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2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376

 kernel/drivers/regulator/ltc3589.c
..
..
@@ -1,21 +1,9 @@
1
-/*
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- * Linear Technology LTC3589,LTC3589-1 regulator support
3
- *
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- * Copyright (c) 2014 Philipp Zabel <p.zabel@pengutronix.de>, Pengutronix
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- *
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- * See file CREDITS for list of people who contributed to this
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- * project.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2
11
- * as published by the Free Software Foundation.
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- *
13
- * This program is distributed in the hope that it will be useful,
14
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
18
- */
1
+// SPDX-License-Identifier: GPL-2.0
2
+//
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+// Linear Technology LTC3589,LTC3589-1 regulator support
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+//
5
+// Copyright (c) 2014 Philipp Zabel <p.zabel@pengutronix.de>, Pengutronix
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+
19
7
 #include <linux/i2c.h>
20
8
 #include <linux/init.h>
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9
 #include <linux/interrupt.h>
..
..
@@ -84,19 +72,11 @@
84
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 	LTC3589_NUM_REGULATORS,
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73
 };
86
74
 
87
-struct ltc3589_regulator {
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-	struct regulator_desc desc;
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-
90
-	/* External feedback voltage divider */
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-	unsigned int r1;
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-	unsigned int r2;
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-};
94
-
95
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 struct ltc3589 {
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76
 	struct regmap *regmap;
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 	struct device *dev;
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78
 	enum ltc3589_variant variant;
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-	struct ltc3589_regulator regulator_descs[LTC3589_NUM_REGULATORS];
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+	struct regulator_desc regulator_descs[LTC3589_NUM_REGULATORS];
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 	struct regulator_dev *regulators[LTC3589_NUM_REGULATORS];
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81
 };
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82
 
..
..
@@ -196,131 +176,90 @@
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 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
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177
 };
198
178
 
179
+static inline unsigned int ltc3589_scale(unsigned int uV, u32 r1, u32 r2)
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+{
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+	uint64_t tmp;
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182
 
200
-#define LTC3589_REG(_name, _ops, en_bit, dtv1_reg, dtv_mask, go_bit)	\
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-	[LTC3589_ ## _name] = {						\
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-		.desc = {						\
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-			.name = #_name,					\
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-			.n_voltages = (dtv_mask) + 1,			\
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-			.min_uV = (go_bit) ? 362500 : 0,		\
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-			.uV_step = (go_bit) ? 12500 : 0,		\
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-			.ramp_delay = (go_bit) ? 1750 : 0,		\
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-			.fixed_uV = (dtv_mask) ? 0 : 800000,		\
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-			.ops = &ltc3589_ ## _ops ## _regulator_ops,	\
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-			.type = REGULATOR_VOLTAGE,			\
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-			.id = LTC3589_ ## _name,			\
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-			.owner = THIS_MODULE,				\
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-			.vsel_reg = (dtv1_reg),			\
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-			.vsel_mask = (dtv_mask),			\
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-			.apply_reg = (go_bit) ? LTC3589_VCCR : 0,	\
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-			.apply_bit = (go_bit),				\
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-			.enable_reg = (en_bit) ? LTC3589_OVEN : 0,	\
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-			.enable_mask = (en_bit),			\
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-		},							\
183
+	if (uV == 0)
184
+		return 0;
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+
186
+	tmp = (uint64_t)uV * r1;
187
+	do_div(tmp, r2);
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+	return uV + (unsigned int)tmp;
189
+}
190
+
191
+static int ltc3589_of_parse_cb(struct device_node *np,
192
+			       const struct regulator_desc *desc,
193
+			       struct regulator_config *config)
194
+{
195
+	struct ltc3589 *ltc3589 = config->driver_data;
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+	struct regulator_desc *rdesc = &ltc3589->regulator_descs[desc->id];
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+	u32 r[2];
198
+	int ret;
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+
200
+	/* Parse feedback voltage dividers. LDO3 and LDO4 don't have them */
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+	if (desc->id >= LTC3589_LDO3)
202
+		return 0;
203
+
204
+	ret = of_property_read_u32_array(np, "lltc,fb-voltage-divider", r, 2);
205
+	if (ret) {
206
+		dev_err(ltc3589->dev, "Failed to parse voltage divider: %d\n",
207
+			ret);
208
+		return ret;
220
209
 	}
221
210
 
