1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Device access for Dialog DA9063 modules
4  *
5  * Copyright 2012 Dialog Semiconductors Ltd.
6  * Copyright 2013 Philipp Zabel, Pengutronix
7  *
8  * Author: Krystian Garbaciak, Dialog Semiconductor
9  * Author: Michal Hajduk, Dialog Semiconductor
10  *
11  */
12 
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/slab.h>
17 #include <linux/device.h>
18 #include <linux/delay.h>
19 #include <linux/interrupt.h>
20 #include <linux/mutex.h>
21 #include <linux/mfd/core.h>
22 #include <linux/regmap.h>
23 
24 #include <linux/mfd/da9063/core.h>
25 #include <linux/mfd/da9063/registers.h>
26 
27 #include <linux/proc_fs.h>
28 #include <linux/kthread.h>
29 #include <linux/uaccess.h>
30 
31 
32 static const struct resource da9063_regulators_resources[] = {
33 	{
34 		.name	= "LDO_LIM",
35 		.start	= DA9063_IRQ_LDO_LIM,
36 		.end	= DA9063_IRQ_LDO_LIM,
37 		.flags	= IORESOURCE_IRQ,
38 	},
39 };
40 
41 static const struct resource da9063_rtc_resources[] = {
42 	{
43 		.name	= "ALARM",
44 		.start	= DA9063_IRQ_ALARM,
45 		.end	= DA9063_IRQ_ALARM,
46 		.flags	= IORESOURCE_IRQ,
47 	},
48 	{
49 		.name	= "TICK",
50 		.start	= DA9063_IRQ_TICK,
51 		.end	= DA9063_IRQ_TICK,
52 		.flags	= IORESOURCE_IRQ,
53 	}
54 };
55 
56 static const struct resource da9063_onkey_resources[] = {
57 	{
58 		.name	= "ONKEY",
59 		.start	= DA9063_IRQ_ONKEY,
60 		.end	= DA9063_IRQ_ONKEY,
61 		.flags	= IORESOURCE_IRQ,
62 	},
63 };
64 
65 static const struct resource da9063_hwmon_resources[] = {
66 	{
67 		.start	= DA9063_IRQ_ADC_RDY,
68 		.end	= DA9063_IRQ_ADC_RDY,
69 		.flags	= IORESOURCE_IRQ,
70 	},
71 };
72 
73 
74 static const struct mfd_cell da9063_common_devs[] = {
75 	{
76 		.name		= DA9063_DRVNAME_REGULATORS,
77 		.num_resources	= ARRAY_SIZE(da9063_regulators_resources),
78 		.resources	= da9063_regulators_resources,
79 	},
80 	{
81 		.name		= DA9063_DRVNAME_LEDS,
82 	},
83 	{
84 		.name		= DA9063_DRVNAME_WATCHDOG,
85 		.of_compatible	= "dlg,da9063-watchdog",
86 	},
87 	{
88 		.name		= DA9063_DRVNAME_HWMON,
89 		.num_resources	= ARRAY_SIZE(da9063_hwmon_resources),
90 		.resources	= da9063_hwmon_resources,
91 	},
92 	{
93 		.name		= DA9063_DRVNAME_ONKEY,
94 		.num_resources	= ARRAY_SIZE(da9063_onkey_resources),
95 		.resources	= da9063_onkey_resources,
96 		.of_compatible = "dlg,da9063-onkey",
97 	},
98 	{
99 		.name		= DA9063_DRVNAME_VIBRATION,
100 	},
101 };
102 
103 /* Only present on DA9063 , not on DA9063L */
104 static const struct mfd_cell da9063_devs[] = {
105 	{
106 		.name		= DA9063_DRVNAME_RTC,
107 		.num_resources	= ARRAY_SIZE(da9063_rtc_resources),
108 		.resources	= da9063_rtc_resources,
109 		.of_compatible	= "dlg,da9063-rtc",
110 	},
111 };
112 
da9063_clear_fault_log(struct da9063 * da9063)113 static int da9063_clear_fault_log(struct da9063 *da9063)
114 {
115 	int ret = 0;
