1 /* 2 * DaVinci GPIO Platform Related Defines 3 * 4 * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/ 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 as 8 * published by the Free Software Foundation version 2. 9 * 10 * This program is distributed "as is" WITHOUT ANY WARRANTY of any 11 * kind, whether express or implied; without even the implied warranty 12 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 */ 15 16 #ifndef __DAVINCI_GPIO_PLATFORM_H 17 #define __DAVINCI_GPIO_PLATFORM_H 18 19 #include <linux/io.h> 20 #include <linux/spinlock.h> 21 22 #include <asm-generic/gpio.h> 23 24 #define MAX_REGS_BANKS 5 25 #define MAX_INT_PER_BANK 32 26 27 struct davinci_gpio_platform_data { 28 u32 ngpio; 29 u32 gpio_unbanked; 30 }; 31 32 struct davinci_gpio_irq_data { 33 void __iomem *regs; 34 struct davinci_gpio_controller *chip; 35 int bank_num; 36 }; 37 38 struct davinci_gpio_controller { 39 struct gpio_chip chip; 40 struct irq_domain *irq_domain; 41 /* Serialize access to GPIO registers */ 42 spinlock_t lock; 43 void __iomem *regs[MAX_REGS_BANKS]; 44 int gpio_unbanked; 45 int irqs[MAX_INT_PER_BANK]; 46 unsigned int base; 47 }; 48 49 /* 50 * basic gpio routines 51 */ 52 #define GPIO(X) (X) /* 0 <= X <= (DAVINCI_N_GPIO - 1) */ 53 54 /* Convert GPIO signal to GPIO pin number */ 55 #define GPIO_TO_PIN(bank, gpio) (16 * (bank) + (gpio)) 56 __gpio_mask(unsigned gpio)57static inline u32 __gpio_mask(unsigned gpio) 58 { 59 return 1 << (gpio % 32); 60 } 61 #endif 62
