add wifi6 8852be driver

hc

2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da

 kernel/drivers/rtc/rtc-snvs.c
..
..
@@ -7,8 +7,8 @@
7
7
 #include <linux/kernel.h>
8
8
 #include <linux/module.h>
9
9
 #include <linux/of.h>
10
-#include <linux/of_device.h>
11
10
 #include <linux/platform_device.h>
11
+#include <linux/pm_wakeirq.h>
12
12
 #include <linux/rtc.h>
13
13
 #include <linux/clk.h>
14
14
 #include <linux/mfd/syscon.h>
..
..
@@ -31,6 +31,14 @@
31
31
 
32
32
 #define SNVS_LPPGDR_INIT	0x41736166
33
33
 #define CNTR_TO_SECS_SH		15
34
+
35
+/* The maximum RTC clock cycles that are allowed to pass between two
36
+ * consecutive clock counter register reads. If the values are corrupted a
37
+ * bigger difference is expected. The RTC frequency is 32kHz. With 320 cycles
38
+ * we end at 10ms which should be enough for most cases. If it once takes
39
+ * longer than expected we do a retry.
40
+ */
41
+#define MAX_RTC_READ_DIFF_CYCLES	320
34
42
 
35
43
 struct snvs_rtc_data {
36
44
 	struct rtc_device *rtc;
..
..
@@ -56,6 +64,7 @@
56
64
 static u32 rtc_read_lp_counter(struct snvs_rtc_data *data)
57
65
 {
58
66
 	u64 read1, read2;
67
+	s64 diff;
59
68
 	unsigned int timeout = 100;
60
69
 
61
70
 	/* As expected, the registers might update between the read of the LSB
..
..
@@ -66,7 +75,8 @@
66
75
 	do {
67
76
 		read2 = read1;
68
77
 		read1 = rtc_read_lpsrt(data);
69
-	} while (read1 != read2 && --timeout);
78
+		diff = read1 - read2;
79
+	} while (((diff < 0) || (diff > MAX_RTC_READ_DIFF_CYCLES)) && --timeout);
70
80
 	if (!timeout)
71
81
 		dev_err(&data->rtc->dev, "Timeout trying to get valid LPSRT Counter read\n");
72
82
 
..
..
@@ -78,13 +88,15 @@
78
88
 static int rtc_read_lp_counter_lsb(struct snvs_rtc_data *data, u32 *lsb)
79
89
 {
80
90
 	u32 count1, count2;
91
+	s32 diff;
81
92
 	unsigned int timeout = 100;
82
93
 
83
94
 	regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count1);
84
95
 	do {
85
96
 		count2 = count1;
86
97
 		regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count1);
87
-	} while (count1 != count2 && --timeout);
98
+		diff = count1 - count2;
99
+	} while (((diff < 0) || (diff > MAX_RTC_READ_DIFF_CYCLES)) && --timeout);
88
100
 	if (!timeout) {
89
101
 		dev_err(&data->rtc->dev, "Timeout trying to get valid LPSRT Counter read\n");
90
102
 		return -ETIMEDOUT;
..
..
@@ -148,9 +160,20 @@
148
160
 static int snvs_rtc_read_time(struct device *dev, struct rtc_time *tm)
149
161
 {
150
162
 	struct snvs_rtc_data *data = dev_get_drvdata(dev);
151
-	unsigned long time = rtc_read_lp_counter(data);
163
+	unsigned long time;
164
+	int ret;
152
165
 
153
-	rtc_time_to_tm(time, tm);
166
+	if (data->clk) {
167
+		ret = clk_enable(data->clk);
168
+		if (ret)
169
+			return ret;
170
+	}
171
+
172
+	time = rtc_read_lp_counter(data);
173
+	rtc_time64_to_tm(time, tm);
174
+
175
+	if (data->clk)
176
+		clk_disable(data->clk);
154
177
 
155
178
 	return 0;
156
179
 }
..
..
@@ -158,10 +181,14 @@
158
181
 static int snvs_rtc_set_time(struct device *dev, struct rtc_time *tm)
159
182
 {
160
183
 	struct snvs_rtc_data *data = dev_get_drvdata(dev);
161
-	unsigned long time;
184
+	unsigned long time = rtc_tm_to_time64(tm);
162
185
 	int ret;
163
186
 
164
-	rtc_tm_to_time(tm, &time);
187
+	if (data->clk) {
188
+		ret = clk_enable(data->clk);
189
+		if (ret)
190
+			return ret;
191
+	}
165
192
 
166
193
 	/* Disable RTC first */
167
194
 	ret = snvs_rtc_enable(data, false);
..
..
@@ -175,6 +202,9 @@
175
202
 	/* Enable RTC again */
176
203
 	ret = snvs_rtc_enable(data, true);
177
204
 
205
+	if (data->clk)
206
+		clk_disable(data->clk);
207
+
178
208
 	return ret;
179
209
 }
180
210
 
