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