net: DCB: Validate DCB_ATTR_DCB_BUFFER argument
[linux/fpc-iii.git] / drivers / mfd / da9063-core.c
blobb125f90dd375d71b910fb2ee0a616cb6559542f9
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Device access for Dialog DA9063 modules
5 * Copyright 2012 Dialog Semiconductors Ltd.
6 * Copyright 2013 Philipp Zabel, Pengutronix
8 * Author: Krystian Garbaciak, Dialog Semiconductor
9 * Author: Michal Hajduk, Dialog Semiconductor
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>
24 #include <linux/mfd/da9063/core.h>
25 #include <linux/mfd/da9063/registers.h>
27 #include <linux/proc_fs.h>
28 #include <linux/kthread.h>
29 #include <linux/uaccess.h>
32 static struct resource da9063_regulators_resources[] = {
34 .name = "LDO_LIM",
35 .start = DA9063_IRQ_LDO_LIM,
36 .end = DA9063_IRQ_LDO_LIM,
37 .flags = IORESOURCE_IRQ,
41 static struct resource da9063_rtc_resources[] = {
43 .name = "ALARM",
44 .start = DA9063_IRQ_ALARM,
45 .end = DA9063_IRQ_ALARM,
46 .flags = IORESOURCE_IRQ,
49 .name = "TICK",
50 .start = DA9063_IRQ_TICK,
51 .end = DA9063_IRQ_TICK,
52 .flags = IORESOURCE_IRQ,
56 static struct resource da9063_onkey_resources[] = {
58 .name = "ONKEY",
59 .start = DA9063_IRQ_ONKEY,
60 .end = DA9063_IRQ_ONKEY,
61 .flags = IORESOURCE_IRQ,
65 static struct resource da9063_hwmon_resources[] = {
67 .start = DA9063_IRQ_ADC_RDY,
68 .end = DA9063_IRQ_ADC_RDY,
69 .flags = IORESOURCE_IRQ,
74 static const struct mfd_cell da9063_common_devs[] = {
76 .name = DA9063_DRVNAME_REGULATORS,
77 .num_resources = ARRAY_SIZE(da9063_regulators_resources),
78 .resources = da9063_regulators_resources,
81 .name = DA9063_DRVNAME_LEDS,
84 .name = DA9063_DRVNAME_WATCHDOG,
85 .of_compatible = "dlg,da9063-watchdog",
88 .name = DA9063_DRVNAME_HWMON,
89 .num_resources = ARRAY_SIZE(da9063_hwmon_resources),
90 .resources = da9063_hwmon_resources,
93 .name = DA9063_DRVNAME_ONKEY,
94 .num_resources = ARRAY_SIZE(da9063_onkey_resources),
95 .resources = da9063_onkey_resources,
96 .of_compatible = "dlg,da9063-onkey",
99 .name = DA9063_DRVNAME_VIBRATION,
103 /* Only present on DA9063 , not on DA9063L */
104 static const struct mfd_cell da9063_devs[] = {
106 .name = DA9063_DRVNAME_RTC,
107 .num_resources = ARRAY_SIZE(da9063_rtc_resources),
108 .resources = da9063_rtc_resources,
109 .of_compatible = "dlg,da9063-rtc",
113 static int da9063_clear_fault_log(struct da9063 *da9063)
115 int ret = 0;
116 int fault_log = 0;
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;
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");
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);
158 return ret;
161 int da9063_device_init(struct da9063 *da9063, unsigned int irq)
163 int model, variant_id, variant_code;
164 int ret;
166 ret = da9063_clear_fault_log(da9063);
167 if (ret < 0)
168 dev_err(da9063->dev, "Cannot clear fault log\n");
170 da9063->flags = 0;
171 da9063->irq_base = -1;
172 da9063->chip_irq = irq;
174 ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_ID, &model);
175 if (ret < 0) {
176 dev_err(da9063->dev, "Cannot read chip model id.\n");
177 return -EIO;
179 if (model != PMIC_CHIP_ID_DA9063) {
180 dev_err(da9063->dev, "Invalid chip model id: 0x%02x\n", model);
181 return -ENODEV;
184 ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_VARIANT, &variant_id);
185 if (ret < 0) {
186 dev_err(da9063->dev, "Cannot read chip variant id.\n");
187 return -EIO;
190 variant_code = variant_id >> DA9063_CHIP_VARIANT_SHIFT;
192 dev_info(da9063->dev,
193 "Device detected (chip-ID: 0x%02X, var-ID: 0x%02X)\n",
194 model, variant_id);
196 if (variant_code < PMIC_DA9063_BB && variant_code != PMIC_DA9063_AD) {
197 dev_err(da9063->dev,
198 "Cannot support variant code: 0x%02X\n", variant_code);
199 return -ENODEV;
202 da9063->variant_code = variant_code;
204 ret = da9063_irq_init(da9063);
205 if (ret) {
206 dev_err(da9063->dev, "Cannot initialize interrupts.\n");
207 return ret;
210 da9063->irq_base = regmap_irq_chip_get_base(da9063->regmap_irq);
212 ret = devm_mfd_add_devices(da9063->dev, PLATFORM_DEVID_NONE,
213 da9063_common_devs,
214 ARRAY_SIZE(da9063_common_devs),
215 NULL, da9063->irq_base, NULL);
216 if (ret) {
217 dev_err(da9063->dev, "Failed to add child devices\n");
218 return ret;
221 if (da9063->type == PMIC_TYPE_DA9063) {
222 ret = devm_mfd_add_devices(da9063->dev, PLATFORM_DEVID_NONE,
223 da9063_devs, ARRAY_SIZE(da9063_devs),
224 NULL, da9063->irq_base, NULL);
225 if (ret) {
226 dev_err(da9063->dev, "Failed to add child devices\n");
227 return ret;
231 return ret;
234 MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");
235 MODULE_AUTHOR("Krystian Garbaciak");
236 MODULE_AUTHOR("Michal Hajduk");
237 MODULE_LICENSE("GPL");