1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2011-2013
4 * Texas Instruments, <www.ti.com>
9 #include <power/tps65217.h>
12 * tps65217_reg_read() - Generic function that can read a TPS65217 register
13 * @src_reg: Source register address
14 * @src_val: Address of destination variable
15 * @return: 0 for success, not 0 on failure.
17 int tps65217_reg_read(uchar src_reg, uchar *src_val)
19 return i2c_read(TPS65217_CHIP_PM, src_reg, 1, src_val, 1);
23 * tps65217_reg_write() - Generic function that can write a TPS65217 PMIC
24 * register or bit field regardless of protection
27 * @prot_level: Register password protection. Use
28 * TPS65217_PROT_LEVEL_NONE,
29 * TPS65217_PROT_LEVEL_1 or TPS65217_PROT_LEVEL_2
30 * @dest_reg: Register address to write.
31 * @dest_val: Value to write.
32 * @mask: Bit mask (8 bits) to be applied. Function will only
33 * change bits that are set in the bit mask.
35 * @return: 0 for success, not 0 on failure, as per the i2c API
37 int tps65217_reg_write(uchar prot_level, uchar dest_reg, uchar dest_val,
45 * If we are affecting only a bit field, read dest_reg and apply the
48 if (mask != TPS65217_MASK_ALL_BITS) {
49 ret = i2c_read(TPS65217_CHIP_PM, dest_reg, 1, &read_val, 1);
53 read_val |= (dest_val & mask);
58 xor_reg = dest_reg ^ TPS65217_PASSWORD_UNLOCK;
59 ret = i2c_write(TPS65217_CHIP_PM, TPS65217_PASSWORD, 1,
65 ret = i2c_write(TPS65217_CHIP_PM, dest_reg, 1, &dest_val, 1);
69 if (prot_level == TPS65217_PROT_LEVEL_2) {
70 ret = i2c_write(TPS65217_CHIP_PM, TPS65217_PASSWORD, 1,
75 ret = i2c_write(TPS65217_CHIP_PM, dest_reg, 1, &dest_val, 1);
84 * tps65217_voltage_update() - Function to change a voltage level, as this
85 * is a multi-step process.
86 * @dc_cntrl_reg: DC voltage control register to change.
87 * @volt_sel: New value for the voltage register
88 * @return: 0 for success, not 0 on failure.
90 int tps65217_voltage_update(uchar dc_cntrl_reg, uchar volt_sel)
92 if ((dc_cntrl_reg != TPS65217_DEFDCDC1) &&
93 (dc_cntrl_reg != TPS65217_DEFDCDC2) &&
94 (dc_cntrl_reg != TPS65217_DEFDCDC3))
97 /* set voltage level */
98 if (tps65217_reg_write(TPS65217_PROT_LEVEL_2, dc_cntrl_reg, volt_sel,
99 TPS65217_MASK_ALL_BITS))
102 /* set GO bit to initiate voltage transition */
103 if (tps65217_reg_write(TPS65217_PROT_LEVEL_2, TPS65217_DEFSLEW,
104 TPS65217_DCDC_GO, TPS65217_DCDC_GO))