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2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376 
 kernel/drivers/regulator/lp8755.c
....@@ -1,14 +1,10 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * LP8755 High Performance Power Management Unit : System Interface Driver
34  * (based on rev. 0.26)
45  * Copyright 2012 Texas Instruments
56  *
67  * Author: Daniel(Geon Si) Jeong <daniel.jeong@ti.com>
7
- *
8
- * This program is free software; you can redistribute it and/or modify
9
- * it under the terms of the GNU General Public License version 2 as
10
- * published by the Free Software Foundation.
11
- *
128  */
139 
1410 #include <linux/module.h>
....@@ -53,53 +49,15 @@
5349 	struct regulator_dev *rdev[LP8755_BUCK_MAX];
5450 };
5551 
56
-/**
57
- *lp8755_read : read a single register value from lp8755.
58
- *@pchip : device to read from
59
- *@reg   : register to read from
60
- *@val   : pointer to store read value
61
- */
62
-static int lp8755_read(struct lp8755_chip *pchip, unsigned int reg,
63
-		       unsigned int *val)
64
-{
65
-	return regmap_read(pchip->regmap, reg, val);
66
-}
67
-
68
-/**
69
- *lp8755_write : write a single register value to lp8755.
70
- *@pchip : device to write to
71
- *@reg   : register to write to
72
- *@val   : value to be written
73
- */
74
-static int lp8755_write(struct lp8755_chip *pchip, unsigned int reg,
75
-			unsigned int val)
76
-{
77
-	return regmap_write(pchip->regmap, reg, val);
78
-}
79
-
80
-/**
81
- *lp8755_update_bits : set the values of bit fields in lp8755 register.
82
- *@pchip : device to read from
83
- *@reg   : register to update
84
- *@mask  : bitmask to be changed
85
- *@val   : value for bitmask
86
- */
87
-static int lp8755_update_bits(struct lp8755_chip *pchip, unsigned int reg,
88
-			      unsigned int mask, unsigned int val)
89
-{
90
-	return regmap_update_bits(pchip->regmap, reg, mask, val);
91
-}
92
-
9352 static int lp8755_buck_enable_time(struct regulator_dev *rdev)
9453 {
9554 	int ret;
9655 	unsigned int regval;
9756 	enum lp8755_bucks id = rdev_get_id(rdev);
98
-	struct lp8755_chip *pchip = rdev_get_drvdata(rdev);
9957 
100
-	ret = lp8755_read(pchip, 0x12 + id, &regval);
58
+	ret = regmap_read(rdev->regmap, 0x12 + id, &regval);
10159 	if (ret < 0) {
102
-		dev_err(pchip->dev, "i2c access error %s\n", __func__);
60
+		dev_err(&rdev->dev, "i2c access error %s\n", __func__);
10361 		return ret;
10462 	}
10563 	return (regval & 0xff) * 100;
....@@ -119,17 +77,17 @@
11977 		break;
12078 	case REGULATOR_MODE_NORMAL:
12179 		/* enable automatic pwm/pfm mode */
122
-		ret = lp8755_update_bits(pchip, 0x08 + id, 0x20, 0x00);
80
+		ret = regmap_update_bits(rdev->regmap, 0x08 + id, 0x20, 0x00);
12381 		if (ret < 0)
12482 			goto err_i2c;
12583 		break;
12684 	case REGULATOR_MODE_IDLE:
12785 		/* enable automatic pwm/pfm/lppfm mode */
128
-		ret = lp8755_update_bits(pchip, 0x08 + id, 0x20, 0x20);
86
+		ret = regmap_update_bits(rdev->regmap, 0x08 + id, 0x20, 0x20);
12987 		if (ret < 0)
