2 * Copyright 2016 Michal Meloun <mmel@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
36 #include <sys/malloc.h>
40 #include <machine/bus.h>
42 #include <dev/extres/regulator/regulator.h>
43 #include <dev/gpio/gpiobusvar.h>
45 #include <gnu/dts/include/dt-bindings/mfd/as3722.h>
49 MALLOC_DEFINE(M_AS3722_REG, "AS3722 regulator", "AS3722 power regulator");
51 #define DIV_ROUND_UP(n,d) howmany(n, d)
75 /* Regulator HW definition. */
78 char *name; /* Regulator name */
79 char *supply_name; /* Source property name */
81 uint8_t volt_vsel_mask;
84 uint8_t ext_enable_reg;
85 uint8_t ext_enable_mask;
86 struct regulator_range *ranges;
90 struct as3722_reg_sc {
91 struct regnode *regnode;
92 struct as3722_softc *base_sc;
96 struct regnode_std_param *param;
103 static struct regulator_range as3722_sd016_ranges[] = {
104 REG_RANGE_INIT(0x00, 0x00, 0, 0),
105 REG_RANGE_INIT(0x01, 0x5A, 610000, 10000),
108 static struct regulator_range as3722_sd0_lv_ranges[] = {
109 REG_RANGE_INIT(0x00, 0x00, 0, 0),
110 REG_RANGE_INIT(0x01, 0x6E, 410000, 10000),
113 static struct regulator_range as3722_sd_ranges[] = {
114 REG_RANGE_INIT(0x00, 0x00, 0, 0),
115 REG_RANGE_INIT(0x01, 0x40, 612500, 12500),
116 REG_RANGE_INIT(0x41, 0x70, 1425000, 25000),
117 REG_RANGE_INIT(0x71, 0x7F, 2650000, 50000),
120 static struct regulator_range as3722_ldo3_ranges[] = {
121 REG_RANGE_INIT(0x00, 0x00, 0, 0),
122 REG_RANGE_INIT(0x01, 0x2D, 620000, 20000),
125 static struct regulator_range as3722_ldo_ranges[] = {
126 REG_RANGE_INIT(0x00, 0x00, 0, 0),
127 REG_RANGE_INIT(0x01, 0x24, 825000, 25000),
128 REG_RANGE_INIT(0x40, 0x7F, 1725000, 25000),
131 static struct reg_def as3722s_def[] = {
133 .id = AS3722_REG_ID_SD0,
135 .volt_reg = AS3722_SD0_VOLTAGE,
136 .volt_vsel_mask = AS3722_SD_VSEL_MASK,
137 .enable_reg = AS3722_SD_CONTROL,
138 .enable_mask = AS3722_SDN_CTRL(0),
139 .ext_enable_reg = AS3722_ENABLE_CTRL1,
140 .ext_enable_mask = AS3722_SD0_EXT_ENABLE_MASK,
141 .ranges = as3722_sd016_ranges,
142 .nranges = nitems(as3722_sd016_ranges),
145 .id = AS3722_REG_ID_SD1,
147 .volt_reg = AS3722_SD1_VOLTAGE,
148 .volt_vsel_mask = AS3722_SD_VSEL_MASK,
149 .enable_reg = AS3722_SD_CONTROL,
150 .enable_mask = AS3722_SDN_CTRL(1),
151 .ext_enable_reg = AS3722_ENABLE_CTRL1,
152 .ext_enable_mask = AS3722_SD1_EXT_ENABLE_MASK,
153 .ranges = as3722_sd_ranges,
154 .nranges = nitems(as3722_sd_ranges),
157 .id = AS3722_REG_ID_SD2,
159 .supply_name = "vsup-sd2",
160 .volt_reg = AS3722_SD2_VOLTAGE,
161 .volt_vsel_mask = AS3722_SD_VSEL_MASK,
162 .enable_reg = AS3722_SD_CONTROL,
163 .enable_mask = AS3722_SDN_CTRL(2),
164 .ext_enable_reg = AS3722_ENABLE_CTRL1,
