diff options
Diffstat (limited to 'arch/mips/ath79/gpio.c')
| -rw-r--r-- | arch/mips/ath79/gpio.c | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/arch/mips/ath79/gpio.c b/arch/mips/ath79/gpio.c index a2f8ca630ed..29054f21183 100644 --- a/arch/mips/ath79/gpio.c +++ b/arch/mips/ath79/gpio.c @@ -1,9 +1,12 @@ /* * Atheros AR71XX/AR724X/AR913X GPIO API support * - * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org> + * Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com> + * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org> * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> * + * Parts of this file are based on Atheros' 2.6.15/2.6.31 BSP + * * 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. @@ -89,6 +92,42 @@ static int ath79_gpio_direction_output(struct gpio_chip *chip, return 0; } +static int ar934x_gpio_direction_input(struct gpio_chip *chip, unsigned offset) +{ + void __iomem *base = ath79_gpio_base; + unsigned long flags; + + spin_lock_irqsave(&ath79_gpio_lock, flags); + + __raw_writel(__raw_readl(base + AR71XX_GPIO_REG_OE) | (1 << offset), + base + AR71XX_GPIO_REG_OE); + + spin_unlock_irqrestore(&ath79_gpio_lock, flags); + + return 0; +} + +static int ar934x_gpio_direction_output(struct gpio_chip *chip, unsigned offset, + int value) +{ + void __iomem *base = ath79_gpio_base; + unsigned long flags; + + spin_lock_irqsave(&ath79_gpio_lock, flags); + + if (value) + __raw_writel(1 << offset, base + AR71XX_GPIO_REG_SET); + else + __raw_writel(1 << offset, base + AR71XX_GPIO_REG_CLEAR); + + __raw_writel(__raw_readl(base + AR71XX_GPIO_REG_OE) & ~(1 << offset), + base + AR71XX_GPIO_REG_OE); + + spin_unlock_irqrestore(&ath79_gpio_lock, flags); + + return 0; +} + static struct gpio_chip ath79_gpio_chip = { .label = "ath79", .get = ath79_gpio_get_value, @@ -155,11 +194,17 @@ void __init ath79_gpio_init(void) ath79_gpio_count = AR913X_GPIO_COUNT; else if (soc_is_ar933x()) ath79_gpio_count = AR933X_GPIO_COUNT; + else if (soc_is_ar934x()) + ath79_gpio_count = AR934X_GPIO_COUNT; else BUG(); ath79_gpio_base = ioremap_nocache(AR71XX_GPIO_BASE, AR71XX_GPIO_SIZE); ath79_gpio_chip.ngpio = ath79_gpio_count; + if (soc_is_ar934x()) { + ath79_gpio_chip.direction_input = ar934x_gpio_direction_input; + ath79_gpio_chip.direction_output = ar934x_gpio_direction_output; + } err = gpiochip_add(&ath79_gpio_chip); if (err) |