13088 			goto err_i2c;
13189 
132
-		ret = lp8755_update_bits(pchip, 0x10, 0x01, 0x01);
90
+		ret = regmap_update_bits(rdev->regmap, 0x10, 0x01, 0x01);
13391 		if (ret < 0)
13492 			goto err_i2c;
13593 		break;
....@@ -139,12 +97,12 @@
13997 		regbval = (0x01 << id);
14098 	}
14199 
142
-	ret = lp8755_update_bits(pchip, 0x06, 0x01 << id, regbval);
100
+	ret = regmap_update_bits(rdev->regmap, 0x06, 0x01 << id, regbval);
143101 	if (ret < 0)
144102 		goto err_i2c;
145103 	return ret;
146104 err_i2c:
147
-	dev_err(pchip->dev, "i2c access error %s\n", __func__);
105
+	dev_err(&rdev->dev, "i2c access error %s\n", __func__);
148106 	return ret;
149107 }
150108 
....@@ -153,9 +111,8 @@
153111 	int ret;
154112 	unsigned int regval;
155113 	enum lp8755_bucks id = rdev_get_id(rdev);
156
-	struct lp8755_chip *pchip = rdev_get_drvdata(rdev);
157114 
158
-	ret = lp8755_read(pchip, 0x06, &regval);
115
+	ret = regmap_read(rdev->regmap, 0x06, &regval);
159116 	if (ret < 0)
160117 		goto err_i2c;
161118 
....@@ -163,7 +120,7 @@
163120 	if (regval & (0x01 << id))
164121 		return REGULATOR_MODE_FAST;
165122 
166
-	ret = lp8755_read(pchip, 0x08 + id, &regval);
123
+	ret = regmap_read(rdev->regmap, 0x08 + id, &regval);
167124 	if (ret < 0)
168125 		goto err_i2c;
169126 
....@@ -175,7 +132,7 @@
175132 	return REGULATOR_MODE_NORMAL;
176133 
177134 err_i2c:
178
-	dev_err(pchip->dev, "i2c access error %s\n", __func__);
135
+	dev_err(&rdev->dev, "i2c access error %s\n", __func__);
179136 	return 0;
180137 }
181138 
....@@ -184,7 +141,6 @@
184141 	int ret;
185142 	unsigned int regval = 0x00;
186143 	enum lp8755_bucks id = rdev_get_id(rdev);
187
-	struct lp8755_chip *pchip = rdev_get_drvdata(rdev);
188144 
189145 	/* uV/us */
190146 	switch (ramp) {
....@@ -213,17 +169,17 @@
213169 		regval = 0x00;
214170 		break;
215171 	default:
216
-		dev_err(pchip->dev,
172
+		dev_err(&rdev->dev,
217173 			"Not supported ramp value %d %s\n", ramp, __func__);
218174 		return -EINVAL;
219175 	}
220176 
221
-	ret = lp8755_update_bits(pchip, 0x07 + id, 0x07, regval);
177
+	ret = regmap_update_bits(rdev->regmap, 0x07 + id, 0x07, regval);
222178 	if (ret < 0)
223179 		goto err_i2c;
224180 	return ret;
225181 err_i2c:
226
-	dev_err(pchip->dev, "i2c access error %s\n", __func__);
182
+	dev_err(&rdev->dev, "i2c access error %s\n", __func__);
227183 	return ret;
228184 }
229185 
....@@ -282,7 +238,7 @@
282238 	struct lp8755_platform_data *pdata = pchip->pdata;
283239 
284240 	/* read back  muti-phase configuration */
285
-	ret = lp8755_read(pchip, 0x3D, &regval);
241
+	ret = regmap_read(pchip->regmap, 0x3D, &regval);
286242 	if (ret < 0)
287243 		goto out_i2c_error;
288244 	pchip->mphase = regval & 0x0F;
....@@ -315,7 +271,7 @@
315271 	.vsel_mask = LP8755_BUCK_VOUT_M,\
316272 }
317273 
318
-static struct regulator_desc lp8755_regulators[] = {
274
+static const struct regulator_desc lp8755_regulators[] = {
319275 	lp8755_buck_desc(0),
320276 	lp8755_buck_desc(1),
321277 	lp8755_buck_desc(2),
