1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. */
3
4 #include <linux/err.h>
5 #include <linux/init.h>
6 #include <linux/kernel.h>
7 #include <linux/module.h>
8 #include <linux/mutex.h>
9 #include <linux/pm_domain.h>
10 #include <linux/of.h>
11 #include <linux/of_device.h>
12 #include <linux/platform_device.h>
13 #include <linux/pm_opp.h>
14 #include <linux/soc/qcom/smd-rpm.h>
15
16 #include <dt-bindings/power/qcom-rpmpd.h>
17
18 #define domain_to_rpmpd(domain) container_of(domain, struct rpmpd, pd)
19
20 /* Resource types:
21 * RPMPD_X is X encoded as a little-endian, lower-case, ASCII string */
22 #define RPMPD_SMPA 0x61706d73
23 #define RPMPD_LDOA 0x616f646c
24 #define RPMPD_SMPB 0x62706d73
25 #define RPMPD_LDOB 0x626f646c
26 #define RPMPD_RWCX 0x78637772
27 #define RPMPD_RWMX 0x786d7772
28 #define RPMPD_RWLC 0x636c7772
29 #define RPMPD_RWLM 0x6d6c7772
30 #define RPMPD_RWSC 0x63737772
31 #define RPMPD_RWSM 0x6d737772
32
33 /* Operation Keys */
34 #define KEY_CORNER 0x6e726f63 /* corn */
35 #define KEY_ENABLE 0x6e657773 /* swen */
36 #define KEY_FLOOR_CORNER 0x636676 /* vfc */
37 #define KEY_FLOOR_LEVEL 0x6c6676 /* vfl */
38 #define KEY_LEVEL 0x6c766c76 /* vlvl */
39
40 #define MAX_CORNER_RPMPD_STATE 6
41
42 #define DEFINE_RPMPD_PAIR(_platform, _name, _active, r_type, r_key, \
43 r_id) \
44 static struct rpmpd _platform##_##_active; \
45 static struct rpmpd _platform##_##_name = { \
46 .pd = { .name = #_name, }, \
47 .peer = &_platform##_##_active, \
48 .res_type = RPMPD_##r_type, \
49 .res_id = r_id, \
50 .key = KEY_##r_key, \
51 }; \
52 static struct rpmpd _platform##_##_active = { \
53 .pd = { .name = #_active, }, \
54 .peer = &_platform##_##_name, \
55 .active_only = true, \
56 .res_type = RPMPD_##r_type, \
57 .res_id = r_id, \
58 .key = KEY_##r_key, \
59 }
60
61 #define DEFINE_RPMPD_CORNER(_platform, _name, r_type, r_id) \
62 static struct rpmpd _platform##_##_name = { \
63 .pd = { .name = #_name, }, \
64 .res_type = RPMPD_##r_type, \
65 .res_id = r_id, \
66 .key = KEY_CORNER, \
67 }
68
69 #define DEFINE_RPMPD_LEVEL(_platform, _name, r_type, r_id) \
70 static struct rpmpd _platform##_##_name = { \
71 .pd = { .name = #_name, }, \
72 .res_type = RPMPD_##r_type, \
73 .res_id = r_id, \
74 .key = KEY_LEVEL, \
75 }
76
77 #define DEFINE_RPMPD_VFC(_platform, _name, r_type, r_id) \
78 static struct rpmpd _platform##_##_name = { \
79 .pd = { .name = #_name, }, \
80 .res_type = RPMPD_##r_type, \
81 .res_id = r_id, \
82 .key = KEY_FLOOR_CORNER, \
83 }
84
85 #define DEFINE_RPMPD_VFL(_platform, _name, r_type, r_id) \
86 static struct rpmpd _platform##_##_name = { \
87 .pd = { .name = #_name, }, \
88 .res_type = RPMPD_##r_type, \
