diff options
| -rw-r--r-- | drivers/power/pmic/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/pmic/pmic_tps65217.c | 109 | ||||
| -rw-r--r-- | include/power/tps65217.h | 82 |
3 files changed, 192 insertions, 0 deletions
diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile index f054470..ac2b625 100644 --- a/drivers/power/pmic/Makefile +++ b/drivers/power/pmic/Makefile @@ -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) diff --git a/drivers/power/pmic/pmic_tps65217.c b/drivers/power/pmic/pmic_tps65217.c new file mode 100644 index 0000000..36e9024 --- /dev/null +++ b/drivers/power/pmic/pmic_tps65217.c @@ -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; +} diff --git a/include/power/tps65217.h b/include/power/tps65217.h new file mode 100644 index 0000000..e8c8475 --- /dev/null +++ b/include/power/tps65217.h @@ -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__ */ |