1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * AXP818 driver based on AXP221 driver
4  *
5  *
6  * (C) Copyright 2015 Vishnu Patekar <vishnuptekar0510@gmail.com>
7  *
8  * Based on axp221.c
9  * (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com>
10  * (C) Copyright 2013 Oliver Schinagl <oliver@schinagl.nl>
11  */
12 
13 #include <common.h>
14 #include <command.h>
15 #include <errno.h>
16 #include <asm/arch/gpio.h>
17 #include <asm/arch/pmic_bus.h>
18 #include <axp_pmic.h>
19 
axp818_mvolt_to_cfg(int mvolt,int min,int max,int div)20 static u8 axp818_mvolt_to_cfg(int mvolt, int min, int max, int div)
21 {
22 	if (mvolt < min)
23 		mvolt = min;
24 	else if (mvolt > max)
25 		mvolt = max;
26 
27 	return  (mvolt - min) / div;
28 }
29 
axp_set_dcdc1(unsigned int mvolt)30 int axp_set_dcdc1(unsigned int mvolt)
31 {
32 	int ret;
33 	u8 cfg = axp818_mvolt_to_cfg(mvolt, 1600, 3400, 100);
34 
35 	if (mvolt == 0)
36 		return pmic_bus_clrbits(AXP818_OUTPUT_CTRL1,
37 					AXP818_OUTPUT_CTRL1_DCDC1_EN);
38 
39 	ret = pmic_bus_write(AXP818_DCDC1_CTRL, cfg);
40 	if (ret)
41 		return ret;
42 
43 	return pmic_bus_setbits(AXP818_OUTPUT_CTRL1,
44 				AXP818_OUTPUT_CTRL1_DCDC1_EN);
45 }
46 
axp_set_dcdc2(unsigned int mvolt)47 int axp_set_dcdc2(unsigned int mvolt)
48 {
49 	int ret;
50 	u8 cfg;
51 
52 	if (mvolt >= 1220)
53 		cfg = 70 + axp818_mvolt_to_cfg(mvolt, 1220, 1300, 20);
54 	else
55 		cfg = axp818_mvolt_to_cfg(mvolt, 500, 1200, 10);
56 
57 	if (mvolt == 0)
58 		return pmic_bus_clrbits(AXP818_OUTPUT_CTRL1,
59 					AXP818_OUTPUT_CTRL1_DCDC2_EN);
60 
61 	ret = pmic_bus_write(AXP818_DCDC2_CTRL, cfg);
62 	if (ret)
63 		return ret;
64 
65 	return pmic_bus_setbits(AXP818_OUTPUT_CTRL1,
66 				AXP818_OUTPUT_CTRL1_DCDC2_EN);
67 }
68 
axp_set_dcdc3(unsigned int mvolt)69 int axp_set_dcdc3(unsigned int mvolt)
70 {
71 	int ret;
72 	u8 cfg;
73 
74 	if (mvolt >= 1220)
75 		cfg = 70 + axp818_mvolt_to_cfg(mvolt, 1220, 1300, 20);
76 	else
77 		cfg = axp818_mvolt_to_cfg(mvolt, 500, 1200, 10);
78 
79 	if (mvolt == 0)
80 		return pmic_bus_clrbits(AXP818_OUTPUT_CTRL1,
81 					AXP818_OUTPUT_CTRL1_DCDC3_EN);
82 
83 	ret = pmic_bus_write(AXP818_DCDC3_CTRL, cfg);
84 	if (ret)
85 		return ret;
86 
87 	return pmic_bus_setbits(AXP818_OUTPUT_CTRL1,
88 				AXP818_OUTPUT_CTRL1_DCDC3_EN);
89 }
90 
axp_set_dcdc5(unsigned int mvolt)91 int axp_set_dcdc5(unsigned int mvolt)
92 {
93 	int ret;
94 	u8 cfg;
95 
96 	if (mvolt >= 1140)
97 		cfg = 32 + axp818_mvolt_to_cfg(mvolt, 1140, 1840, 20);
98 	else
99 		cfg = axp818_mvolt_to_cfg(mvolt, 800, 1120, 10);
100 
101 	if (mvolt == 0)
102 		return pmic_bus_clrbits(AXP818_OUTPUT_CTRL1,
103 					AXP818_OUTPUT_CTRL1_DCDC5_EN);
104 
105 	ret = pmic_bus_write(AXP818_DCDC5_CTRL, cfg);
106 	if (ret)
107 		return ret;
108 
109 	return pmic_bus_setbits(AXP818_OUTPUT_CTRL1,
110 				AXP818_OUTPUT_CTRL1_DCDC5_EN);
111 }
112 
axp_set_aldo(int aldo_num,unsigned int mvolt)113 int axp_set_aldo(int aldo_num, unsigned int mvolt)
114 {
115 	int ret;
116 	u8 cfg;
117 
118 	if (aldo_num < 1 || aldo_num > 3)
119 		return -EINVAL;
120 
121 	if (mvolt == 0)
122 		return pmic_bus_clrbits(AXP818_OUTPUT_CTRL3,
123 				AXP818_OUTPUT_CTRL3_ALDO1_EN << (aldo_num - 1));
124 
125 	cfg = axp818_mvolt_to_cfg(mvolt, 700, 3300, 100);
126 	ret = pmic_bus_write(AXP818_ALDO1_CTRL + (aldo_num - 1), cfg);
127 	if (ret)
128 		return ret;
129 
130 	return pmic_bus_setbits(AXP818_OUTPUT_CTRL3,
131 				AXP818_OUTPUT_CTRL3_ALDO1_EN << (aldo_num - 1));
132 }
133 
134 /* TODO: re-work other AXP drivers to consolidate ALDO functions. */
axp_set_aldo1(unsigned int mvolt)135 int axp_set_aldo1(unsigned int mvolt)
