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2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da 
 kernel/drivers/mfd/rn5t618.c
....@@ -1,28 +1,33 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * MFD core driver for Ricoh RN5T618 PMIC
34  *
45  * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
56  * Copyright (C) 2016 Toradex AG
6
- *
7
- * This program is free software; you can redistribute it and/or
8
- * modify it under the terms of the GNU General Public License
9
- * version 2 as published by the Free Software Foundation.
10
- *
11
- * You should have received a copy of the GNU General Public License
12
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
137  */
148 
159 #include <linux/delay.h>
1610 #include <linux/i2c.h>
11
+#include <linux/interrupt.h>
12
+#include <linux/irq.h>
1713 #include <linux/mfd/core.h>
1814 #include <linux/mfd/rn5t618.h>
1915 #include <linux/module.h>
2016 #include <linux/of_device.h>
17
+#include <linux/platform_device.h>
2118 #include <linux/reboot.h>
2219 #include <linux/regmap.h>
2320 
2421 static const struct mfd_cell rn5t618_cells[] = {
2522 	{ .name = "rn5t618-regulator" },
23
+	{ .name = "rn5t618-wdt" },
24
+};
25
+
26
+static const struct mfd_cell rc5t619_cells[] = {
27
+	{ .name = "rn5t618-adc" },
28
+	{ .name = "rn5t618-power" },
29
+	{ .name = "rn5t618-regulator" },
30
+	{ .name = "rc5t619-rtc" },
2631 	{ .name = "rn5t618-wdt" },
2732 };
2833 
....@@ -38,6 +43,11 @@
3843 	case RN5T618_IR_GPF:
3944 	case RN5T618_MON_IOIN:
4045 	case RN5T618_INTMON:
46
+	case RN5T618_RTC_CTRL1 ... RN5T618_RTC_CTRL2:
47
+	case RN5T618_RTC_SECONDS ... RN5T618_RTC_YEAR:
48
+	case RN5T618_CHGSTATE:
49
+	case RN5T618_CHGCTRL_IRR ... RN5T618_CHGERR_MONI:
50
+	case RN5T618_CONTROL ... RN5T618_CC_AVEREG0:
4151 		return true;
4252 	default:
4353 		return false;
....@@ -52,18 +62,90 @@
5262 	.cache_type	= REGCACHE_RBTREE,
5363 };
5464 
55
-static struct rn5t618 *rn5t618_pm_power_off;
65
+static const struct regmap_irq rc5t619_irqs[] = {
66
+	REGMAP_IRQ_REG(RN5T618_IRQ_SYS, 0, BIT(0)),
67
+	REGMAP_IRQ_REG(RN5T618_IRQ_DCDC, 0, BIT(1)),
68
+	REGMAP_IRQ_REG(RN5T618_IRQ_RTC, 0, BIT(2)),
69
+	REGMAP_IRQ_REG(RN5T618_IRQ_ADC, 0, BIT(3)),
70
+	REGMAP_IRQ_REG(RN5T618_IRQ_GPIO, 0, BIT(4)),
71
+	REGMAP_IRQ_REG(RN5T618_IRQ_CHG, 0, BIT(6)),
72
+};
73
+
74
+static const struct regmap_irq_chip rc5t619_irq_chip = {
75
+	.name = "rc5t619",
76
+	.irqs = rc5t619_irqs,
77
+	.num_irqs = ARRAY_SIZE(rc5t619_irqs),
78
+	.num_regs = 1,
79
+	.status_base = RN5T618_INTMON,
80
+	.mask_base = RN5T618_INTEN,
81
+	.mask_invert = true,
82
+};
83
+
84
+static struct i2c_client *rn5t618_pm_power_off;
5685 static struct notifier_block rn5t618_restart_handler;
86
+
87
+static int rn5t618_irq_init(struct rn5t618 *rn5t618)
88
+{
89
+	const struct regmap_irq_chip *irq_chip = NULL;
90
+	int ret;
91
+
92
+	if (!rn5t618->irq)
93
+		return 0;
94
+
95
+	switch (rn5t618->variant) {
96
+	case RC5T619:
97
+		irq_chip = &rc5t619_irq_chip;
98
+		break;
99
+	default:
100
+		dev_err(rn5t618->dev, "Currently no IRQ support for variant %d\n",
101
+			(int)rn5t618->variant);
102
+		return -ENOENT;
103
+	}
104
+
105
+	ret = devm_regmap_add_irq_chip(rn5t618->dev, rn5t618->regmap,
106
+				       rn5t618->irq,
107
+				       IRQF_TRIGGER_LOW | IRQF_ONESHOT,
108
+				       0, irq_chip, &rn5t618->irq_data);
109
+	if (ret)
110
+		dev_err(rn5t618->dev, "Failed to register IRQ chip\n");
111
+
112
+	return ret;
113
+}
57114 
58115 static void rn5t618_trigger_poweroff_sequence(bool repower)
59116 {
117
+	int ret;
118
+
60119 	/* disable automatic repower-on */
61
-	regmap_update_bits(rn5t618_pm_power_off->regmap, RN5T618_REPCNT,
62
-			   RN5T618_REPCNT_REPWRON,
63
-			   repower ? RN5T618_REPCNT_REPWRON : 0);
120
+	ret = i2c_smbus_read_byte_data(rn5t618_pm_power_off, RN5T618_REPCNT);
121
+	if (ret < 0)
122
+		goto err;
123
+
124
+	ret &= ~RN5T618_REPCNT_REPWRON;
125
+	if (repower)
