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a4872e80 HHW |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // | |
3 | // Copyright (c) 2019 MediaTek Inc. | |
4 | ||
5 | #include <linux/interrupt.h> | |
6 | #include <linux/module.h> | |
7 | #include <linux/of.h> | |
8 | #include <linux/of_device.h> | |
9 | #include <linux/of_irq.h> | |
10 | #include <linux/platform_device.h> | |
11 | #include <linux/regmap.h> | |
4e2e7cfe | 12 | #include <linux/suspend.h> |
a4872e80 HHW |
13 | #include <linux/mfd/mt6323/core.h> |
14 | #include <linux/mfd/mt6323/registers.h> | |
d9cd0bc6 ADR |
15 | #include <linux/mfd/mt6331/core.h> |
16 | #include <linux/mfd/mt6331/registers.h> | |
a4872e80 HHW |
17 | #include <linux/mfd/mt6397/core.h> |
18 | #include <linux/mfd/mt6397/registers.h> | |
19 | ||
20 | static void mt6397_irq_lock(struct irq_data *data) | |
21 | { | |
22 | struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data); | |
23 | ||
24 | mutex_lock(&mt6397->irqlock); | |
25 | } | |
26 | ||
27 | static void mt6397_irq_sync_unlock(struct irq_data *data) | |
28 | { | |
29 | struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data); | |
30 | ||
31 | regmap_write(mt6397->regmap, mt6397->int_con[0], | |
32 | mt6397->irq_masks_cur[0]); | |
33 | regmap_write(mt6397->regmap, mt6397->int_con[1], | |
34 | mt6397->irq_masks_cur[1]); | |
35 | ||
36 | mutex_unlock(&mt6397->irqlock); | |
37 | } | |
38 | ||
39 | static void mt6397_irq_disable(struct irq_data *data) | |
40 | { | |
41 | struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data); | |
42 | int shift = data->hwirq & 0xf; | |
43 | int reg = data->hwirq >> 4; | |
44 | ||
45 | mt6397->irq_masks_cur[reg] &= ~BIT(shift); | |
46 | } | |
47 | ||
48 | static void mt6397_irq_enable(struct irq_data *data) | |
49 | { | |
50 | struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data); | |
51 | int shift = data->hwirq & 0xf; | |
52 | int reg = data->hwirq >> 4; | |
53 | ||
54 | mt6397->irq_masks_cur[reg] |= BIT(shift); | |
55 | } | |
56 | ||
a4872e80 HHW |
57 | static int mt6397_irq_set_wake(struct irq_data *irq_data, unsigned int on) |
58 | { | |
59 | struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(irq_data); | |
60 | int shift = irq_data->hwirq & 0xf; | |
61 | int reg = irq_data->hwirq >> 4; | |
62 | ||
63 | if (on) | |
64 | mt6397->wake_mask[reg] |= BIT(shift); | |
65 | else | |
66 | mt6397->wake_mask[reg] &= ~BIT(shift); | |
67 | ||
68 | return 0; | |
69 | } | |
a4872e80 HHW |
70 | |
71 | static struct irq_chip mt6397_irq_chip = { | |
72 | .name = "mt6397-irq", | |
73 | .irq_bus_lock = mt6397_irq_lock, | |
74 | .irq_bus_sync_unlock = mt6397_irq_sync_unlock, | |
75 | .irq_enable = mt6397_irq_enable, | |
76 | .irq_disable = mt6397_irq_disable, | |
e1243e0d | 77 | .irq_set_wake = pm_sleep_ptr(mt6397_irq_set_wake), |
a4872e80 HHW |
78 | }; |
79 | ||
80 | static void mt6397_irq_handle_reg(struct mt6397_chip *mt6397, int reg, | |
81 | int irqbase) | |
82 | { | |
4e2e7cfe | 83 | unsigned int status = 0; |
a4872e80 HHW |
84 | int i, irq, ret; |
85 | ||
86 | ret = regmap_read(mt6397->regmap, reg, &status); | |
87 | if (ret) { | |
88 | dev_err(mt6397->dev, "Failed to read irq status: %d\n", ret); | |
89 | return; | |
90 | } | |
91 | ||
92 | for (i = 0; i < 16; i++) { | |
93 | if (status & BIT(i)) { | |
94 | irq = irq_find_mapping(mt6397->irq_domain, irqbase + i); | |
95 | if (irq) | |
96 | handle_nested_irq(irq); | |
97 | } | |
98 | } | |
99 | ||
100 | regmap_write(mt6397->regmap, reg, status); | |
101 | } | |
102 | ||
103 | static irqreturn_t mt6397_irq_thread(int irq, void *data) | |
104 | { | |
105 | struct mt6397_chip *mt6397 = data; | |
106 | ||
107 | mt6397_irq_handle_reg(mt6397, mt6397->int_status[0], 0); | |