136 {
137 	return axp_set_aldo(1, mvolt);
138 }
139 
axp_set_aldo2(unsigned int mvolt)140 int axp_set_aldo2(unsigned int mvolt)
141 {
142 	return axp_set_aldo(2, mvolt);
143 }
144 
axp_set_aldo3(unsigned int mvolt)145 int axp_set_aldo3(unsigned int mvolt)
146 {
147 	return axp_set_aldo(3, mvolt);
148 }
149 
axp_set_dldo(int dldo_num,unsigned int mvolt)150 int axp_set_dldo(int dldo_num, unsigned int mvolt)
151 {
152 	int ret;
153 	u8 cfg;
154 
155 	if (dldo_num < 1 || dldo_num > 4)
156 		return -EINVAL;
157 
158 	if (mvolt == 0)
159 		return pmic_bus_clrbits(AXP818_OUTPUT_CTRL2,
160 				AXP818_OUTPUT_CTRL2_DLDO1_EN << (dldo_num - 1));
161 
162 	cfg = axp818_mvolt_to_cfg(mvolt, 700, 3300, 100);
163 	if (dldo_num == 2 && mvolt > 3300)
164 		cfg += 1 + axp818_mvolt_to_cfg(mvolt, 3400, 4200, 200);
165 	ret = pmic_bus_write(AXP818_DLDO1_CTRL + (dldo_num - 1), cfg);
166 	if (ret)
167 		return ret;
168 
169 	return pmic_bus_setbits(AXP818_OUTPUT_CTRL2,
170 				AXP818_OUTPUT_CTRL2_DLDO1_EN << (dldo_num - 1));
171 }
172 
axp_set_eldo(int eldo_num,unsigned int mvolt)173 int axp_set_eldo(int eldo_num, unsigned int mvolt)
174 {
175 	int ret;
176 	u8 cfg;
177 
178 	if (eldo_num < 1 || eldo_num > 3)
179 		return -EINVAL;
180 
181 	if (mvolt == 0)
182 		return pmic_bus_clrbits(AXP818_OUTPUT_CTRL2,
183 				AXP818_OUTPUT_CTRL2_ELDO1_EN << (eldo_num - 1));
184 
185 	cfg = axp818_mvolt_to_cfg(mvolt, 700, 1900, 50);
186 	ret = pmic_bus_write(AXP818_ELDO1_CTRL + (eldo_num - 1), cfg);
187 	if (ret)
188 		return ret;
189 
190 	return pmic_bus_setbits(AXP818_OUTPUT_CTRL2,
191 				AXP818_OUTPUT_CTRL2_ELDO1_EN << (eldo_num - 1));
192 }
193 
axp_set_fldo(int fldo_num,unsigned int mvolt)194 int axp_set_fldo(int fldo_num, unsigned int mvolt)
195 {
196 	int ret;
197 	u8 cfg;
198 
199 	if (fldo_num < 1 || fldo_num > 3)
200 		return -EINVAL;
201 
202 	if (mvolt == 0)
203 		return pmic_bus_clrbits(AXP818_OUTPUT_CTRL3,
204 				AXP818_OUTPUT_CTRL3_FLDO1_EN << (fldo_num - 1));
205 
206 	if (fldo_num < 3) {
207 		cfg = axp818_mvolt_to_cfg(mvolt, 700, 1450, 50);
208 		ret = pmic_bus_write(AXP818_FLDO1_CTRL + (fldo_num - 1), cfg);
209 	} else {
210 		/*
211 		 * Special case for FLDO3, which is DCDC5 / 2 or FLDOIN / 2
212 		 * Since FLDOIN is unknown, test against DCDC5.
213 		 */
214 		if (mvolt * 2 == CONFIG_AXP_DCDC5_VOLT)
215 			ret = pmic_bus_clrbits(AXP818_FLDO2_3_CTRL,
216 					       AXP818_FLDO2_3_CTRL_FLDO3_VOL);
217 		else
218 			ret = pmic_bus_setbits(AXP818_FLDO2_3_CTRL,
219 					       AXP818_FLDO2_3_CTRL_FLDO3_VOL);
220 	}
221 	if (ret)
222 		return ret;
223 
224 	return pmic_bus_setbits(AXP818_OUTPUT_CTRL3,
225 				AXP818_OUTPUT_CTRL3_FLDO1_EN << (fldo_num - 1));
226 }
227 
axp_set_sw(bool on)228 int axp_set_sw(bool on)
229 {
230 	if (on)
231 		return pmic_bus_setbits(AXP818_OUTPUT_CTRL2,
232 					AXP818_OUTPUT_CTRL2_SW_EN);
233 
234 	return pmic_bus_clrbits(AXP818_OUTPUT_CTRL2,
235 				AXP818_OUTPUT_CTRL2_SW_EN);
236 }
237 
axp_init(void)238 int axp_init(void)
239 {
240 	u8 axp_chip_id;
241 	int ret;
242 
243 	ret = pmic_bus_init();
244 	if (ret)
245 		return ret;
246 
247 	ret = pmic_bus_read(AXP818_CHIP_ID, &axp_chip_id);
248 	if (ret)
249 		return ret;
250 
251 	if (!(axp_chip_id == 0x51))
252 		return -ENODEV;
253 	else
254 		return ret;
255 
256 	return 0;
257 }
258 
do_poweroff(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])259 int do_poweroff(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
260 {
261 	pmic_bus_write(AXP818_SHUTDOWN, AXP818_SHUTDOWN_POWEROFF);
262 
263 	/* infinite loop during shutdown */
264 	while (1) {}
265 
266 	/* not reached */
267 	return 0;
268 }
269