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/drivers/mfd/tps65910.c

http://github.com/mirrors/linux
C | 537 lines | 444 code | 67 blank | 26 comment | 37 complexity | b4ec73e0337928fec48b38d210e94492 MD5 | raw file
  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * tps65910.c  --  TI TPS6591x chip family multi-function driver
  4 *
  5 * Copyright 2010 Texas Instruments Inc.
  6 *
  7 * Author: Graeme Gregory <gg@slimlogic.co.uk>
  8 * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
  9 */
 10
 11#include <linux/init.h>
 12#include <linux/err.h>
 13#include <linux/slab.h>
 14#include <linux/i2c.h>
 15#include <linux/interrupt.h>
 16#include <linux/irq.h>
 17#include <linux/irqdomain.h>
 18#include <linux/mfd/core.h>
 19#include <linux/regmap.h>
 20#include <linux/mfd/tps65910.h>
 21#include <linux/of.h>
 22#include <linux/of_device.h>
 23
 24static struct resource rtc_resources[] = {
 25	{
 26		.start  = TPS65910_IRQ_RTC_ALARM,
 27		.end    = TPS65910_IRQ_RTC_ALARM,
 28		.flags  = IORESOURCE_IRQ,
 29	}
 30};
 31
 32static const struct mfd_cell tps65910s[] = {
 33	{
 34		.name = "tps65910-gpio",
 35	},
 36	{
 37		.name = "tps65910-pmic",
 38	},
 39	{
 40		.name = "tps65910-rtc",
 41		.num_resources = ARRAY_SIZE(rtc_resources),
 42		.resources = &rtc_resources[0],
 43	},
 44	{
 45		.name = "tps65910-power",
 46	},
 47};
 48
 49
 50static const struct regmap_irq tps65911_irqs[] = {
 51	/* INT_STS */
 52	[TPS65911_IRQ_PWRHOLD_F] = {
 53		.mask = INT_MSK_PWRHOLD_F_IT_MSK_MASK,
 54		.reg_offset = 0,
 55	},
 56	[TPS65911_IRQ_VBAT_VMHI] = {
 57		.mask = INT_MSK_VMBHI_IT_MSK_MASK,
 58		.reg_offset = 0,
 59	},
 60	[TPS65911_IRQ_PWRON] = {
 61		.mask = INT_MSK_PWRON_IT_MSK_MASK,
 62		.reg_offset = 0,
 63	},
 64	[TPS65911_IRQ_PWRON_LP] = {
 65		.mask = INT_MSK_PWRON_LP_IT_MSK_MASK,
 66		.reg_offset = 0,
 67	},
 68	[TPS65911_IRQ_PWRHOLD_R] = {
 69		.mask = INT_MSK_PWRHOLD_R_IT_MSK_MASK,
 70		.reg_offset = 0,
 71	},
 72	[TPS65911_IRQ_HOTDIE] = {
 73		.mask = INT_MSK_HOTDIE_IT_MSK_MASK,
 74		.reg_offset = 0,
 75	},
 76	[TPS65911_IRQ_RTC_ALARM] = {
 77		.mask = INT_MSK_RTC_ALARM_IT_MSK_MASK,
 78		.reg_offset = 0,
 79	},
 80	[TPS65911_IRQ_RTC_PERIOD] = {
 81		.mask = INT_MSK_RTC_PERIOD_IT_MSK_MASK,
 82		.reg_offset = 0,
 83	},
 84
 85	/* INT_STS2 */
 86	[TPS65911_IRQ_GPIO0_R] = {
