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git.ipfire.org Git - people/ms/u-boot.git/blob - drivers/power/pmic/pmic_tps65217.c
2 * (C) Copyright 2011-2013
3 * Texas Instruments, <www.ti.com>
5 * SPDX-License-Identifier: GPL-2.0+
10 #include <power/tps65217.h>
13 * tps65217_reg_read() - Generic function that can read a TPS65217 register
14 * @src_reg: Source register address
15 * @src_val: Address of destination variable
16 * @return: 0 for success, not 0 on failure.
18 int tps65217_reg_read(uchar src_reg
, uchar
*src_val
)
20 return i2c_read(TPS65217_CHIP_PM
, src_reg
, 1, src_val
, 1);
24 * tps65217_reg_write() - Generic function that can write a TPS65217 PMIC
25 * register or bit field regardless of protection
28 * @prot_level: Register password protection. Use
29 * TPS65217_PROT_LEVEL_NONE,
30 * TPS65217_PROT_LEVEL_1 or TPS65217_PROT_LEVEL_2
31 * @dest_reg: Register address to write.
32 * @dest_val: Value to write.
33 * @mask: Bit mask (8 bits) to be applied. Function will only
34 * change bits that are set in the bit mask.
36 * @return: 0 for success, not 0 on failure, as per the i2c API
38 int tps65217_reg_write(uchar prot_level
, uchar dest_reg
, uchar dest_val
,
46 * If we are affecting only a bit field, read dest_reg and apply the
49 if (mask
!= TPS65217_MASK_ALL_BITS
) {
50 ret
= i2c_read(TPS65217_CHIP_PM
, dest_reg
, 1, &read_val
, 1);
54 read_val
|= (dest_val
& mask
);
59 xor_reg
= dest_reg
^ TPS65217_PASSWORD_UNLOCK
;
60 ret
= i2c_write(TPS65217_CHIP_PM
, TPS65217_PASSWORD
, 1,
66 ret
= i2c_write(TPS65217_CHIP_PM
, dest_reg
, 1, &dest_val
, 1);
70 if (prot_level
== TPS65217_PROT_LEVEL_2
) {
71 ret
= i2c_write(TPS65217_CHIP_PM
, TPS65217_PASSWORD
, 1,
76 ret
= i2c_write(TPS65217_CHIP_PM
, dest_reg
, 1, &dest_val
, 1);
85 * tps65217_voltage_update() - Function to change a voltage level, as this
86 * is a multi-step process.
87 * @dc_cntrl_reg: DC voltage control register to change.
88 * @volt_sel: New value for the voltage register
89 * @return: 0 for success, not 0 on failure.
91 int tps65217_voltage_update(uchar dc_cntrl_reg
, uchar volt_sel
)
93 if ((dc_cntrl_reg
!= TPS65217_DEFDCDC1
) &&
94 (dc_cntrl_reg
!= TPS65217_DEFDCDC2
) &&
95 (dc_cntrl_reg
!= TPS65217_DEFDCDC3
))
98 /* set voltage level */
99 if (tps65217_reg_write(TPS65217_PROT_LEVEL_2
, dc_cntrl_reg
, volt_sel
,
100 TPS65217_MASK_ALL_BITS
))
103 /* set GO bit to initiate voltage transition */
104 if (tps65217_reg_write(TPS65217_PROT_LEVEL_2
, TPS65217_DEFSLEW
,
105 TPS65217_DCDC_GO
, TPS65217_DCDC_GO
))