1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Device access for Dollar Cove TI PMIC
4 *
5 * Copyright (c) 2014, Intel Corporation.
6 * Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
7 *
8 * Cleanup and forward-ported
9 * Copyright (c) 2017 Takashi Iwai <tiwai@suse.de>
10 */
11
12 #include <linux/acpi.h>
13 #include <linux/interrupt.h>
14 #include <linux/i2c.h>
15 #include <linux/mfd/core.h>
16 #include <linux/mfd/intel_soc_pmic.h>
17 #include <linux/module.h>
18 #include <linux/regmap.h>
19
20 #define CHTDC_TI_IRQLVL1 0x01
21 #define CHTDC_TI_MASK_IRQLVL1 0x02
22
23 /* Level 1 IRQs */
24 enum {
25 CHTDC_TI_PWRBTN = 0, /* power button */
26 CHTDC_TI_DIETMPWARN, /* thermal */
27 CHTDC_TI_ADCCMPL, /* ADC */
28 /* No IRQ 3 */
29 CHTDC_TI_VBATLOW = 4, /* battery */
30 CHTDC_TI_VBUSDET, /* power source */
31 /* No IRQ 6 */
32 CHTDC_TI_CCEOCAL = 7, /* battery */
33 };
34
35 static const struct resource power_button_resources[] = {
36 DEFINE_RES_IRQ(CHTDC_TI_PWRBTN),
37 };
38
39 static const struct resource thermal_resources[] = {
40 DEFINE_RES_IRQ(CHTDC_TI_DIETMPWARN),
41 };
42
43 static const struct resource adc_resources[] = {
44 DEFINE_RES_IRQ(CHTDC_TI_ADCCMPL),
45 };
46
47 static const struct resource pwrsrc_resources[] = {
48 DEFINE_RES_IRQ(CHTDC_TI_VBUSDET),
49 };
50
51 static const struct resource battery_resources[] = {
52 DEFINE_RES_IRQ(CHTDC_TI_VBATLOW),
53 DEFINE_RES_IRQ(CHTDC_TI_CCEOCAL),
54 };
55
56 static struct mfd_cell chtdc_ti_dev[] = {
57 {
58 .name = "chtdc_ti_pwrbtn",
59 .num_resources = ARRAY_SIZE(power_button_resources),
60 .resources = power_button_resources,
61 }, {
62 .name = "chtdc_ti_adc",
63 .num_resources = ARRAY_SIZE(adc_resources),
64 .resources = adc_resources,
65 }, {
66 .name = "chtdc_ti_thermal",
67 .num_resources = ARRAY_SIZE(thermal_resources),
68 .resources = thermal_resources,
69 }, {
70 .name = "chtdc_ti_pwrsrc",
71 .num_resources = ARRAY_SIZE(pwrsrc_resources),
72 .resources = pwrsrc_resources,
73 }, {
74 .name = "chtdc_ti_battery",
75 .num_resources = ARRAY_SIZE(battery_resources),
76 .resources = battery_resources,
77 },
78 { .name = "chtdc_ti_region", },
79 };
80
81 static const struct regmap_config chtdc_ti_regmap_config = {
82 .reg_bits = 8,
83 .val_bits = 8,
84 .max_register = 128,
85 .cache_type = REGCACHE_NONE,
86 };
87
88 static const struct regmap_irq chtdc_ti_irqs[] = {
89 REGMAP_IRQ_REG(CHTDC_TI_PWRBTN, 0, BIT(CHTDC_TI_PWRBTN)),
90 REGMAP_IRQ_REG(CHTDC_TI_DIETMPWARN, 0, BIT(CHTDC_TI_DIETMPWARN)),
91 REGMAP_IRQ_REG(CHTDC_TI_ADCCMPL, 0, BIT(CHTDC_TI_ADCCMPL)),
92 REGMAP_IRQ_REG(CHTDC_TI_VBATLOW, 0, BIT(CHTDC_TI_VBATLOW)),
93 REGMAP_IRQ_REG(CHTDC_TI_VBUSDET, 0, BIT(CHTDC_TI_VBUSDET)),
94 REGMAP_IRQ_REG(CHTDC_TI_CCEOCAL, 0, BIT(CHTDC_TI_CCEOCAL)),
95 };
96
97 static const struct regmap_irq_chip chtdc_ti_irq_chip = {
98 .name = KBUILD_MODNAME,
99 .irqs = chtdc_ti_irqs,
100 .num_irqs = ARRAY_SIZE(chtdc_ti_irqs),
101 .num_regs = 1,
102 .status_base = CHTDC_TI_IRQLVL1,
103 .mask_base = CHTDC_TI_MASK_IRQLVL1,
104 .ack_base = CHTDC_TI_IRQLVL1,
105 };
106
chtdc_ti_probe(struct i2c_client * i2c)107 static int chtdc_ti_probe(struct i2c_client *i2c)
108 {
109 struct device *dev = &i2c->dev;
110 struct intel_soc_pmic *pmic;
111 int ret;
112
113 pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
114 if (!pmic)
115 return -ENOMEM;
116
117 i2c_set_clientdata(i2c, pmic);
118
119 pmic->regmap = devm_regmap_init_i2c(i2c, &chtdc_ti_regmap_config);
120 if (IS_ERR(pmic->regmap))
121 return PTR_ERR(pmic->regmap);
122 pmic->irq = i2c->irq;
123
124 ret = devm_regmap_add_irq_chip(dev, pmic->regmap, pmic->irq,
125 IRQF_ONESHOT, 0,
126 &chtdc_ti_irq_chip,
127 &pmic->irq_chip_data);
128 if (ret)
129 return ret;
130
131 return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, chtdc_ti_dev,
132 ARRAY_SIZE(chtdc_ti_dev), NULL, 0,
133 regmap_irq_get_domain(pmic->irq_chip_data));
134 }
135
chtdc_ti_shutdown(struct i2c_client * i2c)136 static void chtdc_ti_shutdown(struct i2c_client *i2c)
137 {
138 struct intel_soc_pmic *pmic = i2c_get_clientdata(i2c);
139
140 disable_irq(pmic->irq);
141 }
142
chtdc_ti_suspend(struct device * dev)143 static int chtdc_ti_suspend(struct device *dev)
144 {
145 struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
146
147 disable_irq(pmic->irq);
148
149 return 0;
150 }
151
chtdc_ti_resume(struct device * dev)152 static int chtdc_ti_resume(struct device *dev)
153 {
154 struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
155
156 enable_irq(pmic->irq);
157
158 return 0;
159 }
160
161 static DEFINE_SIMPLE_DEV_PM_OPS(chtdc_ti_pm_ops, chtdc_ti_suspend, chtdc_ti_resume);
162
163 static const struct acpi_device_id chtdc_ti_acpi_ids[] = {
164 { "INT33F5" },
165 { },
166 };
167 MODULE_DEVICE_TABLE(acpi, chtdc_ti_acpi_ids);
168
169 static struct i2c_driver chtdc_ti_i2c_driver = {
170 .driver = {
171 .name = "intel_soc_pmic_chtdc_ti",
172 .pm = pm_sleep_ptr(&chtdc_ti_pm_ops),
173 .acpi_match_table = chtdc_ti_acpi_ids,
174 },
175 .probe = chtdc_ti_probe,
176 .shutdown = chtdc_ti_shutdown,
177 };
178 module_i2c_driver(chtdc_ti_i2c_driver);
179
180 MODULE_DESCRIPTION("I2C driver for Intel SoC Dollar Cove TI PMIC");
181 MODULE_LICENSE("GPL v2");
182