1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright 2020 NXP.
  4 * NXP PCA9450 pmic driver
  5 */
  6
  7#include <linux/err.h>
  8#include <linux/gpio/consumer.h>
  9#include <linux/i2c.h>
 10#include <linux/interrupt.h>
 11#include <linux/kernel.h>
 12#include <linux/module.h>
 13#include <linux/of.h>
 14#include <linux/of_device.h>
 15#include <linux/platform_device.h>
 16#include <linux/regulator/driver.h>
 17#include <linux/regulator/machine.h>
 18#include <linux/regulator/of_regulator.h>
 19#include <linux/regulator/pca9450.h>
 20
 21struct pc9450_dvs_config {
 22	unsigned int run_reg; /* dvs0 */
 23	unsigned int run_mask;
 24	unsigned int standby_reg; /* dvs1 */
 25	unsigned int standby_mask;
 26};
 27
 28struct pca9450_regulator_desc {
 29	struct regulator_desc desc;
 30	const struct pc9450_dvs_config dvs;
 31};
 32
 33struct pca9450 {
 34	struct device *dev;
 35	struct regmap *regmap;
 36	struct gpio_desc *sd_vsel_gpio;
 37	enum pca9450_chip_type type;
 38	unsigned int rcnt;
 39	int irq;
 40};
 41
 42static const struct regmap_range pca9450_status_range = {
 43	.range_min = PCA9450_REG_INT1,
 44	.range_max = PCA9450_REG_PWRON_STAT,
 45};
 46
 47static const struct regmap_access_table pca9450_volatile_regs = {
 48	.yes_ranges = &pca9450_status_range,
 49	.n_yes_ranges = 1,
 50};
 51
 52static const struct regmap_config pca9450_regmap_config = {
 53	.reg_bits = 8,
 54	.val_bits = 8,
 55	.volatile_table = &pca9450_volatile_regs,
 56	.max_register = PCA9450_MAX_REGISTER - 1,
 57	.cache_type = REGCACHE_RBTREE,
 58};
 59
 60/*
 61 * BUCK1/2/3
 62 * BUCK1RAM[1:0] BUCK1 DVS ramp rate setting
 63 * 00: 25mV/1usec
 64 * 01: 25mV/2usec
 65 * 10: 25mV/4usec
 66 * 11: 25mV/8usec
 67 */
 68static const unsigned int pca9450_dvs_buck_ramp_table[] = {
 69	25000, 12500, 6250, 3125
 70};
 71
 72static const struct regulator_ops pca9450_dvs_buck_regulator_ops = {
 73	.enable = regulator_enable_regmap,
 74	.disable = regulator_disable_regmap,
 75	.is_enabled = regulator_is_enabled_regmap,
 76	.list_voltage = regulator_list_voltage_linear_range,
 77	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 78	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 79	.set_voltage_time_sel = regulator_set_voltage_time_sel,
 80	.set_ramp_delay	= regulator_set_ramp_delay_regmap,
 81};
 82
 83static const struct regulator_ops pca9450_buck_regulator_ops = {
 84	.enable = regulator_enable_regmap,
 85	.disable = regulator_disable_regmap,
 86	.is_enabled = regulator_is_enabled_regmap,
 87	.list_voltage = regulator_list_voltage_linear_range,
 88	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 89	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 90	.set_voltage_time_sel = regulator_set_voltage_time_sel,
 91};
 92
 93static const struct regulator_ops pca9450_ldo_regulator_ops = {
 94	.enable = regulator_enable_regmap,
 95	.disable = regulator_disable_regmap,
 96	.is_enabled = regulator_is_enabled_regmap,
 97	.list_voltage = regulator_list_voltage_linear_range,
 98	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 99	.get_voltage_sel = regulator_get_voltage_sel_regmap,
100};
101
102/*
103 * BUCK1/2/3
104 * 0.60 to 2.1875V (12.5mV step)
105 */
106static const struct linear_range pca9450_dvs_buck_volts[] = {
107	REGULATOR_LINEAR_RANGE(600000,  0x00, 0x7F, 12500),
108};
109
110/*
111 * BUCK4/5/6
112 * 0.6V to 3.4V (25mV step)
113 */
114static const struct linear_range pca9450_buck_volts[] = {
115	REGULATOR_LINEAR_RANGE(600000, 0x00, 0x70, 25000),
116	REGULATOR_LINEAR_RANGE(3400000, 0x71, 0x7F, 0),
117};
118
119/*
120 * LDO1
121 * 1.6 to 3.3V ()
122 */
