diff options
Diffstat (limited to 'arch/arm/plat-samsung/include/plat/gpio-core.h')
| -rw-r--r-- | arch/arm/plat-samsung/include/plat/gpio-core.h | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/arch/arm/plat-samsung/include/plat/gpio-core.h b/arch/arm/plat-samsung/include/plat/gpio-core.h deleted file mode 100644 index c0bfceb88340..000000000000 --- a/arch/arm/plat-samsung/include/plat/gpio-core.h +++ /dev/null @@ -1,142 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * Copyright 2008 Simtec Electronics - * http://armlinux.simtec.co.uk/ - * Ben Dooks <ben@simtec.co.uk> - * - * S3C Platform - GPIO core - */ - -#ifndef __PLAT_SAMSUNG_GPIO_CORE_H -#define __PLAT_SAMSUNG_GPIO_CORE_H - -/* Bring in machine-local definitions, especially S3C_GPIO_END */ -#include <mach/gpio-samsung.h> -#include <linux/gpio/driver.h> - -#define GPIOCON_OFF (0x00) -#define GPIODAT_OFF (0x04) - -#define con_4bit_shift(__off) ((__off) * 4) - -/* Define the core gpiolib support functions that the s3c platforms may - * need to extend or change depending on the hardware and the s3c chip - * selected at build or found at run time. - * - * These definitions are not intended for driver inclusion, there is - * nothing here that should not live outside the platform and core - * specific code. -*/ - -struct samsung_gpio_chip; - -/** - * struct samsung_gpio_pm - power management (suspend/resume) information - * @save: Routine to save the state of the GPIO block - * @resume: Routine to resume the GPIO block. - */ -struct samsung_gpio_pm { - void (*save)(struct samsung_gpio_chip *chip); - void (*resume)(struct samsung_gpio_chip *chip); -}; - -struct samsung_gpio_cfg; - -/** - * struct samsung_gpio_chip - wrapper for specific implementation of gpio - * @chip: The chip structure to be exported via gpiolib. - * @base: The base pointer to the gpio configuration registers. - * @group: The group register number for gpio interrupt support. - * @irq_base: The base irq number. - * @config: special function and pull-resistor control information. - * @lock: Lock for exclusive access to this gpio bank. - * @pm_save: Save information for suspend/resume support. - * @bitmap_gpio_int: Bitmap for representing GPIO interrupt or not. - * - * This wrapper provides the necessary information for the Samsung - * specific gpios being registered with gpiolib. - * - * The lock protects each gpio bank from multiple access of the shared - * configuration registers, or from reading of data whilst another thread - * is writing to the register set. - * - * Each chip has its own lock to avoid any contention between different - * CPU cores trying to get one lock for different GPIO banks, where each - * bank of GPIO has its own register space and configuration registers. - */ -struct samsung_gpio_chip { - struct gpio_chip chip; - struct samsung_gpio_cfg *config; - struct samsung_gpio_pm *pm; - void __iomem *base; - int irq_base; - int group; - spinlock_t lock; -#ifdef CONFIG_PM - u32 pm_save[4]; -#endif - u32 bitmap_gpio_int; -}; - -static inline struct samsung_gpio_chip *to_samsung_gpio(struct gpio_chip *gpc) -{ - return container_of(gpc, struct samsung_gpio_chip, chip); -} - -/** - * samsung_gpiolib_to_irq - convert gpio pin to irq number - * @chip: The gpio chip that the pin belongs to. - * @offset: The offset of the pin in the chip. - * - * This helper returns the irq number calculated from the chip->irq_base and - * the provided offset. - */ -extern int samsung_gpiolib_to_irq(struct gpio_chip *chip, unsigned int offset); - -/* exported for core SoC support to change */ -extern struct samsung_gpio_cfg s3c24xx_gpiocfg_default; - -#ifdef CONFIG_S3C_GPIO_TRACK -extern struct samsung_gpio_chip *s3c_gpios[S3C_GPIO_END]; - -static inline struct samsung_gpio_chip *samsung_gpiolib_getchip(unsigned int chip) -{ - return (chip < S3C_GPIO_END) ? s3c_gpios[chip] : NULL; -} -#else -/* machine specific code should provide samsung_gpiolib_getchip */ - -extern struct samsung_gpio_chip s3c24xx_gpios[]; - -static inline struct samsung_gpio_chip *samsung_gpiolib_getchip(unsigned int pin) -{ - struct samsung_gpio_chip *chip; - - if (pin > S3C_GPIO_END) - return NULL; - - chip = &s3c24xx_gpios[pin/32]; - return ((pin - chip->chip.base) < chip->chip.ngpio) ? chip : NULL; -} - -static inline void s3c_gpiolib_track(struct samsung_gpio_chip *chip) { } -#endif - -#ifdef CONFIG_PM -extern struct samsung_gpio_pm samsung_gpio_pm_1bit; -extern struct samsung_gpio_pm samsung_gpio_pm_2bit; -extern struct samsung_gpio_pm samsung_gpio_pm_4bit; -#define __gpio_pm(x) x -#else -#define samsung_gpio_pm_1bit NULL -#define samsung_gpio_pm_2bit NULL -#define samsung_gpio_pm_4bit NULL -#define __gpio_pm(x) NULL - -#endif /* CONFIG_PM */ - -/* locking wrappers to deal with multiple access to the same gpio bank */ -#define samsung_gpio_lock(_oc, _fl) spin_lock_irqsave(&(_oc)->lock, _fl) -#define samsung_gpio_unlock(_oc, _fl) spin_unlock_irqrestore(&(_oc)->lock, _fl) - -#endif /* __PLAT_SAMSUNG_GPIO_CORE_H */ |