This source file includes following definitions.
- get_ramp_delay
- s2mpa01_regulator_set_voltage_time_sel
- s2mpa01_set_ramp_delay
- s2mpa01_pmic_probe
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6 #include <linux/bug.h>
7 #include <linux/err.h>
8 #include <linux/gpio.h>
9 #include <linux/slab.h>
10 #include <linux/module.h>
11 #include <linux/of.h>
12 #include <linux/regmap.h>
13 #include <linux/platform_device.h>
14 #include <linux/regulator/driver.h>
15 #include <linux/regulator/machine.h>
16 #include <linux/regulator/of_regulator.h>
17 #include <linux/mfd/samsung/core.h>
18 #include <linux/mfd/samsung/s2mpa01.h>
19
20 struct s2mpa01_info {
21 int ramp_delay24;
22 int ramp_delay3;
23 int ramp_delay5;
24 int ramp_delay16;
25 int ramp_delay7;
26 int ramp_delay8910;
27 };
28
29 static int get_ramp_delay(int ramp_delay)
30 {
31 unsigned char cnt = 0;
32
33 ramp_delay /= 6250;
34
35 while (true) {
36 ramp_delay = ramp_delay >> 1;
37 if (ramp_delay == 0)
38 break;
39 cnt++;
40 }
41
42 if (cnt > 3)
43 cnt = 3;
44
45 return cnt;
46 }
47
48 static int s2mpa01_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
49 unsigned int old_selector,
50 unsigned int new_selector)
51 {
52 struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev);
53 unsigned int ramp_delay = 0;
54 int old_volt, new_volt;
55
56 switch (rdev_get_id(rdev)) {
57 case S2MPA01_BUCK2:
58 case S2MPA01_BUCK4:
59 ramp_delay = s2mpa01->ramp_delay24;
60 break;
61 case S2MPA01_BUCK3:
62 ramp_delay = s2mpa01->ramp_delay3;
63 break;
64 case S2MPA01_BUCK5:
65 ramp_delay = s2mpa01->ramp_delay5;
66 break;
67 case S2MPA01_BUCK1:
68 case S2MPA01_BUCK6:
69 ramp_delay = s2mpa01->ramp_delay16;
70 break;
71 case S2MPA01_BUCK7:
72 ramp_delay = s2mpa01->ramp_delay7;
73 break;
74 case S2MPA01_BUCK8:
75 case S2MPA01_BUCK9:
76 case S2MPA01_BUCK10:
77 ramp_delay = s2mpa01->ramp_delay8910;
78 break;
79 }
80
81 if (ramp_delay == 0)
82 ramp_delay = rdev->desc->ramp_delay;
83
84 old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector);
85 new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector);
86
87 return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay);
88 }
89
90 static int s2mpa01_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
91 {
92 struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev);
93 unsigned int ramp_val, ramp_shift, ramp_reg = S2MPA01_REG_RAMP2;
94 unsigned int ramp_enable = 1, enable_shift = 0;
95 int ret;
96
97 switch (rdev_get_id(rdev)) {
98 case S2MPA01_BUCK1:
99 enable_shift = S2MPA01_BUCK1_RAMP_EN_SHIFT;
100 if (!ramp_delay) {
101 ramp_enable = 0;
102 break;
103 }
104
105 if (ramp_delay > s2mpa01->ramp_delay16)
106 s2mpa01->ramp_delay16 = ramp_delay;
107 else
108 ramp_delay = s2mpa01->ramp_delay16;
109
110 ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT;
111 break;
112 case S2MPA01_BUCK2:
113 enable_shift = S2MPA01_BUCK2_RAMP_EN_SHIFT;
114 if (!ramp_delay) {
115 ramp_enable = 0;
116 break;
117 }