123static const struct linear_range pca9450_ldo1_volts[] = {
124	REGULATOR_LINEAR_RANGE(1600000, 0x00, 0x03, 100000),
125	REGULATOR_LINEAR_RANGE(3000000, 0x04, 0x07, 100000),
126};
127
128/*
129 * LDO2
130 * 0.8 to 1.15V (50mV step)
131 */
132static const struct linear_range pca9450_ldo2_volts[] = {
133	REGULATOR_LINEAR_RANGE(800000, 0x00, 0x07, 50000),
134};
135
136/*
137 * LDO3/4
138 * 0.8 to 3.3V (100mV step)
139 */
140static const struct linear_range pca9450_ldo34_volts[] = {
141	REGULATOR_LINEAR_RANGE(800000, 0x00, 0x19, 100000),
142	REGULATOR_LINEAR_RANGE(3300000, 0x1A, 0x1F, 0),
143};
144
145/*
146 * LDO5
147 * 1.8 to 3.3V (100mV step)
148 */
149static const struct linear_range pca9450_ldo5_volts[] = {
150	REGULATOR_LINEAR_RANGE(1800000,  0x00, 0x0F, 100000),
151};
152
153static int buck_set_dvs(const struct regulator_desc *desc,
154			struct device_node *np, struct regmap *regmap,
155			char *prop, unsigned int reg, unsigned int mask)
156{
157	int ret, i;
158	uint32_t uv;
159
160	ret = of_property_read_u32(np, prop, &uv);
161	if (ret == -EINVAL)
162		return 0;
163	else if (ret)
164		return ret;
165
166	for (i = 0; i < desc->n_voltages; i++) {
167		ret = regulator_desc_list_voltage_linear_range(desc, i);
168		if (ret < 0)
169			continue;
170		if (ret == uv) {
171			i <<= ffs(desc->vsel_mask) - 1;
172			ret = regmap_update_bits(regmap, reg, mask, i);
173			break;
174		}
175	}
176
177	if (ret == 0) {
178		struct pca9450_regulator_desc *regulator = container_of(desc,
179					struct pca9450_regulator_desc, desc);
180
181		/* Enable DVS control through PMIC_STBY_REQ for this BUCK */
182		ret = regmap_update_bits(regmap, regulator->desc.enable_reg,
183					 BUCK1_DVS_CTRL, BUCK1_DVS_CTRL);
184	}
185	return ret;
186}
187
188static int pca9450_set_dvs_levels(struct device_node *np,
189			    const struct regulator_desc *desc,
190			    struct regulator_config *cfg)
191{
192	struct pca9450_regulator_desc *data = container_of(desc,
193					struct pca9450_regulator_desc, desc);
194	const struct pc9450_dvs_config *dvs = &data->dvs;
195	unsigned int reg, mask;
196	char *prop;
197	int i, ret = 0;
198
199	for (i = 0; i < PCA9450_DVS_LEVEL_MAX; i++) {
200		switch (i) {
201		case PCA9450_DVS_LEVEL_RUN:
202			prop = "nxp,dvs-run-voltage";
203			reg = dvs->run_reg;
204			mask = dvs->run_mask;
205			break;
206		case PCA9450_DVS_LEVEL_STANDBY:
207			prop = "nxp,dvs-standby-voltage";
208			reg = dvs->standby_reg;
209			mask = dvs->standby_mask;
210			break;
211		default:
212			return -EINVAL;
213		}
214
215		ret = buck_set_dvs(desc, np, cfg->regmap, prop, reg, mask);
216		if (ret)
217			break;
218	}
219
220	return ret;
221}
222
223static const struct pca9450_regulator_desc pca9450a_regulators[] = {
224	{
225		.desc = {
226			.name = "buck1",
227			.of_match = of_match_ptr("BUCK1"),
228			.regulators_node = of_match_ptr("regulators"),
229			.id = PCA9450_BUCK1,
230			.ops = &pca9450_dvs_buck_regulator_ops,
231			.type = REGULATOR_VOLTAGE,
232			.n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
233			.linear_ranges = pca9450_dvs_buck_volts,
234			.n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
235			.vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
236			.vsel_mask = BUCK1OUT_DVS0_MASK,
237			.enable_reg = PCA9450_REG_BUCK1CTRL,
238			.enable_mask = BUCK1_ENMODE_MASK,
239			.ramp_reg = PCA9450_REG_BUCK1CTRL,
240			.ramp_mask = BUCK1_RAMP_MASK,
241			.ramp_delay_table = pca9450_dvs_buck_ramp_table,
242			.n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
243			.owner = THIS_MODULE,
244			.of_parse_cb = pca9450_set_dvs_levels,
245		},
246		.dvs = {
