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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), | |
36e6d081 | 38 | { }, |
61dd2ca2 SK |
39 | }, |
40 | }; | |
41 | ||
a3aa9a93 SK |
42 | /* PWM consumed by the Intel GFX */ |
43 | static struct pwm_lookup crc_pwm_lookup[] = { | |
44 | PWM_LOOKUP("crystal_cove_pwm", 0, "0000:00:02.0", "pwm_backlight", 0, PWM_POLARITY_NORMAL), | |
45 | }; | |
46 | ||
51652384 ZL |
47 | static int intel_soc_pmic_find_gpio_irq(struct device *dev) |
48 | { | |
49 | struct gpio_desc *desc; | |
50 | int irq; | |
51 | ||
9dc50219 | 52 | desc = devm_gpiod_get_index(dev, "intel_soc_pmic", 0, GPIOD_IN); |
51652384 | 53 | if (IS_ERR(desc)) |
ad7b5a17 | 54 | return PTR_ERR(desc); |
51652384 ZL |
55 | |
56 | irq = gpiod_to_irq(desc); | |
57 | if (irq < 0) | |
58 | dev_warn(dev, "Can't get irq: %d\n", irq); | |
59 | ||
60 | return irq; | |
61 | } | |
62 | ||
63 | static int intel_soc_pmic_i2c_probe(struct i2c_client *i2c, | |
64 | const struct i2c_device_id *i2c_id) | |
65 | { | |
66 | struct device *dev = &i2c->dev; | |
67 | const struct acpi_device_id *id; | |
68 | struct intel_soc_pmic_config *config; | |
69 | struct intel_soc_pmic *pmic; | |
70 | int ret; | |
71 | int irq; | |
72 | ||
73 | id = acpi_match_device(dev->driver->acpi_match_table, dev); | |
74 | if (!id || !id->driver_data) | |
75 | return -ENODEV; | |
76 | ||
77 | config = (struct intel_soc_pmic_config *)id->driver_data; | |
78 | ||
79 | pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL); | |
0a65fbf6 KP |
80 | if (!pmic) |
81 | return -ENOMEM; | |
82 | ||
51652384 ZL |
83 | dev_set_drvdata(dev, pmic); |
84 | ||
85 | pmic->regmap = devm_regmap_init_i2c(i2c, config->regmap_config); | |
86 | ||
9c98dcb0 JN |
87 | /* |
88 | * On some boards the PMIC interrupt may come from a GPIO line. Try to | |
89 | * lookup the ACPI table for a such connection and setup a GPIO | |
90 | * interrupt if it exists. Otherwise use the IRQ provided by I2C | |
91 | */ | |
51652384 ZL |
92 | irq = intel_soc_pmic_find_gpio_irq(dev); |
93 | pmic->irq = (irq < 0) ? i2c->irq : irq; | |
94 | ||
95 | ret = regmap_add_irq_chip(pmic->regmap, pmic->irq, | |
96 | config->irq_flags | IRQF_ONESHOT, | |
97 | 0, config->irq_chip, | |
98 | &pmic->irq_chip_data); | |
99 | if (ret) | |
100 | return ret; | |
101 | ||
102 | ret = enable_irq_wake(pmic->irq); | |
103 | if (ret) | |
104 | dev_warn(dev, "Can't enable IRQ as wake source: %d\n", ret); | |
105 | ||
61dd2ca2 SK |
106 | /* Add lookup table binding for Panel Control to the GPIO Chip */ |
107 | gpiod_add_lookup_table(&panel_gpio_table); | |
108 | ||
a3aa9a93 SK |
109 | /* Add lookup table for crc-pwm */ |
110 | pwm_add_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup)); | |
111 | ||
51652384 ZL |
112 | ret = mfd_add_devices(dev, -1, config->cell_dev, |
113 | config->n_cell_devs, NULL, 0, | |
114 | regmap_irq_get_domain(pmic->irq_chip_data)); | |
115 | if (ret) | |
116 | goto err_del_irq_chip; | |
117 | ||
118 | return 0; | |
