1 /*
2  * Device access for Dollar Cove TI PMIC
3  *
4  * Copyright (c) 2014, Intel Corporation.
5  *   Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
6  *
7  * Cleanup and forward-ported
8  *   Copyright (c) 2017 Takashi Iwai <tiwai@suse.de>
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/acpi.h>
16 #include <linux/interrupt.h>
17 #include <linux/i2c.h>
18 #include <linux/mfd/core.h>
19 #include <linux/mfd/intel_soc_pmic.h>
20 #include <linux/module.h>
21 #include <linux/regmap.h>
22 
23 #define CHTDC_TI_IRQLVL1	0x01
24 #define CHTDC_TI_MASK_IRQLVL1	0x02
25 
26 /* Level 1 IRQs */
27 enum {
28 	CHTDC_TI_PWRBTN = 0,	/* power button */
29 	CHTDC_TI_DIETMPWARN,	/* thermal */
30 	CHTDC_TI_ADCCMPL,	/* ADC */
31 	/* No IRQ 3 */
32 	CHTDC_TI_VBATLOW = 4,	/* battery */
33 	CHTDC_TI_VBUSDET,	/* power source */
34 	/* No IRQ 6 */
35 	CHTDC_TI_CCEOCAL = 7,	/* battery */
36 };
37 
38 static struct resource power_button_resources[] = {
39 	DEFINE_RES_IRQ(CHTDC_TI_PWRBTN),
40 };
41 
42 static struct resource thermal_resources[] = {
43 	DEFINE_RES_IRQ(CHTDC_TI_DIETMPWARN),
44 };
45 
46 static struct resource adc_resources[] = {
47 	DEFINE_RES_IRQ(CHTDC_TI_ADCCMPL),
48 };
49 
50 static struct resource pwrsrc_resources[] = {
51 	DEFINE_RES_IRQ(CHTDC_TI_VBUSDET),
52 };
53 
54 static struct resource battery_resources[] = {
55 	DEFINE_RES_IRQ(CHTDC_TI_VBATLOW),
56 	DEFINE_RES_IRQ(CHTDC_TI_CCEOCAL),
57 };
58 
59 static struct mfd_cell chtdc_ti_dev[] = {
60 	{
61 		.name = "chtdc_ti_pwrbtn",
62 		.num_resources = ARRAY_SIZE(power_button_resources),
63 		.resources = power_button_resources,
64 	}, {
65 		.name = "chtdc_ti_adc",
66 		.num_resources = ARRAY_SIZE(adc_resources),
67 		.resources = adc_resources,
68 	}, {
69 		.name = "chtdc_ti_thermal",
70 		.num_resources = ARRAY_SIZE(thermal_resources),
71 		.resources = thermal_resources,
72 	}, {
73 		.name = "chtdc_ti_pwrsrc",
74 		.num_resources = ARRAY_SIZE(pwrsrc_resources),
75 		.resources = pwrsrc_resources,
76 	}, {
77 		.name = "chtdc_ti_battery",
78 		.num_resources = ARRAY_SIZE(battery_resources),
79 		.resources = battery_resources,
80 	},
81 	{	.name = "chtdc_ti_region", },
82 };
83 
84 static const struct regmap_config chtdc_ti_regmap_config = {
85 	.reg_bits = 8,
86 	.val_bits = 8,
87 	.max_register = 128,
88 	.cache_type = REGCACHE_NONE,
89 };
90 
91 static const struct regmap_irq chtdc_ti_irqs[] = {
92 	REGMAP_IRQ_REG(CHTDC_TI_PWRBTN, 0, BIT(CHTDC_TI_PWRBTN)),
93 	REGMAP_IRQ_REG(CHTDC_TI_DIETMPWARN, 0, BIT(CHTDC_TI_DIETMPWARN)),
94 	REGMAP_IRQ_REG(CHTDC_TI_ADCCMPL, 0, BIT(CHTDC_TI_ADCCMPL)),
