Commit | Line | Data |
---|---|---|
51908d2e PPL |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // Copyright (C) STMicroelectronics 2018 | |
3 | // Author: Pascal Paillet <p.paillet@st.com> | |
4 | ||
5 | #include <linux/i2c.h> | |
6 | #include <linux/interrupt.h> | |
7 | #include <linux/mfd/core.h> | |
8 | #include <linux/mfd/stpmic1.h> | |
9 | #include <linux/module.h> | |
6e9df38f | 10 | #include <linux/reboot.h> |
51908d2e PPL |
11 | #include <linux/of.h> |
12 | #include <linux/of_irq.h> | |
13 | #include <linux/of_platform.h> | |
14 | #include <linux/pm_wakeirq.h> | |
15 | #include <linux/regmap.h> | |
16 | ||
17 | #include <dt-bindings/mfd/st,stpmic1.h> | |
18 | ||
19 | #define STPMIC1_MAIN_IRQ 0 | |
20 | ||
21 | static const struct regmap_range stpmic1_readable_ranges[] = { | |
22 | regmap_reg_range(TURN_ON_SR, VERSION_SR), | |
48b4371b | 23 | regmap_reg_range(MAIN_CR, LDO6_STDBY_CR), |
51908d2e PPL |
24 | regmap_reg_range(BST_SW_CR, BST_SW_CR), |
25 | regmap_reg_range(INT_PENDING_R1, INT_PENDING_R4), | |
26 | regmap_reg_range(INT_CLEAR_R1, INT_CLEAR_R4), | |
27 | regmap_reg_range(INT_MASK_R1, INT_MASK_R4), | |
28 | regmap_reg_range(INT_SET_MASK_R1, INT_SET_MASK_R4), | |
29 | regmap_reg_range(INT_CLEAR_MASK_R1, INT_CLEAR_MASK_R4), | |
30 | regmap_reg_range(INT_SRC_R1, INT_SRC_R1), | |
31 | }; | |
32 | ||
33 | static const struct regmap_range stpmic1_writeable_ranges[] = { | |
48b4371b | 34 | regmap_reg_range(MAIN_CR, LDO6_STDBY_CR), |
51908d2e PPL |
35 | regmap_reg_range(BST_SW_CR, BST_SW_CR), |
36 | regmap_reg_range(INT_CLEAR_R1, INT_CLEAR_R4), | |
37 | regmap_reg_range(INT_SET_MASK_R1, INT_SET_MASK_R4), | |
38 | regmap_reg_range(INT_CLEAR_MASK_R1, INT_CLEAR_MASK_R4), | |
39 | }; | |
40 | ||
41 | static const struct regmap_range stpmic1_volatile_ranges[] = { | |
42 | regmap_reg_range(TURN_ON_SR, VERSION_SR), | |
43 | regmap_reg_range(WCHDG_CR, WCHDG_CR), | |
44 | regmap_reg_range(INT_PENDING_R1, INT_PENDING_R4), | |
45 | regmap_reg_range(INT_SRC_R1, INT_SRC_R4), | |
46 | }; | |
47 | ||
48 | static const struct regmap_access_table stpmic1_readable_table = { | |
49 | .yes_ranges = stpmic1_readable_ranges, | |
50 | .n_yes_ranges = ARRAY_SIZE(stpmic1_readable_ranges), | |
51 | }; | |
52 | ||
53 | static const struct regmap_access_table stpmic1_writeable_table = { | |
54 | .yes_ranges = stpmic1_writeable_ranges, | |
55 | .n_yes_ranges = ARRAY_SIZE(stpmic1_writeable_ranges), | |
56 | }; | |
57 | ||
58 | static const struct regmap_access_table stpmic1_volatile_table = { | |
59 | .yes_ranges = stpmic1_volatile_ranges, | |
60 | .n_yes_ranges = ARRAY_SIZE(stpmic1_volatile_ranges), | |
61 | }; | |
62 | ||
0c09e712 | 63 | static const struct regmap_config stpmic1_regmap_config = { |
51908d2e PPL |
64 | .reg_bits = 8, |
65 | .val_bits = 8, | |
66 | .cache_type = REGCACHE_RBTREE, | |
67 | .max_register = PMIC_MAX_REGISTER_ADDRESS, | |
68 | .rd_table = &stpmic1_readable_table, | |
