diff options
Diffstat (limited to 'drivers/gpio/gpio-omap.c')
| -rw-r--r-- | drivers/gpio/gpio-omap.c | 1545 |
1 files changed, 1545 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c new file mode 100644 index 00000000..44615406 --- /dev/null +++ b/drivers/gpio/gpio-omap.c @@ -0,0 +1,1545 @@ +/* + * Support functions for OMAP GPIO + * + * Copyright (C) 2003-2005 Nokia Corporation + * Written by Juha Yrjölä <juha.yrjola@nokia.com> + * + * Copyright (C) 2009 Texas Instruments + * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com> + * + * 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 <linux/interrupt.h> +#include <linux/syscore_ops.h> +#include <linux/err.h> +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/device.h> +#include <linux/pm_runtime.h> +#include <linux/pm.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/irqdomain.h> + +#include <mach/hardware.h> +#include <asm/irq.h> +#include <mach/irqs.h> +#include <asm/gpio.h> +#include <asm/mach/irq.h> + +#define OFF_MODE 1 + +static LIST_HEAD(omap_gpio_list); + +struct gpio_regs { + u32 irqenable1; + u32 irqenable2; + u32 wake_en; + u32 ctrl; + u32 oe; + u32 leveldetect0; + u32 leveldetect1; + u32 risingdetect; + u32 fallingdetect; + u32 dataout; + u32 debounce; + u32 debounce_en; +}; + +struct gpio_bank { + struct list_head node; + void __iomem *base; + u16 irq; + int irq_base; + struct irq_domain *domain; + u32 suspend_wakeup; + u32 saved_wakeup; + u32 non_wakeup_gpios; + u32 enabled_non_wakeup_gpios; + struct gpio_regs context; + u32 saved_datain; + u32 saved_fallingdetect; + u32 saved_risingdetect; + u32 level_mask; + u32 toggle_mask; + spinlock_t lock; + struct gpio_chip chip; + struct clk *dbck; + u32 mod_usage; + u32 dbck_enable_mask; + bool dbck_enabled; + struct device *dev; + bool is_mpuio; + bool dbck_flag; + bool loses_context; + int stride; + u32 width; + int context_loss_count; + int power_mode; + bool workaround_enabled; + + void (*set_dataout)(struct gpio_bank *bank, int gpio, int enable); + int (*get_context_loss_count)(struct device *dev); + + struct omap_gpio_reg_offs *regs; +}; + +#define GPIO_INDEX(bank, gpio) (gpio % bank->width) +#define GPIO_BIT(bank, gpio) (1 << GPIO_INDEX(bank, gpio)) +#define GPIO_MOD_CTRL_BIT BIT(0) + +static int irq_to_gpio(struct gpio_bank *bank, unsigned int gpio_irq) +{ + return gpio_irq - bank->irq_base + bank->chip.base; +} + +static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input) +{ + void __iomem *reg = bank->base; + u32 l; + + reg += bank->regs->direction; + l = __raw_readl(reg); + if (is_input) + l |= 1 << gpio; + else + l &= ~(1 << gpio); + __raw_writel(l, reg); + bank->context.oe = l; +} + + +/* set data out value using dedicate set/clear register */ +static void _set_gpio_dataout_reg(struct gpio_bank *bank, int gpio, int enable) +{ + void __iomem *reg = bank->base; + u32 l = GPIO_BIT(bank, gpio); + + if (enable) { + reg += bank->regs->set_dataout; + bank->context.dataout |= l; + } else { + reg += bank->regs->clr_dataout; + bank->context.dataout &= ~l; + } + + __raw_writel(l, reg); +} + +/* set data out value using mask register */ +static void _set_gpio_dataout_mask(struct gpio_bank *bank, int gpio, int enable) +{ + void __iomem *reg = bank->base + bank->regs->dataout; + u32 gpio_bit = GPIO_BIT(bank, gpio); + u32 l; + + l = __raw_readl(reg); + if (enable) + l |= gpio_bit; + else + l &= ~gpio_bit; + __raw_writel(l, reg); + bank->context.dataout = l; +} + +static int _get_gpio_datain(struct gpio_bank *bank, int offset) +{ + void __iomem *reg = bank->base + bank->regs->datain; + + return (__raw_readl(reg) & (1 << offset)) != 0; +} + +static int _get_gpio_dataout(struct gpio_bank *bank, int offset) +{ + void __iomem *reg = bank->base + bank->regs->dataout; + + return (__raw_readl(reg) & (1 << offset)) != 0; +} + +static inline void _gpio_rmw(void __iomem *base, u32 reg, u32 mask, bool set) +{ + int l = __raw_readl(base + reg); + + if (set) + l |= mask; + else + l &= ~mask; + + __raw_writel(l, base + reg); +} + +static inline void _gpio_dbck_enable(struct gpio_bank *bank) +{ + if (bank->dbck_enable_mask && !bank->dbck_enabled) { + clk_enable(bank->dbck); + bank->dbck_enabled = true; + } +} + +static inline void _gpio_dbck_disable(struct gpio_bank *bank) +{ + if (bank->dbck_enable_mask && bank->dbck_enabled) { + clk_disable(bank->dbck); + bank->dbck_enabled = false; + } +} + +/** + * _set_gpio_debounce - low level gpio debounce time + * @bank: the gpio bank we're acting upon + * @gpio: the gpio number on this @gpio + * @debounce: debounce time to use + * + * OMAP's debounce time is in 31us steps so we need + * to convert and round up to the closest unit. + */ +static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio, + unsigned debounce) +{ + void __iomem *reg; + u32 val; + u32 l; + + if (!bank->dbck_flag) + return; + + if (debounce < 32) + debounce = 0x01; + else if (debounce > 7936) + debounce = 0xff; + else + debounce = (debounce / 0x1f) - 1; + + l = GPIO_BIT(bank, gpio); + + clk_enable(bank->dbck); + reg = bank->base + bank->regs->debounce; + __raw_writel(debounce, reg); + + reg = bank->base + bank->regs->debounce_en; + val = __raw_readl(reg); + + if (debounce) + val |= l; + else + val &= ~l; + bank->dbck_enable_mask = val; + + __raw_writel(val, reg); + clk_disable(bank->dbck); + /* + * Enable debounce clock per module. + * This call is mandatory because in omap_gpio_request() when + * *_runtime_get_sync() is called, _gpio_dbck_enable() within + * runtime callbck fails to turn on dbck because dbck_enable_mask + * used within _gpio_dbck_enable() is still not initialized at + * that point. Therefore we have to enable dbck here. + */ + _gpio_dbck_enable(bank); + if (bank->dbck_enable_mask) { + bank->context.debounce = debounce; + bank->context.debounce_en = val; + } +} + +static inline void set_gpio_trigger(struct gpio_bank *bank, int gpio, + unsigned trigger) +{ + void __iomem *base = bank->base; + u32 gpio_bit = 1 << gpio; + + _gpio_rmw(base, bank->regs->leveldetect0, gpio_bit, + trigger & IRQ_TYPE_LEVEL_LOW); + _gpio_rmw(base, bank->regs->leveldetect1, gpio_bit, + trigger & IRQ_TYPE_LEVEL_HIGH); + _gpio_rmw(base, bank->regs->risingdetect, gpio_bit, + trigger & IRQ_TYPE_EDGE_RISING); + _gpio_rmw(base, bank->regs->fallingdetect, gpio_bit, + trigger & IRQ_TYPE_EDGE_FALLING); + + bank->context.leveldetect0 = + __raw_readl(bank->base + bank->regs->leveldetect0); + bank->context.leveldetect1 = + __raw_readl(bank->base + bank->regs->leveldetect1); + bank->context.risingdetect = + __raw_readl(bank->base + bank->regs->risingdetect); + bank->context.fallingdetect = + __raw_readl(bank->base + bank->regs->fallingdetect); + + if (likely(!(bank->non_wakeup_gpios & gpio_bit))) { + _gpio_rmw(base, bank->regs->wkup_en, gpio_bit, trigger != 0); + bank->context.wake_en = + __raw_readl(bank->base + bank->regs->wkup_en); + } + + /* This part needs to be executed always for OMAP{34xx, 44xx} */ + if (!bank->regs->irqctrl) { + /* On omap24xx proceed only when valid GPIO bit is set */ + if (bank->non_wakeup_gpios) { + if (!