diff options
| -rw-r--r-- | arch/arm/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/mach-sa1100/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/mach-sa1100/generic.c | 31 | ||||
| -rw-r--r-- | arch/arm/mach-sa1100/generic.h | 1 | ||||
| -rw-r--r-- | arch/arm/mach-sa1100/gpio.c | 65 | ||||
| -rw-r--r-- | arch/arm/mach-sa1100/irq.c | 2 | ||||
| -rw-r--r-- | include/asm-arm/arch-sa1100/gpio.h | 31 |
7 files changed, 82 insertions, 51 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 4039a133006e..1f7c728f5ce5 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -426,6 +426,7 @@ config ARCH_SA1100 select GENERIC_GPIO select GENERIC_TIME select HAVE_IDE + select HAVE_GPIO_LIB help Support for StrongARM 11x0 based boards. diff --git a/arch/arm/mach-sa1100/Makefile b/arch/arm/mach-sa1100/Makefile index 7a61e8d33ab7..8e0244631d65 100644 --- a/arch/arm/mach-sa1100/Makefile +++ b/arch/arm/mach-sa1100/Makefile @@ -3,7 +3,7 @@ # # Common support -obj-y := clock.o generic.o irq.o dma.o time.o #nmi-oopser.o +obj-y := clock.o generic.o gpio.o irq.o dma.o time.o #nmi-oopser.o obj-m := obj-n := obj- := diff --git a/arch/arm/mach-sa1100/generic.c b/arch/arm/mach-sa1100/generic.c index 5c84c604ed86..0c2fa1c4fb4c 100644 --- a/arch/arm/mach-sa1100/generic.c +++ b/arch/arm/mach-sa1100/generic.c @@ -139,37 +139,6 @@ unsigned long long sched_clock(void) return v; } -int gpio_direction_input(unsigned gpio) -{ - unsigned long flags; - - if (gpio > GPIO_MAX) - return -EINVAL; - - local_irq_save(flags); - GPDR &= ~GPIO_GPIO(gpio); - local_irq_restore(flags); - return 0; -} - -EXPORT_SYMBOL(gpio_direction_input); - -int gpio_direction_output(unsigned gpio, int value) -{ - unsigned long flags; - - if (gpio > GPIO_MAX) - return -EINVAL; - - local_irq_save(flags); - gpio_set_value(gpio, value); - GPDR |= GPIO_GPIO(gpio); - local_irq_restore(flags); - return 0; -} - -EXPORT_SYMBOL(gpio_direction_output); - /* * Default power-off for SA1100 */ diff --git a/arch/arm/mach-sa1100/generic.h b/arch/arm/mach-sa1100/generic.h index f085d68e568e..793c2e6c991f 100644 --- a/arch/arm/mach-sa1100/generic.h +++ b/arch/arm/mach-sa1100/generic.h @@ -9,6 +9,7 @@ struct sys_timer; extern struct sys_timer sa1100_timer; extern void __init sa1100_map_io(void); extern void __init sa1100_init_irq(void); +extern void __init sa1100_init_gpio(void); #define SET_BANK(__nr,__start,__size) \ mi->bank[__nr].start = (__start), \ diff --git a/arch/arm/mach-sa1100/gpio.c b/arch/arm/mach-sa1100/gpio.c new file mode 100644 index 000000000000..372f1f4f54a1 --- /dev/null +++ b/arch/arm/mach-sa1100/gpio.c @@ -0,0 +1,65 @@ +/* + * linux/arch/arm/mach-sa1100/gpio.c + * + * Generic SA-1100 GPIO handling + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/init.h> +#include <linux/module.h> + +#include <asm/gpio.h> +#include <asm/hardware.h> +#include "generic.h" + +static int sa1100_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + return GPLR & GPIO_GPIO(offset); +} + +static void sa1100_gpio_set(struct gpio_chip *chip, unsigned offset, int value) +{ + if (value) + GPSR = GPIO_GPIO(offset); + else + GPCR = GPIO_GPIO(offset); +} + +static int sa1100_direction_input(struct gpio_chip *chip, unsigned offset) +{ + unsigned long flags; + + local_irq_save(flags); + GPDR &= ~GPIO_GPIO(offset); + local_irq_restore(flags); + return 0; +} + +static int sa1100_direction_output(struct gpio_chip *chip, unsigned offset, int value) +{ + unsigned long flags; + + local_irq_save(flags); + sa1100_gpio_set(chip, offset, value); + GPDR |= GPIO_GPIO(offset); + local_irq_restore(flags); + return 0; +} + +static struct gpio_chip sa1100_gpio_chip = { + .label = "gpio", + .direction_input = sa1100_direction_input, + .direction_output = sa1100_direction_output, + .set = sa1100_gpio_set, + .get = sa1100_gpio_get, + .base = 0, + .ngpio = GPIO_MAX + 1, +}; + +void __init sa1100_init_gpio(void) +{ + gpiochip_add(&sa1100_gpio_chip); +} diff --git a/arch/arm/mach-sa1100/irq.c b/arch/arm/mach-sa1100/irq.c index 3dc17d7bf38e..fa0403af7eec 100644 --- a/arch/arm/mach-sa1100/irq.c +++ b/arch/arm/mach-sa1100/irq.c @@ -347,4 +347,6 @@ void __init sa1100_init_irq(void) */ set_irq_chip(IRQ_GPIO11_27, &sa1100_normal_chip); set_irq_chained_handler(IRQ_GPIO11_27, sa1100_high_gpio_handler); + + sa1100_init_gpio(); } diff --git a/include/asm-arm/arch-sa1100/gpio.h b/include/asm-arm/arch-sa1100/gpio.h index e7a9d26e22a8..93d3395b102d 100644 --- a/include/asm-arm/arch-sa1100/gpio.h +++ b/include/asm-arm/arch-sa1100/gpio.h @@ -26,35 +26,28 @@ #include <asm/hardware.h> #include <asm/irq.h> - -static inline int gpio_request(unsigned gpio, const char *label) -{ - return 0; -} - -static inline void gpio_free(unsigned gpio) -{ - return; -} - -extern int gpio_direction_input(unsigned gpio); -extern int gpio_direction_output(unsigned gpio, int value); - +#include <asm-generic/gpio.h> static inline int gpio_get_value(unsigned gpio) { - return GPLR & GPIO_GPIO(gpio); + if (__builtin_constant_p(gpio) && (gpio <= GPIO_MAX)) + return GPLR & GPIO_GPIO(gpio); + else + return __gpio_get_value(gpio); } static inline void gpio_set_value(unsigned gpio, int value) { - if (value) - GPSR = GPIO_GPIO(gpio); + if (__builtin_constant_p(gpio) && (gpio <= GPIO_MAX)) + if (value) + GPSR = GPIO_GPIO(gpio); + else + GPCR = GPIO_GPIO(gpio); else - GPCR = GPIO_GPIO(gpio); + __gpio_set_value(gpio, value); } -#include <asm-generic/gpio.h> /* cansleep wrappers */ +#define gpio_cansleep __gpio_cansleep static inline unsigned gpio_to_irq(unsigned gpio) { |