69 | .wr_table = &stpmic1_writeable_table, | |
70 | .volatile_table = &stpmic1_volatile_table, | |
71 | }; | |
72 | ||
73 | static const struct regmap_irq stpmic1_irqs[] = { | |
74 | REGMAP_IRQ_REG(IT_PONKEY_F, 0, 0x01), | |
75 | REGMAP_IRQ_REG(IT_PONKEY_R, 0, 0x02), | |
76 | REGMAP_IRQ_REG(IT_WAKEUP_F, 0, 0x04), | |
77 | REGMAP_IRQ_REG(IT_WAKEUP_R, 0, 0x08), | |
78 | REGMAP_IRQ_REG(IT_VBUS_OTG_F, 0, 0x10), | |
79 | REGMAP_IRQ_REG(IT_VBUS_OTG_R, 0, 0x20), | |
80 | REGMAP_IRQ_REG(IT_SWOUT_F, 0, 0x40), | |
81 | REGMAP_IRQ_REG(IT_SWOUT_R, 0, 0x80), | |
82 | ||
83 | REGMAP_IRQ_REG(IT_CURLIM_BUCK1, 1, 0x01), | |
84 | REGMAP_IRQ_REG(IT_CURLIM_BUCK2, 1, 0x02), | |
85 | REGMAP_IRQ_REG(IT_CURLIM_BUCK3, 1, 0x04), | |
86 | REGMAP_IRQ_REG(IT_CURLIM_BUCK4, 1, 0x08), | |
87 | REGMAP_IRQ_REG(IT_OCP_OTG, 1, 0x10), | |
88 | REGMAP_IRQ_REG(IT_OCP_SWOUT, 1, 0x20), | |
89 | REGMAP_IRQ_REG(IT_OCP_BOOST, 1, 0x40), | |
90 | REGMAP_IRQ_REG(IT_OVP_BOOST, 1, 0x80), | |
91 | ||
92 | REGMAP_IRQ_REG(IT_CURLIM_LDO1, 2, 0x01), | |
93 | REGMAP_IRQ_REG(IT_CURLIM_LDO2, 2, 0x02), | |
94 | REGMAP_IRQ_REG(IT_CURLIM_LDO3, 2, 0x04), | |
95 | REGMAP_IRQ_REG(IT_CURLIM_LDO4, 2, 0x08), | |
96 | REGMAP_IRQ_REG(IT_CURLIM_LDO5, 2, 0x10), | |
97 | REGMAP_IRQ_REG(IT_CURLIM_LDO6, 2, 0x20), | |
98 | REGMAP_IRQ_REG(IT_SHORT_SWOTG, 2, 0x40), | |
99 | REGMAP_IRQ_REG(IT_SHORT_SWOUT, 2, 0x80), | |
100 | ||
101 | REGMAP_IRQ_REG(IT_TWARN_F, 3, 0x01), | |
102 | REGMAP_IRQ_REG(IT_TWARN_R, 3, 0x02), | |
103 | REGMAP_IRQ_REG(IT_VINLOW_F, 3, 0x04), | |
104 | REGMAP_IRQ_REG(IT_VINLOW_R, 3, 0x08), | |
105 | REGMAP_IRQ_REG(IT_SWIN_F, 3, 0x40), | |
106 | REGMAP_IRQ_REG(IT_SWIN_R, 3, 0x80), | |
107 | }; | |
108 | ||
109 | static const struct regmap_irq_chip stpmic1_regmap_irq_chip = { | |
110 | .name = "pmic_irq", | |
111 | .status_base = INT_PENDING_R1, | |
c79e3873 AM |
112 | .mask_base = INT_SET_MASK_R1, |
113 | .unmask_base = INT_CLEAR_MASK_R1, | |
114 | .mask_unmask_non_inverted = true, | |
51908d2e PPL |
115 | .ack_base = INT_CLEAR_R1, |
116 | .num_regs = STPMIC1_PMIC_NUM_IRQ_REGS, | |
117 | .irqs = stpmic1_irqs, | |
118 | .num_irqs = ARRAY_SIZE(stpmic1_irqs), | |
119 | }; | |
120 | ||
6e9df38f SN |
121 | static int stpmic1_power_off(struct sys_off_data *data) |
122 | { | |
123 | struct stpmic1 *ddata = data->cb_data; | |
124 | ||
125 | regmap_update_bits(ddata->regmap, MAIN_CR, | |
126 | SOFTWARE_SWITCH_OFF, SOFTWARE_SWITCH_OFF); | |
127 | ||
128 | return NOTIFY_DONE; | |
129 | } | |
130 | ||
39cabdc8 | 131 | static int stpmic1_probe(struct i2c_client *i2c) |
51908d2e PPL |
132 | { |
133 | struct stpmic1 *ddata; | |
134 | struct device *dev = &i2c->dev; | |
135 | int ret; | |
136 | struct device_node *np = dev->of_node; | |
137 | u32 reg; | |
138 | ||
139 | ddata = devm_kzalloc(dev, sizeof(struct stpmic1), GFP_KERNEL); | |
140 | if (!ddata) | |
141 | return -ENOMEM; | |
142 | ||
143 | i2c_set_clientdata(i2c, ddata); | |
144 | ddata->dev = dev; | |
145 | ||
