1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2011-2014, The Linux Foundation. All rights reserved.
4 * Copyright (c) 2014,2015, Linaro Ltd.
5 *
6 * SAW power controller driver
7 */
8
9#include <linux/bitfield.h>
10#include <linux/err.h>
11#include <linux/init.h>
12#include <linux/io.h>
13#include <linux/iopoll.h>
14#include <linux/kernel.h>
15#include <linux/linear_range.h>
16#include <linux/module.h>
17#include <linux/of.h>
18#include <linux/platform_device.h>
19#include <linux/slab.h>
20#include <linux/smp.h>
21
22#include <linux/regulator/driver.h>
23
24#include <soc/qcom/spm.h>
25
26#define FIELD_SET(current, mask, val) \
27 (((current) & ~(mask)) | FIELD_PREP((mask), (val)))
28
29#define SPM_CTL_INDEX 0x7f
30#define SPM_CTL_INDEX_SHIFT 4
31#define SPM_CTL_EN BIT(0)
32
33/* These registers might be specific to SPM 1.1 */
34#define SPM_VCTL_VLVL GENMASK(7, 0)
35#define SPM_PMIC_DATA_0_VLVL GENMASK(7, 0)
36#define SPM_PMIC_DATA_1_MIN_VSEL GENMASK(5, 0)
37#define SPM_PMIC_DATA_1_MAX_VSEL GENMASK(21, 16)
38
39#define SPM_1_1_AVS_CTL_AVS_ENABLED BIT(27)
40#define SPM_AVS_CTL_MAX_VLVL GENMASK(22, 17)
41#define SPM_AVS_CTL_MIN_VLVL GENMASK(15, 10)
42
43enum spm_reg {
44 SPM_REG_CFG,
45 SPM_REG_SPM_CTL,
46 SPM_REG_DLY,
47 SPM_REG_PMIC_DLY,
48 SPM_REG_PMIC_DATA_0,
49 SPM_REG_PMIC_DATA_1,
50 SPM_REG_VCTL,
51 SPM_REG_SEQ_ENTRY,
52 SPM_REG_STS0,
53 SPM_REG_STS1,
54 SPM_REG_PMIC_STS,
55 SPM_REG_AVS_CTL,
56 SPM_REG_AVS_LIMIT,
57 SPM_REG_RST,
58 SPM_REG_NR,
59};
60
61#define MAX_PMIC_DATA 2
62#define MAX_SEQ_DATA 64
63
64struct spm_reg_data {
65 const u16 *reg_offset;
66 u32 spm_cfg;
67 u32 spm_dly;
68 u32 pmic_dly;
69 u32 pmic_data[MAX_PMIC_DATA];
70 u32 avs_ctl;
71 u32 avs_limit;
72 u8 seq[MAX_SEQ_DATA];
73 u8 start_index[PM_SLEEP_MODE_NR];
74
75 smp_call_func_t set_vdd;
76 /* for now we support only a single range */
77 struct linear_range *range;
78 unsigned int ramp_delay;
79 unsigned int init_uV;
80};
81
82struct spm_driver_data {
83 void __iomem *reg_base;
84 const struct spm_reg_data *reg_data;
85 struct device *dev;
86 unsigned int volt_sel;
87 int reg_cpu;
88};
89
90static const u16 spm_reg_offset_v4_1[SPM_REG_NR] = {
91 [SPM_REG_AVS_CTL] = 0x904,
92 [SPM_REG_AVS_LIMIT] = 0x908,
93};
94
95static const struct spm_reg_data spm_reg_660_gold_l2 = {
96 .reg_offset = spm_reg_offset_v4_1,
97 .avs_ctl = 0x1010031,
98 .avs_limit = 0x4580458,
99};
100
101static const struct spm_reg_data spm_reg_660_silver_l2 = {
102 .reg_offset = spm_reg_offset_v4_1,
103 .avs_ctl = 0x101c031,
104 .avs_limit = 0x4580458,
105};
106
107static const struct spm_reg_data spm_reg_8998_gold_l2 = {
108 .reg_offset = spm_reg_offset_v4_1,
109 .avs_ctl = 0x1010031,
110 .avs_limit = 0x4700470,
111};
112
113static const struct spm_reg_data spm_reg_8998_silver_l2 = {
114 .reg_offset = spm_reg_offset_v4_1,
115 .avs_ctl = 0x1010031,
116 .avs_limit = 0x4200420,
117};
118
119static const u16 spm_reg_offset_v3_0[SPM_REG_NR] = {
120 [SPM_REG_CFG] = 0x08,