247			.run_reg = PCA9450_REG_BUCK1OUT_DVS0,
248			.run_mask = BUCK1OUT_DVS0_MASK,
249			.standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
250			.standby_mask = BUCK1OUT_DVS1_MASK,
251		},
252	},
253	{
254		.desc = {
255			.name = "buck2",
256			.of_match = of_match_ptr("BUCK2"),
257			.regulators_node = of_match_ptr("regulators"),
258			.id = PCA9450_BUCK2,
259			.ops = &pca9450_dvs_buck_regulator_ops,
260			.type = REGULATOR_VOLTAGE,
261			.n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
262			.linear_ranges = pca9450_dvs_buck_volts,
263			.n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
264			.vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
265			.vsel_mask = BUCK2OUT_DVS0_MASK,
266			.enable_reg = PCA9450_REG_BUCK2CTRL,
267			.enable_mask = BUCK1_ENMODE_MASK,
268			.ramp_reg = PCA9450_REG_BUCK2CTRL,
269			.ramp_mask = BUCK2_RAMP_MASK,
270			.ramp_delay_table = pca9450_dvs_buck_ramp_table,
271			.n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
272			.owner = THIS_MODULE,
273			.of_parse_cb = pca9450_set_dvs_levels,
274		},
275		.dvs = {
276			.run_reg = PCA9450_REG_BUCK2OUT_DVS0,
277			.run_mask = BUCK2OUT_DVS0_MASK,
278			.standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
279			.standby_mask = BUCK2OUT_DVS1_MASK,
280		},
281	},
282	{
283		.desc = {
284			.name = "buck3",
285			.of_match = of_match_ptr("BUCK3"),
286			.regulators_node = of_match_ptr("regulators"),
287			.id = PCA9450_BUCK3,
288			.ops = &pca9450_dvs_buck_regulator_ops,
289			.type = REGULATOR_VOLTAGE,
290			.n_voltages = PCA9450_BUCK3_VOLTAGE_NUM,
291			.linear_ranges = pca9450_dvs_buck_volts,
292			.n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
293			.vsel_reg = PCA9450_REG_BUCK3OUT_DVS0,
294			.vsel_mask = BUCK3OUT_DVS0_MASK,
295			.enable_reg = PCA9450_REG_BUCK3CTRL,
296			.enable_mask = BUCK3_ENMODE_MASK,
297			.ramp_reg = PCA9450_REG_BUCK3CTRL,
298			.ramp_mask = BUCK3_RAMP_MASK,
299			.ramp_delay_table = pca9450_dvs_buck_ramp_table,
300			.n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
301			.owner = THIS_MODULE,
302			.of_parse_cb = pca9450_set_dvs_levels,
303		},
304		.dvs = {
305			.run_reg = PCA9450_REG_BUCK3OUT_DVS0,
306			.run_mask = BUCK3OUT_DVS0_MASK,
307			.standby_reg = PCA9450_REG_BUCK3OUT_DVS1,
308			.standby_mask = BUCK3OUT_DVS1_MASK,
309		},
310	},
311	{
312		.desc = {
313			.name = "buck4",
314			.of_match = of_match_ptr("BUCK4"),
315			.regulators_node = of_match_ptr("regulators"),
316			.id = PCA9450_BUCK4,
317			.ops = &pca9450_buck_regulator_ops,
318			.type = REGULATOR_VOLTAGE,
319			.n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
320			.linear_ranges = pca9450_buck_volts,
321			.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
322			.vsel_reg = PCA9450_REG_BUCK4OUT,
323			.vsel_mask = BUCK4OUT_MASK,
324			.enable_reg = PCA9450_REG_BUCK4CTRL,
325			.enable_mask = BUCK4_ENMODE_MASK,
326			.owner = THIS_MODULE,
327		},
328	},
329	{
330		.desc = {
331			.name = "buck5",
332			.of_match = of_match_ptr("BUCK5"),
333			.regulators_node = of_match_ptr("regulators"),
334			.id = PCA9450_BUCK5,
335			.ops = &pca9450_buck_regulator_ops,
336			.type = REGULATOR_VOLTAGE,
337			.n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
338			.linear_ranges = pca9450_buck_volts,
339			.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
340			.vsel_reg = PCA9450_REG_BUCK5OUT,
341			.vsel_mask = BUCK5OUT_MASK,
342			.enable_reg = PCA9450_REG_BUCK5CTRL,
343			.enable_mask = BUCK5_ENMODE_MASK,
344			.owner = THIS_MODULE,
345		},
346	},
347	{
348		.desc = {
349			.name = "buck6",
350			.of_match = of_match_ptr("BUCK6"),