146 | ddata->regmap = devm_regmap_init_i2c(i2c, &stpmic1_regmap_config); | |
147 | if (IS_ERR(ddata->regmap)) | |
148 | return PTR_ERR(ddata->regmap); | |
149 | ||
150 | ddata->irq = of_irq_get(np, STPMIC1_MAIN_IRQ); | |
151 | if (ddata->irq < 0) { | |
152 | dev_err(dev, "Failed to get main IRQ: %d\n", ddata->irq); | |
153 | return ddata->irq; | |
154 | } | |
155 | ||
156 | ret = regmap_read(ddata->regmap, VERSION_SR, ®); | |
157 | if (ret) { | |
158 | dev_err(dev, "Unable to read PMIC version\n"); | |
159 | return ret; | |
160 | } | |
161 | dev_info(dev, "PMIC Chip Version: 0x%x\n", reg); | |
162 | ||
163 | /* Initialize PMIC IRQ Chip & associated IRQ domains */ | |
164 | ret = devm_regmap_add_irq_chip(dev, ddata->regmap, ddata->irq, | |
165 | IRQF_ONESHOT | IRQF_SHARED, | |
166 | 0, &stpmic1_regmap_irq_chip, | |
167 | &ddata->irq_data); | |
168 | if (ret) { | |
169 | dev_err(dev, "IRQ Chip registration failed: %d\n", ret); | |
170 | return ret; | |
171 | } | |
172 | ||
6e9df38f SN |
173 | ret = devm_register_sys_off_handler(ddata->dev, |
174 | SYS_OFF_MODE_POWER_OFF, | |
175 | SYS_OFF_PRIO_DEFAULT, | |
176 | stpmic1_power_off, | |
177 | ddata); | |
178 | if (ret) { | |
179 | dev_err(ddata->dev, "failed to register sys-off handler: %d\n", ret); | |
180 | return ret; | |
181 | } | |
182 | ||
51908d2e PPL |
183 | return devm_of_platform_populate(dev); |
184 | } | |
185 | ||
51908d2e PPL |
186 | static int stpmic1_suspend(struct device *dev) |
187 | { | |
188 | struct i2c_client *i2c = to_i2c_client(dev); | |
189 | struct stpmic1 *pmic_dev = i2c_get_clientdata(i2c); | |
190 | ||
191 | disable_irq(pmic_dev->irq); | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
196 | static int stpmic1_resume(struct device *dev) | |
197 | { | |
198 | struct i2c_client *i2c = to_i2c_client(dev); | |
199 | struct stpmic1 *pmic_dev = i2c_get_clientdata(i2c); | |
200 | int ret; | |
201 | ||
202 | ret = regcache_sync(pmic_dev->regmap); | |
203 | if (ret) | |
204 | return ret; | |
205 | ||
206 | enable_irq(pmic_dev->irq); | |
207 | ||
208 | return 0; | |
209 | } | |
51908d2e | 210 | |
e4b9a17c | 211 | static DEFINE_SIMPLE_DEV_PM_OPS(stpmic1_pm, stpmic1_suspend, stpmic1_resume); |
51908d2e PPL |
212 | |
213 | static const struct of_device_id stpmic1_of_match[] = { | |
214 | { .compatible = "st,stpmic1", }, | |
215 | {}, | |
216 | }; | |
217 | MODULE_DEVICE_TABLE(of, stpmic1_of_match); | |
218 | ||
219 | static struct i2c_driver stpmic1_driver = { | |
220 | .driver = { | |
221 | .name = "stpmic1", | |
222 | .of_match_table = of_match_ptr(stpmic1_of_match), | |
e4b9a17c | 223 | .pm = pm_sleep_ptr(&stpmic1_pm), |
51908d2e | 224 | }, |
9816d859 | 225 | .probe = stpmic1_probe, |
51908d2e PPL |
226 | }; |
227 | ||
228 | module_i2c_driver(stpmic1_driver); | |
229 | ||
230 | MODULE_DESCRIPTION("STPMIC1 PMIC Driver"); | |
231 | MODULE_AUTHOR("Pascal Paillet <p.paillet@st.com>"); | |
232 | MODULE_LICENSE("GPL v2"); |