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14bc66bd HN |
1 | /* |
2 | * (C) Copyright 2012 | |
3 | * Henrik Nordstrom <henrik@henriknordstrom.net> | |
4 | * | |
5 | * SPDX-License-Identifier: GPL-2.0+ | |
6 | */ | |
7 | ||
8 | #include <common.h> | |
467e92b3 | 9 | #include <command.h> |
30490b52 | 10 | #include <asm/arch/pmic_bus.h> |
6944aff1 | 11 | #include <axp_pmic.h> |
14bc66bd | 12 | |
14bc66bd HN |
13 | static u8 axp209_mvolt_to_cfg(int mvolt, int min, int max, int div) |
14 | { | |
15 | if (mvolt < min) | |
16 | mvolt = min; | |
17 | else if (mvolt > max) | |
18 | mvolt = max; | |
19 | ||
20 | return (mvolt - min) / div; | |
21 | } | |
22 | ||
6944aff1 | 23 | int axp_set_dcdc2(unsigned int mvolt) |
14bc66bd HN |
24 | { |
25 | int rc; | |
26 | u8 cfg, current; | |
27 | ||
beba401f HG |
28 | if (mvolt == 0) |
29 | return pmic_bus_clrbits(AXP209_OUTPUT_CTRL, | |
30 | AXP209_OUTPUT_CTRL_DCDC2); | |
31 | ||
32 | rc = pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_DCDC2); | |
33 | if (rc) | |
34 | return rc; | |
35 | ||
14bc66bd HN |
36 | cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25); |
37 | ||
38 | /* Do we really need to be this gentle? It has built-in voltage slope */ | |
30490b52 | 39 | while ((rc = pmic_bus_read(AXP209_DCDC2_VOLTAGE, ¤t)) == 0 && |
14bc66bd HN |
40 | current != cfg) { |
41 | if (current < cfg) | |
42 | current++; | |
43 | else | |
44 | current--; | |
45 | ||
30490b52 | 46 | rc = pmic_bus_write(AXP209_DCDC2_VOLTAGE, current); |
14bc66bd HN |
47 | if (rc) |
48 | break; | |
49 | } | |
50 | ||
51 | return rc; | |
52 | } | |
53 | ||
6944aff1 | 54 | int axp_set_dcdc3(unsigned int mvolt) |
14bc66bd HN |
55 | { |
56 | u8 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25); | |
beba401f HG |
57 | int rc; |
58 | ||
59 | if (mvolt == 0) | |
60 | return pmic_bus_clrbits(AXP209_OUTPUT_CTRL, | |
61 | AXP209_OUTPUT_CTRL_DCDC3); | |
14bc66bd | 62 | |
beba401f HG |
63 | rc = pmic_bus_write(AXP209_DCDC3_VOLTAGE, cfg); |
64 | if (rc) | |
65 | return rc; | |
66 | ||
67 | return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_DCDC3); | |
14bc66bd HN |
68 | } |
69 | ||
6944aff1 | 70 | int axp_set_aldo2(unsigned int mvolt) |
14bc66bd HN |
71 | { |
72 | int rc; | |
73 | u8 cfg, reg; | |
74 | ||
beba401f HG |
75 | if (mvolt == 0) |
76 | return pmic_bus_clrbits(AXP209_OUTPUT_CTRL, | |
77 | AXP209_OUTPUT_CTRL_LDO2); | |
78 | ||
14bc66bd HN |
79 | cfg = axp209_mvolt_to_cfg(mvolt, 1800, 3300, 100); |
80 | ||
30490b52 | 81 | rc = pmic_bus_read(AXP209_LDO24_VOLTAGE, ®); |
14bc66bd HN |
82 | if (rc) |
83 | return rc; | |
84 | ||
85 | /* LDO2 configuration is in upper 4 bits */ | |
86 | reg = (reg & 0x0f) | (cfg << 4); | |
beba401f HG |
87 | rc = pmic_bus_write(AXP209_LDO24_VOLTAGE, reg); |
88 | if (rc) | |
89 | return rc; | |
90 | ||
91 | return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO2); | |