351			.regulators_node = of_match_ptr("regulators"),
352			.id = PCA9450_BUCK6,
353			.ops = &pca9450_buck_regulator_ops,
354			.type = REGULATOR_VOLTAGE,
355			.n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
356			.linear_ranges = pca9450_buck_volts,
357			.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
358			.vsel_reg = PCA9450_REG_BUCK6OUT,
359			.vsel_mask = BUCK6OUT_MASK,
360			.enable_reg = PCA9450_REG_BUCK6CTRL,
361			.enable_mask = BUCK6_ENMODE_MASK,
362			.owner = THIS_MODULE,
363		},
364	},
365	{
366		.desc = {
367			.name = "ldo1",
368			.of_match = of_match_ptr("LDO1"),
369			.regulators_node = of_match_ptr("regulators"),
370			.id = PCA9450_LDO1,
371			.ops = &pca9450_ldo_regulator_ops,
372			.type = REGULATOR_VOLTAGE,
373			.n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
374			.linear_ranges = pca9450_ldo1_volts,
375			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
376			.vsel_reg = PCA9450_REG_LDO1CTRL,
377			.vsel_mask = LDO1OUT_MASK,
378			.enable_reg = PCA9450_REG_LDO1CTRL,
379			.enable_mask = LDO1_EN_MASK,
380			.owner = THIS_MODULE,
381		},
382	},
383	{
384		.desc = {
385			.name = "ldo2",
386			.of_match = of_match_ptr("LDO2"),
387			.regulators_node = of_match_ptr("regulators"),
388			.id = PCA9450_LDO2,
389			.ops = &pca9450_ldo_regulator_ops,
390			.type = REGULATOR_VOLTAGE,
391			.n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
392			.linear_ranges = pca9450_ldo2_volts,
393			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
394			.vsel_reg = PCA9450_REG_LDO2CTRL,
395			.vsel_mask = LDO2OUT_MASK,
396			.enable_reg = PCA9450_REG_LDO2CTRL,
397			.enable_mask = LDO2_EN_MASK,
398			.owner = THIS_MODULE,
399		},
400	},
401	{
402		.desc = {
403			.name = "ldo3",
404			.of_match = of_match_ptr("LDO3"),
405			.regulators_node = of_match_ptr("regulators"),
406			.id = PCA9450_LDO3,
407			.ops = &pca9450_ldo_regulator_ops,
408			.type = REGULATOR_VOLTAGE,
409			.n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
410			.linear_ranges = pca9450_ldo34_volts,
411			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
412			.vsel_reg = PCA9450_REG_LDO3CTRL,
413			.vsel_mask = LDO3OUT_MASK,
414			.enable_reg = PCA9450_REG_LDO3CTRL,
415			.enable_mask = LDO3_EN_MASK,
416			.owner = THIS_MODULE,
417		},
418	},
419	{
420		.desc = {
421			.name = "ldo4",
422			.of_match = of_match_ptr("LDO4"),
423			.regulators_node = of_match_ptr("regulators"),
424			.id = PCA9450_LDO4,
425			.ops = &pca9450_ldo_regulator_ops,
426			.type = REGULATOR_VOLTAGE,
427			.n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
428			.linear_ranges = pca9450_ldo34_volts,
429			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
430			.vsel_reg = PCA9450_REG_LDO4CTRL,
431			.vsel_mask = LDO4OUT_MASK,
432			.enable_reg = PCA9450_REG_LDO4CTRL,
433			.enable_mask = LDO4_EN_MASK,
434			.owner = THIS_MODULE,
435		},
436	},
437	{
438		.desc = {
439			.name = "ldo5",
440			.of_match = of_match_ptr("LDO5"),
441			.regulators_node = of_match_ptr("regulators"),
442			.id = PCA9450_LDO5,
443			.ops = &pca9450_ldo_regulator_ops,
444			.type = REGULATOR_VOLTAGE,
445			.n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
446			.linear_ranges = pca9450_ldo5_volts,
447			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
448			.vsel_reg = PCA9450_REG_LDO5CTRL_H,
449			.vsel_mask = LDO5HOUT_MASK,
450			.enable_reg = PCA9450_REG_LDO5CTRL_H,
451			.enable_mask = LDO5H_EN_MASK,
452			.owner = THIS_MODULE,
453		},
454	},
455};
456
457/*
458 * Buck3 removed on PCA9450B and connected with Buck1 internal for dual phase
459 * on PCA9450C as no Buck3.