 87		.mask = INT_MSK2_GPIO0_R_IT_MSK_MASK,
 88		.reg_offset = 1,
 89	},
 90	[TPS65911_IRQ_GPIO0_F] = {
 91		.mask = INT_MSK2_GPIO0_F_IT_MSK_MASK,
 92		.reg_offset = 1,
 93	},
 94	[TPS65911_IRQ_GPIO1_R] = {
 95		.mask = INT_MSK2_GPIO1_R_IT_MSK_MASK,
 96		.reg_offset = 1,
 97	},
 98	[TPS65911_IRQ_GPIO1_F] = {
 99		.mask = INT_MSK2_GPIO1_F_IT_MSK_MASK,
100		.reg_offset = 1,
101	},
102	[TPS65911_IRQ_GPIO2_R] = {
103		.mask = INT_MSK2_GPIO2_R_IT_MSK_MASK,
104		.reg_offset = 1,
105	},
106	[TPS65911_IRQ_GPIO2_F] = {
107		.mask = INT_MSK2_GPIO2_F_IT_MSK_MASK,
108		.reg_offset = 1,
109	},
110	[TPS65911_IRQ_GPIO3_R] = {
111		.mask = INT_MSK2_GPIO3_R_IT_MSK_MASK,
112		.reg_offset = 1,
113	},
114	[TPS65911_IRQ_GPIO3_F] = {
115		.mask = INT_MSK2_GPIO3_F_IT_MSK_MASK,
116		.reg_offset = 1,
117	},
118
119	/* INT_STS2 */
120	[TPS65911_IRQ_GPIO4_R] = {
121		.mask = INT_MSK3_GPIO4_R_IT_MSK_MASK,
122		.reg_offset = 2,
123	},
124	[TPS65911_IRQ_GPIO4_F] = {
125		.mask = INT_MSK3_GPIO4_F_IT_MSK_MASK,
126		.reg_offset = 2,
127	},
128	[TPS65911_IRQ_GPIO5_R] = {
129		.mask = INT_MSK3_GPIO5_R_IT_MSK_MASK,
130		.reg_offset = 2,
131	},
132	[TPS65911_IRQ_GPIO5_F] = {
133		.mask = INT_MSK3_GPIO5_F_IT_MSK_MASK,
134		.reg_offset = 2,
135	},
136	[TPS65911_IRQ_WTCHDG] = {
137		.mask = INT_MSK3_WTCHDG_IT_MSK_MASK,
138		.reg_offset = 2,
139	},
140	[TPS65911_IRQ_VMBCH2_H] = {
141		.mask = INT_MSK3_VMBCH2_H_IT_MSK_MASK,
142		.reg_offset = 2,
143	},
144	[TPS65911_IRQ_VMBCH2_L] = {
145		.mask = INT_MSK3_VMBCH2_L_IT_MSK_MASK,
146		.reg_offset = 2,
147	},
148	[TPS65911_IRQ_PWRDN] = {
149		.mask = INT_MSK3_PWRDN_IT_MSK_MASK,
150		.reg_offset = 2,
151	},
152};
153
154static const struct regmap_irq tps65910_irqs[] = {
155	/* INT_STS */
156	[TPS65910_IRQ_VBAT_VMBDCH] = {
157		.mask = TPS65910_INT_MSK_VMBDCH_IT_MSK_MASK,
158		.reg_offset = 0,
159	},
160	[TPS65910_IRQ_VBAT_VMHI] = {
161		.mask = TPS65910_INT_MSK_VMBHI_IT_MSK_MASK,
162		.reg_offset = 0,
163	},
164	[TPS65910_IRQ_PWRON] = {
165		.mask = TPS65910_INT_MSK_PWRON_IT_MSK_MASK,
166		.reg_offset = 0,
167	},
168	[TPS65910_IRQ_PWRON_LP] = {
169		.mask = TPS65910_INT_MSK_PWRON_LP_IT_MSK_MASK,
170		.reg_offset = 0,
171	},
172	[TPS65910_IRQ_PWRHOLD] = {
173		.mask = TPS65910_INT_MSK_PWRHOLD_IT_MSK_MASK,
174		.reg_offset = 0,
175	},
176	[TPS65910_IRQ_HOTDIE] = {
177		.mask = TPS65910_INT_MSK_HOTDIE_IT_MSK_MASK,
