1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * ACPI helpers for GPIO API
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2012,2019 Intel Corporation
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #ifndef GPIOLIB_ACPI_H
9*4882a593Smuzhiyun #define GPIOLIB_ACPI_H
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun struct acpi_device;
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun /**
14*4882a593Smuzhiyun * struct acpi_gpio_info - ACPI GPIO specific information
15*4882a593Smuzhiyun * @adev: reference to ACPI device which consumes GPIO resource
16*4882a593Smuzhiyun * @flags: GPIO initialization flags
17*4882a593Smuzhiyun * @gpioint: if %true this GPIO is of type GpioInt otherwise type is GpioIo
18*4882a593Smuzhiyun * @pin_config: pin bias as provided by ACPI
19*4882a593Smuzhiyun * @polarity: interrupt polarity as provided by ACPI
20*4882a593Smuzhiyun * @triggering: triggering type as provided by ACPI
21*4882a593Smuzhiyun * @quirks: Linux specific quirks as provided by struct acpi_gpio_mapping
22*4882a593Smuzhiyun */
23*4882a593Smuzhiyun struct acpi_gpio_info {
24*4882a593Smuzhiyun struct acpi_device *adev;
25*4882a593Smuzhiyun enum gpiod_flags flags;
26*4882a593Smuzhiyun bool gpioint;
27*4882a593Smuzhiyun int pin_config;
28*4882a593Smuzhiyun int polarity;
29*4882a593Smuzhiyun int triggering;
30*4882a593Smuzhiyun unsigned int quirks;
31*4882a593Smuzhiyun };
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun #ifdef CONFIG_ACPI
34*4882a593Smuzhiyun void acpi_gpiochip_add(struct gpio_chip *chip);
35*4882a593Smuzhiyun void acpi_gpiochip_remove(struct gpio_chip *chip);
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
38*4882a593Smuzhiyun void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun int acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags,
41*4882a593Smuzhiyun struct acpi_gpio_info *info);
42*4882a593Smuzhiyun int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
43*4882a593Smuzhiyun struct acpi_gpio_info *info);
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun struct gpio_desc *acpi_find_gpio(struct device *dev,
46*4882a593Smuzhiyun const char *con_id,
47*4882a593Smuzhiyun unsigned int idx,
48*4882a593Smuzhiyun enum gpiod_flags *dflags,
49*4882a593Smuzhiyun unsigned long *lookupflags);
50*4882a593Smuzhiyun struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode,
51*4882a593Smuzhiyun const char *propname, int index,
52*4882a593Smuzhiyun struct acpi_gpio_info *info);
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun int acpi_gpio_count(struct device *dev, const char *con_id);
55*4882a593Smuzhiyun #else
acpi_gpiochip_add(struct gpio_chip * chip)56*4882a593Smuzhiyun static inline void acpi_gpiochip_add(struct gpio_chip *chip) { }
acpi_gpiochip_remove(struct gpio_chip * chip)57*4882a593Smuzhiyun static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { }
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun static inline void
acpi_gpiochip_request_interrupts(struct gpio_chip * chip)60*4882a593Smuzhiyun acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { }
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun static inline void
acpi_gpiochip_free_interrupts(struct gpio_chip * chip)63*4882a593Smuzhiyun acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { }
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun static inline int
acpi_gpio_update_gpiod_flags(enum gpiod_flags * flags,struct acpi_gpio_info * info)66*4882a593Smuzhiyun acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, struct acpi_gpio_info *info)
67*4882a593Smuzhiyun {
68*4882a593Smuzhiyun return 0;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun static inline int
acpi_gpio_update_gpiod_lookup_flags(unsigned long * lookupflags,struct acpi_gpio_info * info)71*4882a593Smuzhiyun acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
72*4882a593Smuzhiyun struct acpi_gpio_info *info)
73*4882a593Smuzhiyun {
74*4882a593Smuzhiyun return 0;
75*4882a593Smuzhiyun }
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun static inline struct gpio_desc *
acpi_find_gpio(struct device * dev,const char * con_id,unsigned int idx,enum gpiod_flags * dflags,unsigned long * lookupflags)78*4882a593Smuzhiyun acpi_find_gpio(struct device *dev, const char *con_id,
79*4882a593Smuzhiyun unsigned int idx, enum gpiod_flags *dflags,
80*4882a593Smuzhiyun unsigned long *lookupflags)
81*4882a593Smuzhiyun {
82*4882a593Smuzhiyun return ERR_PTR(-ENOENT);
83*4882a593Smuzhiyun }
84*4882a593Smuzhiyun static inline struct gpio_desc *
acpi_node_get_gpiod(struct fwnode_handle * fwnode,const char * propname,int index,struct acpi_gpio_info * info)85*4882a593Smuzhiyun acpi_node_get_gpiod(struct fwnode_handle *fwnode, const char *propname,
86*4882a593Smuzhiyun int index, struct acpi_gpio_info *info)
87*4882a593Smuzhiyun {
88*4882a593Smuzhiyun return ERR_PTR(-ENXIO);
89*4882a593Smuzhiyun }
acpi_gpio_count(struct device * dev,const char * con_id)90*4882a593Smuzhiyun static inline int acpi_gpio_count(struct device *dev, const char *con_id)
91*4882a593Smuzhiyun {
92*4882a593Smuzhiyun return -ENODEV;
93*4882a593Smuzhiyun }
94*4882a593Smuzhiyun #endif
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun #endif /* GPIOLIB_ACPI_H */
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