165 .ext_enable_mask = AS3722_SD2_EXT_ENABLE_MASK,
166 .ranges = as3722_sd_ranges,
167 .nranges = nitems(as3722_sd_ranges),
170 .id = AS3722_REG_ID_SD3,
172 .supply_name = "vsup-sd3",
173 .volt_reg = AS3722_SD3_VOLTAGE,
174 .volt_vsel_mask = AS3722_SD_VSEL_MASK,
175 .enable_reg = AS3722_SD_CONTROL,
176 .enable_mask = AS3722_SDN_CTRL(3),
177 .ext_enable_reg = AS3722_ENABLE_CTRL1,
178 .ext_enable_mask = AS3722_SD3_EXT_ENABLE_MASK,
179 .ranges = as3722_sd_ranges,
180 .nranges = nitems(as3722_sd_ranges),
183 .id = AS3722_REG_ID_SD4,
185 .supply_name = "vsup-sd4",
186 .volt_reg = AS3722_SD4_VOLTAGE,
187 .volt_vsel_mask = AS3722_SD_VSEL_MASK,
188 .enable_reg = AS3722_SD_CONTROL,
189 .enable_mask = AS3722_SDN_CTRL(4),
190 .ext_enable_reg = AS3722_ENABLE_CTRL2,
191 .ext_enable_mask = AS3722_SD4_EXT_ENABLE_MASK,
192 .ranges = as3722_sd_ranges,
193 .nranges = nitems(as3722_sd_ranges),
196 .id = AS3722_REG_ID_SD5,
198 .supply_name = "vsup-sd5",
199 .volt_reg = AS3722_SD5_VOLTAGE,
200 .volt_vsel_mask = AS3722_SD_VSEL_MASK,
201 .enable_reg = AS3722_SD_CONTROL,
202 .enable_mask = AS3722_SDN_CTRL(5),
203 .ext_enable_reg = AS3722_ENABLE_CTRL2,
204 .ext_enable_mask = AS3722_SD5_EXT_ENABLE_MASK,
205 .ranges = as3722_sd_ranges,
206 .nranges = nitems(as3722_sd_ranges),
209 .id = AS3722_REG_ID_SD6,
211 .volt_reg = AS3722_SD6_VOLTAGE,
212 .volt_vsel_mask = AS3722_SD_VSEL_MASK,
213 .enable_reg = AS3722_SD_CONTROL,
214 .enable_mask = AS3722_SDN_CTRL(6),
215 .ext_enable_reg = AS3722_ENABLE_CTRL2,
216 .ext_enable_mask = AS3722_SD6_EXT_ENABLE_MASK,
217 .ranges = as3722_sd016_ranges,
218 .nranges = nitems(as3722_sd016_ranges),
221 .id = AS3722_REG_ID_LDO0,
223 .supply_name = "vin-ldo0",
224 .volt_reg = AS3722_LDO0_VOLTAGE,
225 .volt_vsel_mask = AS3722_LDO0_VSEL_MASK,
226 .enable_reg = AS3722_LDO_CONTROL0,
227 .enable_mask = AS3722_LDO0_CTRL,
228 .ext_enable_reg = AS3722_ENABLE_CTRL3,
229 .ext_enable_mask = AS3722_LDO0_EXT_ENABLE_MASK,
230 .ranges = as3722_ldo_ranges,
231 .nranges = nitems(as3722_ldo_ranges),
234 .id = AS3722_REG_ID_LDO1,
236 .supply_name = "vin-ldo1-6",
237 .volt_reg = AS3722_LDO1_VOLTAGE,
238 .volt_vsel_mask = AS3722_LDO_VSEL_MASK,
239 .enable_reg = AS3722_LDO_CONTROL0,
240 .enable_mask = AS3722_LDO1_CTRL,
241 .ext_enable_reg = AS3722_ENABLE_CTRL3,
242 .ext_enable_mask = AS3722_LDO1_EXT_ENABLE_MASK,
243 .ranges = as3722_ldo_ranges,
244 .nranges = nitems(as3722_ldo_ranges),
247 .id = AS3722_REG_ID_LDO2,
249 .supply_name = "vin-ldo2-5-7",
250 .volt_reg = AS3722_LDO2_VOLTAGE,
251 .volt_vsel_mask = AS3722_LDO_VSEL_MASK,
252 .enable_reg = AS3722_LDO_CONTROL0,
253 .enable_mask = AS3722_LDO2_CTRL,
