tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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 */
24enum {
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
35static const struct resource power_button_resources[] = {
36 DEFINE_RES_IRQ(CHTDC_TI_PWRBTN),
37};
38
39static const struct resource thermal_resources[] = {
40 DEFINE_RES_IRQ(CHTDC_TI_DIETMPWARN),
41};
42
43static const struct resource adc_resources[] = {
44 DEFINE_RES_IRQ(CHTDC_TI_ADCCMPL),
45};
46
47static const struct resource pwrsrc_resources[] = {
48 DEFINE_RES_IRQ(CHTDC_TI_VBUSDET),
49};
50
51static const struct resource battery_resources[] = {
52 DEFINE_RES_IRQ(CHTDC_TI_VBATLOW),
53 DEFINE_RES_IRQ(CHTDC_TI_CCEOCAL),
54};
55
56static 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
81static const struct regmap_config chtdc_ti_regmap_config = {
82 .reg_bits = 8,
83 .val_bits = 8,
84 .max_register = 0xff,
85 /* The hardware does not support reading multiple registers at once */
86 .use_single_read = true,
87};
88
89static const struct regmap_irq chtdc_ti_irqs[] = {
90 REGMAP_IRQ_REG(CHTDC_TI_PWRBTN, 0, BIT(CHTDC_TI_PWRBTN)),
91 REGMAP_IRQ_REG(CHTDC_TI_DIETMPWARN, 0, BIT(CHTDC_TI_DIETMPWARN)),
92 REGMAP_IRQ_REG(CHTDC_TI_ADCCMPL, 0, BIT(CHTDC_TI_ADCCMPL)),
93 REGMAP_IRQ_REG(CHTDC_TI_VBATLOW, 0, BIT(CHTDC_TI_VBATLOW)),
94 REGMAP_IRQ_REG(CHTDC_TI_VBUSDET, 0, BIT(CHTDC_TI_VBUSDET)),
95 REGMAP_IRQ_REG(CHTDC_TI_CCEOCAL, 0, BIT(CHTDC_TI_CCEOCAL)),
96};
97
98static const struct regmap_irq_chip chtdc_ti_irq_chip = {
99 .name = KBUILD_MODNAME,
100 .irqs = chtdc_ti_irqs,
101 .num_irqs = ARRAY_SIZE(chtdc_ti_irqs),
102 .num_regs = 1,
103 .status_base = CHTDC_TI_IRQLVL1,
104 .mask_base = CHTDC_TI_MASK_IRQLVL1,
105 .ack_base = CHTDC_TI_IRQLVL1,
106};
107
108static int chtdc_ti_probe(struct i2c_client *i2c)
109{
110 struct device *dev = &i2c->dev;
111 struct intel_soc_pmic *pmic;
112 int ret;
113
114 pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
115 if (!pmic)
116 return -ENOMEM;
117
118 i2c_set_clientdata(i2c, pmic);
119
120 pmic->regmap = devm_regmap_init_i2c(i2c, &chtdc_ti_regmap_config);
121 if (IS_ERR(pmic->regmap))
122 return PTR_ERR(pmic->regmap);
123 pmic->irq = i2c->irq;
124
125 ret = devm_regmap_add_irq_chip(dev, pmic->regmap, pmic->irq,
126 IRQF_ONESHOT, 0,
127 &chtdc_ti_irq_chip,
128 &pmic->irq_chip_data);
129 if (ret)
130 return ret;
131
132 return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, chtdc_ti_dev,
133 ARRAY_SIZE(chtdc_ti_dev), NULL, 0,
134 regmap_irq_get_domain(pmic->irq_chip_data));
135}
136
137static void chtdc_ti_shutdown(struct i2c_client *i2c)
138{
139 struct intel_soc_pmic *pmic = i2c_get_clientdata(i2c);
140
141 disable_irq(pmic->irq);
142}
143
144static int chtdc_ti_suspend(struct device *dev)
145{
146 struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
147
148 disable_irq(pmic->irq);
149
150 return 0;
151}
152
153static int chtdc_ti_resume(struct device *dev)
154{
155 struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
156
157 enable_irq(pmic->irq);
158
159 return 0;
160}
161
162static DEFINE_SIMPLE_DEV_PM_OPS(chtdc_ti_pm_ops, chtdc_ti_suspend, chtdc_ti_resume);
163
164static const struct acpi_device_id chtdc_ti_acpi_ids[] = {
165 { "INT33F5" },
166 { },
167};
168MODULE_DEVICE_TABLE(acpi, chtdc_ti_acpi_ids);
169
170static struct i2c_driver chtdc_ti_i2c_driver = {
171 .driver = {
172 .name = "intel_soc_pmic_chtdc_ti",
173 .pm = pm_sleep_ptr(&chtdc_ti_pm_ops),
174 .acpi_match_table = chtdc_ti_acpi_ids,
175 },
176 .probe = chtdc_ti_probe,
177 .shutdown = chtdc_ti_shutdown,
178};
179module_i2c_driver(chtdc_ti_i2c_driver);
180
181MODULE_DESCRIPTION("I2C driver for Intel SoC Dollar Cove TI PMIC");
182MODULE_LICENSE("GPL v2");