118
119 if (ramp_delay > s2mpa01->ramp_delay24)
120 s2mpa01->ramp_delay24 = ramp_delay;
121 else
122 ramp_delay = s2mpa01->ramp_delay24;
123
124 ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT;
125 ramp_reg = S2MPA01_REG_RAMP1;
126 break;
127 case S2MPA01_BUCK3:
128 enable_shift = S2MPA01_BUCK3_RAMP_EN_SHIFT;
129 if (!ramp_delay) {
130 ramp_enable = 0;
131 break;
132 }
133
134 s2mpa01->ramp_delay3 = ramp_delay;
135 ramp_shift = S2MPA01_BUCK3_RAMP_SHIFT;
136 ramp_reg = S2MPA01_REG_RAMP1;
137 break;
138 case S2MPA01_BUCK4:
139 enable_shift = S2MPA01_BUCK4_RAMP_EN_SHIFT;
140 if (!ramp_delay) {
141 ramp_enable = 0;
142 break;
143 }
144
145 if (ramp_delay > s2mpa01->ramp_delay24)
146 s2mpa01->ramp_delay24 = ramp_delay;
147 else
148 ramp_delay = s2mpa01->ramp_delay24;
149
150 ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT;
151 ramp_reg = S2MPA01_REG_RAMP1;
152 break;
153 case S2MPA01_BUCK5:
154 s2mpa01->ramp_delay5 = ramp_delay;
155 ramp_shift = S2MPA01_BUCK5_RAMP_SHIFT;
156 break;
157 case S2MPA01_BUCK6:
158 if (ramp_delay > s2mpa01->ramp_delay16)
159 s2mpa01->ramp_delay16 = ramp_delay;
160 else
161 ramp_delay = s2mpa01->ramp_delay16;
162
163 ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT;
164 break;
165 case S2MPA01_BUCK7:
166 s2mpa01->ramp_delay7 = ramp_delay;
167 ramp_shift = S2MPA01_BUCK7_RAMP_SHIFT;
168 break;
169 case S2MPA01_BUCK8:
170 case S2MPA01_BUCK9:
171 case S2MPA01_BUCK10:
172 if (ramp_delay > s2mpa01->ramp_delay8910)
173 s2mpa01->ramp_delay8910 = ramp_delay;
174 else
175 ramp_delay = s2mpa01->ramp_delay8910;
176
177 ramp_shift = S2MPA01_BUCK8910_RAMP_SHIFT;
178 break;
179 default:
180 return 0;
181 }
182
183 if (!ramp_enable)
184 goto ramp_disable;
185
186
187 if (rdev_get_id(rdev) >= S2MPA01_BUCK1 &&
188 rdev_get_id(rdev) <= S2MPA01_BUCK4) {
189 ret = regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1,
190 1 << enable_shift, 1 << enable_shift);
191 if (ret) {
192 dev_err(&rdev->dev, "failed to enable ramp rate\n");
193 return ret;
194 }
195 }
196
197 ramp_val = get_ramp_delay(ramp_delay);
198
199 return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift,
200 ramp_val << ramp_shift);
201
202 ramp_disable:
203 return regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1,
204 1 << enable_shift, 0);
205 }
206
207 static const struct regulator_ops s2mpa01_ldo_ops = {
208 .list_voltage = regulator_list_voltage_linear,
209 .map_voltage = regulator_map_voltage_linear,
210 .is_enabled = regulator_is_enabled_regmap,
211 .enable = regulator_enable_regmap,
212 .disable = regulator_disable_regmap,
213 .get_voltage_sel = regulator_get_voltage_sel_regmap,
214 .set_voltage_sel = regulator_set_voltage_sel_regmap,
215 .set_voltage_time_sel = regulator_set_voltage_time_sel,
216 };
217
218 static const struct regulator_ops s2mpa01_buck_ops = {
219 .list_voltage = regulator_list_voltage_linear,
220 .map_voltage = regulator_map_voltage_linear,
221 .is_enabled = regulator_is_enabled_regmap,