126
+		ret |= RN5T618_REPCNT_REPWRON;
127
+
128
+	ret = i2c_smbus_write_byte_data(rn5t618_pm_power_off,
129
+					RN5T618_REPCNT, (u8)ret);
130
+	if (ret < 0)
131
+		goto err;
132
+
64133 	/* start power-off sequence */
65
-	regmap_update_bits(rn5t618_pm_power_off->regmap, RN5T618_SLPCNT,
66
-			   RN5T618_SLPCNT_SWPWROFF, RN5T618_SLPCNT_SWPWROFF);
134
+	ret = i2c_smbus_read_byte_data(rn5t618_pm_power_off, RN5T618_SLPCNT);
135
+	if (ret < 0)
136
+		goto err;
137
+
138
+	ret |= RN5T618_SLPCNT_SWPWROFF;
139
+
140
+	ret = i2c_smbus_write_byte_data(rn5t618_pm_power_off,
141
+					RN5T618_SLPCNT, (u8)ret);
142
+	if (ret < 0)
143
+		goto err;
144
+
145
+	return;
146
+
147
+err:
148
+	dev_alert(&rn5t618_pm_power_off->dev, "Failed to shutdown (err = %d)\n", ret);
67149 }
68150 
69151 static void rn5t618_power_off(void)
....@@ -93,8 +175,7 @@
93175 };
94176 MODULE_DEVICE_TABLE(of, rn5t618_of_match);
95177 
96
-static int rn5t618_i2c_probe(struct i2c_client *i2c,
97
-			     const struct i2c_device_id *id)
178
+static int rn5t618_i2c_probe(struct i2c_client *i2c)
98179 {
99180 	const struct of_device_id *of_id;
100181 	struct rn5t618 *priv;
....@@ -112,6 +193,8 @@
112193 
113194 	i2c_set_clientdata(i2c, priv);
114195 	priv->variant = (long)of_id->data;
196
+	priv->irq = i2c->irq;
197
+	priv->dev = &i2c->dev;
115198 
116199 	priv->regmap = devm_regmap_init_i2c(i2c, &rn5t618_regmap_config);
117200 	if (IS_ERR(priv->regmap)) {
....@@ -120,14 +203,22 @@
120203 		return ret;
121204 	}
122205 
123
-	ret = devm_mfd_add_devices(&i2c->dev, -1, rn5t618_cells,
124
-				   ARRAY_SIZE(rn5t618_cells), NULL, 0, NULL);
206
+	if (priv->variant == RC5T619)
207
+		ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_NONE,
208
+					   rc5t619_cells,
209
+					   ARRAY_SIZE(rc5t619_cells),
210
+					   NULL, 0, NULL);
211
+	else
212
+		ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_NONE,
213
+					   rn5t618_cells,
214
+					   ARRAY_SIZE(rn5t618_cells),
215
+					   NULL, 0, NULL);
125216 	if (ret) {
126217 		dev_err(&i2c->dev, "failed to add sub-devices: %d\n", ret);
127218 		return ret;
128219 	}
129220 
130
-	rn5t618_pm_power_off = priv;
221
+	rn5t618_pm_power_off = i2c;
131222 	if (of_device_is_system_power_controller(i2c->dev.of_node)) {
132223 		if (!pm_power_off)
133224 			pm_power_off = rn5t618_power_off;
....@@ -144,14 +235,12 @@
144235 		return ret;
145236 	}
146237 
147
-	return 0;
238
+	return rn5t618_irq_init(priv);
148239 }
149240 
150241 static int rn5t618_i2c_remove(struct i2c_client *i2c)
151242 {
152
-	struct rn5t618 *priv = i2c_get_clientdata(i2c);
153
-
154
-	if (priv == rn5t618_pm_power_off) {
243
+	if (i2c == rn5t618_pm_power_off) {
155244 		rn5t618_pm_power_off = NULL;
156245 		pm_power_off = NULL;
157246 	}
....@@ -161,19 +250,38 @@
161250 	return 0;
162251 }
163252 
164
-static const struct i2c_device_id rn5t618_i2c_id[] = {
165
-	{ }
166
-};
167
-MODULE_DEVICE_TABLE(i2c, rn5t618_i2c_id);
253
+static int __maybe_unused rn5t618_i2c_suspend(struct device *dev)
254
+{
255
+	struct rn5t618 *priv = dev_get_drvdata(dev);
256
+
257
+	if (priv->irq)
258
+		disable_irq(priv->irq);
259
+
260
+	return 0;
261
+}
262
+
263
+static int __maybe_unused rn5t618_i2c_resume(struct device *dev)
264
+{
265
+	struct rn5t618 *priv = dev_get_drvdata(dev);
266
+
267
+	if (priv->irq)
268
+		enable_irq(priv->irq);
269
+
270
+	return 0;
271
+}
272
+
273
+static SIMPLE_DEV_PM_OPS(rn5t618_i2c_dev_pm_ops,
274
+			rn5t618_i2c_suspend,
275
+			rn5t618_i2c_resume);
168276 
169277 static struct i2c_driver rn5t618_i2c_driver = {
170278 	.driver = {
171279 		.name = "rn5t618",
172280 		.of_match_table = of_match_ptr(rn5t618_of_match),
281
+		.pm = &rn5t618_i2c_dev_pm_ops,
173282 	},
174
-	.probe = rn5t618_i2c_probe,
283
+	.probe_new = rn5t618_i2c_probe,
175284 	.remove = rn5t618_i2c_remove,
176
-	.id_table = rn5t618_i2c_id,
177285 };
178286 
179287 module_i2c_driver(rn5t618_i2c_driver);