....@@ -360,11 +316,11 @@
360316 	struct lp8755_chip *pchip = data;
361317 
362318 	/* read flag0 register */
363
-	ret = lp8755_read(pchip, 0x0D, &flag0);
319
+	ret = regmap_read(pchip->regmap, 0x0D, &flag0);
364320 	if (ret < 0)
365321 		goto err_i2c;
366322 	/* clear flag register to pull up int. pin */
367
-	ret = lp8755_write(pchip, 0x0D, 0x00);
323
+	ret = regmap_write(pchip->regmap, 0x0D, 0x00);
368324 	if (ret < 0)
369325 		goto err_i2c;
370326 
....@@ -372,35 +328,38 @@
372328 	for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++)
373329 		if ((flag0 & (0x4 << icnt))
374330 		    && (pchip->irqmask & (0x04 << icnt))
375
-		    && (pchip->rdev[icnt] != NULL))
331
+		    && (pchip->rdev[icnt] != NULL)) {
376332 			regulator_notifier_call_chain(pchip->rdev[icnt],
377333 						      LP8755_EVENT_PWR_FAULT,
378334 						      NULL);
335
+		}
379336 
380337 	/* read flag1 register */
381
-	ret = lp8755_read(pchip, 0x0E, &flag1);
338
+	ret = regmap_read(pchip->regmap, 0x0E, &flag1);
382339 	if (ret < 0)
383340 		goto err_i2c;
384341 	/* clear flag register to pull up int. pin */
385
-	ret = lp8755_write(pchip, 0x0E, 0x00);
342
+	ret = regmap_write(pchip->regmap, 0x0E, 0x00);
386343 	if (ret < 0)
387344 		goto err_i2c;
388345 
389
-	/* send OCP event to all regualtor devices */
346
+	/* send OCP event to all regulator devices */
390347 	if ((flag1 & 0x01) && (pchip->irqmask & 0x01))
391348 		for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++)
392
-			if (pchip->rdev[icnt] != NULL)
349
+			if (pchip->rdev[icnt] != NULL) {
393350 				regulator_notifier_call_chain(pchip->rdev[icnt],
394351 							      LP8755_EVENT_OCP,
395352 							      NULL);
353
+			}
396354 
397
-	/* send OVP event to all regualtor devices */
355
+	/* send OVP event to all regulator devices */
398356 	if ((flag1 & 0x02) && (pchip->irqmask & 0x02))
399357 		for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++)
400
-			if (pchip->rdev[icnt] != NULL)
358
+			if (pchip->rdev[icnt] != NULL) {
401359 				regulator_notifier_call_chain(pchip->rdev[icnt],
402360 							      LP8755_EVENT_OVP,
403361 							      NULL);
362
+			}
404363 	return IRQ_HANDLED;
405364 
406365 err_i2c:
....@@ -418,7 +377,7 @@
418377 		return 0;
419378 	}
420379 
421
-	ret = lp8755_read(pchip, 0x0F, &regval);
380
+	ret = regmap_read(pchip->regmap, 0x0F, &regval);
422381 	if (ret < 0) {
423382 		dev_err(pchip->dev, "i2c access error %s\n", __func__);
424383 		return ret;
....@@ -497,7 +456,7 @@
497456 err:
498457 	/* output disable */
499458 	for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++)
500
-		lp8755_write(pchip, icnt, 0x00);
459
+		regmap_write(pchip->regmap, icnt, 0x00);
501460 
502461 	return ret;
503462 }
....@@ -508,7 +467,7 @@
508467 	struct lp8755_chip *pchip = i2c_get_clientdata(client);
509468 
510469 	for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++)
511
-		lp8755_write(pchip, icnt, 0x00);
470
+		regmap_write(pchip->regmap, icnt, 0x00);
512471 
513472 	return 0;
514473 }