(bank->non_wakeup_gpios & gpio_bit)) + goto exit; + } + + /* + * Log the edge gpio and manually trigger the IRQ + * after resume if the input level changes + * to avoid irq lost during PER RET/OFF mode + * Applies for omap2 non-wakeup gpio and all omap3 gpios + */ + if (trigger & IRQ_TYPE_EDGE_BOTH) + bank->enabled_non_wakeup_gpios |= gpio_bit; + else + bank->enabled_non_wakeup_gpios &= ~gpio_bit; + } + +exit: + bank->level_mask = + __raw_readl(bank->base + bank->regs->leveldetect0) | + __raw_readl(bank->base + bank->regs->leveldetect1); +} + +#ifdef CONFIG_ARCH_OMAP1 +/* + * This only applies to chips that can't do both rising and falling edge + * detection at once. For all other chips, this function is a noop. + */ +static void _toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio) +{ + void __iomem *reg = bank->base; + u32 l = 0; + + if (!bank->regs->irqctrl) + return; + + reg += bank->regs->irqctrl; + + l = __raw_readl(reg); + if ((l >> gpio) & 1) + l &= ~(1 << gpio); + else + l |= 1 << gpio; + + __raw_writel(l, reg); +} +#else +static void _toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio) {} +#endif + +static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, + unsigned trigger) +{ + void __iomem *reg = bank->base; + void __iomem *base = bank->base; + u32 l = 0; + + if (bank->regs->leveldetect0 && bank->regs->wkup_en) { + set_gpio_trigger(bank, gpio, trigger); + } else if (bank->regs->irqctrl) { + reg += bank->regs->irqctrl; + + l = __raw_readl(reg); + if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) + bank->toggle_mask |= 1 << gpio; + if (trigger & IRQ_TYPE_EDGE_RISING) + l |= 1 << gpio; + else if (trigger & IRQ_TYPE_EDGE_FALLING) + l &= ~(1 << gpio); + else + return -EINVAL; + + __raw_writel(l, reg); + } else if (bank->regs->edgectrl1) { + if (gpio & 0x08) + reg += bank->regs->edgectrl2; + else + reg += bank->regs->edgectrl1; + + gpio &= 0x07; + l = __raw_readl(reg); + l &= ~(3 << (gpio << 1)); + if (trigger & IRQ_TYPE_EDGE_RISING) + l |= 2 << (gpio << 1); + if (trigger & IRQ_TYPE_EDGE_FALLING) + l |= 1 << (gpio << 1); + + /* Enable wake-up during idle for dynamic tick */ + _gpio_rmw(base, bank->regs->wkup_en, 1 << gpio, trigger); + bank->context.wake_en = + __raw_readl(bank->base + bank->regs->wkup_en); + __raw_writel(l, reg); + } + return 0; +} + +static int gpio_irq_type(struct irq_data *d, unsigned type) +{ + struct gpio_bank *bank = irq_data_get_irq_chip_data(d); + unsigned gpio; + int retval; + unsigned long flags; + + if (!cpu_class_is_omap2() && d->irq > IH_MPUIO_BASE) + gpio = OMAP_MPUIO(d->irq - IH_MPUIO_BASE); + else + gpio = irq_to_gpio(bank, d->irq); + + if (type & ~IRQ_TYPE_SENSE_MASK) + return -EINVAL; + + if (!bank->regs->leveldetect0 && + (type & (IRQ_TYPE_LEVEL_LOW|IRQ_TYPE_LEVEL_HIGH))) + return -EINVAL; + + spin_lock_irqsave(&bank->lock, flags); + retval = _set_gpio_triggering(bank, GPIO_INDEX(bank, gpio), type); + spin_unlock_irqrestore(&bank->lock, flags); + + if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH)) + __irq_set_handler_locked(d->irq, handle_level_irq); + else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)) + __irq_set_handler_locked(d->irq, handle_edge_irq); + + return retval; +} + +static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask) +{ + void __iomem *reg = bank->base; + + reg += bank->regs->irqstatus; + __raw_writel(gpio_mask, reg); + + /* Workaround for clearing DSP GPIO interrupts to allow retention */ + if (bank->regs->irqstatus2) { + reg = bank->base + bank->regs->irqstatus2; + __raw_writel(gpio_mask, reg); + } + + /* Flush posted write for