222 .enable = regulator_enable_regmap,
223 .disable = regulator_disable_regmap,
224 .get_voltage_sel = regulator_get_voltage_sel_regmap,
225 .set_voltage_sel = regulator_set_voltage_sel_regmap,
226 .set_voltage_time_sel = s2mpa01_regulator_set_voltage_time_sel,
227 .set_ramp_delay = s2mpa01_set_ramp_delay,
228 };
229
230 #define regulator_desc_ldo(num, step) { \
231 .name = "LDO"#num, \
232 .of_match = of_match_ptr("LDO"#num), \
233 .regulators_node = of_match_ptr("regulators"), \
234 .id = S2MPA01_LDO##num, \
235 .ops = &s2mpa01_ldo_ops, \
236 .type = REGULATOR_VOLTAGE, \
237 .owner = THIS_MODULE, \
238 .min_uV = MIN_800_MV, \
239 .uV_step = step, \
240 .n_voltages = S2MPA01_LDO_N_VOLTAGES, \
241 .vsel_reg = S2MPA01_REG_L1CTRL + num - 1, \
242 .vsel_mask = S2MPA01_LDO_VSEL_MASK, \
243 .enable_reg = S2MPA01_REG_L1CTRL + num - 1, \
244 .enable_mask = S2MPA01_ENABLE_MASK \
245 }
246
247 #define regulator_desc_buck1_4(num) { \
248 .name = "BUCK"#num, \
249 .of_match = of_match_ptr("BUCK"#num), \
250 .regulators_node = of_match_ptr("regulators"), \
251 .id = S2MPA01_BUCK##num, \
252 .ops = &s2mpa01_buck_ops, \
253 .type = REGULATOR_VOLTAGE, \
254 .owner = THIS_MODULE, \
255 .min_uV = MIN_600_MV, \
256 .uV_step = STEP_6_25_MV, \
257 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
258 .ramp_delay = S2MPA01_RAMP_DELAY, \
259 .vsel_reg = S2MPA01_REG_B1CTRL2 + (num - 1) * 2, \
260 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
261 .enable_reg = S2MPA01_REG_B1CTRL1 + (num - 1) * 2, \
262 .enable_mask = S2MPA01_ENABLE_MASK \
263 }
264
265 #define regulator_desc_buck5 { \
266 .name = "BUCK5", \
267 .of_match = of_match_ptr("BUCK5"), \
268 .regulators_node = of_match_ptr("regulators"), \
269 .id = S2MPA01_BUCK5, \
270 .ops = &s2mpa01_buck_ops, \
271 .type = REGULATOR_VOLTAGE, \
272 .owner = THIS_MODULE, \
273 .min_uV = MIN_800_MV, \
274 .uV_step = STEP_6_25_MV, \
275 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
276 .ramp_delay = S2MPA01_RAMP_DELAY, \
277 .vsel_reg = S2MPA01_REG_B5CTRL2, \
278 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
279 .enable_reg = S2MPA01_REG_B5CTRL1, \
280 .enable_mask = S2MPA01_ENABLE_MASK \
281 }
282
283 #define regulator_desc_buck6_10(num, min, step) { \
284 .name = "BUCK"#num, \
285 .of_match = of_match_ptr("BUCK"#num), \
286 .regulators_node = of_match_ptr("regulators"), \
287 .id = S2MPA01_BUCK##num, \
288 .ops = &s2mpa01_buck_ops, \
289 .type = REGULATOR_VOLTAGE, \
290 .owner = THIS_MODULE, \
291 .min_uV = min, \
292 .uV_step = step, \
293 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
294 .ramp_delay = S2MPA01_RAMP_DELAY, \
295 .vsel_reg = S2MPA01_REG_B6CTRL2 + (num - 6) * 2, \
296 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
297 .enable_reg = S2MPA01_REG_B6CTRL1 + (num - 6) * 2, \
298 .enable_mask = S2MPA01_ENABLE_MASK \
299 }
300
301 static const struct regulator_desc regulators[] = {
302 regulator_desc_ldo(1, STEP_25_MV),