254 .ext_enable_reg = AS3722_ENABLE_CTRL3,
255 .ext_enable_mask = AS3722_LDO2_EXT_ENABLE_MASK,
256 .ranges = as3722_ldo_ranges,
257 .nranges = nitems(as3722_ldo_ranges),
260 .id = AS3722_REG_ID_LDO3,
262 .supply_name = "vin-ldo3-4",
263 .volt_reg = AS3722_LDO3_VOLTAGE,
264 .volt_vsel_mask = AS3722_LDO3_VSEL_MASK,
265 .enable_reg = AS3722_LDO_CONTROL0,
266 .enable_mask = AS3722_LDO3_CTRL,
267 .ext_enable_reg = AS3722_ENABLE_CTRL3,
268 .ext_enable_mask = AS3722_LDO3_EXT_ENABLE_MASK,
269 .ranges = as3722_ldo3_ranges,
270 .nranges = nitems(as3722_ldo3_ranges),
273 .id = AS3722_REG_ID_LDO4,
275 .supply_name = "vin-ldo3-4",
276 .volt_reg = AS3722_LDO4_VOLTAGE,
277 .volt_vsel_mask = AS3722_LDO_VSEL_MASK,
278 .enable_reg = AS3722_LDO_CONTROL0,
279 .enable_mask = AS3722_LDO4_CTRL,
280 .ext_enable_reg = AS3722_ENABLE_CTRL4,
281 .ext_enable_mask = AS3722_LDO4_EXT_ENABLE_MASK,
282 .ranges = as3722_ldo_ranges,
283 .nranges = nitems(as3722_ldo_ranges),
286 .id = AS3722_REG_ID_LDO5,
288 .supply_name = "vin-ldo2-5-7",
289 .volt_reg = AS3722_LDO5_VOLTAGE,
290 .volt_vsel_mask = AS3722_LDO_VSEL_MASK,
291 .enable_reg = AS3722_LDO_CONTROL0,
292 .enable_mask = AS3722_LDO5_CTRL,
293 .ext_enable_reg = AS3722_ENABLE_CTRL4,
294 .ext_enable_mask = AS3722_LDO5_EXT_ENABLE_MASK,
295 .ranges = as3722_ldo_ranges,
296 .nranges = nitems(as3722_ldo_ranges),
299 .id = AS3722_REG_ID_LDO6,
301 .supply_name = "vin-ldo1-6",
302 .volt_reg = AS3722_LDO6_VOLTAGE,
303 .volt_vsel_mask = AS3722_LDO_VSEL_MASK,
304 .enable_reg = AS3722_LDO_CONTROL0,
305 .enable_mask = AS3722_LDO6_CTRL,
306 .ext_enable_reg = AS3722_ENABLE_CTRL4,
307 .ext_enable_mask = AS3722_LDO6_EXT_ENABLE_MASK,
308 .ranges = as3722_ldo_ranges,
309 .nranges = nitems(as3722_ldo_ranges),
312 .id = AS3722_REG_ID_LDO7,
314 .supply_name = "vin-ldo2-5-7",
315 .volt_reg = AS3722_LDO7_VOLTAGE,
316 .volt_vsel_mask = AS3722_LDO_VSEL_MASK,
317 .enable_reg = AS3722_LDO_CONTROL0,
318 .enable_mask = AS3722_LDO7_CTRL,
319 .ext_enable_reg = AS3722_ENABLE_CTRL4,
320 .ext_enable_mask = AS3722_LDO7_EXT_ENABLE_MASK,
321 .ranges = as3722_ldo_ranges,
322 .nranges = nitems(as3722_ldo_ranges),
325 .id = AS3722_REG_ID_LDO9,
327 .supply_name = "vin-ldo9-10",
328 .volt_reg = AS3722_LDO9_VOLTAGE,
329 .volt_vsel_mask = AS3722_LDO_VSEL_MASK,
330 .enable_reg = AS3722_LDO_CONTROL1,
331 .enable_mask = AS3722_LDO9_CTRL,
332 .ext_enable_reg = AS3722_ENABLE_CTRL5,
333 .ext_enable_mask = AS3722_LDO9_EXT_ENABLE_MASK,
334 .ranges = as3722_ldo_ranges,
335 .nranges = nitems(as3722_ldo_ranges),
338 .id = AS3722_REG_ID_LDO10,
340 .supply_name = "vin-ldo9-10",
341 .volt_reg = AS3722_LDO10_VOLTAGE,
342 .volt_vsel_mask = AS3722_LDO_VSEL_MASK,