178		.reg_offset = 0,
179	},
180	[TPS65910_IRQ_RTC_ALARM] = {
181		.mask = TPS65910_INT_MSK_RTC_ALARM_IT_MSK_MASK,
182		.reg_offset = 0,
183	},
184	[TPS65910_IRQ_RTC_PERIOD] = {
185		.mask = TPS65910_INT_MSK_RTC_PERIOD_IT_MSK_MASK,
186		.reg_offset = 0,
187	},
188
189	/* INT_STS2 */
190	[TPS65910_IRQ_GPIO_R] = {
191		.mask = TPS65910_INT_MSK2_GPIO0_F_IT_MSK_MASK,
192		.reg_offset = 1,
193	},
194	[TPS65910_IRQ_GPIO_F] = {
195		.mask = TPS65910_INT_MSK2_GPIO0_R_IT_MSK_MASK,
196		.reg_offset = 1,
197	},
198};
199
200static struct regmap_irq_chip tps65911_irq_chip = {
201	.name = "tps65910",
202	.irqs = tps65911_irqs,
203	.num_irqs = ARRAY_SIZE(tps65911_irqs),
204	.num_regs = 3,
205	.irq_reg_stride = 2,
206	.status_base = TPS65910_INT_STS,
207	.mask_base = TPS65910_INT_MSK,
208	.ack_base = TPS65910_INT_STS,
209};
210
211static struct regmap_irq_chip tps65910_irq_chip = {
212	.name = "tps65910",
213	.irqs = tps65910_irqs,
214	.num_irqs = ARRAY_SIZE(tps65910_irqs),
215	.num_regs = 2,
216	.irq_reg_stride = 2,
217	.status_base = TPS65910_INT_STS,
218	.mask_base = TPS65910_INT_MSK,
219	.ack_base = TPS65910_INT_STS,
220};
221
222static int tps65910_irq_init(struct tps65910 *tps65910, int irq,
223		    struct tps65910_platform_data *pdata)
224{
225	int ret;
226	static struct regmap_irq_chip *tps6591x_irqs_chip;
227
228	if (!irq) {
229		dev_warn(tps65910->dev, "No interrupt support, no core IRQ\n");
230		return -EINVAL;
231	}
232
233	if (!pdata) {
234		dev_warn(tps65910->dev, "No interrupt support, no pdata\n");
235		return -EINVAL;
236	}
237
238	switch (tps65910_chip_id(tps65910)) {
239	case TPS65910:
240		tps6591x_irqs_chip = &tps65910_irq_chip;
241		break;
242	case TPS65911:
243		tps6591x_irqs_chip = &tps65911_irq_chip;
244		break;
245	}
246
247	tps65910->chip_irq = irq;
248	ret = devm_regmap_add_irq_chip(tps65910->dev, tps65910->regmap,
249				       tps65910->chip_irq,
250				       IRQF_ONESHOT, pdata->irq_base,
251				       tps6591x_irqs_chip, &tps65910->irq_data);
252	if (ret < 0) {
253		dev_warn(tps65910->dev, "Failed to add irq_chip %d\n", ret);
254		tps65910->chip_irq = 0;
255	}
256	return ret;
257}
258
259static bool is_volatile_reg(struct device *dev, unsigned int reg)
260{
261	struct tps65910 *tps65910 = dev_get_drvdata(dev);
262
263	/*
264	 * Caching all regulator registers.
