From b8e11c0184abda5a5e47d2e5906482ca58809175 Mon Sep 17 00:00:00 2001 From: Jarkko Nikula Date: Thu, 30 Oct 2008 00:38:34 -0700 Subject: [PATCH] make legacy gpio request/free calls superfluous (OMAP and mainline) Clean up OMAP GPIO request/free functions - Rename and declare static OMAP specific GPIO request/free functions - Register them into gpiolib as chip-specific hooks - Add omap_request_gpio/omap_free_gpio wrappers for existing code not converted yet to use gpiolib Signed-off-by: Jarkko Nikula [ dbrownell@users.sourceforge.net: remove needless check_gpio() calls ] Signed-off-by: David Brownell Signed-off-by: Tony Lindgren --- arch/arm/plat-omap/gpio.c | 43 +++++++------------------- arch/arm/plat-omap/include/mach/gpio.h | 12 +++++-- 2 files changed, 21 insertions(+), 34 deletions(-) diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c index e9954a4e78d..3928b818bf9 100644 --- a/arch/arm/plat-omap/gpio.c +++ b/arch/arm/plat-omap/gpio.c @@ -885,26 +885,17 @@ static int gpio_wake_enable(unsigned int irq, unsigned int enable) return retval; } -int omap_request_gpio(int gpio) +static int omap_gpio_request(struct gpio_chip *chip, unsigned offset) { - struct gpio_bank *bank; + struct gpio_bank *bank = container_of(chip, struct gpio_bank, chip); unsigned long flags; - int status; - - if (check_gpio(gpio) < 0) - return -EINVAL; - - status = gpio_request(gpio, NULL); - if (status < 0) - return status; - bank = get_gpio_bank(gpio); spin_lock_irqsave(&bank->lock, flags); /* Set trigger to none. You need to enable the desired trigger with * request_irq() or set_irq_type(). */ - _set_gpio_triggering(bank, get_gpio_index(gpio), IRQ_TYPE_NONE); + _set_gpio_triggering(bank, offset, IRQ_TYPE_NONE); #ifdef CONFIG_ARCH_OMAP15XX if (bank->method == METHOD_GPIO_1510) { @@ -912,7 +903,7 @@ int omap_request_gpio(int gpio) /* Claim the pin for MPU */ reg = bank->base + OMAP1510_GPIO_PIN_CONTROL; - __raw_writel(__raw_readl(reg) | (1 << get_gpio_index(gpio)), reg); + __raw_writel(__raw_readl(reg) | (1 << offset), reg); } #endif spin_unlock_irqrestore(&bank->lock, flags); @@ -920,39 +911,28 @@ int omap_request_gpio(int gpio) return 0; } -void omap_free_gpio(int gpio) +static void omap_gpio_free(struct gpio_chip *chip, unsigned offset) { - struct gpio_bank *bank; + struct gpio_bank *bank = container_of(chip, struct gpio_bank, chip); unsigned long flags; - if (check_gpio(gpio) < 0) - return; - bank = get_gpio_bank(gpio); spin_lock_irqsave(&bank->lock, flags); - if (unlikely(!gpiochip_is_requested(&bank->chip, - get_gpio_index(gpio)))) { - spin_unlock_irqrestore(&bank->lock, flags); - printk(KERN_ERR "omap-gpio: GPIO %d wasn't reserved!\n", gpio); - dump_stack(); - return; - } #ifdef CONFIG_ARCH_OMAP16XX if (bank->method == METHOD_GPIO_1610) { /* Disable wake-up during idle for dynamic tick */ void __iomem *reg = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA; - __raw_writel(1 << get_gpio_index(gpio), reg); + __raw_writel(1 << offset, reg); } #endif #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) if (bank->method == METHOD_GPIO_24XX) { /* Disable wake-up during idle for dynamic tick */ void __iomem *reg = bank->base + OMAP24XX_GPIO_CLEARWKUENA; - __raw_writel(1 << get_gpio_index(gpio), reg); + __raw_writel(1 << offset, reg); } #endif - _reset_gpio(bank, gpio); + _reset_gpio(bank, bank->chip.base + offset); spin_unlock_irqrestore(&bank->lock, flags); - gpio_free(gpio); } /* @@ -1457,6 +1437,8 @@ static int __init _omap_gpio_init(void) /* REVISIT eventually switch from OMAP-specific gpio structs * over to the generic ones */ + bank->chip.request = omap_gpio_request; + bank->chip.free = omap_gpio_free; bank->chip.direction_input = gpio_input; bank->chip.get = gpio_get; bank->chip.direction_output = gpio_output; @@ -1725,9 +1707,6 @@ static int __init omap_gpio_sysinit(void) return ret; } -EXPORT_SYMBOL(omap_request_gpio); -EXPORT_SYMBOL(omap_free_gpio); - arch_initcall(omap_gpio_sysinit); diff --git a/arch/arm/plat-omap/include/mach/gpio.h b/arch/arm/plat-omap/include/mach/gpio.h index 552ad0c0ac4..04e68e88f13 100644 --- a/arch/arm/plat-omap/include/mach/gpio.h +++ b/arch/arm/plat-omap/include/mach/gpio.h @@ -71,8 +71,6 @@ IH_GPIO_BASE + (nr)) extern int omap_gpio_init(void); /* Call from board init only */ -extern int omap_request_gpio(int gpio); -extern void omap_free_gpio(int gpio); extern void omap2_gpio_prepare_for_retention(void); extern void omap2_gpio_resume_after_retention(void); extern void omap_set_gpio_debounce(int gpio, int enable); @@ -89,6 +87,16 @@ extern void omap_set_gpio_debounce_time(int gpio, int enable); #include #include +static inline int omap_request_gpio(int gpio) +{ + return gpio_request(gpio, "FIXME"); +} + +static inline void omap_free_gpio(int gpio) +{ + gpio_free(gpio); +} + static inline int gpio_get_value(unsigned gpio) { return __gpio_get_value(gpio); -- 2.41.0