108 | mt6397_irq_handle_reg(mt6397, mt6397->int_status[1], 16); | |
109 | ||
110 | return IRQ_HANDLED; | |
111 | } | |
112 | ||
113 | static int mt6397_irq_domain_map(struct irq_domain *d, unsigned int irq, | |
114 | irq_hw_number_t hw) | |
115 | { | |
116 | struct mt6397_chip *mt6397 = d->host_data; | |
117 | ||
118 | irq_set_chip_data(irq, mt6397); | |
119 | irq_set_chip_and_handler(irq, &mt6397_irq_chip, handle_level_irq); | |
120 | irq_set_nested_thread(irq, 1); | |
121 | irq_set_noprobe(irq); | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
126 | static const struct irq_domain_ops mt6397_irq_domain_ops = { | |
127 | .map = mt6397_irq_domain_map, | |
128 | }; | |
129 | ||
4e2e7cfe HHW |
130 | static int mt6397_irq_pm_notifier(struct notifier_block *notifier, |
131 | unsigned long pm_event, void *unused) | |
132 | { | |
133 | struct mt6397_chip *chip = | |
134 | container_of(notifier, struct mt6397_chip, pm_nb); | |
135 | ||
136 | switch (pm_event) { | |
137 | case PM_SUSPEND_PREPARE: | |
138 | regmap_write(chip->regmap, | |
139 | chip->int_con[0], chip->wake_mask[0]); | |
140 | regmap_write(chip->regmap, | |
141 | chip->int_con[1], chip->wake_mask[1]); | |
142 | enable_irq_wake(chip->irq); | |
143 | break; | |
144 | ||
145 | case PM_POST_SUSPEND: | |
146 | regmap_write(chip->regmap, | |
147 | chip->int_con[0], chip->irq_masks_cur[0]); | |
148 | regmap_write(chip->regmap, | |
149 | chip->int_con[1], chip->irq_masks_cur[1]); | |
150 | disable_irq_wake(chip->irq); | |
151 | break; | |
152 | ||
153 | default: | |
154 | break; | |
155 | } | |
156 | ||
157 | return NOTIFY_DONE; | |
158 | } | |
159 | ||
a4872e80 HHW |
160 | int mt6397_irq_init(struct mt6397_chip *chip) |
161 | { | |
162 | int ret; | |
163 | ||
164 | mutex_init(&chip->irqlock); | |
165 | ||
166 | switch (chip->chip_id) { | |
167 | case MT6323_CHIP_ID: | |
168 | chip->int_con[0] = MT6323_INT_CON0; | |
169 | chip->int_con[1] = MT6323_INT_CON1; | |
170 | chip->int_status[0] = MT6323_INT_STATUS0; | |
171 | chip->int_status[1] = MT6323_INT_STATUS1; | |
172 | break; | |
d9cd0bc6 ADR |
173 | case MT6331_CHIP_ID: |
174 | chip->int_con[0] = MT6331_INT_CON0; | |
175 | chip->int_con[1] = MT6331_INT_CON1; | |
176 | chip->int_status[0] = MT6331_INT_STATUS_CON0; | |
177 | chip->int_status[1] = MT6331_INT_STATUS_CON1; | |
178 | break; | |
a4872e80 HHW |
179 | case MT6391_CHIP_ID: |
180 | case MT6397_CHIP_ID: | |
181 | chip->int_con[0] = MT6397_INT_CON0; | |
182 | chip->int_con[1] = MT6397_INT_CON1; | |
183 | chip->int_status[0] = MT6397_INT_STATUS0; | |
184 | chip->int_status[1] = MT6397_INT_STATUS1; | |
185 | break; | |
186 | ||
187 | default: | |
188 | dev_err(chip->dev, "unsupported chip: 0x%x\n", chip->chip_id); | |
189 | return -ENODEV; | |
190 | } | |
191 | ||
192 | /* Mask all interrupt sources */ | |
193 | regmap_write(chip->regmap, chip->int_con[0], 0x0); | |
194 | regmap_write(chip->regmap, chip->int_con[1], 0x0); | |
195 | ||
4e2e7cfe | 196 | chip->pm_nb.notifier_call = mt6397_irq_pm_notifier; |
a4872e80 HHW |
197 | chip->irq_domain = irq_domain_add_linear(chip->dev->of_node, |
198 | MT6397_IRQ_NR, | |
199 | &mt6397_irq_domain_ops, | |
200 | chip); | |
201 | if (!chip->irq_domain) { | |
202 | dev_err(chip->dev, "could not create irq domain\n"); | |
203 | return -ENOMEM; | |
204 | } | |
205 | ||
206 | ret = devm_request_threaded_irq(chip->dev, chip->irq, NULL, | |
207 | mt6397_irq_thread, IRQF_ONESHOT, | |
208 | "mt6397-pmic", chip); | |
209 | if (ret) { | |
210 | dev_err(chip->dev, "failed to register irq=%d; err: %d\n", | |
211 | chip->irq, ret); | |
212 | return ret; | |
213 | } | |
214 | ||
4e2e7cfe | 215 | register_pm_notifier(&chip->pm_nb); |
a4872e80 HHW |
216 | return 0; |
217 | } |