222
-#define LTC3589_LINEAR_REG(_name, _dtv1)				\
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-	LTC3589_REG(_name, linear, LTC3589_OVEN_ ## _name,		\
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+	if (!r[0] || !r[1])
212
+		return 0;
213
+
214
+	rdesc->min_uV = ltc3589_scale(desc->min_uV, r[0], r[1]);
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+	rdesc->uV_step = ltc3589_scale(desc->uV_step, r[0], r[1]);
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+	rdesc->fixed_uV = ltc3589_scale(desc->fixed_uV, r[0], r[1]);
217
+
218
+	return 0;
219
+}
220
+
221
+#define LTC3589_REG(_name, _of_name, _ops, en_bit, dtv1_reg, dtv_mask, go_bit)\
222
+	[LTC3589_ ## _name] = {						\
223
+		.name = #_name,						\
224
+		.of_match = of_match_ptr(#_of_name),			\
225
+		.regulators_node = of_match_ptr("regulators"),		\
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+		.of_parse_cb = ltc3589_of_parse_cb,			\
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+		.n_voltages = (dtv_mask) + 1,				\
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+		.min_uV = (go_bit) ? 362500 : 0,			\
229
+		.uV_step = (go_bit) ? 12500 : 0,			\
230
+		.ramp_delay = (go_bit) ? 1750 : 0,			\
231
+		.fixed_uV = (dtv_mask) ? 0 : 800000,			\
232
+		.ops = &ltc3589_ ## _ops ## _regulator_ops,		\
233
+		.type = REGULATOR_VOLTAGE,				\
234
+		.id = LTC3589_ ## _name,				\
235
+		.owner = THIS_MODULE,					\
236
+		.vsel_reg = (dtv1_reg),					\
237
+		.vsel_mask = (dtv_mask),				\
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+		.apply_reg = (go_bit) ? LTC3589_VCCR : 0,		\
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+		.apply_bit = (go_bit),					\
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+		.enable_reg = (en_bit) ? LTC3589_OVEN : 0,		\
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+		.enable_mask = (en_bit),				\
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+	}
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+
244
+#define LTC3589_LINEAR_REG(_name, _of_name, _dtv1)			\
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+	LTC3589_REG(_name, _of_name, linear, LTC3589_OVEN_ ## _name,	\
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 		    LTC3589_ ## _dtv1, 0x1f,				\
225
247
 		    LTC3589_VCCR_ ## _name ## _GO)
226
248
 
227
-#define LTC3589_FIXED_REG(_name) \
228
-	LTC3589_REG(_name, fixed, LTC3589_OVEN_ ## _name, 0, 0, 0)
249
+#define LTC3589_FIXED_REG(_name, _of_name)				\
250
+	LTC3589_REG(_name, _of_name, fixed, LTC3589_OVEN_ ## _name, 0, 0, 0)
229
251
 