119 | ||
120 | err_del_irq_chip: | |
121 | regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data); | |
122 | return ret; | |
123 | } | |
124 | ||
125 | static int intel_soc_pmic_i2c_remove(struct i2c_client *i2c) | |
126 | { | |
127 | struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev); | |
128 | ||
129 | regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data); | |
130 | ||
61dd2ca2 SK |
131 | /* Remove lookup table for Panel Control from the GPIO Chip */ |
132 | gpiod_remove_lookup_table(&panel_gpio_table); | |
133 | ||
a3aa9a93 SK |
134 | /* remove crc-pwm lookup table */ |
135 | pwm_remove_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup)); | |
136 | ||
51652384 ZL |
137 | mfd_remove_devices(&i2c->dev); |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | static void intel_soc_pmic_shutdown(struct i2c_client *i2c) | |
143 | { | |
144 | struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev); | |
145 | ||
146 | disable_irq(pmic->irq); | |
147 | ||
148 | return; | |
149 | } | |
150 | ||
bdaf6703 | 151 | #if defined(CONFIG_PM_SLEEP) |
51652384 ZL |
152 | static int intel_soc_pmic_suspend(struct device *dev) |
153 | { | |
154 | struct intel_soc_pmic *pmic = dev_get_drvdata(dev); | |
155 | ||
156 | disable_irq(pmic->irq); | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | static int intel_soc_pmic_resume(struct device *dev) | |
162 | { | |
163 | struct intel_soc_pmic *pmic = dev_get_drvdata(dev); | |
164 | ||
165 | enable_irq(pmic->irq); | |
166 | ||
167 | return 0; | |
168 | } | |
bdaf6703 | 169 | #endif |
51652384 ZL |
170 | |
171 | static SIMPLE_DEV_PM_OPS(intel_soc_pmic_pm_ops, intel_soc_pmic_suspend, | |
172 | intel_soc_pmic_resume); | |
173 | ||
174 | static const struct i2c_device_id intel_soc_pmic_i2c_id[] = { | |
175 | { } | |
176 | }; | |
177 | MODULE_DEVICE_TABLE(i2c, intel_soc_pmic_i2c_id); | |
178 | ||
52764fd9 | 179 | #if defined(CONFIG_ACPI) |
c465875a | 180 | static const struct acpi_device_id intel_soc_pmic_acpi_match[] = { |
51652384 ZL |
181 | {"INT33FD", (kernel_ulong_t)&intel_soc_pmic_config_crc}, |
182 | { }, | |
183 | }; | |
184 | MODULE_DEVICE_TABLE(acpi, intel_soc_pmic_acpi_match); | |
52764fd9 | 185 | #endif |
51652384 ZL |
186 | |
187 | static struct i2c_driver intel_soc_pmic_i2c_driver = { | |
188 | .driver = { | |
189 | .name = "intel_soc_pmic_i2c", | |
51652384 ZL |
190 | .pm = &intel_soc_pmic_pm_ops, |
191 | .acpi_match_table = ACPI_PTR(intel_soc_pmic_acpi_match), | |
192 | }, | |
193 | .probe = intel_soc_pmic_i2c_probe, | |
194 | .remove = intel_soc_pmic_i2c_remove, | |
195 | .id_table = intel_soc_pmic_i2c_id, | |
196 | .shutdown = intel_soc_pmic_shutdown, | |
197 | }; | |
198 | ||
199 | module_i2c_driver(intel_soc_pmic_i2c_driver); | |
200 | ||
201 | MODULE_DESCRIPTION("I2C driver for Intel SoC PMIC"); | |
202 | MODULE_LICENSE("GPL v2"); | |
203 | MODULE_AUTHOR("Yang, Bin <bin.yang@intel.com>"); | |
204 | MODULE_AUTHOR("Zhu, Lejun <lejun.zhu@linux.intel.com>"); |