89 .res_id = r_id, \
90 .key = KEY_FLOOR_LEVEL, \
91 }
92
93 struct rpmpd_req {
94 __le32 key;
95 __le32 nbytes;
96 __le32 value;
97 };
98
99 struct rpmpd {
100 struct generic_pm_domain pd;
101 struct rpmpd *peer;
102 const bool active_only;
103 unsigned int corner;
104 bool enabled;
105 const char *res_name;
106 const int res_type;
107 const int res_id;
108 struct qcom_smd_rpm *rpm;
109 unsigned int max_state;
110 __le32 key;
111 };
112
113 struct rpmpd_desc {
114 struct rpmpd **rpmpds;
115 size_t num_pds;
116 unsigned int max_state;
117 };
118
119 static DEFINE_MUTEX(rpmpd_lock);
120
121 /* mdm9607 RPM Power Domains */
122 DEFINE_RPMPD_PAIR(mdm9607, vddcx, vddcx_ao, SMPA, LEVEL, 3);
123 DEFINE_RPMPD_VFL(mdm9607, vddcx_vfl, SMPA, 3);
124
125 DEFINE_RPMPD_PAIR(mdm9607, vddmx, vddmx_ao, LDOA, LEVEL, 12);
126 DEFINE_RPMPD_VFL(mdm9607, vddmx_vfl, LDOA, 12);
127 static struct rpmpd *mdm9607_rpmpds[] = {
128 [MDM9607_VDDCX] = &mdm9607_vddcx,
129 [MDM9607_VDDCX_AO] = &mdm9607_vddcx_ao,
130 [MDM9607_VDDCX_VFL] = &mdm9607_vddcx_vfl,
131 [MDM9607_VDDMX] = &mdm9607_vddmx,
132 [MDM9607_VDDMX_AO] = &mdm9607_vddmx_ao,
133 [MDM9607_VDDMX_VFL] = &mdm9607_vddmx_vfl,
134 };
135
136 static const struct rpmpd_desc mdm9607_desc = {
137 .rpmpds = mdm9607_rpmpds,
138 .num_pds = ARRAY_SIZE(mdm9607_rpmpds),
139 .max_state = RPM_SMD_LEVEL_TURBO,
140 };
141
142 /* msm8939 RPM Power Domains */
143 DEFINE_RPMPD_PAIR(msm8939, vddmd, vddmd_ao, SMPA, CORNER, 1);
144 DEFINE_RPMPD_VFC(msm8939, vddmd_vfc, SMPA, 1);
145
146 DEFINE_RPMPD_PAIR(msm8939, vddcx, vddcx_ao, SMPA, CORNER, 2);
147 DEFINE_RPMPD_VFC(msm8939, vddcx_vfc, SMPA, 2);
148
149 DEFINE_RPMPD_PAIR(msm8939, vddmx, vddmx_ao, LDOA, CORNER, 3);
150
151 static struct rpmpd *msm8939_rpmpds[] = {
152 [MSM8939_VDDMDCX] = &msm8939_vddmd,
153 [MSM8939_VDDMDCX_AO] = &msm8939_vddmd_ao,
154 [MSM8939_VDDMDCX_VFC] = &msm8939_vddmd_vfc,
155 [MSM8939_VDDCX] = &msm8939_vddcx,
156 [MSM8939_VDDCX_AO] = &msm8939_vddcx_ao,
157 [MSM8939_VDDCX_VFC] = &msm8939_vddcx_vfc,
158 [MSM8939_VDDMX] = &msm8939_vddmx,
159 [MSM8939_VDDMX_AO] = &msm8939_vddmx_ao,
160 };
161
162 static const struct rpmpd_desc msm8939_desc = {
163 .rpmpds = msm8939_rpmpds,
164 .num_pds = ARRAY_SIZE(msm8939_rpmpds),
165 .max_state = MAX_CORNER_RPMPD_STATE,
166 };
167
168 /* msm8916 RPM Power Domains */
169 DEFINE_RPMPD_PAIR(msm8916, vddcx, vddcx_ao, SMPA, CORNER, 1);
170 DEFINE_RPMPD_PAIR(msm8916, vddmx, vddmx_ao, LDOA, CORNER, 3);
171
172 DEFINE_RPMPD_VFC(msm8916, vddcx_vfc, SMPA, 1);
173
174 static struct rpmpd *msm8916_rpmpds[] = {
175 [MSM8916_VDDCX] = &msm8916_vddcx,
176 [MSM8916_VDDCX_AO] = &msm8916_vddcx_ao,
177 [MSM8916_VDDCX_VFC] = &msm8916_vddcx_vfc,
