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14#ifndef __LINUX_OF_GPIO_H
15#define __LINUX_OF_GPIO_H
16
17#include <linux/compiler.h>
18#include <linux/kernel.h>
19#include <linux/errno.h>
20#include <linux/gpio.h>
21#include <linux/of.h>
22
23struct device_node;
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30enum of_gpio_flags {
31 OF_GPIO_ACTIVE_LOW = 0x1,
32};
33
34#ifdef CONFIG_OF_GPIO
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39struct of_mm_gpio_chip {
40 struct gpio_chip gc;
41 void (*save_regs)(struct of_mm_gpio_chip *mm_gc);
42 void __iomem *regs;
43};
44
45static inline struct of_mm_gpio_chip *to_of_mm_gpio_chip(struct gpio_chip *gc)
46{
47 return container_of(gc, struct of_mm_gpio_chip, gc);
48}
49
50extern int of_get_named_gpio_flags(struct device_node *np,
51 const char *list_name, int index, enum of_gpio_flags *flags);
52
53extern unsigned int of_gpio_named_count(struct device_node *np,
54 const char* propname);
55
56extern int of_mm_gpiochip_add(struct device_node *np,
57 struct of_mm_gpio_chip *mm_gc);
58
59extern void of_gpiochip_add(struct gpio_chip *gc);
60extern void of_gpiochip_remove(struct gpio_chip *gc);
61extern int of_gpio_simple_xlate(struct gpio_chip *gc,
62 const struct of_phandle_args *gpiospec,
63 u32 *flags);
64
65#else
66
67
68static inline int of_get_named_gpio_flags(struct device_node *np,
69 const char *list_name, int index, enum of_gpio_flags *flags)
70{
71 return -ENOSYS;
72}
73
74static inline unsigned int of_gpio_named_count(struct device_node *np,
75 const char* propname)
76{
77 return 0;
78}
79
80static inline int of_gpio_simple_xlate(struct gpio_chip *gc,
81 const struct of_phandle_args *gpiospec,
82 u32 *flags)
83{
84 return -ENOSYS;
85}
86
87static inline void of_gpiochip_add(struct gpio_chip *gc) { }
88static inline void of_gpiochip_remove(struct gpio_chip *gc) { }
89
90#endif
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108static inline unsigned int of_gpio_count(struct device_node *np)
109{
110 return of_gpio_named_count(np, "gpios");
111}
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123static inline int of_get_gpio_flags(struct device_node *np, int index,
124 enum of_gpio_flags *flags)
125{
126 return of_get_named_gpio_flags(np, "gpios", index, flags);
127}
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138static inline int of_get_named_gpio(struct device_node *np,
139 const char *propname, int index)
140{
141 return of_get_named_gpio_flags(np, propname, index, NULL);
142}
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152static inline int of_get_gpio(struct device_node *np, int index)
153{
154 return of_get_gpio_flags(np, index, NULL);
155}
156
157#endif
158