265	 * All regualator register address range is same for
266	 * TPS65910 and TPS65911
267	 */
268	if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
269		/* Check for non-existing register */
270		if (tps65910_chip_id(tps65910) == TPS65910)
271			if ((reg == TPS65911_VDDCTRL_OP) ||
272				(reg == TPS65911_VDDCTRL_SR))
273				return true;
274		return false;
275	}
276	return true;
277}
278
279static const struct regmap_config tps65910_regmap_config = {
280	.reg_bits = 8,
281	.val_bits = 8,
282	.volatile_reg = is_volatile_reg,
283	.max_register = TPS65910_MAX_REGISTER - 1,
284	.cache_type = REGCACHE_RBTREE,
285};
286
287static int tps65910_ck32k_init(struct tps65910 *tps65910,
288					struct tps65910_board *pmic_pdata)
289{
290	int ret;
291
292	if (!pmic_pdata->en_ck32k_xtal)
293		return 0;
294
295	ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
296						DEVCTRL_CK32K_CTRL_MASK);
297	if (ret < 0) {
298		dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret);
299		return ret;
300	}
301
302	return 0;
303}
304
305static int tps65910_sleepinit(struct tps65910 *tps65910,
306		struct tps65910_board *pmic_pdata)
307{
308	struct device *dev;
309	int ret;
310
311	if (!pmic_pdata->en_dev_slp)
312		return 0;
313
314	dev = tps65910->dev;
315
316	/* enabling SLEEP device state */
317	ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
318				DEVCTRL_DEV_SLP_MASK);
319	if (ret < 0) {
320		dev_err(dev, "set dev_slp failed: %d\n", ret);
321		goto err_sleep_init;
322	}
323
324	if (pmic_pdata->slp_keepon.therm_keepon) {
325		ret = tps65910_reg_set_bits(tps65910,
326				TPS65910_SLEEP_KEEP_RES_ON,
327				SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK);
328		if (ret < 0) {
329			dev_err(dev, "set therm_keepon failed: %d\n", ret);
330			goto disable_dev_slp;
331		}
332	}
333
334	if (pmic_pdata->slp_keepon.clkout32k_keepon) {
335		ret = tps65910_reg_set_bits(tps65910,
336				TPS65910_SLEEP_KEEP_RES_ON,
337				SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK);
338		if (ret < 0) {
339			dev_err(dev, "set clkout32k_keepon failed: %d\n", ret);
340			goto disable_dev_slp;
341		}
342	}
343
344	if (pmic_pdata->slp_keepon.i2chs_keepon) {
345		ret = tps65910_reg_set_bits(tps65910,
346				TPS65910_SLEEP_KEEP_RES_ON,
347				SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK);
348		if (ret < 0) {
349			dev_err(dev, "set i2chs_keepon failed: %d\n", ret);
350			goto disable_dev_slp;
351		}
352	}
353
354	return 0;
355
356disable_dev_slp:
357	tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
358				DEVCTRL_DEV_SLP_MASK);
359
360err_sleep_init:
361	return ret;
362}
363
364#ifdef CONFIG_OF
365static const struct of_device_id tps65910_of_match[] = {
366	{ .compatible = "ti,tps65910", .data = (void *)TPS65910},
367	{ .compatible = "ti,tps65911", .data = (void *)TPS65911},
368	{ },
369};
370
371static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
372						unsigned long *chip_id)
373{
374	struct device_node *np = client->dev.of_node;
375	struct tps65910_board *board_info;
376	unsigned int prop;
377	const struct of_device_id *match;
378	int ret;
379
380	match = of_match_device(tps65910_of_match, &client->dev);
381	if (!match) {
382		dev_err(&client->dev, "Failed to find matching dt id\n");
383		return NULL;
384	}
385
386	*chip_id  = (unsigned long)match->data;
387
388	board_info = devm_kzalloc(&client->dev, sizeof(*board_info),
389			GFP_KERNEL);
390	if (!board_info)
391		return NULL;
392
393	ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop);
394	if (!ret)
395		board_info->vmbch_threshold = prop;
396
397	ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop);
398	if (!ret)
399		board_info->vmbch2_threshold = prop;
400
401	prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
402	board_info->en_ck32k_xtal = prop;
403
404	prop = of_property_read_bool(np, "ti,sleep-enable");