178 [MSM8916_VDDMX] = &msm8916_vddmx,
179 [MSM8916_VDDMX_AO] = &msm8916_vddmx_ao,
180 };
181
182 static const struct rpmpd_desc msm8916_desc = {
183 .rpmpds = msm8916_rpmpds,
184 .num_pds = ARRAY_SIZE(msm8916_rpmpds),
185 .max_state = MAX_CORNER_RPMPD_STATE,
186 };
187
188 /* msm8976 RPM Power Domains */
189 DEFINE_RPMPD_PAIR(msm8976, vddcx, vddcx_ao, SMPA, LEVEL, 2);
190 DEFINE_RPMPD_PAIR(msm8976, vddmx, vddmx_ao, SMPA, LEVEL, 6);
191
192 DEFINE_RPMPD_VFL(msm8976, vddcx_vfl, RWSC, 2);
193 DEFINE_RPMPD_VFL(msm8976, vddmx_vfl, RWSM, 6);
194
195 static struct rpmpd *msm8976_rpmpds[] = {
196 [MSM8976_VDDCX] = &msm8976_vddcx,
197 [MSM8976_VDDCX_AO] = &msm8976_vddcx_ao,
198 [MSM8976_VDDCX_VFL] = &msm8976_vddcx_vfl,
199 [MSM8976_VDDMX] = &msm8976_vddmx,
200 [MSM8976_VDDMX_AO] = &msm8976_vddmx_ao,
201 [MSM8976_VDDMX_VFL] = &msm8976_vddmx_vfl,
202 };
203
204 static const struct rpmpd_desc msm8976_desc = {
205 .rpmpds = msm8976_rpmpds,
206 .num_pds = ARRAY_SIZE(msm8976_rpmpds),
207 .max_state = RPM_SMD_LEVEL_TURBO_HIGH,
208 };
209
210 /* msm8994 RPM Power domains */
211 DEFINE_RPMPD_PAIR(msm8994, vddcx, vddcx_ao, SMPA, CORNER, 1);
212 DEFINE_RPMPD_PAIR(msm8994, vddmx, vddmx_ao, SMPA, CORNER, 2);
213 /* Attention! *Some* 8994 boards with pm8004 may use SMPC here! */
214 DEFINE_RPMPD_CORNER(msm8994, vddgfx, SMPB, 2);
215
216 DEFINE_RPMPD_VFC(msm8994, vddcx_vfc, SMPA, 1);
217 DEFINE_RPMPD_VFC(msm8994, vddgfx_vfc, SMPB, 2);
218
219 static struct rpmpd *msm8994_rpmpds[] = {
220 [MSM8994_VDDCX] = &msm8994_vddcx,
221 [MSM8994_VDDCX_AO] = &msm8994_vddcx_ao,
222 [MSM8994_VDDCX_VFC] = &msm8994_vddcx_vfc,
223 [MSM8994_VDDMX] = &msm8994_vddmx,
224 [MSM8994_VDDMX_AO] = &msm8994_vddmx_ao,
225 [MSM8994_VDDGFX] = &msm8994_vddgfx,
226 [MSM8994_VDDGFX_VFC] = &msm8994_vddgfx_vfc,
227 };
228
229 static const struct rpmpd_desc msm8994_desc = {
230 .rpmpds = msm8994_rpmpds,
231 .num_pds = ARRAY_SIZE(msm8994_rpmpds),
232 .max_state = MAX_CORNER_RPMPD_STATE,
233 };
234
235 /* msm8996 RPM Power domains */
236 DEFINE_RPMPD_PAIR(msm8996, vddcx, vddcx_ao, SMPA, CORNER, 1);
237 DEFINE_RPMPD_PAIR(msm8996, vddmx, vddmx_ao, SMPA, CORNER, 2);
238 DEFINE_RPMPD_CORNER(msm8996, vddsscx, LDOA, 26);
239
240 DEFINE_RPMPD_VFC(msm8996, vddcx_vfc, SMPA, 1);
241 DEFINE_RPMPD_VFC(msm8996, vddsscx_vfc, LDOA, 26);
242
243 static struct rpmpd *msm8996_rpmpds[] = {
244 [MSM8996_VDDCX] = &msm8996_vddcx,
245 [MSM8996_VDDCX_AO] = &msm8996_vddcx_ao,
246 [MSM8996_VDDCX_VFC] = &msm8996_vddcx_vfc,
247 [MSM8996_VDDMX] = &msm8996_vddmx,
248 [MSM8996_VDDMX_AO] = &msm8996_vddmx_ao,
249 [MSM8996_VDDSSCX] = &msm8996_vddsscx,
250 [MSM8996_VDDSSCX_VFC] = &msm8996_vddsscx_vfc,
251 };
252