303 regulator_desc_ldo(2, STEP_50_MV),
304 regulator_desc_ldo(3, STEP_50_MV),
305 regulator_desc_ldo(4, STEP_50_MV),
306 regulator_desc_ldo(5, STEP_25_MV),
307 regulator_desc_ldo(6, STEP_25_MV),
308 regulator_desc_ldo(7, STEP_50_MV),
309 regulator_desc_ldo(8, STEP_50_MV),
310 regulator_desc_ldo(9, STEP_50_MV),
311 regulator_desc_ldo(10, STEP_50_MV),
312 regulator_desc_ldo(11, STEP_50_MV),
313 regulator_desc_ldo(12, STEP_50_MV),
314 regulator_desc_ldo(13, STEP_50_MV),
315 regulator_desc_ldo(14, STEP_50_MV),
316 regulator_desc_ldo(15, STEP_50_MV),
317 regulator_desc_ldo(16, STEP_50_MV),
318 regulator_desc_ldo(17, STEP_50_MV),
319 regulator_desc_ldo(18, STEP_50_MV),
320 regulator_desc_ldo(19, STEP_50_MV),
321 regulator_desc_ldo(20, STEP_50_MV),
322 regulator_desc_ldo(21, STEP_50_MV),
323 regulator_desc_ldo(22, STEP_50_MV),
324 regulator_desc_ldo(23, STEP_50_MV),
325 regulator_desc_ldo(24, STEP_50_MV),
326 regulator_desc_ldo(25, STEP_50_MV),
327 regulator_desc_ldo(26, STEP_25_MV),
328 regulator_desc_buck1_4(1),
329 regulator_desc_buck1_4(2),
330 regulator_desc_buck1_4(3),
331 regulator_desc_buck1_4(4),
332 regulator_desc_buck5,
333 regulator_desc_buck6_10(6, MIN_600_MV, STEP_6_25_MV),
334 regulator_desc_buck6_10(7, MIN_600_MV, STEP_6_25_MV),
335 regulator_desc_buck6_10(8, MIN_800_MV, STEP_12_5_MV),
336 regulator_desc_buck6_10(9, MIN_1500_MV, STEP_12_5_MV),
337 regulator_desc_buck6_10(10, MIN_1000_MV, STEP_12_5_MV),
338 };
339
340 static int s2mpa01_pmic_probe(struct platform_device *pdev)
341 {
342 struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
343 struct sec_platform_data *pdata = dev_get_platdata(iodev->dev);
344 struct regulator_config config = { };
345 struct s2mpa01_info *s2mpa01;
346 int i;
347
348 s2mpa01 = devm_kzalloc(&pdev->dev, sizeof(*s2mpa01), GFP_KERNEL);
349 if (!s2mpa01)
350 return -ENOMEM;
351
352 config.dev = iodev->dev;
353 config.regmap = iodev->regmap_pmic;
354 config.driver_data = s2mpa01;
355
356 for (i = 0; i < S2MPA01_REGULATOR_MAX; i++) {
357 struct regulator_dev *rdev;
358
359 if (pdata)
360 config.init_data = pdata->regulators[i].initdata;
361
362 rdev = devm_regulator_register(&pdev->dev,
363 ®ulators[i], &config);
364 if (IS_ERR(rdev)) {
365 dev_err(&pdev->dev, "regulator init failed for %d\n",
366 i);
367 return PTR_ERR(rdev);
368 }
369 }
370
371 return 0;
372 }
373
374 static const struct platform_device_id s2mpa01_pmic_id[] = {
375 { "s2mpa01-pmic", 0},
376 { },
377 };
378 MODULE_DEVICE_TABLE(platform, s2mpa01_pmic_id);
379
380 static struct platform_driver s2mpa01_pmic_driver = {
381 .driver = {
382 .name = "s2mpa01-pmic",
383 },
384 .probe = s2mpa01_pmic_probe,
385 .id_table = s2mpa01_pmic_id,
386 };
387
388 module_platform_driver(s2mpa01_pmic_driver);
389
390
391 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
392 MODULE_AUTHOR("Sachin Kamat <sachin.kamat@samsung.com>");
393 MODULE_DESCRIPTION("SAMSUNG S2MPA01 Regulator Driver");
394 MODULE_LICENSE("GPL");