460 */
461static const struct pca9450_regulator_desc pca9450bc_regulators[] = {
462	{
463		.desc = {
464			.name = "buck1",
465			.of_match = of_match_ptr("BUCK1"),
466			.regulators_node = of_match_ptr("regulators"),
467			.id = PCA9450_BUCK1,
468			.ops = &pca9450_dvs_buck_regulator_ops,
469			.type = REGULATOR_VOLTAGE,
470			.n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
471			.linear_ranges = pca9450_dvs_buck_volts,
472			.n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
473			.vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
474			.vsel_mask = BUCK1OUT_DVS0_MASK,
475			.enable_reg = PCA9450_REG_BUCK1CTRL,
476			.enable_mask = BUCK1_ENMODE_MASK,
477			.ramp_reg = PCA9450_REG_BUCK1CTRL,
478			.ramp_mask = BUCK1_RAMP_MASK,
479			.ramp_delay_table = pca9450_dvs_buck_ramp_table,
480			.n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
481			.owner = THIS_MODULE,
482			.of_parse_cb = pca9450_set_dvs_levels,
483		},
484		.dvs = {
485			.run_reg = PCA9450_REG_BUCK1OUT_DVS0,
486			.run_mask = BUCK1OUT_DVS0_MASK,
487			.standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
488			.standby_mask = BUCK1OUT_DVS1_MASK,
489		},
490	},
491	{
492		.desc = {
493			.name = "buck2",
494			.of_match = of_match_ptr("BUCK2"),
495			.regulators_node = of_match_ptr("regulators"),
496			.id = PCA9450_BUCK2,
497			.ops = &pca9450_dvs_buck_regulator_ops,
498			.type = REGULATOR_VOLTAGE,
499			.n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
500			.linear_ranges = pca9450_dvs_buck_volts,
501			.n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
502			.vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
503			.vsel_mask = BUCK2OUT_DVS0_MASK,
504			.enable_reg = PCA9450_REG_BUCK2CTRL,
505			.enable_mask = BUCK1_ENMODE_MASK,
506			.ramp_reg = PCA9450_REG_BUCK2CTRL,
507			.ramp_mask = BUCK2_RAMP_MASK,
508			.ramp_delay_table = pca9450_dvs_buck_ramp_table,
509			.n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
510			.owner = THIS_MODULE,
511			.of_parse_cb = pca9450_set_dvs_levels,
512		},
513		.dvs = {
514			.run_reg = PCA9450_REG_BUCK2OUT_DVS0,
515			.run_mask = BUCK2OUT_DVS0_MASK,
516			.standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
517			.standby_mask = BUCK2OUT_DVS1_MASK,
518		},
519	},
520	{
521		.desc = {
522			.name = "buck4",
523			.of_match = of_match_ptr("BUCK4"),
524			.regulators_node = of_match_ptr("regulators"),
525			.id = PCA9450_BUCK4,
526			.ops = &pca9450_buck_regulator_ops,
527			.type = REGULATOR_VOLTAGE,
528			.n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
529			.linear_ranges = pca9450_buck_volts,
530			.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
531			.vsel_reg = PCA9450_REG_BUCK4OUT,
532			.vsel_mask = BUCK4OUT_MASK,
533			.enable_reg = PCA9450_REG_BUCK4CTRL,
534			.enable_mask = BUCK4_ENMODE_MASK,
535			.owner = THIS_MODULE,
536		},
537	},
538	{
539		.desc = {
540			.name = "buck5",
541			.of_match = of_match_ptr("BUCK5"),
542			.regulators_node = of_match_ptr("regulators"),
543			.id = PCA9450_BUCK5,
544			.ops = &pca9450_buck_regulator_ops,
545			.type = REGULATOR_VOLTAGE,
546			.n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
547			.linear_ranges = pca9450_buck_volts,
548			.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
549			.vsel_reg = PCA9450_REG_BUCK5OUT,
550			.vsel_mask = BUCK5OUT_MASK,
551			.enable_reg = PCA9450_REG_BUCK5CTRL,