253 static const struct rpmpd_desc msm8996_desc = {
254 .rpmpds = msm8996_rpmpds,
255 .num_pds = ARRAY_SIZE(msm8996_rpmpds),
256 .max_state = MAX_CORNER_RPMPD_STATE,
257 };
258
259 /* msm8998 RPM Power domains */
260 DEFINE_RPMPD_PAIR(msm8998, vddcx, vddcx_ao, RWCX, LEVEL, 0);
261 DEFINE_RPMPD_VFL(msm8998, vddcx_vfl, RWCX, 0);
262
263 DEFINE_RPMPD_PAIR(msm8998, vddmx, vddmx_ao, RWMX, LEVEL, 0);
264 DEFINE_RPMPD_VFL(msm8998, vddmx_vfl, RWMX, 0);
265
266 DEFINE_RPMPD_LEVEL(msm8998, vdd_ssccx, RWSC, 0);
267 DEFINE_RPMPD_VFL(msm8998, vdd_ssccx_vfl, RWSC, 0);
268
269 DEFINE_RPMPD_LEVEL(msm8998, vdd_sscmx, RWSM, 0);
270 DEFINE_RPMPD_VFL(msm8998, vdd_sscmx_vfl, RWSM, 0);
271
272 static struct rpmpd *msm8998_rpmpds[] = {
273 [MSM8998_VDDCX] = &msm8998_vddcx,
274 [MSM8998_VDDCX_AO] = &msm8998_vddcx_ao,
275 [MSM8998_VDDCX_VFL] = &msm8998_vddcx_vfl,
276 [MSM8998_VDDMX] = &msm8998_vddmx,
277 [MSM8998_VDDMX_AO] = &msm8998_vddmx_ao,
278 [MSM8998_VDDMX_VFL] = &msm8998_vddmx_vfl,
279 [MSM8998_SSCCX] = &msm8998_vdd_ssccx,
280 [MSM8998_SSCCX_VFL] = &msm8998_vdd_ssccx_vfl,
281 [MSM8998_SSCMX] = &msm8998_vdd_sscmx,
282 [MSM8998_SSCMX_VFL] = &msm8998_vdd_sscmx_vfl,
283 };
284
285 static const struct rpmpd_desc msm8998_desc = {
286 .rpmpds = msm8998_rpmpds,
287 .num_pds = ARRAY_SIZE(msm8998_rpmpds),
288 .max_state = RPM_SMD_LEVEL_BINNING,
289 };
290
291 /* qcs404 RPM Power domains */
292 DEFINE_RPMPD_PAIR(qcs404, vddmx, vddmx_ao, RWMX, LEVEL, 0);
293 DEFINE_RPMPD_VFL(qcs404, vddmx_vfl, RWMX, 0);
294
295 DEFINE_RPMPD_LEVEL(qcs404, vdd_lpicx, RWLC, 0);
296 DEFINE_RPMPD_VFL(qcs404, vdd_lpicx_vfl, RWLC, 0);
297
298 DEFINE_RPMPD_LEVEL(qcs404, vdd_lpimx, RWLM, 0);
299 DEFINE_RPMPD_VFL(qcs404, vdd_lpimx_vfl, RWLM, 0);
300
301 static struct rpmpd *qcs404_rpmpds[] = {
302 [QCS404_VDDMX] = &qcs404_vddmx,
303 [QCS404_VDDMX_AO] = &qcs404_vddmx_ao,
304 [QCS404_VDDMX_VFL] = &qcs404_vddmx_vfl,
305 [QCS404_LPICX] = &qcs404_vdd_lpicx,
306 [QCS404_LPICX_VFL] = &qcs404_vdd_lpicx_vfl,
307 [QCS404_LPIMX] = &qcs404_vdd_lpimx,
308 [QCS404_LPIMX_VFL] = &qcs404_vdd_lpimx_vfl,
309 };
310
311 static const struct rpmpd_desc qcs404_desc = {
312 .rpmpds = qcs404_rpmpds,
313 .num_pds = ARRAY_SIZE(qcs404_rpmpds),
314 .max_state = RPM_SMD_LEVEL_BINNING,
315 };
316
317 /* sdm660 RPM Power domains */
318 DEFINE_RPMPD_PAIR(sdm660, vddcx, vddcx_ao, RWCX, LEVEL, 0);
319 DEFINE_RPMPD_VFL(sdm660, vddcx_vfl, RWCX, 0);
320
321 DEFINE_RPMPD_PAIR(sdm660, vddmx, vddmx_ao, RWMX, LEVEL, 0);
322 DEFINE_RPMPD_VFL(sdm660, vddmx_vfl, RWMX, 0);
323
324 DEFINE_RPMPD_LEVEL(sdm660, vdd_ssccx, RWLC, 0);
325 DEFINE_RPMPD_VFL(sdm660, vdd_ssccx_vfl, RWLC, 0);
326
327 DEFINE_RPMPD_LEVEL(sdm660, vdd_sscmx, RWLM, 0);