116 	int fault_log = 0;
117 
118 	ret = regmap_read(da9063->regmap, DA9063_REG_FAULT_LOG, &fault_log);
119 	if (ret < 0) {
120 		dev_err(da9063->dev, "Cannot read FAULT_LOG.\n");
121 		return -EIO;
122 	}
123 
124 	if (fault_log) {
125 		if (fault_log & DA9063_TWD_ERROR)
126 			dev_dbg(da9063->dev,
127 				"Fault log entry detected: DA9063_TWD_ERROR\n");
128 		if (fault_log & DA9063_POR)
129 			dev_dbg(da9063->dev,
130 				"Fault log entry detected: DA9063_POR\n");
131 		if (fault_log & DA9063_VDD_FAULT)
132 			dev_dbg(da9063->dev,
133 				"Fault log entry detected: DA9063_VDD_FAULT\n");
134 		if (fault_log & DA9063_VDD_START)
135 			dev_dbg(da9063->dev,
136 				"Fault log entry detected: DA9063_VDD_START\n");
137 		if (fault_log & DA9063_TEMP_CRIT)
138 			dev_dbg(da9063->dev,
139 				"Fault log entry detected: DA9063_TEMP_CRIT\n");
140 		if (fault_log & DA9063_KEY_RESET)
141 			dev_dbg(da9063->dev,
142 				"Fault log entry detected: DA9063_KEY_RESET\n");
143 		if (fault_log & DA9063_NSHUTDOWN)
144 			dev_dbg(da9063->dev,
145 				"Fault log entry detected: DA9063_NSHUTDOWN\n");
146 		if (fault_log & DA9063_WAIT_SHUT)
147 			dev_dbg(da9063->dev,
148 				"Fault log entry detected: DA9063_WAIT_SHUT\n");
149 	}
150 
151 	ret = regmap_write(da9063->regmap,
152 			   DA9063_REG_FAULT_LOG,
153 			   fault_log);
154 	if (ret < 0)
155 		dev_err(da9063->dev,
156 			"Cannot reset FAULT_LOG values %d\n", ret);
157 
158 	return ret;
159 }
160 
da9063_device_init(struct da9063 * da9063,unsigned int irq)161 int da9063_device_init(struct da9063 *da9063, unsigned int irq)
162 {
163 	int ret;
164 
165 	ret = da9063_clear_fault_log(da9063);
166 	if (ret < 0)
167 		dev_err(da9063->dev, "Cannot clear fault log\n");
168 
169 	da9063->flags = 0;
170 	da9063->irq_base = -1;
171 	da9063->chip_irq = irq;
172 
173 	ret = da9063_irq_init(da9063);
174 	if (ret) {
175 		dev_err(da9063->dev, "Cannot initialize interrupts.\n");
176 		return ret;
177 	}
178 
179 	da9063->irq_base = regmap_irq_chip_get_base(da9063->regmap_irq);
180 
181 	ret = devm_mfd_add_devices(da9063->dev, PLATFORM_DEVID_NONE,
182 				   da9063_common_devs,
183 				   ARRAY_SIZE(da9063_common_devs),
184 				   NULL, da9063->irq_base, NULL);
185 	if (ret) {
186 		dev_err(da9063->dev, "Failed to add child devices\n");
187 		return ret;
188 	}
189 
190 	if (da9063->type == PMIC_TYPE_DA9063) {
191 		ret = devm_mfd_add_devices(da9063->dev, PLATFORM_DEVID_NONE,
192 					   da9063_devs, ARRAY_SIZE(da9063_devs),
193 					   NULL, da9063->irq_base, NULL);
194 		if (ret) {
195 			dev_err(da9063->dev, "Failed to add child devices\n");
196 			return ret;
197 		}
198 	}
199 
200 	return ret;
201 }
202 
203 MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");
204 MODULE_AUTHOR("Krystian Garbaciak");
205 MODULE_AUTHOR("Michal Hajduk");
206 MODULE_LICENSE("GPL");
207