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1 | /* |
2 | * axp20x.c - MFD core driver for the X-Powers AXP202 and AXP209 | |
3 | * | |
4 | * AXP20x comprises an adaptive USB-Compatible PWM charger, 2 BUCK DC-DC | |
5 | * converters, 5 LDOs, multiple 12-bit ADCs of voltage, current and temperature | |
6 | * as well as 4 configurable GPIOs. | |
7 | * | |
8 | * Author: Carlo Caione <carlo@caione.org> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | */ | |
14 | ||
15 | #include <linux/err.h> | |
16 | #include <linux/i2c.h> | |
17 | #include <linux/interrupt.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/pm_runtime.h> | |
21 | #include <linux/regmap.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/regulator/consumer.h> | |
24 | #include <linux/mfd/axp20x.h> | |
25 | #include <linux/mfd/core.h> | |
26 | #include <linux/of_device.h> | |
27 | #include <linux/of_irq.h> | |
28 | ||
29 | #define AXP20X_OFF 0x80 | |
30 | ||
31 | static const struct regmap_range axp20x_writeable_ranges[] = { | |
32 | regmap_reg_range(AXP20X_DATACACHE(0), AXP20X_IRQ5_STATE), | |
33 | regmap_reg_range(AXP20X_DCDC_MODE, AXP20X_FG_RES), | |
34 | }; | |
35 | ||
36 | static const struct regmap_range axp20x_volatile_ranges[] = { | |
37 | regmap_reg_range(AXP20X_IRQ1_EN, AXP20X_IRQ5_STATE), | |
38 | }; | |
39 | ||
40 | static const struct regmap_access_table axp20x_writeable_table = { | |
41 | .yes_ranges = axp20x_writeable_ranges, | |
42 | .n_yes_ranges = ARRAY_SIZE(axp20x_writeable_ranges), | |
43 | }; | |
44 | ||
45 | static const struct regmap_access_table axp20x_volatile_table = { | |
46 | .yes_ranges = axp20x_volatile_ranges, | |
47 | .n_yes_ranges = ARRAY_SIZE(axp20x_volatile_ranges), | |
48 | }; | |
49 | ||
50 | static struct resource axp20x_pek_resources[] = { | |
51 | { | |
52 | .name = "PEK_DBR", | |
53 | .start = AXP20X_IRQ_PEK_RIS_EDGE, | |
54 | .end = AXP20X_IRQ_PEK_RIS_EDGE, | |
55 | .flags = IORESOURCE_IRQ, | |
56 | }, { | |
57 | .name = "PEK_DBF", | |
58 | .start = AXP20X_IRQ_PEK_FAL_EDGE, | |
59 | .end = AXP20X_IRQ_PEK_FAL_EDGE, | |
60 | .flags = IORESOURCE_IRQ, | |
61 | }, | |
62 | }; | |
63 | ||
64 | static const struct regmap_config axp20x_regmap_config = { | |
65 | .reg_bits = 8, | |
66 | .val_bits = 8, | |
67 | .wr_table = &axp20x_writeable_table, | |
68 | .volatile_table = &axp20x_volatile_table, | |
69 | .max_register = AXP20X_FG_RES, | |
70 | .cache_type = REGCACHE_RBTREE, | |
71 | }; | |
72 | ||
73 | #define AXP20X_IRQ(_irq, _off, _mask) \ | |
74 | [AXP20X_IRQ_##_irq] = { .reg_offset = (_off), .mask = BIT(_mask) } | |
75 | ||
76 | static const struct regmap_irq axp20x_regmap_irqs[] = { | |
77 | AXP20X_IRQ(ACIN_OVER_V, 0, 7), | |
78 | AXP20X_IRQ(ACIN_PLUGIN, 0, 6), | |
79 | AXP20X_IRQ(ACIN_REMOVAL, 0, 5), | |
80 | AXP20X_IRQ(VBUS_OVER_V, 0, 4), | |
81 | AXP20X_IRQ(VBUS_PLUGIN, 0, 3), | |
82 | AXP20X_IRQ(VBUS_REMOVAL, 0, 2), | |
