_PM, dest_reg, 1, &dest_val, 1);
if (ret)
return ret;
}
return 0;
}
/**
* tps65217_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 tps65217_voltage_update(uchar dc_cntrl_reg, uchar volt_sel)
{
if ((dc_cntrl_reg != TPS65217_DEFDCDC1) &&
(dc_cntrl_reg != TPS65217_DEFDCDC2) &&
(dc_cntrl_reg != TPS65217_DEFDCDC3))
return 1;
/* set voltage level */
if (tps65217_reg_write(TPS65217_PROT_LEVEL_2, dc_cntrl_reg, volt_sel,
TPS65217_MASK_ALL_BITS))
return 1;
/* set GO bit to initiate voltage transition */
if (tps65217_reg_write(TPS65217_PROT_LEVEL_2, TPS65217_DEFSLEW,
TPS65217_DCDC_GO, TPS65217_DCDC_GO))
return 1;
return 0;
}

82
include/power/tps65217.h Normal file
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@ -0,0 +1,82 @@
/*
* (C) Copyright 2011-2013
* Texas Instruments, <www.ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*
* For more details, please see the TRM at http://www.ti.com/product/tps65217a
*/
#ifndef __POWER_TPS65217_H__
#define __POWER_TPS65217_H__
/* I2C chip address */
#define TPS65217_CHIP_PM 0x24
/* Registers */
enum {
TPS65217_CHIPID = 0x00,
TPS65217_POWER_PATH,
TPS65217_INTERRUPT,
TPS65217_CHGCONFIG0,
TPS65217_CHGCONFIG1,
TPS65217_CHGCONFIG2,
TPS65217_CHGCONFIG3,
TPS65217_WLEDCTRL1,
TPS65217_WLEDCTRL2,
TPS65217_MUXCTRL,
TPS65217_STATUS,
TPS65217_PASSWORD,
TPS65217_PGOOD,
TPS65217_DEFPG,
TPS65217_DEFDCDC1,
TPS65217_DEFDCDC2,
TPS65217_DEFDCDC3,
TPS65217_DEFSLEW,
TPS65217_DEFLDO1,
TPS65217_DEFLDO2,
TPS65217_DEFLS1,
TPS65217_DEFLS2,
TPS65217_ENABLE,
TPS65217_DEFUVLO,
TPS65217_SEQ1,
TPS65217_SEQ2,
TPS65217_SEQ3,
TPS65217_SEQ4,
TPS65217_SEQ5,
TPS65217_SEQ6,
TPS65217_PMIC_NUM_OF_REGS,
};
#define TPS65217_PROT_LEVEL_NONE 0x00
#define TPS65217_PROT_LEVEL_1 0x01
#define TPS65217_PROT_LEVEL_2 0x02
#define TPS65217_PASSWORD_LOCK_FOR_WRITE 0x00
#define TPS65217_PASSWORD_UNLOCK 0x7D
#define TPS65217_DCDC_GO 0x80
#define TPS65217_MASK_ALL_BITS 0xFF
#define TPS65217_USB_INPUT_CUR_LIMIT_MASK 0x03
#define TPS65217_USB_INPUT_CUR_LIMIT_100MA 0x00
#define TPS65217_USB_INPUT_CUR_LIMIT_500MA 0x01
#define TPS65217_USB_INPUT_CUR_LIMIT_1300MA 0x02
#define TPS65217_USB_INPUT_CUR_LIMIT_1800MA 0x03
#define TPS65217_DCDC_VOLT_SEL_1275MV 0x0F
#define TPS65217_DCDC_VOLT_SEL_1325MV 0x11
#define TPS65217_LDO_MASK 0x1F
#define TPS65217_LDO_VOLTAGE_OUT_1_8 0x06
#define TPS65217_LDO_VOLTAGE_OUT_3_3 0x1F
#define TPS65217_PWR_SRC_USB_BITMASK 0x4
#define TPS65217_PWR_SRC_AC_BITMASK 0x8
int tps65217_reg_read(uchar src_reg, uchar *src_val);
int tps65217_reg_write(uchar prot_level, uchar dest_reg, uchar dest_val,
uchar mask);
int tps65217_voltage_update(uchar dc_cntrl_reg, uchar volt_sel);
#endif /* __POWER_TPS65217_H__ */