95 	REGMAP_IRQ_REG(CHTDC_TI_VBATLOW, 0, BIT(CHTDC_TI_VBATLOW)),
96 	REGMAP_IRQ_REG(CHTDC_TI_VBUSDET, 0, BIT(CHTDC_TI_VBUSDET)),
97 	REGMAP_IRQ_REG(CHTDC_TI_CCEOCAL, 0, BIT(CHTDC_TI_CCEOCAL)),
98 };
99 
100 static const struct regmap_irq_chip chtdc_ti_irq_chip = {
101 	.name = KBUILD_MODNAME,
102 	.irqs = chtdc_ti_irqs,
103 	.num_irqs = ARRAY_SIZE(chtdc_ti_irqs),
104 	.num_regs = 1,
105 	.status_base = CHTDC_TI_IRQLVL1,
106 	.mask_base = CHTDC_TI_MASK_IRQLVL1,
107 	.ack_base = CHTDC_TI_IRQLVL1,
108 };
109 
110 static int chtdc_ti_probe(struct i2c_client *i2c)
111 {
112 	struct device *dev = &i2c->dev;
113 	struct intel_soc_pmic *pmic;
114 	int ret;
115 
116 	pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
117 	if (!pmic)
118 		return -ENOMEM;
119 
120 	i2c_set_clientdata(i2c, pmic);
121 
122 	pmic->regmap = devm_regmap_init_i2c(i2c, &chtdc_ti_regmap_config);
123 	if (IS_ERR(pmic->regmap))
124 		return PTR_ERR(pmic->regmap);
125 	pmic->irq = i2c->irq;
126 
127 	ret = devm_regmap_add_irq_chip(dev, pmic->regmap, pmic->irq,
128 				       IRQF_ONESHOT, 0,
129 				       &chtdc_ti_irq_chip,
130 				       &pmic->irq_chip_data);
131 	if (ret)
132 		return ret;
133 
134 	return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, chtdc_ti_dev,
135 				    ARRAY_SIZE(chtdc_ti_dev), NULL, 0,
136 				    regmap_irq_get_domain(pmic->irq_chip_data));
137 }
138 
139 static void chtdc_ti_shutdown(struct i2c_client *i2c)
140 {
141 	struct intel_soc_pmic *pmic = i2c_get_clientdata(i2c);
142 
143 	disable_irq(pmic->irq);
144 }
145 
146 static int __maybe_unused chtdc_ti_suspend(struct device *dev)
147 {
148 	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
149 
150 	disable_irq(pmic->irq);
151 
152 	return 0;
153 }
154 
155 static int __maybe_unused chtdc_ti_resume(struct device *dev)
156 {
157 	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
158 
159 	enable_irq(pmic->irq);
160 
161 	return 0;
162 }
163 
164 static SIMPLE_DEV_PM_OPS(chtdc_ti_pm_ops, chtdc_ti_suspend, chtdc_ti_resume);
165 
166 static const struct acpi_device_id chtdc_ti_acpi_ids[] = {
167 	{ "INT33F5" },
168 	{ },
169 };
170 MODULE_DEVICE_TABLE(acpi, chtdc_ti_acpi_ids);
171 
172 static struct i2c_driver chtdc_ti_i2c_driver = {
173 	.driver = {
174 		.name = "intel_soc_pmic_chtdc_ti",
175 		.pm = &chtdc_ti_pm_ops,
176 		.acpi_match_table = chtdc_ti_acpi_ids,
177 	},
178 	.probe_new = chtdc_ti_probe,
179 	.shutdown = chtdc_ti_shutdown,
180 };
181 module_i2c_driver(chtdc_ti_i2c_driver);
182 
183 MODULE_DESCRIPTION("I2C driver for Intel SoC Dollar Cove TI PMIC");
184 MODULE_LICENSE("GPL v2");
185