1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2012
4 * Henrik Nordstrom <henrik@henriknordstrom.net>
5 */
6
7 #include <common.h>
8 #include <command.h>
9 #include <asm/arch/pmic_bus.h>
10 #include <axp_pmic.h>
11
axp209_mvolt_to_cfg(int mvolt,int min,int max,int div)12 static u8 axp209_mvolt_to_cfg(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 cfg, current;
26
27 if (mvolt == 0)
28 return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
29 AXP209_OUTPUT_CTRL_DCDC2);
30
31 rc = pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_DCDC2);
32 if (rc)
33 return rc;
34
35 cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25);
36
37 /* Do we really need to be this gentle? It has built-in voltage slope */
38 while ((rc = pmic_bus_read(AXP209_DCDC2_VOLTAGE, ¤t)) == 0 &&
39 current != cfg) {
40 if (current < cfg)
41 current++;
42 else
43 current--;
44
45 rc = pmic_bus_write(AXP209_DCDC2_VOLTAGE, current);
46 if (rc)
47 break;
48 }
49
50 return rc;
51 }
52
axp_set_dcdc3(unsigned int mvolt)53 int axp_set_dcdc3(unsigned int mvolt)
54 {
55 u8 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
56 int rc;
57
58 if (mvolt == 0)
59 return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
60 AXP209_OUTPUT_CTRL_DCDC3);
61
62 rc = pmic_bus_write(AXP209_DCDC3_VOLTAGE, cfg);
63 if (rc)
64 return rc;
65
66 return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_DCDC3);
67 }
68
axp_set_aldo2(unsigned int mvolt)69 int axp_set_aldo2(unsigned int mvolt)
70 {
71 int rc;
72 u8 cfg, reg;
73
74 if (mvolt == 0)
75 return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
76 AXP209_OUTPUT_CTRL_LDO2);
77
78 cfg = axp209_mvolt_to_cfg(mvolt, 1800, 3300, 100);
79
80 rc = pmic_bus_read(AXP209_LDO24_VOLTAGE, ®);
81 if (rc)
82 return rc;
83
84 /* LDO2 configuration is in upper 4 bits */
85 reg = (reg & 0x0f) | (cfg << 4);
86 rc = pmic_bus_write(AXP209_LDO24_VOLTAGE, reg);
87 if (rc)
88 return rc;
89
90 return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO2);
91 }
92
axp_set_aldo3(unsigned int mvolt)93 int axp_set_aldo3(unsigned int mvolt)
94 {
95 u8 cfg;
96 int rc;
97
98 if (mvolt == 0)
99 return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
100 AXP209_OUTPUT_CTRL_LDO3);
101
102 if (mvolt == -1)
103 cfg = 0x80; /* determined by LDO3IN pin */
104 else
105 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
106
107 rc = pmic_bus_write(AXP209_LDO3_VOLTAGE, cfg);
108 if (rc)
109 return rc;
110
111 return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO3);
112 }
113
axp_set_aldo4(unsigned int mvolt)114 int axp_set_aldo4(unsigned int mvolt)
115 {
116 int rc;
117 static const unsigned int vindex[] = {
118 1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2500,
119 2700, 2800, 3000, 3100, 3200, 3300
120 };
121 u8 cfg, reg;
122
123 if (mvolt == 0)
124 return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
125 AXP209_OUTPUT_CTRL_LDO4);
126
127 /* Translate mvolt to register cfg value, requested <= selected */
128 for (cfg = 15; vindex[cfg] > mvolt && cfg > 0; cfg--);
129
130 rc = pmic_bus_read(AXP209_LDO24_VOLTAGE, ®);
131 if (rc)
132 return rc;
133
134 /* LDO4 configuration is in lower 4 bits */
135 reg = (reg & 0xf0) | (cfg << 0);
136 rc = pmic_bus_write(AXP209_LDO24_VOLTAGE, reg);
137 if (rc)
138 return rc;
139
140 return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO4);
141 }
142
axp_init(void)143 int axp_init(void)
144 {
145 u8 ver;
146 int i, rc;
147
148 rc = pmic_bus_init();
149 if (rc)
150 return rc;
151
152 rc = pmic_bus_read(AXP209_CHIP_VERSION, &ver);
153 if (rc)
154 return rc;
155
156 /* Low 4 bits is chip version */
157 ver &= 0x0f;
158
159 if (ver != 0x1)
160 return -EINVAL;
161
162 /* Mask all interrupts */
163 for (i = AXP209_IRQ_ENABLE1; i <= AXP209_IRQ_ENABLE5; i++) {
164 rc = pmic_bus_write(i, 0);
165 if (rc)
166 return rc;
167 }
168
169 /*
170 * Turn off LDOIO regulators / tri-state GPIO pins, when rebooting
171 * from android these are sometimes on.
172 */
173 rc = pmic_bus_write(AXP_GPIO0_CTRL, AXP_GPIO_CTRL_INPUT);
174 if (rc)
175 return rc;
176
177 rc = pmic_bus_write(AXP_GPIO1_CTRL, AXP_GPIO_CTRL_INPUT);
178 if (rc)
179 return rc;
180
181 rc = pmic_bus_write(AXP_GPIO2_CTRL, AXP_GPIO_CTRL_INPUT);
182 if (rc)
183 return rc;
184
185 return 0;
186 }
187
do_poweroff(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])188 int do_poweroff(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
189 {
190 pmic_bus_write(AXP209_SHUTDOWN, AXP209_POWEROFF);
191
192 /* infinite loop during shutdown */
193 while (1) {}
194
195 /* not reached */
196 return 0;
197 }
198