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51652384 ZL |
1 | /* |
2 | * intel_soc_pmic_core.c - Intel SoC PMIC MFD Driver | |
3 | * | |
4 | * Copyright (C) 2013, 2014 Intel Corporation. All rights reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License version | |
8 | * 2 as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * Author: Yang, Bin <bin.yang@intel.com> | |
16 | * Author: Zhu, Lejun <lejun.zhu@linux.intel.com> | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/mfd/core.h> | |
21 | #include <linux/i2c.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/gpio/consumer.h> | |
24 | #include <linux/acpi.h> | |
25 | #include <linux/regmap.h> | |
26 | #include <linux/mfd/intel_soc_pmic.h> | |
61dd2ca2 | 27 | #include <linux/gpio/machine.h> |
a3aa9a93 | 28 | #include <linux/pwm.h> |
51652384 ZL |
29 | #include "intel_soc_pmic_core.h" |
30 | ||
61dd2ca2 SK |
31 | /* Lookup table for the Panel Enable/Disable line as GPIO signals */ |
32 | static struct gpiod_lookup_table panel_gpio_table = { | |
33 | /* Intel GFX is consumer */ | |
34 | .dev_id = "0000:00:02.0", | |
35 | .table = { | |
36 | /* Panel EN/DISABLE */ | |
37 | GPIO_LOOKUP("gpio_crystalcove", 94, "panel", GPIO_ACTIVE_HIGH), | |
38 | }, | |
39 | }; | |
40 | ||
a3aa9a93 SK |
41 | /* PWM consumed by the Intel GFX */ |
42 | static struct pwm_lookup crc_pwm_lookup[] = { | |
43 | PWM_LOOKUP("crystal_cove_pwm", 0, "0000:00:02.0", "pwm_backlight", 0, PWM_POLARITY_NORMAL), | |
44 | }; | |
45 | ||
51652384 ZL |
46 | static int intel_soc_pmic_find_gpio_irq(struct device *dev) |
47 | { | |
48 | struct gpio_desc *desc; | |
49 | int irq; | |
50 | ||
9dc50219 | 51 | desc = devm_gpiod_get_index(dev, "intel_soc_pmic", 0, GPIOD_IN); |
51652384 | 52 | if (IS_ERR(desc)) |
ad7b5a17 | 53 | return PTR_ERR(desc); |
51652384 ZL |
54 | |
55 | irq = gpiod_to_irq(desc); | |
56 | if (irq < 0) | |
57 | dev_warn(dev, "Can't get irq: %d\n", irq); | |
58 | ||
59 | return irq; | |
60 | } | |
61 | ||
62 | static int intel_soc_pmic_i2c_probe(struct i2c_client *i2c, | |
63 | const struct i2c_device_id *i2c_id) | |
64 | { | |
65 | struct device *dev = &i2c->dev; | |
66 | const struct acpi_device_id *id; | |
67 | struct intel_soc_pmic_config *config; | |
68 | struct intel_soc_pmic *pmic; | |
69 | int ret; | |
70 | int irq; | |
71 | ||
72 | id = acpi_match_device(dev->driver->acpi_match_table, dev); | |
73 | if (!id || !id->driver_data) | |
74 | return -ENODEV; | |
75 | ||
76 | config = (struct intel_soc_pmic_config *)id->driver_data; | |
77 | ||
78 | pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL); | |
0a65fbf6 KP |
79 | if (!pmic) |
80 | return -ENOMEM; | |
81 | ||
51652384 ZL |
82 | dev_set_drvdata(dev, pmic); |
83 | ||
84 | pmic->regmap = devm_regmap_init_i2c(i2c, config->regmap_config); | |
85 | ||
9c98dcb0 JN |
86 | /* |
87 | * On some boards the PMIC interrupt may come from a GPIO line. Try to | |
88 | * lookup the ACPI table for a such connection and setup a GPIO | |
89 | * interrupt if it exists. Otherwise use the IRQ provided by I2C | |
90 | */ | |
51652384 ZL |
91 | irq = intel_soc_pmic_find_gpio_irq(dev); |
92 | pmic->irq = (irq < 0) ? i2c->irq : irq; | |
93 | ||
94 | ret = regmap_add_irq_chip(pmic->regmap, pmic->irq, | |
95 | config->irq_flags | IRQF_ONESHOT, | |
96 | 0, config->irq_chip, | |
97 | &pmic->irq_chip_data); | |
98 | if (ret) | |
99 | return ret; | |
100 | ||
101 | ret = enable_irq_wake(pmic->irq); | |
102 | if (ret) | |
103 | dev_warn(dev, "Can't enable IRQ as wake source: %d\n", ret); | |