552			.enable_mask = BUCK5_ENMODE_MASK,
553			.owner = THIS_MODULE,
554		},
555	},
556	{
557		.desc = {
558			.name = "buck6",
559			.of_match = of_match_ptr("BUCK6"),
560			.regulators_node = of_match_ptr("regulators"),
561			.id = PCA9450_BUCK6,
562			.ops = &pca9450_buck_regulator_ops,
563			.type = REGULATOR_VOLTAGE,
564			.n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
565			.linear_ranges = pca9450_buck_volts,
566			.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
567			.vsel_reg = PCA9450_REG_BUCK6OUT,
568			.vsel_mask = BUCK6OUT_MASK,
569			.enable_reg = PCA9450_REG_BUCK6CTRL,
570			.enable_mask = BUCK6_ENMODE_MASK,
571			.owner = THIS_MODULE,
572		},
573	},
574	{
575		.desc = {
576			.name = "ldo1",
577			.of_match = of_match_ptr("LDO1"),
578			.regulators_node = of_match_ptr("regulators"),
579			.id = PCA9450_LDO1,
580			.ops = &pca9450_ldo_regulator_ops,
581			.type = REGULATOR_VOLTAGE,
582			.n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
583			.linear_ranges = pca9450_ldo1_volts,
584			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
585			.vsel_reg = PCA9450_REG_LDO1CTRL,
586			.vsel_mask = LDO1OUT_MASK,
587			.enable_reg = PCA9450_REG_LDO1CTRL,
588			.enable_mask = LDO1_EN_MASK,
589			.owner = THIS_MODULE,
590		},
591	},
592	{
593		.desc = {
594			.name = "ldo2",
595			.of_match = of_match_ptr("LDO2"),
596			.regulators_node = of_match_ptr("regulators"),
597			.id = PCA9450_LDO2,
598			.ops = &pca9450_ldo_regulator_ops,
599			.type = REGULATOR_VOLTAGE,
600			.n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
601			.linear_ranges = pca9450_ldo2_volts,
602			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
603			.vsel_reg = PCA9450_REG_LDO2CTRL,
604			.vsel_mask = LDO2OUT_MASK,
605			.enable_reg = PCA9450_REG_LDO2CTRL,
606			.enable_mask = LDO2_EN_MASK,
607			.owner = THIS_MODULE,
608		},
609	},
610	{
611		.desc = {
612			.name = "ldo3",
613			.of_match = of_match_ptr("LDO3"),
614			.regulators_node = of_match_ptr("regulators"),
615			.id = PCA9450_LDO3,
616			.ops = &pca9450_ldo_regulator_ops,
617			.type = REGULATOR_VOLTAGE,
618			.n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
619			.linear_ranges = pca9450_ldo34_volts,
620			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
621			.vsel_reg = PCA9450_REG_LDO3CTRL,
622			.vsel_mask = LDO3OUT_MASK,
623			.enable_reg = PCA9450_REG_LDO3CTRL,
624			.enable_mask = LDO3_EN_MASK,
625			.owner = THIS_MODULE,
626		},
627	},
628	{
629		.desc = {
630			.name = "ldo4",
631			.of_match = of_match_ptr("LDO4"),
632			.regulators_node = of_match_ptr("regulators"),
633			.id = PCA9450_LDO4,
634			.ops = &pca9450_ldo_regulator_ops,
635			.type = REGULATOR_VOLTAGE,
636			.n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
637			.linear_ranges = pca9450_ldo34_volts,
638			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
639			.vsel_reg = PCA9450_REG_LDO4CTRL,
640			.vsel_mask = LDO4OUT_MASK,
641			.enable_reg = PCA9450_REG_LDO4CTRL,
642			.enable_mask = LDO4_EN_MASK,
643			.owner = THIS_MODULE,
644		},
645	},
646	{
647		.desc = {
648			.name = "ldo5",
649			.of_match = of_match_ptr("LDO5"),
650			.regulators_node = of_match_ptr("regulators"),
651			.id = PCA9450_LDO5,
652			.ops = &pca9450_ldo_regulator_ops,
653			.type = REGULATOR_VOLTAGE,
654			.n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