328 DEFINE_RPMPD_VFL(sdm660, vdd_sscmx_vfl, RWLM, 0);
329
330 static struct rpmpd *sdm660_rpmpds[] = {
331 [SDM660_VDDCX] = &sdm660_vddcx,
332 [SDM660_VDDCX_AO] = &sdm660_vddcx_ao,
333 [SDM660_VDDCX_VFL] = &sdm660_vddcx_vfl,
334 [SDM660_VDDMX] = &sdm660_vddmx,
335 [SDM660_VDDMX_AO] = &sdm660_vddmx_ao,
336 [SDM660_VDDMX_VFL] = &sdm660_vddmx_vfl,
337 [SDM660_SSCCX] = &sdm660_vdd_ssccx,
338 [SDM660_SSCCX_VFL] = &sdm660_vdd_ssccx_vfl,
339 [SDM660_SSCMX] = &sdm660_vdd_sscmx,
340 [SDM660_SSCMX_VFL] = &sdm660_vdd_sscmx_vfl,
341 };
342
343 static const struct rpmpd_desc sdm660_desc = {
344 .rpmpds = sdm660_rpmpds,
345 .num_pds = ARRAY_SIZE(sdm660_rpmpds),
346 .max_state = RPM_SMD_LEVEL_TURBO,
347 };
348
349 /* sm4250/6115 RPM Power domains */
350 DEFINE_RPMPD_PAIR(sm6115, vddcx, vddcx_ao, RWCX, LEVEL, 0);
351 DEFINE_RPMPD_VFL(sm6115, vddcx_vfl, RWCX, 0);
352
353 DEFINE_RPMPD_PAIR(sm6115, vddmx, vddmx_ao, RWMX, LEVEL, 0);
354 DEFINE_RPMPD_VFL(sm6115, vddmx_vfl, RWMX, 0);
355
356 DEFINE_RPMPD_LEVEL(sm6115, vdd_lpi_cx, RWLC, 0);
357 DEFINE_RPMPD_LEVEL(sm6115, vdd_lpi_mx, RWLM, 0);
358
359 static struct rpmpd *sm6115_rpmpds[] = {
360 [SM6115_VDDCX] = &sm6115_vddcx,
361 [SM6115_VDDCX_AO] = &sm6115_vddcx_ao,
362 [SM6115_VDDCX_VFL] = &sm6115_vddcx_vfl,
363 [SM6115_VDDMX] = &sm6115_vddmx,
364 [SM6115_VDDMX_AO] = &sm6115_vddmx_ao,
365 [SM6115_VDDMX_VFL] = &sm6115_vddmx_vfl,
366 [SM6115_VDD_LPI_CX] = &sm6115_vdd_lpi_cx,
367 [SM6115_VDD_LPI_MX] = &sm6115_vdd_lpi_mx,
368 };
369
370 static const struct rpmpd_desc sm6115_desc = {
371 .rpmpds = sm6115_rpmpds,
372 .num_pds = ARRAY_SIZE(sm6115_rpmpds),
373 .max_state = RPM_SMD_LEVEL_TURBO_NO_CPR,
374 };
375
376 static const struct of_device_id rpmpd_match_table[] = {
377 { .compatible = "qcom,mdm9607-rpmpd", .data = &mdm9607_desc },
378 { .compatible = "qcom,msm8916-rpmpd", .data = &msm8916_desc },
379 { .compatible = "qcom,msm8939-rpmpd", .data = &msm8939_desc },
380 { .compatible = "qcom,msm8976-rpmpd", .data = &msm8976_desc },
381 { .compatible = "qcom,msm8994-rpmpd", .data = &msm8994_desc },
382 { .compatible = "qcom,msm8996-rpmpd", .data = &msm8996_desc },
383 { .compatible = "qcom,msm8998-rpmpd", .data = &msm8998_desc },
384 { .compatible = "qcom,qcs404-rpmpd", .data = &qcs404_desc },
385 { .compatible = "qcom,sdm660-rpmpd", .data = &sdm660_desc },
386 { .compatible = "qcom,sm6115-rpmpd", .data = &sm6115_desc },
387 { }
388 };
389 MODULE_DEVICE_TABLE(of, rpmpd_match_table);
390
rpmpd_send_enable(struct rpmpd * pd,bool enable)391 static int rpmpd_send_enable(struct rpmpd *pd, bool enable)
392 {
393 struct rpmpd_req req = {
394 .key = KEY_ENABLE,
395 .nbytes = cpu_to_le32(sizeof(u32)),