83 | AXP20X_IRQ(VBUS_V_LOW, 0, 1), | |
84 | AXP20X_IRQ(BATT_PLUGIN, 1, 7), | |
85 | AXP20X_IRQ(BATT_REMOVAL, 1, 6), | |
86 | AXP20X_IRQ(BATT_ENT_ACT_MODE, 1, 5), | |
87 | AXP20X_IRQ(BATT_EXIT_ACT_MODE, 1, 4), | |
88 | AXP20X_IRQ(CHARG, 1, 3), | |
89 | AXP20X_IRQ(CHARG_DONE, 1, 2), | |
90 | AXP20X_IRQ(BATT_TEMP_HIGH, 1, 1), | |
91 | AXP20X_IRQ(BATT_TEMP_LOW, 1, 0), | |
92 | AXP20X_IRQ(DIE_TEMP_HIGH, 2, 7), | |
93 | AXP20X_IRQ(CHARG_I_LOW, 2, 6), | |
94 | AXP20X_IRQ(DCDC1_V_LONG, 2, 5), | |
95 | AXP20X_IRQ(DCDC2_V_LONG, 2, 4), | |
96 | AXP20X_IRQ(DCDC3_V_LONG, 2, 3), | |
97 | AXP20X_IRQ(PEK_SHORT, 2, 1), | |
98 | AXP20X_IRQ(PEK_LONG, 2, 0), | |
99 | AXP20X_IRQ(N_OE_PWR_ON, 3, 7), | |
100 | AXP20X_IRQ(N_OE_PWR_OFF, 3, 6), | |
101 | AXP20X_IRQ(VBUS_VALID, 3, 5), | |
102 | AXP20X_IRQ(VBUS_NOT_VALID, 3, 4), | |
103 | AXP20X_IRQ(VBUS_SESS_VALID, 3, 3), | |
104 | AXP20X_IRQ(VBUS_SESS_END, 3, 2), | |
105 | AXP20X_IRQ(LOW_PWR_LVL1, 3, 1), | |
106 | AXP20X_IRQ(LOW_PWR_LVL2, 3, 0), | |
107 | AXP20X_IRQ(TIMER, 4, 7), | |
108 | AXP20X_IRQ(PEK_RIS_EDGE, 4, 6), | |
109 | AXP20X_IRQ(PEK_FAL_EDGE, 4, 5), | |
110 | AXP20X_IRQ(GPIO3_INPUT, 4, 3), | |
111 | AXP20X_IRQ(GPIO2_INPUT, 4, 2), | |
112 | AXP20X_IRQ(GPIO1_INPUT, 4, 1), | |
113 | AXP20X_IRQ(GPIO0_INPUT, 4, 0), | |
114 | }; | |
115 | ||
116 | static const struct of_device_id axp20x_of_match[] = { | |
117 | { .compatible = "x-powers,axp202", .data = (void *) AXP202_ID }, | |
118 | { .compatible = "x-powers,axp209", .data = (void *) AXP209_ID }, | |
119 | { }, | |
120 | }; | |
121 | MODULE_DEVICE_TABLE(of, axp20x_of_match); | |
122 | ||
123 | /* | |
124 | * This is useless for OF-enabled devices, but it is needed by I2C subsystem | |
125 | */ | |
126 | static const struct i2c_device_id axp20x_i2c_id[] = { | |
127 | { }, | |
128 | }; | |
129 | MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id); | |
130 | ||
131 | static const struct regmap_irq_chip axp20x_regmap_irq_chip = { | |
132 | .name = "axp20x_irq_chip", | |
133 | .status_base = AXP20X_IRQ1_STATE, | |
134 | .ack_base = AXP20X_IRQ1_STATE, | |
135 | .mask_base = AXP20X_IRQ1_EN, | |
136 | .num_regs = 5, | |
137 | .irqs = axp20x_regmap_irqs, | |
138 | .num_irqs = ARRAY_SIZE(axp20x_regmap_irqs), | |
139 | .mask_invert = true, | |
140 | .init_ack_masked = true, | |
141 | }; | |
142 | ||
cfb61a41 CC |
143 | static struct mfd_cell axp20x_cells[] = { |
144 | { | |
145 | .name = "axp20x-pek", | |
146 | .num_resources = ARRAY_SIZE(axp20x_pek_resources), | |
147 | .resources = axp20x_pek_resources, | |
148 | }, { | |
149 | .name = "axp20x-regulator", | |
cfb61a41 CC |
150 | }, |
151 | }; | |
152 | ||
153 | static struct axp20x_dev *axp20x_pm_power_off; | |
154 | static void axp20x_power_off(void) | |
155 | { | |
156 | regmap_write(axp20x_pm_power_off->regmap, AXP20X_OFF_CTRL, | |
157 | AXP20X_OFF); | |
158 | } | |
