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drivers/power/pmic: Add tps65910 driver

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Add a driver for the TPS65910 PMIC that is found in the AM335x GP EVM,
AM335x EVM SK and others.

Signed-off-by: Philip, Avinash <avinashphilip@ti.com>
[trini: Split and rework Avinash's changes into new drivers/power
framework]
Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
Philip, Avinash 2013-08-30 16:28:43 -04:00 committed by Tom Rini
parent 8b65b12a04
commit b04601a7f0
3 changed files with 161 additions and 0 deletions
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1
drivers/power/pmic/Makefile
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@ -14,6 +14,7 @@ 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-$(CONFIG_POWER_TPS65910) += pmic_tps65910.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)

83
drivers/power/pmic/pmic_tps65910.c Normal file
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@ -0,0 +1,83 @@
/*
* (C) Copyright 2011-2013
* Texas Instruments, <www.ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <i2c.h>
#include <power/tps65910.h>
/*
* tps65910_set_i2c_control() - Set the TPS65910 to be controlled via the I2C
* interface.
* @return: 0 on success, not 0 on failure
*/
int tps65910_set_i2c_control(void)
{
int ret;
uchar buf;
/* VDD1/2 voltage selection register access by control i/f */
ret = i2c_read(TPS65910_CTRL_I2C_ADDR, TPS65910_DEVCTRL_REG, 1,
&buf, 1);
if (ret)
return ret;
buf |= TPS65910_DEVCTRL_REG_SR_CTL_I2C_SEL_CTL_I2C;
return i2c_write(TPS65910_CTRL_I2C_ADDR, TPS65910_DEVCTRL_REG, 1,
&buf, 1);
}
/*
* tps65910_voltage_update() - Voltage switching for MPU frequency switching.
* @module: mpu - 0, core - 1
* @vddx_op_vol_sel: vdd voltage to set
* @return: 0 on success, not 0 on failure
*/
int tps65910_voltage_update(unsigned int module, unsigned char vddx_op_vol_sel)
{
uchar buf;
unsigned int reg_offset;
int ret;
if (module == MPU)
reg_offset = TPS65910_VDD1_OP_REG;
else
reg_offset = TPS65910_VDD2_OP_REG;
/* Select VDDx OP */
ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
if (ret)
return ret;
buf &= ~TPS65910_OP_REG_CMD_MASK;
ret = i2c_write(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
if (ret)
return ret;
/* Configure VDDx OP Voltage */
ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
if (ret)
return ret;
buf &= ~TPS65910_OP_REG_SEL_MASK;
buf |= vddx_op_vol_sel;
ret = i2c_write(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
if (ret)
return ret;
ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
if (ret)
return ret;
if ((buf & TPS65910_OP_REG_SEL_MASK) != vddx_op_vol_sel)
return 1;
return 0;
}

77
include/power/tps65910.h Normal file
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@ -0,0 +1,77 @@
/*
* (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/tps65910
*/
#ifndef __POWER_TPS65910_H__
#define __POWER_TPS65910_H__
#define MPU 0
#define CORE 1
#define TPS65910_SR_I2C_ADDR 0x12
#define TPS65910_CTRL_I2C_ADDR 0x2D
/* PMIC Register offsets */
enum {
TPS65910_VDD1_REG = 0x21,
TPS65910_VDD1_OP_REG = 0x22,
TPS65910_VDD2_REG = 0x24,
TPS65910_VDD2_OP_REG = 0x25,
TPS65910_DEVCTRL_REG = 0x3F,
};
/* VDD2 & VDD1 control register (VDD2_REG & VDD1_REG) */
#define TPS65910_VGAIN_SEL_MASK (0x3 << 6)
#define TPS65910_ILMAX_MASK (0x1 << 5)
#define TPS65910_TSTEP_MASK (0x7 << 2)
#define TPS65910_ST_MASK (0x3)
#define TPS65910_REG_VGAIN_SEL_X1 (0x0 << 6)
#define TPS65910_REG_VGAIN_SEL_X1_0 (0x1 << 6)
#define TPS65910_REG_VGAIN_SEL_X3 (0x2 << 6)
#define TPS65910_REG_VGAIN_SEL_X4 (0x3 << 6)
#define TPS65910_REG_ILMAX_1_0_A (0x0 << 5)
#define TPS65910_REG_ILMAX_1_5_A (0x1 << 5)
#define TPS65910_REG_TSTEP_ (0x0 << 2)
#define TPS65910_REG_TSTEP_12_5 (0x1 << 2)
#define TPS65910_REG_TSTEP_9_4 (0x2 << 2)
#define TPS65910_REG_TSTEP_7_5 (0x3 << 2)
#define TPS65910_REG_TSTEP_6_25 (0x4 << 2)
#define TPS65910_REG_TSTEP_4_7 (0x5 << 2)
#define TPS65910_REG_TSTEP_3_12 (0x6 << 2)
#define TPS65910_REG_TSTEP_2_5 (0x7 << 2)
#define TPS65910_REG_ST_OFF (0x0)
#define TPS65910_REG_ST_ON_HI_POW (0x1)
#define TPS65910_REG_ST_OFF_1 (0x2)
#define TPS65910_REG_ST_ON_LOW_POW (0x3)
/* VDD2 & VDD1 voltage selection register. (VDD2_OP_REG & VDD1_OP_REG) */
#define TPS65910_OP_REG_SEL (0x7F)
#define TPS65910_OP_REG_CMD_MASK (0x1 << 7)
#define TPS65910_OP_REG_CMD_OP (0x0 << 7)
#define TPS65910_OP_REG_CMD_SR (0x1 << 7)
#define TPS65910_OP_REG_SEL_MASK (0x7F)
#define TPS65910_OP_REG_SEL_0_9_5 (0x1F) /* 0.9500 V */
#define TPS65910_OP_REG_SEL_1_1_3 (0x2E) /* 1.1375 V */
#define TPS65910_OP_REG_SEL_1_2_0 (0x33) /* 1.2000 V */
#define TPS65910_OP_REG_SEL_1_2_6 (0x38) /* 1.2625 V */
#define TPS65910_OP_REG_SEL_1_3_2_5 (0x3D) /* 1.3250 V */
/* Device control register . (DEVCTRL_REG) */
#define TPS65910_DEVCTRL_REG_SR_CTL_I2C_MASK (0x1 << 4)
#define TPS65910_DEVCTRL_REG_SR_CTL_I2C_SEL_SR_I2C (0x0 << 4)
#define TPS65910_DEVCTRL_REG_SR_CTL_I2C_SEL_CTL_I2C (0x1 << 4)
int tps65910_set_i2c_control(void);
int tps65910_voltage_update(unsigned int module, unsigned char vddx_op_vol_sel);
#endif /* __POWER_TPS65910_H__ */