..
..
@@ -182,12 +212,22 @@
182
212
 {
183
213
 	struct snvs_rtc_data *data = dev_get_drvdata(dev);
184
214
 	u32 lptar, lpsr;
215
+	int ret;
216
+
217
+	if (data->clk) {
218
+		ret = clk_enable(data->clk);
219
+		if (ret)
220
+			return ret;
221
+	}
185
222
 
186
223
 	regmap_read(data->regmap, data->offset + SNVS_LPTAR, &lptar);
187
-	rtc_time_to_tm(lptar, &alrm->time);
224
+	rtc_time64_to_tm(lptar, &alrm->time);
188
225
 
189
226
 	regmap_read(data->regmap, data->offset + SNVS_LPSR, &lpsr);
190
227
 	alrm->pending = (lpsr & SNVS_LPSR_LPTA) ? 1 : 0;
228
+
229
+	if (data->clk)
230
+		clk_disable(data->clk);
191
231
 
192
232
 	return 0;
193
233
 }
..
..
@@ -195,22 +235,37 @@
195
235
 static int snvs_rtc_alarm_irq_enable(struct device *dev, unsigned int enable)
196
236
 {
197
237
 	struct snvs_rtc_data *data = dev_get_drvdata(dev);
238
+	int ret;
239
+
240
+	if (data->clk) {
241
+		ret = clk_enable(data->clk);
242
+		if (ret)
243
+			return ret;
244
+	}
198
245
 
199
246
 	regmap_update_bits(data->regmap, data->offset + SNVS_LPCR,
200
247
 			   (SNVS_LPCR_LPTA_EN | SNVS_LPCR_LPWUI_EN),
201
248
 			   enable ? (SNVS_LPCR_LPTA_EN | SNVS_LPCR_LPWUI_EN) : 0);
202
249
 
203
-	return rtc_write_sync_lp(data);
250
+	ret = rtc_write_sync_lp(data);
251
+
252
+	if (data->clk)
253
+		clk_disable(data->clk);
254
+
255
+	return ret;
204
256
 }
205
257
 
206
258
 static int snvs_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
207
259
 {
208
260
 	struct snvs_rtc_data *data = dev_get_drvdata(dev);
209
-	struct rtc_time *alrm_tm = &alrm->time;
210
-	unsigned long time;
261
+	unsigned long time = rtc_tm_to_time64(&alrm->time);
211
262
 	int ret;
212
263
 
213
-	rtc_tm_to_time(alrm_tm, &time);
264
+	if (data->clk) {
265
+		ret = clk_enable(data->clk);
266
+		if (ret)
267
+			return ret;
268
+	}
214
269
 
215
270
 	regmap_update_bits(data->regmap, data->offset + SNVS_LPCR, SNVS_LPCR_LPTA_EN, 0);
216
271
 	ret = rtc_write_sync_lp(data);
..
..
@@ -220,6 +275,9 @@
220
275
 
221
276
 	/* Clear alarm interrupt status bit */
222
277
 	regmap_write(data->regmap, data->offset + SNVS_LPSR, SNVS_LPSR_LPTA);
278
+
279
+	if (data->clk)
280
+		clk_disable(data->clk);
223
281
 
224
282
 	return snvs_rtc_alarm_irq_enable(dev, alrm->enabled);
225
283
 }
..
..
@@ -239,6 +297,9 @@
239
297
 	u32 lpsr;
240
298
 	u32 events = 0;
241
299
 
300
+	if (data->clk)
301
+		clk_enable(data->clk);
302
+
242
303
 	regmap_read(data->regmap, data->offset + SNVS_LPSR, &lpsr);
243
304
 
244
305
 	if (lpsr & SNVS_LPSR_LPTA) {
..
..
@@ -253,6 +314,9 @@
253
314
 	/* clear interrupt status */
254
315
 	regmap_write(data->regmap, data->offset + SNVS_LPSR, lpsr);
255
316
 
317
+	if (data->clk)
318
+		clk_disable(data->clk);
319
+
256
320
 	return events ? IRQ_HANDLED : IRQ_NONE;
257
321
 }
258
322
 
..
..
@@ -262,10 +326,15 @@
262
326
 	.reg_stride = 4,
263
327
 };
264
328
 
329
+static void snvs_rtc_action(void *data)
330
+{
331
+	if (data)
332
+		clk_disable_unprepare(data);
333
+}
334
+
265
335
 static int snvs_rtc_probe(struct platform_device *pdev)
266
336
 {
267
337
 	struct snvs_rtc_data *data;
268
-	struct resource *res;
269
338
 	int ret;
270
339
 	void __iomem *mmio;
271
340
 
..
..
@@ -281,9 +350,8 @@
281
350
 
282
351
 	if (IS_ERR(data->regmap)) {
283
352
 		dev_warn(&pdev->dev, "snvs rtc: you use old dts file, please update it\n");
284
-		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
285
353
 
286
-		mmio = devm_ioremap_resource(&pdev->dev, res);
354
+		mmio = devm_platform_ioremap_resource(pdev, 0);
287
355
 		if (IS_ERR(mmio))
288
356
 			return PTR_ERR(mmio);
289
357
 