230
-static struct ltc3589_regulator ltc3589_regulators[LTC3589_NUM_REGULATORS] = {
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-	LTC3589_LINEAR_REG(SW1, B1DTV1),
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-	LTC3589_LINEAR_REG(SW2, B2DTV1),
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-	LTC3589_LINEAR_REG(SW3, B3DTV1),
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-	LTC3589_FIXED_REG(BB_OUT),
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-	LTC3589_REG(LDO1, fixed_standby, 0, 0, 0, 0),
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-	LTC3589_LINEAR_REG(LDO2, L2DTV1),
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-	LTC3589_FIXED_REG(LDO3),
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-	LTC3589_REG(LDO4, table, LTC3589_OVEN_LDO4, LTC3589_L2DTV2, 0x60, 0),
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+static const struct regulator_desc ltc3589_regulators[] = {
253
+	LTC3589_LINEAR_REG(SW1, sw1, B1DTV1),
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+	LTC3589_LINEAR_REG(SW2, sw2, B2DTV1),
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+	LTC3589_LINEAR_REG(SW3, sw3, B3DTV1),
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+	LTC3589_FIXED_REG(BB_OUT, bb-out),
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+	LTC3589_REG(LDO1, ldo1, fixed_standby, 0, 0, 0, 0),
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+	LTC3589_LINEAR_REG(LDO2, ldo2, L2DTV1),
259
+	LTC3589_FIXED_REG(LDO3, ldo3),
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+	LTC3589_REG(LDO4, ldo4, table, LTC3589_OVEN_LDO4, LTC3589_L2DTV2,
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+		    0x60, 0),
239
262
 };
240
-
241
-#ifdef CONFIG_OF
242
-static struct of_regulator_match ltc3589_matches[LTC3589_NUM_REGULATORS] = {
243
-	{ .name = "sw1",    },
244
-	{ .name = "sw2",    },
245
-	{ .name = "sw3",    },
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-	{ .name = "bb-out", },
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-	{ .name = "ldo1",   }, /* standby */
248
-	{ .name = "ldo2",   },
249
-	{ .name = "ldo3",   },
250
-	{ .name = "ldo4",   },
251
-};
252
-
253
-static int ltc3589_parse_regulators_dt(struct ltc3589 *ltc3589)
254
-{
255
-	struct device *dev = ltc3589->dev;
256
-	struct device_node *node;
257
-	int i, ret;
258
-
259
-	node = of_get_child_by_name(dev->of_node, "regulators");
260
-	if (!node) {
261
-		dev_err(dev, "regulators node not found\n");
262
-		return -EINVAL;
263
-	}
264
-
265
-	ret = of_regulator_match(dev, node, ltc3589_matches,
266
-				 ARRAY_SIZE(ltc3589_matches));
267
-	of_node_put(node);
268
-	if (ret < 0) {
269
-		dev_err(dev, "Error parsing regulator init data: %d\n", ret);
270
-		return ret;
271
-	}
272
-	if (ret != LTC3589_NUM_REGULATORS) {
273
-		dev_err(dev, "Only %d regulators described in device tree\n",
274
-			ret);
275
-		return -EINVAL;
276
-	}
277
-
278
-	/* Parse feedback voltage dividers. LDO3 and LDO4 don't have them */
279
-	for (i = 0; i < LTC3589_LDO3; i++) {
280
-		struct ltc3589_regulator *desc = &ltc3589->regulator_descs[i];
281
-		struct device_node *np = ltc3589_matches[i].of_node;
282
-		u32 vdiv[2];
283
-
284
-		ret = of_property_read_u32_array(np, "lltc,fb-voltage-divider",
285
-						 vdiv, 2);
286
-		if (ret) {
287
-			dev_err(dev, "Failed to parse voltage divider: %d\n",
288
-				ret);
289
-			return ret;
290
-		}
291
-
292
-		desc->r1 = vdiv[0];
293
-		desc->r2 = vdiv[1];
294
-	}
295
-
296
-	return 0;
297
-}
298
-
299
-static inline struct regulator_init_data *match_init_data(int index)
300
-{
301
-	return ltc3589_matches[index].init_data;
302
-}
303
-
304
-static inline struct device_node *match_of_node(int index)
305
-{
306
-	return ltc3589_matches[index].of_node;
307
-}
308
-#else
309
-static inline int ltc3589_parse_regulators_dt(struct ltc3589 *ltc3589)
310
-{
311
-	return 0;
312
-}
313
-
314
-static inline struct regulator_init_data *match_init_data(int index)
315
-{
316
-	return NULL;
317
-}
318
-
319
-static inline struct device_node *match_of_node(int index)
320
-{
321
-	return NULL;
322
-}
323
-#endif
324
263
 
325
264
 static bool ltc3589_writeable_reg(struct device *dev, unsigned int reg)
326
265
 {
..
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@@ -404,10 +343,10 @@
404
343
 	.max_register = LTC3589_L2DTV2,
405
344
 	.reg_defaults = ltc3589_reg_defaults,
406
345
 	.num_reg_defaults = ARRAY_SIZE(ltc3589_reg_defaults),
407
-	.use_single_rw = true,
346
+	.use_single_read = true,
347
+	.use_single_write = true,
408
348
 	.cache_type = REGCACHE_RBTREE,
409
349
 };
410
-
411
350
 
412
351
 static irqreturn_t ltc3589_isr(int irq, void *dev_id)
413
352
 {
..
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@@ -436,33 +375,11 @@
436
375
 	return IRQ_HANDLED;
437
376
 }
438
377
 