159 | ||
160 | static int axp20x_i2c_probe(struct i2c_client *i2c, | |
161 | const struct i2c_device_id *id) | |
162 | { | |
163 | struct axp20x_dev *axp20x; | |
164 | const struct of_device_id *of_id; | |
165 | int ret; | |
166 | ||
167 | axp20x = devm_kzalloc(&i2c->dev, sizeof(*axp20x), GFP_KERNEL); | |
168 | if (!axp20x) | |
169 | return -ENOMEM; | |
170 | ||
171 | of_id = of_match_device(axp20x_of_match, &i2c->dev); | |
172 | if (!of_id) { | |
173 | dev_err(&i2c->dev, "Unable to setup AXP20X data\n"); | |
174 | return -ENODEV; | |
175 | } | |
176 | axp20x->variant = (long) of_id->data; | |
177 | ||
178 | axp20x->i2c_client = i2c; | |
179 | axp20x->dev = &i2c->dev; | |
180 | dev_set_drvdata(axp20x->dev, axp20x); | |
181 | ||
182 | axp20x->regmap = devm_regmap_init_i2c(i2c, &axp20x_regmap_config); | |
183 | if (IS_ERR(axp20x->regmap)) { | |
184 | ret = PTR_ERR(axp20x->regmap); | |
185 | dev_err(&i2c->dev, "regmap init failed: %d\n", ret); | |
186 | return ret; | |
187 | } | |
188 | ||
189 | ret = regmap_add_irq_chip(axp20x->regmap, i2c->irq, | |
190 | IRQF_ONESHOT | IRQF_SHARED, -1, | |
191 | &axp20x_regmap_irq_chip, | |
192 | &axp20x->regmap_irqc); | |
193 | if (ret) { | |
194 | dev_err(&i2c->dev, "failed to add irq chip: %d\n", ret); | |
195 | return ret; | |
196 | } | |
197 | ||
198 | ret = mfd_add_devices(axp20x->dev, -1, axp20x_cells, | |
199 | ARRAY_SIZE(axp20x_cells), NULL, 0, NULL); | |
200 | ||
201 | if (ret) { | |
202 | dev_err(&i2c->dev, "failed to add MFD devices: %d\n", ret); | |
203 | regmap_del_irq_chip(i2c->irq, axp20x->regmap_irqc); | |
204 | return ret; | |
205 | } | |
206 | ||
207 | if (!pm_power_off) { | |
208 | axp20x_pm_power_off = axp20x; | |
209 | pm_power_off = axp20x_power_off; | |
210 | } | |
211 | ||
212 | dev_info(&i2c->dev, "AXP20X driver loaded\n"); | |
213 | ||
214 | return 0; | |
215 | } | |
216 | ||
217 | static int axp20x_i2c_remove(struct i2c_client *i2c) | |
218 | { | |
219 | struct axp20x_dev *axp20x = i2c_get_clientdata(i2c); | |
220 | ||
221 | if (axp20x == axp20x_pm_power_off) { | |
222 | axp20x_pm_power_off = NULL; | |
223 | pm_power_off = NULL; | |
224 | } | |
225 | ||
226 | mfd_remove_devices(axp20x->dev); | |
227 | regmap_del_irq_chip(axp20x->i2c_client->irq, axp20x->regmap_irqc); | |
228 | ||
229 | return 0; | |
230 | } | |
231 | ||
232 | static struct i2c_driver axp20x_i2c_driver = { | |
233 | .driver = { | |
234 | .name = "axp20x", | |
235 | .owner = THIS_MODULE, | |
236 | .of_match_table = of_match_ptr(axp20x_of_match), | |
237 | }, | |
238 | .probe = axp20x_i2c_probe, | |
239 | .remove = axp20x_i2c_remove, | |
240 | .id_table = axp20x_i2c_id, | |
241 | }; | |
242 | ||
243 | module_i2c_driver(axp20x_i2c_driver); | |
244 | ||
245 | MODULE_DESCRIPTION("PMIC MFD core driver for AXP20X"); | |
246 | MODULE_AUTHOR("Carlo Caione <carlo@caione.org>"); | |
247 | MODULE_LICENSE("GPL"); |