1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * (C) Copyright 2012
3*4882a593Smuzhiyun * Henrik Nordstrom <henrik@henriknordstrom.net>
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun #include <common.h>
8*4882a593Smuzhiyun #include <command.h>
9*4882a593Smuzhiyun #include <asm/arch/pmic_bus.h>
10*4882a593Smuzhiyun #include <axp_pmic.h>
11*4882a593Smuzhiyun
axp152_mvolt_to_target(int mvolt,int min,int max,int div)12*4882a593Smuzhiyun static u8 axp152_mvolt_to_target(int mvolt, int min, int max, int div)
13*4882a593Smuzhiyun {
14*4882a593Smuzhiyun if (mvolt < min)
15*4882a593Smuzhiyun mvolt = min;
16*4882a593Smuzhiyun else if (mvolt > max)
17*4882a593Smuzhiyun mvolt = max;
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun return (mvolt - min) / div;
20*4882a593Smuzhiyun }
21*4882a593Smuzhiyun
axp_set_dcdc2(unsigned int mvolt)22*4882a593Smuzhiyun int axp_set_dcdc2(unsigned int mvolt)
23*4882a593Smuzhiyun {
24*4882a593Smuzhiyun int rc;
25*4882a593Smuzhiyun u8 current, target;
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun target = axp152_mvolt_to_target(mvolt, 700, 2275, 25);
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun /* Do we really need to be this gentle? It has built-in voltage slope */
30*4882a593Smuzhiyun while ((rc = pmic_bus_read(AXP152_DCDC2_VOLTAGE, ¤t)) == 0 &&
31*4882a593Smuzhiyun current != target) {
32*4882a593Smuzhiyun if (current < target)
33*4882a593Smuzhiyun current++;
34*4882a593Smuzhiyun else
35*4882a593Smuzhiyun current--;
36*4882a593Smuzhiyun rc = pmic_bus_write(AXP152_DCDC2_VOLTAGE, current);
37*4882a593Smuzhiyun if (rc)
38*4882a593Smuzhiyun break;
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun return rc;
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun
axp_set_dcdc3(unsigned int mvolt)43*4882a593Smuzhiyun int axp_set_dcdc3(unsigned int mvolt)
44*4882a593Smuzhiyun {
45*4882a593Smuzhiyun u8 target = axp152_mvolt_to_target(mvolt, 700, 3500, 50);
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun return pmic_bus_write(AXP152_DCDC3_VOLTAGE, target);
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
axp_set_dcdc4(unsigned int mvolt)50*4882a593Smuzhiyun int axp_set_dcdc4(unsigned int mvolt)
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun u8 target = axp152_mvolt_to_target(mvolt, 700, 3500, 25);
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun return pmic_bus_write(AXP152_DCDC4_VOLTAGE, target);
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
axp_set_aldo2(unsigned int mvolt)57*4882a593Smuzhiyun int axp_set_aldo2(unsigned int mvolt)
58*4882a593Smuzhiyun {
59*4882a593Smuzhiyun u8 target = axp152_mvolt_to_target(mvolt, 700, 3500, 100);
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun return pmic_bus_write(AXP152_LDO2_VOLTAGE, target);
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
axp_init(void)64*4882a593Smuzhiyun int axp_init(void)
65*4882a593Smuzhiyun {
66*4882a593Smuzhiyun u8 ver;
67*4882a593Smuzhiyun int rc;
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun rc = pmic_bus_init();
70*4882a593Smuzhiyun if (rc)
71*4882a593Smuzhiyun return rc;
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun rc = pmic_bus_read(AXP152_CHIP_VERSION, &ver);
74*4882a593Smuzhiyun if (rc)
75*4882a593Smuzhiyun return rc;
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun if (ver != 0x05)
78*4882a593Smuzhiyun return -EINVAL;
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun return 0;
81*4882a593Smuzhiyun }
82*4882a593Smuzhiyun
do_poweroff(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])83*4882a593Smuzhiyun int do_poweroff(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
84*4882a593Smuzhiyun {
85*4882a593Smuzhiyun pmic_bus_write(AXP152_SHUTDOWN, AXP152_POWEROFF);
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun /* infinite loop during shutdown */
88*4882a593Smuzhiyun while (1) {}
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun /* not reached */
91*4882a593Smuzhiyun return 0;
92*4882a593Smuzhiyun }
93