| 1 | /* |
| 2 | * Ralink SoC specific GPIO support |
| 3 | * |
| 4 | * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License version 2 as published |
| 8 | * by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | #ifndef _RAMIPS_GPIO_H |
| 12 | #define _RAMIPS_GPIO_H |
| 13 | |
| 14 | #include <linux/gpio.h> |
| 15 | #include <linux/spinlock.h> |
| 16 | |
| 17 | enum ramips_gpio_reg { |
| 18 | RAMIPS_GPIO_REG_INT = 0, /* Interrupt status */ |
| 19 | RAMIPS_GPIO_REG_EDGE, |
| 20 | RAMIPS_GPIO_REG_RENA, |
| 21 | RAMIPS_GPIO_REG_FENA, |
| 22 | RAMIPS_GPIO_REG_DATA, |
| 23 | RAMIPS_GPIO_REG_DIR, /* Direction, 0:in, 1: out */ |
| 24 | RAMIPS_GPIO_REG_POL, /* Polarity, 0: normal, 1: invert */ |
| 25 | RAMIPS_GPIO_REG_SET, |
| 26 | RAMIPS_GPIO_REG_RESET, |
| 27 | RAMIPS_GPIO_REG_TOGGLE, |
| 28 | RAMIPS_GPIO_REG_MAX |
| 29 | }; |
| 30 | |
| 31 | struct ramips_gpio_chip { |
| 32 | struct gpio_chip chip; |
| 33 | unsigned long map_base; |
| 34 | unsigned long map_size; |
| 35 | u8 regs[RAMIPS_GPIO_REG_MAX]; |
| 36 | |
| 37 | spinlock_t lock; |
| 38 | void __iomem *regs_base; |
| 39 | }; |
| 40 | |
| 41 | struct ramips_gpio_data { |
| 42 | unsigned int num_chips; |
| 43 | struct ramips_gpio_chip *chips; |
| 44 | }; |
| 45 | |
| 46 | int ramips_gpio_init(struct ramips_gpio_data *data); |
| 47 | |
| 48 | #endif /* _RAMIPS_GPIO_H */ |
| 49 | |