121 [SPM_REG_SPM_CTL] = 0x30,
122 [SPM_REG_DLY] = 0x34,
123 [SPM_REG_SEQ_ENTRY] = 0x400,
124};
125
126/* SPM register data for 8909 */
127static const struct spm_reg_data spm_reg_8909_cpu = {
128 .reg_offset = spm_reg_offset_v3_0,
129 .spm_cfg = 0x1,
130 .spm_dly = 0x3C102800,
131 .seq = { 0x60, 0x03, 0x60, 0x0B, 0x0F, 0x20, 0x10, 0x80, 0x30, 0x90,
132 0x5B, 0x60, 0x03, 0x60, 0x76, 0x76, 0x0B, 0x94, 0x5B, 0x80,
133 0x10, 0x26, 0x30, 0x0F },
134 .start_index[PM_SLEEP_MODE_STBY] = 0,
135 .start_index[PM_SLEEP_MODE_SPC] = 5,
136};
137
138/* SPM register data for 8916 */
139static const struct spm_reg_data spm_reg_8916_cpu = {
140 .reg_offset = spm_reg_offset_v3_0,
141 .spm_cfg = 0x1,
142 .spm_dly = 0x3C102800,
143 .seq = { 0x60, 0x03, 0x60, 0x0B, 0x0F, 0x20, 0x10, 0x80, 0x30, 0x90,
144 0x5B, 0x60, 0x03, 0x60, 0x3B, 0x76, 0x76, 0x0B, 0x94, 0x5B,
145 0x80, 0x10, 0x26, 0x30, 0x0F },
146 .start_index[PM_SLEEP_MODE_STBY] = 0,
147 .start_index[PM_SLEEP_MODE_SPC] = 5,
148};
149
150static const struct spm_reg_data spm_reg_8939_cpu = {
151 .reg_offset = spm_reg_offset_v3_0,
152 .spm_cfg = 0x1,
153 .spm_dly = 0x3C102800,
154 .seq = { 0x60, 0x03, 0x60, 0x0B, 0x0F, 0x20, 0x50, 0x1B, 0x10, 0x80,
155 0x30, 0x90, 0x5B, 0x60, 0x50, 0x03, 0x60, 0x76, 0x76, 0x0B,
156 0x50, 0x1B, 0x94, 0x5B, 0x80, 0x10, 0x26, 0x30, 0x50, 0x0F },
157 .start_index[PM_SLEEP_MODE_STBY] = 0,
158 .start_index[PM_SLEEP_MODE_SPC] = 5,
159};
160
161static const u16 spm_reg_offset_v2_3[SPM_REG_NR] = {
162 [SPM_REG_CFG] = 0x08,
163 [SPM_REG_SPM_CTL] = 0x30,
164 [SPM_REG_DLY] = 0x34,
165 [SPM_REG_PMIC_DATA_0] = 0x40,
166 [SPM_REG_PMIC_DATA_1] = 0x44,
167};
168
169/* SPM register data for 8976 */
170static const struct spm_reg_data spm_reg_8976_gold_l2 = {
171 .reg_offset = spm_reg_offset_v2_3,
172 .spm_cfg = 0x14,
173 .spm_dly = 0x3c11840a,
174 .pmic_data[0] = 0x03030080,
175 .pmic_data[1] = 0x00030000,
176 .start_index[PM_SLEEP_MODE_STBY] = 0,
177 .start_index[PM_SLEEP_MODE_SPC] = 3,
178};
179
180static const struct spm_reg_data spm_reg_8976_silver_l2 = {
181 .reg_offset = spm_reg_offset_v2_3,
182 .spm_cfg = 0x14,
183 .spm_dly = 0x3c102800,
184 .pmic_data[0] = 0x03030080,
185 .pmic_data[1] = 0x00030000,
186 .start_index[PM_SLEEP_MODE_STBY] = 0,
187 .start_index[PM_SLEEP_MODE_SPC] = 2,
188};
189
190static const u16 spm_reg_offset_v2_1[SPM_REG_NR] = {
191 [SPM_REG_CFG] = 0x08,
192 [SPM_REG_SPM_CTL] = 0x30,
193 [SPM_REG_DLY] = 0x34,
194 [SPM_REG_SEQ_ENTRY] = 0x80,
195};
196
197/* SPM register data for 8974, 8084 */
198static const struct spm_reg_data spm_reg_8974_8084_cpu = {
199 .reg_offset = spm_reg_offset_v2_1,
200 .spm_cfg = 0x1,
201 .spm_dly = 0x3C102800,
202 .seq = { 0x03, 0x0B, 0x0F, 0x00, 0x20, 0x80, 0x10, 0xE8, 0x5B, 0x03,
203 0x3B, 0xE8, 0x5B, 0x82, 0x10, 0x0B, 0x30, 0x06, 0x26, 0x30,
204 0x0F },
205 .start_index[PM_SLEEP_MODE_STBY] = 0,
206 .start_index[PM_SLEEP_MODE_SPC] = 3,
207};
208
209/* SPM register data for 8226 */
210static const struct spm_reg_data spm_reg_8226_cpu = {