104 | ||
61dd2ca2 SK |
105 | /* Add lookup table binding for Panel Control to the GPIO Chip */ |
106 | gpiod_add_lookup_table(&panel_gpio_table); | |
107 | ||
a3aa9a93 SK |
108 | /* Add lookup table for crc-pwm */ |
109 | pwm_add_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup)); | |
110 | ||
51652384 ZL |
111 | ret = mfd_add_devices(dev, -1, config->cell_dev, |
112 | config->n_cell_devs, NULL, 0, | |
113 | regmap_irq_get_domain(pmic->irq_chip_data)); | |
114 | if (ret) | |
115 | goto err_del_irq_chip; | |
116 | ||
117 | return 0; | |
118 | ||
119 | err_del_irq_chip: | |
120 | regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data); | |
121 | return ret; | |
122 | } | |
123 | ||
124 | static int intel_soc_pmic_i2c_remove(struct i2c_client *i2c) | |
125 | { | |
126 | struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev); | |
127 | ||
128 | regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data); | |
129 | ||
61dd2ca2 SK |
130 | /* Remove lookup table for Panel Control from the GPIO Chip */ |
131 | gpiod_remove_lookup_table(&panel_gpio_table); | |
132 | ||
a3aa9a93 SK |
133 | /* remove crc-pwm lookup table */ |
134 | pwm_remove_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup)); | |
135 | ||
51652384 ZL |
136 | mfd_remove_devices(&i2c->dev); |
137 | ||
138 | return 0; | |
139 | } | |
140 | ||
141 | static void intel_soc_pmic_shutdown(struct i2c_client *i2c) | |
142 | { | |
143 | struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev); | |
144 | ||
145 | disable_irq(pmic->irq); | |
146 | ||
147 | return; | |
148 | } | |
149 | ||
bdaf6703 | 150 | #if defined(CONFIG_PM_SLEEP) |
51652384 ZL |
151 | static int intel_soc_pmic_suspend(struct device *dev) |
152 | { | |
153 | struct intel_soc_pmic *pmic = dev_get_drvdata(dev); | |
154 | ||
155 | disable_irq(pmic->irq); | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
160 | static int intel_soc_pmic_resume(struct device *dev) | |
161 | { | |
162 | struct intel_soc_pmic *pmic = dev_get_drvdata(dev); | |
163 | ||
164 | enable_irq(pmic->irq); | |
165 | ||
166 | return 0; | |
167 | } | |
bdaf6703 | 168 | #endif |
51652384 ZL |
169 | |
170 | static SIMPLE_DEV_PM_OPS(intel_soc_pmic_pm_ops, intel_soc_pmic_suspend, | |
171 | intel_soc_pmic_resume); | |
172 | ||
173 | static const struct i2c_device_id intel_soc_pmic_i2c_id[] = { | |
174 | { } | |
175 | }; | |
176 | MODULE_DEVICE_TABLE(i2c, intel_soc_pmic_i2c_id); | |
177 | ||
52764fd9 | 178 | #if defined(CONFIG_ACPI) |
c465875a | 179 | static const struct acpi_device_id intel_soc_pmic_acpi_match[] = { |
51652384 ZL |
180 | {"INT33FD", (kernel_ulong_t)&intel_soc_pmic_config_crc}, |
181 | { }, | |
182 | }; | |
183 | MODULE_DEVICE_TABLE(acpi, intel_soc_pmic_acpi_match); | |
52764fd9 | 184 | #endif |
51652384 ZL |
185 | |
186 | static struct i2c_driver intel_soc_pmic_i2c_driver = { | |
187 | .driver = { | |
188 | .name = "intel_soc_pmic_i2c", | |
51652384 ZL |
189 | .pm = &intel_soc_pmic_pm_ops, |
190 | .acpi_match_table = ACPI_PTR(intel_soc_pmic_acpi_match), | |
191 | }, | |
192 | .probe = intel_soc_pmic_i2c_probe, | |
193 | .remove = intel_soc_pmic_i2c_remove, | |
194 | .id_table = intel_soc_pmic_i2c_id, | |
195 | .shutdown = intel_soc_pmic_shutdown, | |
196 | }; | |
197 | ||
198 | module_i2c_driver(intel_soc_pmic_i2c_driver); | |
199 | ||
200 | MODULE_DESCRIPTION("I2C driver for Intel SoC PMIC"); | |
201 | MODULE_LICENSE("GPL v2"); | |
202 | MODULE_AUTHOR("Yang, Bin <bin.yang@intel.com>"); | |
203 | MODULE_AUTHOR("Zhu, Lejun <lejun.zhu@linux.intel.com>"); |