From 991ff4e3d71dcad184d18f9b1b241f3191601909 Mon Sep 17 00:00:00 2001 From: Huacai Chen Date: Wed, 1 Apr 2015 10:20:08 +0800 Subject: MIPS: Move Loongson GPIO driver to drivers/gpio Move Loongson-2's GPIO driver to drivers/gpio and add Kconfig options. Acked-by: Ralf Baechle Signed-off-by: Huacai Chen Reviewed-by: Alexandre Courbot Signed-off-by: Linus Walleij --- drivers/gpio/Kconfig | 6 +++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-loongson.c | 105 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 112 insertions(+) create mode 100644 drivers/gpio/gpio-loongson.c (limited to 'drivers/gpio') diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 9b2d35092cda..473511ff676a 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -508,6 +508,12 @@ config GPIO_GRGPIO Select this to support Aeroflex Gaisler GRGPIO cores from the GRLIB VHDL IP core library. +config GPIO_LOONGSON + bool "Loongson-2 GPIO support" + depends on CPU_LOONGSON2 + help + driver for GPIO functionality on Loongson-2F processors. + config GPIO_TB10X bool select GENERIC_IRQ_CHIP diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index a452b14130cc..07b816b9b630 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -42,6 +42,7 @@ obj-$(CONFIG_GPIO_JANZ_TTL) += gpio-janz-ttl.o obj-$(CONFIG_GPIO_KEMPLD) += gpio-kempld.o obj-$(CONFIG_ARCH_KS8695) += gpio-ks8695.o obj-$(CONFIG_GPIO_INTEL_MID) += gpio-intel-mid.o +obj-$(CONFIG_GPIO_LOONGSON) += gpio-loongson.o obj-$(CONFIG_GPIO_LP3943) += gpio-lp3943.o obj-$(CONFIG_ARCH_LPC32XX) += gpio-lpc32xx.o obj-$(CONFIG_GPIO_LYNXPOINT) += gpio-lynxpoint.o diff --git a/drivers/gpio/gpio-loongson.c b/drivers/gpio/gpio-loongson.c new file mode 100644 index 000000000000..b4e69e0ed92b --- /dev/null +++ b/drivers/gpio/gpio-loongson.c @@ -0,0 +1,105 @@ +/* + * STLS2F GPIO Support + * + * Copyright (c) 2008 Richard Liu, STMicroelectronics + * Copyright (c) 2008-2010 Arnaud Patard + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#define STLS2F_N_GPIO 4 +#define STLS2F_GPIO_IN_OFFSET 16 + +static DEFINE_SPINLOCK(gpio_lock); + +static int ls2f_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) +{ + u32 temp; + u32 mask; + + spin_lock(&gpio_lock); + mask = 1 << gpio; + temp = LOONGSON_GPIOIE; + temp |= mask; + LOONGSON_GPIOIE = temp; + spin_unlock(&gpio_lock); + + return 0; +} + +static int ls2f_gpio_direction_output(struct gpio_chip *chip, + unsigned gpio, int level) +{ + u32 temp; + u32 mask; + + gpio_set_value(gpio, level); + spin_lock(&gpio_lock); + mask = 1 << gpio; + temp = LOONGSON_GPIOIE; + temp &= (~mask); + LOONGSON_GPIOIE = temp; + spin_unlock(&gpio_lock); + + return 0; +} + +static int ls2f_gpio_get_value(struct gpio_chip *chip, unsigned gpio) +{ + u32 val; + u32 mask; + + mask = 1 << (gpio + STLS2F_GPIO_IN_OFFSET); + spin_lock(&gpio_lock); + val = LOONGSON_GPIODATA; + spin_unlock(&gpio_lock); + + return (val & mask) != 0; +} + +static void ls2f_gpio_set_value(struct gpio_chip *chip, + unsigned gpio, int value) +{ + u32 val; + u32 mask; + + mask = 1 << gpio; + + spin_lock(&gpio_lock); + val = LOONGSON_GPIODATA; + if (value) + val |= mask; + else + val &= (~mask); + LOONGSON_GPIODATA = val; + spin_unlock(&gpio_lock); +} + +static struct gpio_chip ls2f_chip = { + .label = "ls2f", + .direction_input = ls2f_gpio_direction_input, + .get = ls2f_gpio_get_value, + .direction_output = ls2f_gpio_direction_output, + .set = ls2f_gpio_set_value, + .base = 0, + .ngpio = STLS2F_N_GPIO, + .can_sleep = false, +}; + +static int __init ls2f_gpio_setup(void) +{ + return gpiochip_add(&ls2f_chip); +} +arch_initcall(ls2f_gpio_setup); -- cgit v1.2.3-59-g8ed1b