211 .reg_offset = spm_reg_offset_v2_1,
212 .spm_cfg = 0x0,
213 .spm_dly = 0x3C102800,
214 .seq = { 0x60, 0x03, 0x60, 0x0B, 0x0F, 0x20, 0x10, 0x80, 0x30, 0x90,
215 0x5B, 0x60, 0x03, 0x60, 0x3B, 0x76, 0x76, 0x0B, 0x94, 0x5B,
216 0x80, 0x10, 0x26, 0x30, 0x0F },
217 .start_index[PM_SLEEP_MODE_STBY] = 0,
218 .start_index[PM_SLEEP_MODE_SPC] = 5,
219};
220
221static const u16 spm_reg_offset_v1_1[SPM_REG_NR] = {
222 [SPM_REG_CFG] = 0x08,
223 [SPM_REG_STS0] = 0x0c,
224 [SPM_REG_STS1] = 0x10,
225 [SPM_REG_VCTL] = 0x14,
226 [SPM_REG_AVS_CTL] = 0x18,
227 [SPM_REG_SPM_CTL] = 0x20,
228 [SPM_REG_PMIC_DLY] = 0x24,
229 [SPM_REG_PMIC_DATA_0] = 0x28,
230 [SPM_REG_PMIC_DATA_1] = 0x2C,
231 [SPM_REG_SEQ_ENTRY] = 0x80,
232};
233
234static void smp_set_vdd_v1_1(void *data);
235
236/* SPM register data for 8064 */
237static struct linear_range spm_v1_1_regulator_range =
238 REGULATOR_LINEAR_RANGE(700000, 0, 56, 12500);
239
240static const struct spm_reg_data spm_reg_8064_cpu = {
241 .reg_offset = spm_reg_offset_v1_1,
242 .spm_cfg = 0x1F,
243 .pmic_dly = 0x02020004,
244 .pmic_data[0] = 0x0084009C,
245 .pmic_data[1] = 0x00A4001C,
246 .seq = { 0x03, 0x0F, 0x00, 0x24, 0x54, 0x10, 0x09, 0x03, 0x01,
247 0x10, 0x54, 0x30, 0x0C, 0x24, 0x30, 0x0F },
248 .start_index[PM_SLEEP_MODE_STBY] = 0,
249 .start_index[PM_SLEEP_MODE_SPC] = 2,
250 .set_vdd = smp_set_vdd_v1_1,
251 .range = &spm_v1_1_regulator_range,
252 .init_uV = 1300000,
253 .ramp_delay = 1250,
254};
255
256static inline void spm_register_write(struct spm_driver_data *drv,
257 enum spm_reg reg, u32 val)
258{
259 if (drv->reg_data->reg_offset[reg])
260 writel_relaxed(val, drv->reg_base +
261 drv->reg_data->reg_offset[reg]);
262}
263
264/* Ensure a guaranteed write, before return */
265static inline void spm_register_write_sync(struct spm_driver_data *drv,
266 enum spm_reg reg, u32 val)
267{
268 u32 ret;
269
270 if (!drv->reg_data->reg_offset[reg])
271 return;
272
273 do {
274 writel_relaxed(val, drv->reg_base +
275 drv->reg_data->reg_offset[reg]);
276 ret = readl_relaxed(drv->reg_base +
277 drv->reg_data->reg_offset[reg]);
278 if (ret == val)
279 break;
280 cpu_relax();
281 } while (1);
282}
283
284static inline u32 spm_register_read(struct spm_driver_data *drv,
285 enum spm_reg reg)
286{
287 return readl_relaxed(drv->reg_base + drv->reg_data->reg_offset[reg]);
288}
289
290void spm_set_low_power_mode(struct spm_driver_data *drv,
291 enum pm_sleep_mode mode)
292{
293 u32 start_index;
294 u32 ctl_val;
295
296 start_index = drv->reg_data->start_index[mode];
297
298 ctl_val = spm_register_read(drv, reg: SPM_REG_SPM_CTL);
299 ctl_val &= ~(SPM_CTL_INDEX << SPM_CTL_INDEX_SHIFT);
300 ctl_val |= start_index << SPM_CTL_INDEX_SHIFT;
301 ctl_val |= SPM_CTL_EN;
302 spm_register_write_sync(drv, reg: SPM_REG_SPM_CTL, val: ctl_val);
303}
304
305static int spm_set_voltage_sel(struct regulator_dev *rdev, unsigned int selector)
306{
307 struct spm_driver_data *drv = rdev_get_drvdata(rdev);
308