396 .value = cpu_to_le32(enable),
397 };
398
399 return qcom_rpm_smd_write(pd->rpm, QCOM_SMD_RPM_ACTIVE_STATE,
400 pd->res_type, pd->res_id, &req, sizeof(req));
401 }
402
rpmpd_send_corner(struct rpmpd * pd,int state,unsigned int corner)403 static int rpmpd_send_corner(struct rpmpd *pd, int state, unsigned int corner)
404 {
405 struct rpmpd_req req = {
406 .key = pd->key,
407 .nbytes = cpu_to_le32(sizeof(u32)),
408 .value = cpu_to_le32(corner),
409 };
410
411 return qcom_rpm_smd_write(pd->rpm, state, pd->res_type, pd->res_id,
412 &req, sizeof(req));
413 };
414
to_active_sleep(struct rpmpd * pd,unsigned int corner,unsigned int * active,unsigned int * sleep)415 static void to_active_sleep(struct rpmpd *pd, unsigned int corner,
416 unsigned int *active, unsigned int *sleep)
417 {
418 *active = corner;
419
420 if (pd->active_only)
421 *sleep = 0;
422 else
423 *sleep = *active;
424 }
425
rpmpd_aggregate_corner(struct rpmpd * pd)426 static int rpmpd_aggregate_corner(struct rpmpd *pd)
427 {
428 int ret;
429 struct rpmpd *peer = pd->peer;
430 unsigned int active_corner, sleep_corner;
431 unsigned int this_active_corner = 0, this_sleep_corner = 0;
432 unsigned int peer_active_corner = 0, peer_sleep_corner = 0;
433
434 to_active_sleep(pd, pd->corner, &this_active_corner, &this_sleep_corner);
435
436 if (peer && peer->enabled)
437 to_active_sleep(peer, peer->corner, &peer_active_corner,
438 &peer_sleep_corner);
439
440 active_corner = max(this_active_corner, peer_active_corner);
441
442 ret = rpmpd_send_corner(pd, QCOM_SMD_RPM_ACTIVE_STATE, active_corner);
443 if (ret)
444 return ret;
445
446 sleep_corner = max(this_sleep_corner, peer_sleep_corner);
447
448 return rpmpd_send_corner(pd, QCOM_SMD_RPM_SLEEP_STATE, sleep_corner);
449 }
450
rpmpd_power_on(struct generic_pm_domain * domain)451 static int rpmpd_power_on(struct generic_pm_domain *domain)
452 {
453 int ret;
454 struct rpmpd *pd = domain_to_rpmpd(domain);
455
456 mutex_lock(&rpmpd_lock);
457
458 ret = rpmpd_send_enable(pd, true);
459 if (ret)
460 goto out;
461
462 pd->enabled = true;
463
464 if (pd->corner)
465 ret = rpmpd_aggregate_corner(pd);
466
467 out:
468 mutex_unlock(&rpmpd_lock);
469
470 return ret;
471 }
472
rpmpd_power_off(struct generic_pm_domain * domain)473 static int rpmpd_power_off(struct generic_pm_domain *domain)
474 {
475 int ret;
476 struct rpmpd *pd = domain_to_rpmpd(domain);
477
478 mutex_lock(&rpmpd_lock);
479
480 ret = rpmpd_send_enable(pd, false);
481 if (!ret)
482 pd->enabled = false;
483
484 mutex_unlock(&rpmpd_lock);
485
486 return ret;
487 }
488
rpmpd_set_performance(struct generic_pm_domain * domain,unsigned int state)489 static int rpmpd_set_performance(struct generic_pm_domain *domain,