..
..
@@ -314,6 +382,10 @@
314
382
 		}
315
383
 	}
316
384
 
385
+	ret = devm_add_action_or_reset(&pdev->dev, snvs_rtc_action, data->clk);
386
+	if (ret)
387
+		return ret;
388
+
317
389
 	platform_set_drvdata(pdev, data);
318
390
 
319
391
 	/* Initialize glitch detect */
..
..
@@ -326,90 +398,51 @@
326
398
 	ret = snvs_rtc_enable(data, true);
327
399
 	if (ret) {
328
400
 		dev_err(&pdev->dev, "failed to enable rtc %d\n", ret);
329
-		goto error_rtc_device_register;
401
+		return ret;
330
402
 	}
331
403
 
332
404
 	device_init_wakeup(&pdev->dev, true);
405
+	ret = dev_pm_set_wake_irq(&pdev->dev, data->irq);
406
+	if (ret)
407
+		dev_err(&pdev->dev, "failed to enable irq wake\n");
333
408
 
334
409
 	ret = devm_request_irq(&pdev->dev, data->irq, snvs_rtc_irq_handler,
335
410
 			       IRQF_SHARED, "rtc alarm", &pdev->dev);
336
411
 	if (ret) {
337
412
 		dev_err(&pdev->dev, "failed to request irq %d: %d\n",
338
413
 			data->irq, ret);
339
-		goto error_rtc_device_register;
414
+		return ret;
340
415
 	}
341
416
 
342
417
 	data->rtc->ops = &snvs_rtc_ops;
343
-	ret = rtc_register_device(data->rtc);
344
-	if (ret) {
345
-		dev_err(&pdev->dev, "failed to register rtc: %d\n", ret);
346
-		goto error_rtc_device_register;
347
-	}
418
+	data->rtc->range_max = U32_MAX;
348
419
 
349
-	return 0;
350
-
351
-error_rtc_device_register:
352
-	if (data->clk)
353
-		clk_disable_unprepare(data->clk);
354
-
355
-	return ret;
420
+	return rtc_register_device(data->rtc);
356
421
 }
357
422
 
358
-#ifdef CONFIG_PM_SLEEP
359
-static int snvs_rtc_suspend(struct device *dev)
360
-{
361
-	struct snvs_rtc_data *data = dev_get_drvdata(dev);
362
-
363
-	if (device_may_wakeup(dev))
364
-		return enable_irq_wake(data->irq);
365
-
366
-	return 0;
367
-}
368
-
369
-static int snvs_rtc_suspend_noirq(struct device *dev)
423
+static int __maybe_unused snvs_rtc_suspend_noirq(struct device *dev)
370
424
 {
371
425
 	struct snvs_rtc_data *data = dev_get_drvdata(dev);
372
426
 
373
427
 	if (data->clk)
374
-		clk_disable_unprepare(data->clk);
428
+		clk_disable(data->clk);
375
429
 
376
430
 	return 0;
377
431
 }
378
432
 
379
-static int snvs_rtc_resume(struct device *dev)
380
-{
381
-	struct snvs_rtc_data *data = dev_get_drvdata(dev);
382
-
383
-	if (device_may_wakeup(dev))
384
-		return disable_irq_wake(data->irq);
385
-
386
-	return 0;
387
-}
388
-
389
-static int snvs_rtc_resume_noirq(struct device *dev)
433
+static int __maybe_unused snvs_rtc_resume_noirq(struct device *dev)
390
434
 {
391
435
 	struct snvs_rtc_data *data = dev_get_drvdata(dev);
392
436
 
393
437
 	if (data->clk)
394
-		return clk_prepare_enable(data->clk);
438
+		return clk_enable(data->clk);
395
439
 
396
440
 	return 0;
397
441
 }
398
442
 
399
443
 static const struct dev_pm_ops snvs_rtc_pm_ops = {
400
-	.suspend = snvs_rtc_suspend,
401
-	.suspend_noirq = snvs_rtc_suspend_noirq,
402
-	.resume = snvs_rtc_resume,
403
-	.resume_noirq = snvs_rtc_resume_noirq,
444
+	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(snvs_rtc_suspend_noirq, snvs_rtc_resume_noirq)
404
445
 };
405
-
406
-#define SNVS_RTC_PM_OPS	(&snvs_rtc_pm_ops)
407
-
408
-#else
409
-
410
-#define SNVS_RTC_PM_OPS	NULL
411
-
412
-#endif
413
446
 
414
447
 static const struct of_device_id snvs_dt_ids[] = {
415
448
 	{ .compatible = "fsl,sec-v4.0-mon-rtc-lp", },
..
..
@@ -420,7 +453,7 @@
420
453
 static struct platform_driver snvs_rtc_driver = {
421
454
 	.driver = {
422
455
 		.name	= "snvs_rtc",
423
-		.pm	= SNVS_RTC_PM_OPS,
456
+		.pm	= &snvs_rtc_pm_ops,
424
457
 		.of_match_table = snvs_dt_ids,
425
458
 	},
426
459
 	.probe		= snvs_rtc_probe,