309 drv->volt_sel = selector;
310
311 /* Always do the SAW register writes on the corresponding CPU */
312 return smp_call_function_single(cpuid: drv->reg_cpu, func: drv->reg_data->set_vdd, info: drv, wait: true);
313}
314
315static int spm_get_voltage_sel(struct regulator_dev *rdev)
316{
317 struct spm_driver_data *drv = rdev_get_drvdata(rdev);
318
319 return drv->volt_sel;
320}
321
322static const struct regulator_ops spm_reg_ops = {
323 .set_voltage_sel = spm_set_voltage_sel,
324 .get_voltage_sel = spm_get_voltage_sel,
325 .list_voltage = regulator_list_voltage_linear_range,
326 .set_voltage_time_sel = regulator_set_voltage_time_sel,
327};
328
329static void smp_set_vdd_v1_1(void *data)
330{
331 struct spm_driver_data *drv = data;
332 unsigned int vctl, data0, data1, avs_ctl, sts;
333 unsigned int vlevel, volt_sel;
334 bool avs_enabled;
335
336 volt_sel = drv->volt_sel;
337 vlevel = volt_sel | 0x80; /* band */
338
339 avs_ctl = spm_register_read(drv, reg: SPM_REG_AVS_CTL);
340 vctl = spm_register_read(drv, reg: SPM_REG_VCTL);
341 data0 = spm_register_read(drv, reg: SPM_REG_PMIC_DATA_0);
342 data1 = spm_register_read(drv, reg: SPM_REG_PMIC_DATA_1);
343
344 avs_enabled = avs_ctl & SPM_1_1_AVS_CTL_AVS_ENABLED;
345
346 /* If AVS is enabled, switch it off during the voltage change */
347 if (avs_enabled) {
348 avs_ctl &= ~SPM_1_1_AVS_CTL_AVS_ENABLED;
349 spm_register_write(drv, reg: SPM_REG_AVS_CTL, val: avs_ctl);
350 }
351
352 /* Kick the state machine back to idle */
353 spm_register_write(drv, reg: SPM_REG_RST, val: 1);
354
355 vctl = FIELD_SET(vctl, SPM_VCTL_VLVL, vlevel);
356 data0 = FIELD_SET(data0, SPM_PMIC_DATA_0_VLVL, vlevel);
357 data1 = FIELD_SET(data1, SPM_PMIC_DATA_1_MIN_VSEL, volt_sel);
358 data1 = FIELD_SET(data1, SPM_PMIC_DATA_1_MAX_VSEL, volt_sel);
359
360 spm_register_write(drv, reg: SPM_REG_VCTL, val: vctl);
361 spm_register_write(drv, reg: SPM_REG_PMIC_DATA_0, val: data0);
362 spm_register_write(drv, reg: SPM_REG_PMIC_DATA_1, val: data1);
363
364 if (read_poll_timeout_atomic(spm_register_read,
365 sts, sts == vlevel,
366 1, 200, false,
367 drv, SPM_REG_STS1)) {
368 dev_err_ratelimited(drv->dev, "timeout setting the voltage (%x %x)!\n", sts, vlevel);
369 goto enable_avs;
370 }
371
372 if (avs_enabled) {
373 unsigned int max_avs = volt_sel;
374 unsigned int min_avs = max(max_avs, 4U) - 4;
375
376 avs_ctl = FIELD_SET(avs_ctl, SPM_AVS_CTL_MIN_VLVL, min_avs);
377 avs_ctl = FIELD_SET(avs_ctl, SPM_AVS_CTL_MAX_VLVL, max_avs);
378 spm_register_write(drv, reg: SPM_REG_AVS_CTL, val: avs_ctl);
379 }
380
381enable_avs:
382 if (avs_enabled) {
383 avs_ctl |= SPM_1_1_AVS_CTL_AVS_ENABLED;
384 spm_register_write(drv, reg: SPM_REG_AVS_CTL, val: avs_ctl);
385 }
386}
387
388static int spm_get_cpu(struct device *dev)
389{
390 int cpu;
391 bool found;
392
393 for_each_possible_cpu(cpu) {
394 struct device_node *cpu_node, *saw_node;
395
396 cpu_node = of_cpu_device_node_get(cpu);
397 if (!cpu_node)
398 continue;
399