405	board_info->en_dev_slp = prop;
406
407	prop = of_property_read_bool(np, "ti,sleep-keep-therm");
408	board_info->slp_keepon.therm_keepon = prop;
409
410	prop = of_property_read_bool(np, "ti,sleep-keep-ck32k");
411	board_info->slp_keepon.clkout32k_keepon = prop;
412
413	prop = of_property_read_bool(np, "ti,sleep-keep-hsclk");
414	board_info->slp_keepon.i2chs_keepon = prop;
415
416	board_info->irq = client->irq;
417	board_info->irq_base = -1;
418	board_info->pm_off = of_property_read_bool(np,
419			"ti,system-power-controller");
420
421	return board_info;
422}
423#else
424static inline
425struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
426					 unsigned long *chip_id)
427{
428	return NULL;
429}
430#endif
431
432static struct i2c_client *tps65910_i2c_client;
433static void tps65910_power_off(void)
434{
435	struct tps65910 *tps65910;
436
437	tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev);
438
439	if (tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
440			DEVCTRL_PWR_OFF_MASK) < 0)
441		return;
442
443	tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
444			DEVCTRL_DEV_ON_MASK);
445}
446
447static int tps65910_i2c_probe(struct i2c_client *i2c,
448			      const struct i2c_device_id *id)
449{
450	struct tps65910 *tps65910;
451	struct tps65910_board *pmic_plat_data;
452	struct tps65910_board *of_pmic_plat_data = NULL;
453	struct tps65910_platform_data *init_data;
454	unsigned long chip_id = id->driver_data;
455	int ret;
456
457	pmic_plat_data = dev_get_platdata(&i2c->dev);
458
459	if (!pmic_plat_data && i2c->dev.of_node) {
460		pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
461		of_pmic_plat_data = pmic_plat_data;
462	}
463
464	if (!pmic_plat_data)
465		return -EINVAL;
466
467	init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
468	if (init_data == NULL)
469		return -ENOMEM;
470
471	tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
472	if (tps65910 == NULL)
473		return -ENOMEM;
474
475	tps65910->of_plat_data = of_pmic_plat_data;
476	i2c_set_clientdata(i2c, tps65910);
477	tps65910->dev = &i2c->dev;
478	tps65910->i2c_client = i2c;
479	tps65910->id = chip_id;
480
481	/* Work around silicon erratum SWCZ010: the tps65910 may miss the
482	 * first I2C transfer. So issue a dummy transfer before the first
483	 * real transfer.
484	 */
485	i2c_master_send(i2c, "", 1);
486	tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
487	if (IS_ERR(tps65910->regmap)) {
488		ret = PTR_ERR(tps65910->regmap);
489		dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
490		return ret;
491	}
492
493	init_data->irq = pmic_plat_data->irq;
494	init_data->irq_base = pmic_plat_data->irq_base;
495
496	tps65910_irq_init(tps65910, init_data->irq, init_data);
497	tps65910_ck32k_init(tps65910, pmic_plat_data);
498	tps65910_sleepinit(tps65910, pmic_plat_data);
499
500	if (pmic_plat_data->pm_off && !pm_power_off) {
501		tps65910_i2c_client = i2c;
502		pm_power_off = tps65910_power_off;
503	}
504
505	ret = devm_mfd_add_devices(tps65910->dev, -1,
506				   tps65910s, ARRAY_SIZE(tps65910s),
507				   NULL, 0,
508				   regmap_irq_get_domain(tps65910->irq_data));
509	if (ret < 0) {
510		dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
511		return ret;
512	}
513
514	return ret;
515}
516
517static const struct i2c_device_id tps65910_i2c_id[] = {
518       { "tps65910", TPS65910 },
519       { "tps65911", TPS65911 },
520       { }
521};
522
523static struct i2c_driver tps65910_i2c_driver = {
524	.driver = {
525		   .name = "tps65910",
526		   .of_match_table = of_match_ptr(tps65910_of_match),
527	},
528	.probe = tps65910_i2c_probe,
529	.id_table = tps65910_i2c_id,
530};
531
532static int __init tps65910_i2c_init(void)
533{
534	return i2c_add_driver(&tps65910_i2c_driver);
535}
536/* init early so consumer devices can complete system boot */
537subsys_initcall(tps65910_i2c_init);