439
-static inline unsigned int ltc3589_scale(unsigned int uV, u32 r1, u32 r2)
440
-{
441
-	uint64_t tmp;
442
-	if (uV == 0)
443
-		return 0;
444
-	tmp = (uint64_t)uV * r1;
445
-	do_div(tmp, r2);
446
-	return uV + (unsigned int)tmp;
447
-}
448
-
449
-static void ltc3589_apply_fb_voltage_divider(struct ltc3589_regulator *rdesc)
450
-{
451
-	struct regulator_desc *desc = &rdesc->desc;
452
-
453
-	if (!rdesc->r1 || !rdesc->r2)
454
-		return;
455
-
456
-	desc->min_uV = ltc3589_scale(desc->min_uV, rdesc->r1, rdesc->r2);
457
-	desc->uV_step = ltc3589_scale(desc->uV_step, rdesc->r1, rdesc->r2);
458
-	desc->fixed_uV = ltc3589_scale(desc->fixed_uV, rdesc->r1, rdesc->r2);
459
-}
460
-
461
378
 static int ltc3589_probe(struct i2c_client *client,
462
379
 			 const struct i2c_device_id *id)
463
380
 {
464
381
 	struct device *dev = &client->dev;
465
-	struct ltc3589_regulator *descs;
382
+	struct regulator_desc *descs;
466
383
 	struct ltc3589 *ltc3589;
467
384
 	int i, ret;
468
385
 
..
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@@ -481,11 +398,11 @@
481
398
 	descs = ltc3589->regulator_descs;
482
399
 	memcpy(descs, ltc3589_regulators, sizeof(ltc3589_regulators));
483
400
 	if (ltc3589->variant == LTC3589) {
484
-		descs[LTC3589_LDO3].desc.fixed_uV = 1800000;
485
-		descs[LTC3589_LDO4].desc.volt_table = ltc3589_ldo4;
401
+		descs[LTC3589_LDO3].fixed_uV = 1800000;
402
+		descs[LTC3589_LDO4].volt_table = ltc3589_ldo4;
486
403
 	} else {
487
-		descs[LTC3589_LDO3].desc.fixed_uV = 2800000;
488
-		descs[LTC3589_LDO4].desc.volt_table = ltc3589_12_ldo4;
404
+		descs[LTC3589_LDO3].fixed_uV = 2800000;
405
+		descs[LTC3589_LDO4].volt_table = ltc3589_12_ldo4;
489
406
 	}
490
407
 
491
408
 	ltc3589->regmap = devm_regmap_init_i2c(client, &ltc3589_regmap_config);
..
..
@@ -495,25 +412,12 @@
495
412
 		return ret;
496
413
 	}
497
414
 
498
-	ret = ltc3589_parse_regulators_dt(ltc3589);
499
-	if (ret)
500
-		return ret;
501
-
502
415
 	for (i = 0; i < LTC3589_NUM_REGULATORS; i++) {
503
-		struct ltc3589_regulator *rdesc = &ltc3589->regulator_descs[i];
504
-		struct regulator_desc *desc = &rdesc->desc;
505
-		struct regulator_init_data *init_data;
416
+		struct regulator_desc *desc = &ltc3589->regulator_descs[i];
506
417
 		struct regulator_config config = { };
507
418
 
508
-		init_data = match_init_data(i);
509
-
510
-		if (i < LTC3589_LDO3)
511
-			ltc3589_apply_fb_voltage_divider(rdesc);
512
-
513
419
 		config.dev = dev;
514
-		config.init_data = init_data;
515
420
 		config.driver_data = ltc3589;
516
-		config.of_node = match_of_node(i);
517
421
 
518
422
 		ltc3589->regulators[i] = devm_regulator_register(dev, desc,
519
423
 								 &config);
..
..
@@ -547,7 +451,7 @@
547
451
 };
548
452
 MODULE_DEVICE_TABLE(i2c, ltc3589_i2c_id);
549
453
 
550
-static const struct of_device_id ltc3589_of_match[] = {
454
+static const struct of_device_id __maybe_unused ltc3589_of_match[] = {
551
455
 	{
552
456
 		.compatible = "lltc,ltc3589",
553
457
 		.data = (void *)LTC3589,