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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
parent
64ce2fbd6c
commit
86db550b38
3 changed files with 161 additions and 0 deletions
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@ -13,4 +13,5 @@ obj-$(CONFIG_POWER_MAX77686) += pmic_max77686.o
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obj-$(CONFIG_POWER_PFUZE100) += pmic_pfuze100.o
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obj-$(CONFIG_POWER_TPS65090) += pmic_tps65090.o
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obj-$(CONFIG_POWER_TPS65217) += pmic_tps65217.o
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obj-$(CONFIG_POWER_TPS65218) += pmic_tps65218.o
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obj-$(CONFIG_POWER_TPS65910) += pmic_tps65910.o
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97
drivers/power/pmic/pmic_tps65218.c
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97
drivers/power/pmic/pmic_tps65218.c
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@ -0,0 +1,97 @@
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/*
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* (C) Copyright 2011-2013
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* Texas Instruments, <www.ti.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <i2c.h>
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#include <power/tps65218.h>
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/**
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* tps65218_reg_write() - Generic function that can write a TPS65218 PMIC
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* register or bit field regardless of protection
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* level.
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*
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* @prot_level: Register password protection. Use
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* TPS65218_PROT_LEVEL_NONE,
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* TPS65218_PROT_LEVEL_1 or TPS65218_PROT_LEVEL_2
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* @dest_reg: Register address to write.
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* @dest_val: Value to write.
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* @mask: Bit mask (8 bits) to be applied. Function will only
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* change bits that are set in the bit mask.
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*
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* @return: 0 for success, not 0 on failure, as per the i2c API
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*/
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int tps65218_reg_write(uchar prot_level, uchar dest_reg, uchar dest_val,
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uchar mask)
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{
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uchar read_val;
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uchar xor_reg;
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int ret;
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/*
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* If we are affecting only a bit field, read dest_reg and apply the
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* mask
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*/
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if (mask != TPS65218_MASK_ALL_BITS) {
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ret = i2c_read(TPS65218_CHIP_PM, dest_reg, 1, &read_val, 1);
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if (ret)
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return ret;
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read_val &= (~mask);
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read_val |= (dest_val & mask);
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dest_val = read_val;
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}
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if (prot_level > 0) {
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xor_reg = dest_reg ^ TPS65218_PASSWORD_UNLOCK;
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ret = i2c_write(TPS65218_CHIP_PM, TPS65218_PASSWORD, 1,
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&xor_reg, 1);
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if (ret)
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return ret;
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}
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ret = i2c_write(TPS65218_CHIP_PM, dest_reg, 1, &dest_val, 1);
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if (ret)
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return ret;
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if (prot_level == TPS65218_PROT_LEVEL_2) {
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ret = i2c_write(TPS65218_CHIP_PM, TPS65218_PASSWORD, 1,
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&xor_reg, 1);
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if (ret)
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return ret;
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ret = i2c_write(TPS65218_CHIP_PM, dest_reg, 1, &dest_val, 1);
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if (ret)
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return ret;
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}
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return 0;
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}
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/**
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* tps65218_voltage_update() - Function to change a voltage level, as this
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* is a multi-step process.
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* @dc_cntrl_reg: DC voltage control register to change.
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* @volt_sel: New value for the voltage register
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* @return: 0 for success, not 0 on failure.
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*/
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int tps65218_voltage_update(uchar dc_cntrl_reg, uchar volt_sel)
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{
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if ((dc_cntrl_reg != TPS65218_DCDC1) &&
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(dc_cntrl_reg != TPS65218_DCDC2))
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return 1;
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/* set voltage level */
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if (tps65218_reg_write(TPS65218_PROT_LEVEL_2, dc_cntrl_reg, volt_sel,
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TPS65218_MASK_ALL_BITS))
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return 1;
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/* set GO bit to initiate voltage transition */
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if (tps65218_reg_write(TPS65218_PROT_LEVEL_2, TPS65218_SLEW,
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TPS65218_DCDC_GO, TPS65218_DCDC_GO))
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return 1;
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return 0;
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}
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63
include/power/tps65218.h
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63
include/power/tps65218.h
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@ -0,0 +1,63 @@
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/*
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* (C) Copyright 2014
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* Texas Instruments, <www.ti.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef __POWER_TPS65218_H__
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#define __POWER_TPS65218_H__
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/* I2C chip address */
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#define TPS65218_CHIP_PM 0x24
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/* Registers */
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enum {
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TPS65218_CHIPID = 0x00,
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TPS65218_INT1,
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TPS65218_INT2,
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TPS65218_INT_MASK1,
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TPS65218_INT_MASK2,
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TPS65218_STATUS,
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TPS65218_CONTROL,
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TPS65218_FLAG,
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TPS65218_PASSWORD = 0x10,
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TPS65218_ENABLE1,
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TPS65218_ENABLE2,
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TPS65218_CONFIG1,
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TPS65218_CONFIG2,
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TPS65218_CONFIG3,
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TPS65218_DCDC1,
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TPS65218_DCDC2,
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TPS65218_DCDC3,
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TPS65218_DCDC4,
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TPS65218_SLEW,
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TPS65218_LDO1,
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TPS65218_SEQ1 = 0x20,
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TPS65218_SEQ2,
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TPS65218_SEQ3,
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TPS65218_SEQ4,
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TPS65218_SEQ5,
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TPS65218_SEQ6,
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TPS65218_SEQ7,
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TPS65218_PMIC_NUM_OF_REGS,
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};
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#define TPS65218_PROT_LEVEL_NONE 0x00
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#define TPS65218_PROT_LEVEL_1 0x01
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#define TPS65218_PROT_LEVEL_2 0x02
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#define TPS65218_PASSWORD_LOCK_FOR_WRITE 0x00
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#define TPS65218_PASSWORD_UNLOCK 0x7D
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#define TPS65218_DCDC_GO 0x80
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#define TPS65218_MASK_ALL_BITS 0xFF
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#define TPS65218_DCDC_VOLT_SEL_1100MV 0x19
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#define TPS65218_DCDC_VOLT_SEL_1330MV 0x30
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int tps65218_reg_write(uchar prot_level, uchar dest_reg, uchar dest_val,
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uchar mask);
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int tps65218_voltage_update(uchar dc_cntrl_reg, uchar volt_sel);
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#endif /* __POWER_TPS65218_H__ */
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