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