diff options
| -rw-r--r-- | arch/sh/boards/Kconfig | 1 | ||||
| -rw-r--r-- | arch/sh/boards/mach-sdk7786/Makefile | 2 | ||||
| -rw-r--r-- | arch/sh/boards/mach-sdk7786/gpio.c | 49 |
3 files changed, 52 insertions, 0 deletions
diff --git a/arch/sh/boards/Kconfig b/arch/sh/boards/Kconfig index 90ed1ec6921..bb2cb27074e 100644 --- a/arch/sh/boards/Kconfig +++ b/arch/sh/boards/Kconfig @@ -155,6 +155,7 @@ config SH_SDK7786 depends on CPU_SUBTYPE_SH7786 select SYS_SUPPORTS_PCI select NO_IOPORT if !PCI + select ARCH_WANT_OPTIONAL_GPIOLIB help Select SDK7786 if configuring for a Renesas Technology Europe SH7786-65nm board. diff --git a/arch/sh/boards/mach-sdk7786/Makefile b/arch/sh/boards/mach-sdk7786/Makefile index a29f19e85b6..d0f801bd841 100644 --- a/arch/sh/boards/mach-sdk7786/Makefile +++ b/arch/sh/boards/mach-sdk7786/Makefile @@ -1 +1,3 @@ obj-y := setup.o fpga.o irq.o + +obj-$(CONFIG_GENERIC_GPIO) += gpio.o diff --git a/arch/sh/boards/mach-sdk7786/gpio.c b/arch/sh/boards/mach-sdk7786/gpio.c new file mode 100644 index 00000000000..f71ce09d4e1 --- /dev/null +++ b/arch/sh/boards/mach-sdk7786/gpio.c @@ -0,0 +1,49 @@ +/* + * SDK7786 FPGA USRGPIR Support. + * + * Copyright (C) 2010 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/gpio.h> +#include <linux/irq.h> +#include <linux/kernel.h> +#include <linux/spinlock.h> +#include <linux/io.h> +#include <mach/fpga.h> + +#define NR_FPGA_GPIOS 8 + +static const char *usrgpir_gpio_names[NR_FPGA_GPIOS] = { + "in0", "in1", "in2", "in3", "in4", "in5", "in6", "in7", +}; + +static int usrgpir_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) +{ + /* always in */ + return 0; +} + +static int usrgpir_gpio_get(struct gpio_chip *chip, unsigned gpio) +{ + return !!(fpga_read_reg(USRGPIR) & (1 << gpio)); +} + +static struct gpio_chip usrgpir_gpio_chip = { + .label = "sdk7786-fpga", + .names = usrgpir_gpio_names, + .direction_input = usrgpir_gpio_direction_input, + .get = usrgpir_gpio_get, + .base = -1, /* don't care */ + .ngpio = NR_FPGA_GPIOS, +}; + +static int __init usrgpir_gpio_setup(void) +{ + return gpiochip_add(&usrgpir_gpio_chip); +} +device_initcall(usrgpir_gpio_setup); |