655			.linear_ranges = pca9450_ldo5_volts,
656			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
657			.vsel_reg = PCA9450_REG_LDO5CTRL_H,
658			.vsel_mask = LDO5HOUT_MASK,
659			.enable_reg = PCA9450_REG_LDO5CTRL_H,
660			.enable_mask = LDO5H_EN_MASK,
661			.owner = THIS_MODULE,
662		},
663	},
664};
665
666static irqreturn_t pca9450_irq_handler(int irq, void *data)
667{
668	struct pca9450 *pca9450 = data;
669	struct regmap *regmap = pca9450->regmap;
670	unsigned int status;
671	int ret;
672
673	ret = regmap_read(regmap, PCA9450_REG_INT1, &status);
674	if (ret < 0) {
675		dev_err(pca9450->dev,
676			"Failed to read INT1(%d)\n", ret);
677		return IRQ_NONE;
678	}
679
680	if (status & IRQ_PWRON)
681		dev_warn(pca9450->dev, "PWRON interrupt.\n");
682
683	if (status & IRQ_WDOGB)
684		dev_warn(pca9450->dev, "WDOGB interrupt.\n");
685
686	if (status & IRQ_VR_FLT1)
687		dev_warn(pca9450->dev, "VRFLT1 interrupt.\n");
688
689	if (status & IRQ_VR_FLT2)
690		dev_warn(pca9450->dev, "VRFLT2 interrupt.\n");
691
692	if (status & IRQ_LOWVSYS)
693		dev_warn(pca9450->dev, "LOWVSYS interrupt.\n");
694
695	if (status & IRQ_THERM_105)
696		dev_warn(pca9450->dev, "IRQ_THERM_105 interrupt.\n");
697
698	if (status & IRQ_THERM_125)
699		dev_warn(pca9450->dev, "IRQ_THERM_125 interrupt.\n");
700
701	return IRQ_HANDLED;
702}
703
704static int pca9450_i2c_probe(struct i2c_client *i2c)
705{
706	enum pca9450_chip_type type = (unsigned int)(uintptr_t)
707				      of_device_get_match_data(&i2c->dev);
708	const struct pca9450_regulator_desc	*regulator_desc;
709	struct regulator_config config = { };
710	struct pca9450 *pca9450;
711	unsigned int device_id, i;
712	unsigned int reset_ctrl;
713	int ret;
714
715	if (!i2c->irq) {
716		dev_err(&i2c->dev, "No IRQ configured?\n");
717		return -EINVAL;
718	}
719
720	pca9450 = devm_kzalloc(&i2c->dev, sizeof(struct pca9450), GFP_KERNEL);
721	if (!pca9450)
722		return -ENOMEM;
723
724	switch (type) {
725	case PCA9450_TYPE_PCA9450A:
726		regulator_desc = pca9450a_regulators;
727		pca9450->rcnt = ARRAY_SIZE(pca9450a_regulators);
728		break;
729	case PCA9450_TYPE_PCA9450BC:
730		regulator_desc = pca9450bc_regulators;
731		pca9450->rcnt = ARRAY_SIZE(pca9450bc_regulators);
732		break;
733	default:
734		dev_err(&i2c->dev, "Unknown device type");
735		return -EINVAL;
736	}
737
738	pca9450->irq = i2c->irq;
739	pca9450->type = type;
740	pca9450->dev = &i2c->dev;
741
742	dev_set_drvdata(&i2c->dev, pca9450);
743
744	pca9450->regmap = devm_regmap_init_i2c(i2c,
745					       &pca9450_regmap_config);
746	if (IS_ERR(pca9450->regmap)) {
747		dev_err(&i2c->dev, "regmap initialization failed\n");
748		return PTR_ERR(pca9450->regmap);
749	}
750
751	ret = regmap_read(pca9450->regmap, PCA9450_REG_DEV_ID, &device_id);
752	if (ret) {
753		dev_err(&i2c->dev, "Read device id error\n");
754		return ret;
755	}
756
757	/* Check your board and dts for match the right pmic */
758	if (((device_id >> 4) != 0x1 && type == PCA9450_TYPE_PCA9450A) ||
759	    ((device_id >> 4) != 0x3 && type == PCA9450_TYPE_PCA9450BC)) {
760		dev_err(&i2c->dev, "Device id(%x) mismatched\n",
761			device_id >> 4);
762		return -EINVAL;
763	}
764
765	for (i = 0; i < pca9450->rcnt; i++) {
766		const struct regulator_desc *desc;
767		struct regulator_dev *rdev;
768		const struct pca9450_regulator_desc *r;
769
770		r = &regulator_desc[i];
771		desc = &r->desc;
772
773		config.regmap = pca9450->regmap;