343 .enable_reg = AS3722_LDO_CONTROL1,
344 .enable_mask = AS3722_LDO10_CTRL,
345 .ext_enable_reg = AS3722_ENABLE_CTRL5,
346 .ext_enable_mask = AS3722_LDO10_EXT_ENABLE_MASK,
347 .ranges = as3722_ldo_ranges,
348 .nranges = nitems(as3722_ldo_ranges),
351 .id = AS3722_REG_ID_LDO11,
353 .supply_name = "vin-ldo11",
354 .volt_reg = AS3722_LDO11_VOLTAGE,
355 .volt_vsel_mask = AS3722_LDO_VSEL_MASK,
356 .enable_reg = AS3722_LDO_CONTROL1,
357 .enable_mask = AS3722_LDO11_CTRL,
358 .ext_enable_reg = AS3722_ENABLE_CTRL5,
359 .ext_enable_mask = AS3722_LDO11_EXT_ENABLE_MASK,
360 .ranges = as3722_ldo_ranges,
361 .nranges = nitems(as3722_ldo_ranges),
366 struct as3722_regnode_init_def {
367 struct regnode_init_def reg_init_def;
372 static int as3722_regnode_init(struct regnode *regnode);
373 static int as3722_regnode_enable(struct regnode *regnode, bool enable,
375 static int as3722_regnode_set_volt(struct regnode *regnode, int min_uvolt,
376 int max_uvolt, int *udelay);
377 static int as3722_regnode_get_volt(struct regnode *regnode, int *uvolt);
378 static regnode_method_t as3722_regnode_methods[] = {
379 /* Regulator interface */
380 REGNODEMETHOD(regnode_init, as3722_regnode_init),
381 REGNODEMETHOD(regnode_enable, as3722_regnode_enable),
382 REGNODEMETHOD(regnode_set_voltage, as3722_regnode_set_volt),
383 REGNODEMETHOD(regnode_get_voltage, as3722_regnode_get_volt),
386 DEFINE_CLASS_1(as3722_regnode, as3722_regnode_class, as3722_regnode_methods,
387 sizeof(struct as3722_reg_sc), regnode_class);
390 as3722_read_sel(struct as3722_reg_sc *sc, uint8_t *sel)
394 rv = RD1(sc->base_sc, sc->def->volt_reg, sel);
397 *sel &= sc->def->volt_vsel_mask;
398 *sel >>= ffs(sc->def->volt_vsel_mask) - 1;
403 as3722_write_sel(struct as3722_reg_sc *sc, uint8_t sel)
407 sel <<= ffs(sc->def->volt_vsel_mask) - 1;
408 sel &= sc->def->volt_vsel_mask;
410 rv = RM1(sc->base_sc, sc->def->volt_reg,
411 sc->def->volt_vsel_mask, sel);
418 as3722_sd0_is_low_voltage(struct as3722_reg_sc *sc)
423 rv = RD1(sc->base_sc, AS3722_FUSE7, &val);
426 return (val & AS3722_FUSE7_SD0_LOW_VOLTAGE ? true : false);
430 as3722_reg_extreg_setup(struct as3722_reg_sc *sc, int ext_pwr_ctrl)
435 val = ext_pwr_ctrl << (ffs(sc->def->ext_enable_mask) - 1);
436 rv = RM1(sc->base_sc, sc->def->ext_enable_reg,
437 sc->def->ext_enable_mask, val);
442 as3722_reg_enable(struct as3722_reg_sc *sc)
446 rv = RM1(sc->base_sc, sc->def->enable_reg,
447 sc->def->enable_mask, sc->def->enable_mask);
452 as3722_reg_disable(struct as3722_reg_sc *sc)
456 rv = RM1(sc->base_sc, sc->def->enable_reg,
457 sc->def->enable_mask, 0);
462 as3722_regnode_init(struct regnode *regnode)