400 saw_node = of_parse_phandle(np: cpu_node, phandle_name: "qcom,saw", index: 0);
401 found = (saw_node == dev->of_node);
402 of_node_put(node: saw_node);
403 of_node_put(node: cpu_node);
404
405 if (found)
406 return cpu;
407 }
408
409 /* L2 SPM is not bound to any CPU, voltage setting is not supported */
410
411 return -EOPNOTSUPP;
412}
413
414static int spm_register_regulator(struct device *dev, struct spm_driver_data *drv)
415{
416 struct regulator_config config = {
417 .dev = dev,
418 .driver_data = drv,
419 };
420 struct regulator_desc *rdesc;
421 struct regulator_dev *rdev;
422 int ret;
423 bool found;
424
425 if (!drv->reg_data->set_vdd)
426 return 0;
427
428 rdesc = devm_kzalloc(dev, size: sizeof(*rdesc), GFP_KERNEL);
429 if (!rdesc)
430 return -ENOMEM;
431
432 rdesc->name = "spm";
433 rdesc->of_match = of_match_ptr("regulator");
434 rdesc->type = REGULATOR_VOLTAGE;
435 rdesc->owner = THIS_MODULE;
436 rdesc->ops = &spm_reg_ops;
437
438 rdesc->linear_ranges = drv->reg_data->range;
439 rdesc->n_linear_ranges = 1;
440 rdesc->n_voltages = rdesc->linear_ranges[rdesc->n_linear_ranges - 1].max_sel + 1;
441 rdesc->ramp_delay = drv->reg_data->ramp_delay;
442
443 ret = spm_get_cpu(dev);
444 if (ret < 0)
445 return ret;
446
447 drv->reg_cpu = ret;
448 dev_dbg(dev, "SAW2 bound to CPU %d\n", drv->reg_cpu);
449
450 /*
451 * Program initial voltage, otherwise registration will also try
452 * setting the voltage, which might result in undervolting the CPU.
453 */
454 drv->volt_sel = DIV_ROUND_UP(drv->reg_data->init_uV - rdesc->min_uV,
455 rdesc->uV_step);
456 ret = linear_range_get_selector_high(r: drv->reg_data->range,
457 val: drv->reg_data->init_uV,
458 selector: &drv->volt_sel,
459 found: &found);
460 if (ret) {
461 dev_err(dev, "Initial uV value out of bounds\n");
462 return ret;
463 }
464
465 /* Always do the SAW register writes on the corresponding CPU */
466 smp_call_function_single(cpuid: drv->reg_cpu, func: drv->reg_data->set_vdd, info: drv, wait: true);
467
468 rdev = devm_regulator_register(dev, regulator_desc: rdesc, config: &config);
469 if (IS_ERR(ptr: rdev)) {
470 dev_err(dev, "failed to register regulator\n");
471 return PTR_ERR(ptr: rdev);
472 }
473
474 return 0;
475}
476
477static const struct of_device_id spm_match_table[] = {
478 { .compatible = "qcom,sdm660-gold-saw2-v4.1-l2",
479 .data = &spm_reg_660_gold_l2 },
480 { .compatible = "qcom,sdm660-silver-saw2-v4.1-l2",
481 .data = &spm_reg_660_silver_l2 },
482 { .compatible = "qcom,msm8226-saw2-v2.1-cpu",
483 .data = &spm_reg_8226_cpu },
484 { .compatible = "qcom,msm8909-saw2-v3.0-cpu",
485 .data = &spm_reg_8909_cpu },
486 { .compatible = "qcom,msm8916-saw2-v3.0-cpu",
487 .data = &spm_reg_8916_cpu },
488 { .compatible = "qcom,msm8939-saw2-v3.0-cpu",
489 .data = &spm_reg_8939_cpu },
490 { .compatible = "qcom,msm8974-saw2-v2.1-cpu",
491 .data = &spm_reg_8974_8084_cpu },
492 { .compatible = "qcom,msm8976-gold-saw2-v2.3-l2",
493 .data = &spm_reg_8976_gold_l2 },
