45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
/*
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* OF helpers for the GPIO API
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*
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* based on Linux OF_GPIO API
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __OF_GPIO_H
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#define __OF_GPIO_H
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/*
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* This is Linux-specific flags. By default controllers' and Linux' mapping
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* match, but GPIO controllers are free to translate their own flags to
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* Linux-specific in their .xlate callback. Though, 1:1 mapping is recommended.
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*/
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enum of_gpio_flags {
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OF_GPIO_ACTIVE_LOW = 0x1,
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};
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#ifdef CONFIG_OF_GPIO
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extern int of_get_named_gpio_flags(struct device_node *np,
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const char *list_name, int index, enum of_gpio_flags *flags);
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#else /* CONFIG_OF_GPIO */
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static inline int of_get_named_gpio_flags(struct device_node *np,
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const char *list_name, int index, enum of_gpio_flags *flags)
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{
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return -ENOSYS;
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}
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#endif /* CONFIG_OF_GPIO */
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static inline int of_get_named_gpio(struct device_node *np,
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const char *list_name, int index)
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{
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return of_get_named_gpio_flags(np, list_name, index, NULL);
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}
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#endif
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