464 struct as3722_reg_sc *sc;
467 sc = regnode_get_softc(regnode);
469 sc->enable_usec = 500;
470 if (sc->def->id == AS3722_REG_ID_SD0) {
471 if (as3722_sd0_is_low_voltage(sc)) {
472 sc->def->ranges = as3722_sd0_lv_ranges;
473 sc->def->nranges = nitems(as3722_sd0_lv_ranges);
475 sc->enable_usec = 600;
476 } else if (sc->def->id == AS3722_REG_ID_LDO3) {
477 if (sc->enable_tracking) {
478 rv = RM1(sc->base_sc, sc->def->volt_reg,
479 AS3722_LDO3_MODE_MASK,
480 AS3722_LDO3_MODE_PMOS_TRACKING);
482 device_printf(sc->base_sc->dev,
483 "LDO3 tracking failed: %d\n", rv);
489 if (sc->ext_control) {
491 rv = as3722_reg_enable(sc);
493 device_printf(sc->base_sc->dev,
494 "Failed to enable %s regulator: %d\n",
498 rv = as3722_reg_extreg_setup(sc, sc->ext_control);
500 device_printf(sc->base_sc->dev,
501 "%s ext control failed: %d", sc->def->name, rv);
509 as3722_fdt_parse(struct as3722_softc *sc, phandle_t node, struct reg_def *def,
510 struct as3722_regnode_init_def *init_def)
513 phandle_t parent, supply_node;
514 char prop_name[64]; /* Maximum OFW property name length. */
516 rv = regulator_parse_ofw_stdparam(sc->dev, node,
517 &init_def->reg_init_def);
519 rv = OF_getencprop(node, "ams,ext-control", &init_def->ext_control,
520 sizeof(init_def->ext_control));
522 init_def->ext_control = 0;
523 if (init_def->ext_control > 3) {
524 device_printf(sc->dev,
525 "Invalid value for ams,ext-control property: %d\n",
526 init_def->ext_control);
527 init_def->ext_control = 0;
529 if (OF_hasprop(node, "ams,enable-tracking"))
530 init_def->enable_tracking = 1;
533 /* Get parent supply. */
534 if (def->supply_name == NULL)
537 parent = OF_parent(node);
538 snprintf(prop_name, sizeof(prop_name), "%s-supply",
540 rv = OF_getencprop(parent, prop_name, &supply_node,
541 sizeof(supply_node));
544 supply_node = OF_node_from_xref(supply_node);
545 rv = OF_getprop_alloc(supply_node, "regulator-name",
546 (void **)&init_def->reg_init_def.parent_name);
548 init_def->reg_init_def.parent_name = NULL;
551 static struct as3722_reg_sc *
552 as3722_attach(struct as3722_softc *sc, phandle_t node, struct reg_def *def)
554 struct as3722_reg_sc *reg_sc;
555 struct as3722_regnode_init_def init_def;
556 struct regnode *regnode;
558 bzero(&init_def, sizeof(init_def));
560 as3722_fdt_parse(sc, node, def, &init_def);
561 init_def.reg_init_def.id = def->id;
562 init_def.reg_init_def.ofw_node = node;
563 regnode = regnode_create(sc->dev, &as3722_regnode_class,
564 &init_def.reg_init_def);
565 if (regnode == NULL) {
566 device_printf(sc->dev, "Cannot create regulator.\n");
569 reg_sc = regnode_get_softc(regnode);
571 /* Init regulator softc. */
572 reg_sc->regnode = regnode;
