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> |
10 | #include <linux/reboot.h> |
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), |
23 | regmap_reg_range(MAIN_CR, LDO6_STDBY_CR), |
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[] = { |
34 | regmap_reg_range(MAIN_CR, LDO6_STDBY_CR), |
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 | |
63 | static const struct regmap_config stpmic1_regmap_config = { |
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, |
112 | .mask_base = INT_SET_MASK_R1, |
113 | .unmask_base = INT_CLEAR_MASK_R1, |
114 | .mask_unmask_non_inverted = true, |
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 | |
121 | static int stpmic1_power_off(struct sys_off_data *data) |
122 | { |
123 | struct stpmic1 *ddata = data->cb_data; |
124 | |
125 | regmap_update_bits(map: ddata->regmap, MAIN_CR, |
126 | SOFTWARE_SWITCH_OFF, SOFTWARE_SWITCH_OFF); |
127 | |
128 | return NOTIFY_DONE; |
129 | } |
130 | |
131 | static int stpmic1_probe(struct i2c_client *i2c) |
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, size: sizeof(struct stpmic1), GFP_KERNEL); |
140 | if (!ddata) |
141 | return -ENOMEM; |
142 | |
143 | i2c_set_clientdata(client: i2c, data: ddata); |
144 | ddata->dev = dev; |
145 | |
146 | ddata->regmap = devm_regmap_init_i2c(i2c, &stpmic1_regmap_config); |
147 | if (IS_ERR(ptr: ddata->regmap)) |
148 | return PTR_ERR(ptr: ddata->regmap); |
149 | |
150 | ddata->irq = of_irq_get(dev: 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(map: ddata->regmap, VERSION_SR, val: ®); |
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, map: ddata->regmap, irq: ddata->irq, |
165 | IRQF_ONESHOT | IRQF_SHARED, |
166 | irq_base: 0, chip: &stpmic1_regmap_irq_chip, |
167 | data: &ddata->irq_data); |
168 | if (ret) { |
169 | dev_err(dev, "IRQ Chip registration failed: %d\n" , ret); |
170 | return ret; |
171 | } |
172 | |
173 | ret = devm_register_sys_off_handler(dev: ddata->dev, |
174 | mode: SYS_OFF_MODE_POWER_OFF, |
175 | SYS_OFF_PRIO_DEFAULT, |
176 | callback: stpmic1_power_off, |
177 | cb_data: ddata); |
178 | if (ret) { |
179 | dev_err(ddata->dev, "failed to register sys-off handler: %d\n" , ret); |
180 | return ret; |
181 | } |
182 | |
183 | return devm_of_platform_populate(dev); |
184 | } |
185 | |
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(client: i2c); |
190 | |
191 | disable_irq(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(client: i2c); |
200 | int ret; |
201 | |
202 | ret = regcache_sync(map: pmic_dev->regmap); |
203 | if (ret) |
204 | return ret; |
205 | |
206 | enable_irq(irq: pmic_dev->irq); |
207 | |
208 | return 0; |
209 | } |
210 | |
211 | static DEFINE_SIMPLE_DEV_PM_OPS(stpmic1_pm, stpmic1_suspend, stpmic1_resume); |
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 = stpmic1_of_match, |
223 | .pm = pm_sleep_ptr(&stpmic1_pm), |
224 | }, |
225 | .probe = stpmic1_probe, |
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" ); |
233 | |