494 { .compatible = "qcom,msm8976-silver-saw2-v2.3-l2",
495 .data = &spm_reg_8976_silver_l2 },
496 { .compatible = "qcom,msm8998-gold-saw2-v4.1-l2",
497 .data = &spm_reg_8998_gold_l2 },
498 { .compatible = "qcom,msm8998-silver-saw2-v4.1-l2",
499 .data = &spm_reg_8998_silver_l2 },
500 { .compatible = "qcom,apq8084-saw2-v2.1-cpu",
501 .data = &spm_reg_8974_8084_cpu },
502 { .compatible = "qcom,apq8064-saw2-v1.1-cpu",
503 .data = &spm_reg_8064_cpu },
504 { },
505};
506MODULE_DEVICE_TABLE(of, spm_match_table);
507
508static int spm_dev_probe(struct platform_device *pdev)
509{
510 const struct of_device_id *match_id;
511 struct spm_driver_data *drv;
512 void __iomem *addr;
513
514 drv = devm_kzalloc(dev: &pdev->dev, size: sizeof(*drv), GFP_KERNEL);
515 if (!drv)
516 return -ENOMEM;
517
518 drv->reg_base = devm_platform_ioremap_resource(pdev, index: 0);
519 if (IS_ERR(ptr: drv->reg_base))
520 return PTR_ERR(ptr: drv->reg_base);
521
522 match_id = of_match_node(matches: spm_match_table, node: pdev->dev.of_node);
523 if (!match_id)
524 return -ENODEV;
525
526 drv->reg_data = match_id->data;
527 drv->dev = &pdev->dev;
528 platform_set_drvdata(pdev, data: drv);
529
530 /* Write the SPM sequences first.. */
531 addr = drv->reg_base + drv->reg_data->reg_offset[SPM_REG_SEQ_ENTRY];
532 __iowrite32_copy(to: addr, from: drv->reg_data->seq,
533 ARRAY_SIZE(drv->reg_data->seq) / 4);
534
535 /*
536 * ..and then the control registers.
537 * On some SoC if the control registers are written first and if the
538 * CPU was held in reset, the reset signal could trigger the SPM state
539 * machine, before the sequences are completely written.
540 */
541 spm_register_write(drv, reg: SPM_REG_AVS_CTL, val: drv->reg_data->avs_ctl);
542 spm_register_write(drv, reg: SPM_REG_AVS_LIMIT, val: drv->reg_data->avs_limit);
543 spm_register_write(drv, reg: SPM_REG_CFG, val: drv->reg_data->spm_cfg);
544 spm_register_write(drv, reg: SPM_REG_DLY, val: drv->reg_data->spm_dly);
545 spm_register_write(drv, reg: SPM_REG_PMIC_DLY, val: drv->reg_data->pmic_dly);
546 spm_register_write(drv, reg: SPM_REG_PMIC_DATA_0,
547 val: drv->reg_data->pmic_data[0]);
548 spm_register_write(drv, reg: SPM_REG_PMIC_DATA_1,
549 val: drv->reg_data->pmic_data[1]);
550
551 /* Set up Standby as the default low power mode */
552 if (drv->reg_data->reg_offset[SPM_REG_SPM_CTL])
553 spm_set_low_power_mode(drv, mode: PM_SLEEP_MODE_STBY);
554
555 if (IS_ENABLED(CONFIG_REGULATOR))
556 return spm_register_regulator(dev: &pdev->dev, drv);
557
558 return 0;
559}
560
561static struct platform_driver spm_driver = {
562 .probe = spm_dev_probe,
563 .driver = {
564 .name = "qcom_spm",
565 .of_match_table = spm_match_table,
566 },
567};
568
569static int __init qcom_spm_init(void)
570{
571 return platform_driver_register(&spm_driver);
572}
573arch_initcall(qcom_spm_init);
574
575MODULE_DESCRIPTION("Qualcomm Subsystem Power Manager (SPM)");
576MODULE_LICENSE("GPL v2");
577

source code of linux/drivers/soc/qcom/spm.c