14bc66bd HN |
92 | } |
93 | ||
6944aff1 | 94 | int axp_set_aldo3(unsigned int mvolt) |
14bc66bd HN |
95 | { |
96 | u8 cfg; | |
beba401f HG |
97 | int rc; |
98 | ||
99 | if (mvolt == 0) | |
100 | return pmic_bus_clrbits(AXP209_OUTPUT_CTRL, | |
101 | AXP209_OUTPUT_CTRL_LDO3); | |
14bc66bd HN |
102 | |
103 | if (mvolt == -1) | |
104 | cfg = 0x80; /* determined by LDO3IN pin */ | |
105 | else | |
99deda1d | 106 | cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25); |
14bc66bd | 107 | |
beba401f HG |
108 | rc = pmic_bus_write(AXP209_LDO3_VOLTAGE, cfg); |
109 | if (rc) | |
110 | return rc; | |
111 | ||
112 | return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO3); | |
14bc66bd HN |
113 | } |
114 | ||
6944aff1 | 115 | int axp_set_aldo4(unsigned int mvolt) |
14bc66bd HN |
116 | { |
117 | int rc; | |
6944aff1 | 118 | static const unsigned int vindex[] = { |
14bc66bd HN |
119 | 1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2500, |
120 | 2700, 2800, 3000, 3100, 3200, 3300 | |
121 | }; | |
122 | u8 cfg, reg; | |
123 | ||
beba401f HG |
124 | if (mvolt == 0) |
125 | return pmic_bus_clrbits(AXP209_OUTPUT_CTRL, | |
126 | AXP209_OUTPUT_CTRL_LDO4); | |
127 | ||
14bc66bd HN |
128 | /* Translate mvolt to register cfg value, requested <= selected */ |
129 | for (cfg = 15; vindex[cfg] > mvolt && cfg > 0; cfg--); | |
130 | ||
30490b52 | 131 | rc = pmic_bus_read(AXP209_LDO24_VOLTAGE, ®); |
14bc66bd HN |
132 | if (rc) |
133 | return rc; | |
134 | ||
135 | /* LDO4 configuration is in lower 4 bits */ | |
136 | reg = (reg & 0xf0) | (cfg << 0); | |
beba401f HG |
137 | rc = pmic_bus_write(AXP209_LDO24_VOLTAGE, reg); |
138 | if (rc) | |
139 | return rc; | |
140 | ||
141 | return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO4); | |
14bc66bd HN |
142 | } |
143 | ||
6944aff1 | 144 | int axp_init(void) |
14bc66bd HN |
145 | { |
146 | u8 ver; | |
9dcf68fa | 147 | int i, rc; |
14bc66bd | 148 | |
30490b52 HG |
149 | rc = pmic_bus_init(); |
150 | if (rc) | |
151 | return rc; | |
152 | ||
153 | rc = pmic_bus_read(AXP209_CHIP_VERSION, &ver); | |
14bc66bd HN |
154 | if (rc) |
155 | return rc; | |
156 | ||
157 | /* Low 4 bits is chip version */ | |
158 | ver &= 0x0f; | |
159 | ||
160 | if (ver != 0x1) | |
161 | return -1; | |
162 | ||
9dcf68fa HG |
163 | /* Mask all interrupts */ |
164 | for (i = AXP209_IRQ_ENABLE1; i <= AXP209_IRQ_ENABLE5; i++) { | |
30490b52 | 165 | rc = pmic_bus_write(i, 0); |
9dcf68fa HG |
166 | if (rc) |
167 | return rc; | |
168 | } | |
169 | ||
14bc66bd HN |
170 | return 0; |
171 | } | |
467e92b3 MS |
172 | |
173 | int do_poweroff(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) | |
174 | { | |
175 | pmic_bus_write(AXP209_SHUTDOWN, AXP209_POWEROFF); | |
176 | ||
177 | /* infinite loop during shutdown */ | |
178 | while (1) {} | |
179 | ||
180 | /* not reached */ | |
181 | return 0; | |
182 | } |