490 unsigned int state)
491 {
492 int ret = 0;
493 struct rpmpd *pd = domain_to_rpmpd(domain);
494
495 if (state > pd->max_state)
496 state = pd->max_state;
497
498 mutex_lock(&rpmpd_lock);
499
500 pd->corner = state;
501
502 /* Always send updates for vfc and vfl */
503 if (!pd->enabled && pd->key != KEY_FLOOR_CORNER &&
504 pd->key != KEY_FLOOR_LEVEL)
505 goto out;
506
507 ret = rpmpd_aggregate_corner(pd);
508
509 out:
510 mutex_unlock(&rpmpd_lock);
511
512 return ret;
513 }
514
rpmpd_get_performance(struct generic_pm_domain * genpd,struct dev_pm_opp * opp)515 static unsigned int rpmpd_get_performance(struct generic_pm_domain *genpd,
516 struct dev_pm_opp *opp)
517 {
518 return dev_pm_opp_get_level(opp);
519 }
520
rpmpd_probe(struct platform_device * pdev)521 static int rpmpd_probe(struct platform_device *pdev)
522 {
523 int i;
524 size_t num;
525 struct genpd_onecell_data *data;
526 struct qcom_smd_rpm *rpm;
527 struct rpmpd **rpmpds;
528 const struct rpmpd_desc *desc;
529
530 rpm = dev_get_drvdata(pdev->dev.parent);
531 if (!rpm) {
532 dev_err(&pdev->dev, "Unable to retrieve handle to RPM\n");
533 return -ENODEV;
534 }
535
536 desc = of_device_get_match_data(&pdev->dev);
537 if (!desc)
538 return -EINVAL;
539
540 rpmpds = desc->rpmpds;
541 num = desc->num_pds;
542
543 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
544 if (!data)
545 return -ENOMEM;
546
547 data->domains = devm_kcalloc(&pdev->dev, num, sizeof(*data->domains),
548 GFP_KERNEL);
549 if (!data->domains)
550 return -ENOMEM;
551
552 data->num_domains = num;
553
554 for (i = 0; i < num; i++) {
555 if (!rpmpds[i]) {
556 dev_warn(&pdev->dev, "rpmpds[] with empty entry at index=%d\n",
557 i);
558 continue;
559 }
560
561 rpmpds[i]->rpm = rpm;
562 rpmpds[i]->max_state = desc->max_state;
563 rpmpds[i]->pd.power_off = rpmpd_power_off;
564 rpmpds[i]->pd.power_on = rpmpd_power_on;
565 rpmpds[i]->pd.set_performance_state = rpmpd_set_performance;
566 rpmpds[i]->pd.opp_to_performance_state = rpmpd_get_performance;
567 pm_genpd_init(&rpmpds[i]->pd, NULL, true);
568
569 data->domains[i] = &rpmpds[i]->pd;
570 }
571
572 return of_genpd_add_provider_onecell(pdev->dev.of_node, data);
573 }
574
575 static struct platform_driver rpmpd_driver = {
576 .driver = {
577 .name = "qcom-rpmpd",
578 .of_match_table = rpmpd_match_table,
579 .suppress_bind_attrs = true,
580 },
581 .probe = rpmpd_probe,
582 };
583
rpmpd_init(void)584 static int __init rpmpd_init(void)
585 {
586 return platform_driver_register(&rpmpd_driver);
587 }
588 core_initcall(rpmpd_init);
589
590 MODULE_DESCRIPTION("Qualcomm Technologies, Inc. RPM Power Domain Driver");
591 MODULE_LICENSE("GPL v2");
592