573 reg_sc->base_sc = sc;
575 reg_sc->xref = OF_xref_from_node(node);
577 reg_sc->param = regnode_get_stdparam(regnode);
578 reg_sc->ext_control = init_def.ext_control;
579 reg_sc->enable_tracking = init_def.enable_tracking;
581 regnode_register(regnode);
584 regnode_topo_slock();
585 rv = regnode_get_voltage(regnode, &volt);
587 device_printf(sc->dev,
588 " Regulator %s: parent doesn't exist yet.\n",
589 regnode_get_name(regnode));
590 } else if (rv != 0) {
591 device_printf(sc->dev,
592 " Regulator %s: voltage: INVALID!!!\n",
593 regnode_get_name(regnode));
595 device_printf(sc->dev,
596 " Regulator %s: voltage: %d uV\n",
597 regnode_get_name(regnode), volt);
599 regnode_topo_unlock();
606 as3722_regulator_attach(struct as3722_softc *sc, phandle_t node)
608 struct as3722_reg_sc *reg;
609 phandle_t child, rnode;
612 rnode = ofw_bus_find_child(node, "regulators");
614 device_printf(sc->dev, " Cannot find regulators subnode\n");
618 sc->nregs = nitems(as3722s_def);
619 sc->regs = malloc(sizeof(struct as3722_reg_sc *) * sc->nregs,
620 M_AS3722_REG, M_WAITOK | M_ZERO);
623 /* Attach all known regulators if exist in DT. */
624 for (i = 0; i < sc->nregs; i++) {
625 child = ofw_bus_find_child(rnode, as3722s_def[i].name);
628 device_printf(sc->dev,
629 "Regulator %s missing in DT\n",
630 as3722s_def[i].name);
633 reg = as3722_attach(sc, child, as3722s_def + i);
635 device_printf(sc->dev, "Cannot attach regulator: %s\n",
636 as3722s_def[i].name);
645 as3722_regulator_map(device_t dev, phandle_t xref, int ncells,
646 pcell_t *cells, int *num)
648 struct as3722_softc *sc;
651 sc = device_get_softc(dev);
652 for (i = 0; i < sc->nregs; i++) {
653 if (sc->regs[i] == NULL)
655 if (sc->regs[i]->xref == xref) {
656 *num = sc->regs[i]->def->id;
664 as3722_regnode_enable(struct regnode *regnode, bool val, int *udelay)
666 struct as3722_reg_sc *sc;
669 sc = regnode_get_softc(regnode);
672 rv = as3722_reg_enable(sc);
674 rv = as3722_reg_disable(sc);
675 *udelay = sc->enable_usec;
680 as3722_regnode_set_volt(struct regnode *regnode, int min_uvolt, int max_uvolt,
683 struct as3722_reg_sc *sc;
687 sc = regnode_get_softc(regnode);
690 rv = regulator_range_volt_to_sel8(sc->def->ranges, sc->def->nranges,
691 min_uvolt, max_uvolt, &sel);
694 rv = as3722_write_sel(sc, sel);
700 as3722_regnode_get_volt(struct regnode *regnode, int *uvolt)
702 struct as3722_reg_sc *sc;
706 sc = regnode_get_softc(regnode);
707 rv = as3722_read_sel(sc, &sel);
711 /* LDO6 have bypass. */
712 if (sc->def->id == AS3722_REG_ID_LDO6 && sel == AS3722_LDO6_SEL_BYPASS)
714 rv = regulator_range_sel8_to_volt(sc->def->ranges, sc->def->nranges,