774		config.dev = pca9450->dev;
775
776		rdev = devm_regulator_register(pca9450->dev, desc, &config);
777		if (IS_ERR(rdev)) {
778			ret = PTR_ERR(rdev);
779			dev_err(pca9450->dev,
780				"Failed to register regulator(%s): %d\n",
781				desc->name, ret);
782			return ret;
783		}
784	}
785
786	ret = devm_request_threaded_irq(pca9450->dev, pca9450->irq, NULL,
787					pca9450_irq_handler,
788					(IRQF_TRIGGER_FALLING | IRQF_ONESHOT),
789					"pca9450-irq", pca9450);
790	if (ret != 0) {
791		dev_err(pca9450->dev, "Failed to request IRQ: %d\n",
792			pca9450->irq);
793		return ret;
794	}
795	/* Unmask all interrupt except PWRON/WDOG/RSVD */
796	ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_INT1_MSK,
797				IRQ_VR_FLT1 | IRQ_VR_FLT2 | IRQ_LOWVSYS |
798				IRQ_THERM_105 | IRQ_THERM_125,
799				IRQ_PWRON | IRQ_WDOGB | IRQ_RSVD);
800	if (ret) {
801		dev_err(&i2c->dev, "Unmask irq error\n");
802		return ret;
803	}
804
805	/* Clear PRESET_EN bit in BUCK123_DVS to use DVS registers */
806	ret = regmap_clear_bits(pca9450->regmap, PCA9450_REG_BUCK123_DVS,
807				BUCK123_PRESET_EN);
808	if (ret) {
809		dev_err(&i2c->dev, "Failed to clear PRESET_EN bit: %d\n", ret);
810		return ret;
811	}
812
813	if (of_property_read_bool(i2c->dev.of_node, "nxp,wdog_b-warm-reset"))
814		reset_ctrl = WDOG_B_CFG_WARM;
815	else
816		reset_ctrl = WDOG_B_CFG_COLD_LDO12;
817
818	/* Set reset behavior on assertion of WDOG_B signal */
819	ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_RESET_CTRL,
820				 WDOG_B_CFG_MASK, reset_ctrl);
821	if (ret) {
822		dev_err(&i2c->dev, "Failed to set WDOG_B reset behavior\n");
823		return ret;
824	}
825
826	if (of_property_read_bool(i2c->dev.of_node, "nxp,i2c-lt-enable")) {
827		/* Enable I2C Level Translator */
828		ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_CONFIG2,
829					 I2C_LT_MASK, I2C_LT_ON_STANDBY_RUN);
830		if (ret) {
831			dev_err(&i2c->dev,
832				"Failed to enable I2C level translator\n");
833			return ret;
834		}
835	}
836
837	/*
838	 * The driver uses the LDO5CTRL_H register to control the LDO5 regulator.
839	 * This is only valid if the SD_VSEL input of the PMIC is high. Let's
840	 * check if the pin is available as GPIO and set it to high.
841	 */
842	pca9450->sd_vsel_gpio = gpiod_get_optional(pca9450->dev, "sd-vsel", GPIOD_OUT_HIGH);
843
844	if (IS_ERR(pca9450->sd_vsel_gpio)) {
845		dev_err(&i2c->dev, "Failed to get SD_VSEL GPIO\n");
846		return PTR_ERR(pca9450->sd_vsel_gpio);
847	}
848
849	dev_info(&i2c->dev, "%s probed.\n",
850		type == PCA9450_TYPE_PCA9450A ? "pca9450a" : "pca9450bc");
851
852	return 0;
853}
854
855static const struct of_device_id pca9450_of_match[] = {
856	{
857		.compatible = "nxp,pca9450a",
858		.data = (void *)PCA9450_TYPE_PCA9450A,
859	},
860	{
861		.compatible = "nxp,pca9450b",
862		.data = (void *)PCA9450_TYPE_PCA9450BC,
863	},
864	{
865		.compatible = "nxp,pca9450c",
866		.data = (void *)PCA9450_TYPE_PCA9450BC,
867	},
868	{ }
869};
870MODULE_DEVICE_TABLE(of, pca9450_of_match);
871
872static struct i2c_driver pca9450_i2c_driver = {
873	.driver = {
874		.name = "nxp-pca9450",
875		.of_match_table = pca9450_of_match,
876	},
877	.probe_new = pca9450_i2c_probe,
878};
879
880module_i2c_driver(pca9450_i2c_driver);
881
882MODULE_AUTHOR("Robin Gong <yibin.gong@nxp.com>");
883MODULE_DESCRIPTION("NXP PCA9450 Power Management IC driver");
884MODULE_LICENSE("GPL");