the irq status to avoid spurious interrupts */ + __raw_readl(reg); +} + +static inline void _clear_gpio_irqstatus(struct gpio_bank *bank, int gpio) +{ + _clear_gpio_irqbank(bank, GPIO_BIT(bank, gpio)); +} + +static u32 _get_gpio_irqbank_mask(struct gpio_bank *bank) +{ + void __iomem *reg = bank->base; + u32 l; + u32 mask = (1 << bank->width) - 1; + + reg += bank->regs->irqenable; + l = __raw_readl(reg); + if (bank->regs->irqenable_inv) + l = ~l; + l &= mask; + return l; +} + +static void _enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask) +{ + void __iomem *reg = bank->base; + u32 l; + + if (bank->regs->set_irqenable) { + reg += bank->regs->set_irqenable; + l = gpio_mask; + bank->context.irqenable1 |= gpio_mask; + } else { + reg += bank->regs->irqenable; + l = __raw_readl(reg); + if (bank->regs->irqenable_inv) + l &= ~gpio_mask; + else + l |= gpio_mask; + bank->context.irqenable1 = l; + } + + __raw_writel(l, reg); +} + +static void _disable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask) +{ + void __iomem *reg = bank->base; + u32 l; + + if (bank->regs->clr_irqenable) { + reg += bank->regs->clr_irqenable; + l = gpio_mask; + bank->context.irqenable1 &= ~gpio_mask; + } else { + reg += bank->regs->irqenable; + l = __raw_readl(reg); + if (bank->regs->irqenable_inv) + l |= gpio_mask; + else + l &= ~gpio_mask; + bank->context.irqenable1 = l; + } + + __raw_writel(l, reg); +} + +static inline void _set_gpio_irqenable(struct gpio_bank *bank, int gpio, int enable) +{ + if (enable) + _enable_gpio_irqbank(bank, GPIO_BIT(bank, gpio)); + else + _disable_gpio_irqbank(bank, GPIO_BIT(bank, gpio)); +} + +/* + * Note that ENAWAKEUP needs to be enabled in GPIO_SYSCONFIG register. + * 1510 does not seem to have a wake-up register. If JTAG is connected + * to the target, system will wake up always on GPIO events. While + * system is running all registered GPIO interrupts need to have wake-up + * enabled. When system is suspended, only selected GPIO interrupts need + * to have wake-up enabled. + */ +static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable) +{ + u32 gpio_bit = GPIO_BIT(bank, gpio); + unsigned long flags; + + if (bank->non_wakeup_gpios & gpio_bit) { + dev_err(bank->dev, + "Unable to modify wakeup on non-wakeup GPIO%d\n", gpio); + return -EINVAL; + } + + spin_lock_irqsave(&bank->lock, flags); + if (enable) + bank->suspend_wakeup |= gpio_bit; + else + bank->suspend_wakeup &= ~gpio_bit; + + __raw_writel(bank->suspend_wakeup, bank->base + bank->regs->wkup_en); + spin_unlock_irqrestore(&bank->lock, flags); + + return 0; +} + +static void _reset_gpio(struct gpio_bank *bank, int gpio) +{ + _set_gpio_direction(bank, GPIO_INDEX(bank, gpio), 1); + _set_gpio_irqenable(bank, gpio, 0); + _clear_gpio_irqstatus(bank, gpio); + _set_gpio_triggering(bank, GPIO_INDEX(bank, gpio), IRQ_TYPE_NONE); +} + +/* Use disable_irq_wake() and enable_irq_wake() functions from drivers */ +static int gpio_wake_enable(struct irq_data *d, unsigned int enable) +{ + struct gpio_bank *bank = irq_data_get_irq_chip_data(d); + unsigned int gpio = irq_to_gpio(bank, d->irq); + + return _set_gpio_wakeup(bank, gpio, enable); +} + +static int omap_gpio_request(struct gpio_chip *chip, unsigned offset) +{ + struct gpio_bank *bank = container_of(chip, struct gpio_bank, chip); + unsigned long flags; + + /* + * If this is the first gpio_request for the bank, + * enable the bank module. + */ + if (!bank->mod_usage) + pm_runtime_get_sync(bank->dev); + + 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, offset, IRQ_TYPE_NONE); + + if (bank->regs->pinctrl) { + void __iomem *reg = bank->base + bank->regs->pinctrl; + + /* Claim the pin for MPU */ + __raw_writel(__raw_readl(reg) | (1 << offset), reg); + } + + if (bank->regs->ctrl && !bank->mod_usage) { + void __iomem *reg = bank->base + bank->regs->ctrl; + u32 ctrl; + + ctrl = __raw_readl(reg); + /* Module is enabled, clocks are not gated */ + ctrl &= ~GPIO_MOD_CTRL_BIT; + __raw_writel(ctrl, reg); + bank->context.ctrl = ctrl; + } + + bank->mod_usage |= 1 << offset; + + spin_unlock_irqrestore(&bank->lock, flags); + + return 0; +} + +static void omap_gpio_free(struct gpio_chip *chip, unsigned offset) +{ + struct gpio_bank *bank = container_of(chip, struct gpio_bank, chip); + void __iomem *base = bank->base; + unsigned long flags; + + spin_lock_irqsave(&bank->lock, flags); + + if (bank->regs->wkup_en) { + /* Disable wake-up during idle for dynamic tick */ + _gpio_rmw(base, bank->regs->wkup_en, 1 << offset, 0); + bank->context.wake_en = + __raw_readl(bank->base + bank->regs->wkup_en); + } + + bank->mod_usage &= ~(1 << offset); + + if (bank->regs->ctrl && !bank->mod_usage) { + void __iomem *reg = bank->base + bank->regs->ctrl; + u32 ctrl; + + ctrl = __raw_readl(reg); + /* Module is disabled, clocks are gated */ + ctrl |= GPIO_MOD_CTRL_BIT; + __raw_writel(ctrl, reg); + bank->context.ctrl = ctrl; + } + + _reset_gpio(bank, bank->chip.base + offset); + spin_unlock_irqrestore(&bank->lock, flags); + + /* + * If this is the last gpio to be freed in the bank, + * disable the bank module. + */ + if (!bank->mod_usage) + pm_runtime_put(bank->dev); +} + +/* + * We need to unmask the GPIO bank interrupt as soon as possible to + * avoid missing GPIO interrupts for other lines in the bank. + * Then we need to mask-read-clear-unmask the triggered GPIO lines + * in the bank to avoid missing nested interrupts for a GPIO line. + * If we wait to unmask individual GPIO lines in the bank after the + * line's interrupt handler has been run, we may miss some nested + * interrupts. + */ +static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc) +{ + void __iomem *isr_reg = NULL; + u32 isr; + unsigned int gpio_irq, gpio_index; + struct gpio_bank *bank; + u32 retrigger = 0; + int unmasked = 0; + struct irq_chip *chip = irq_desc_get_chip(desc); + + chained_irq_enter(chip, desc); + + bank = irq_get_handler_data(irq); + isr_reg = bank->base + bank->regs->irqstatus; + pm_runtime_get_sync(bank->dev); + + if (WARN_ON(!isr_reg)) + goto exit; + + while(1) { + u32 isr_saved, level_mask = 0; + u32 enabled; + + enabled = _get_gpio_irqbank_mask(bank); + isr_saved = isr = __raw_readl(isr_reg) & enabled; + + if (bank->level_mask) + level_mask = bank->level_mask & enabled; + + /* clear edge sensitive interrupts before handler(s) are + called so that we don't miss any interrupt occurred while + executing them */ + _disable_gpio_irqbank(bank, isr_saved & ~level_mask); + _clear_gpio_irqbank(bank, isr_saved & ~level_mask); + _enable_gpio_irqbank(bank, isr_saved & ~level_mask); + + /* if there is only edge sensitive GPIO pin interrupts + configured, we could unmask GPIO bank interrupt immediately */ + if (!level_mask && !unmasked) { + unmasked = 1; + chained_irq_exit(chip, desc); + } + + isr |= retrigger; + retrigger = 0; + if (!isr) + break; + + gpio_irq = bank->irq_base; + for (; isr != 0; isr >>= 1, gpio_irq++) { + int gpio = irq_to_gpio(bank, gpio_irq); + + if (!(isr & 1)) + continue; + + gpio_index = GPIO_INDEX(bank, gpio); + + /* + * Some chips can't respond to both rising and falling + * at the same time. If this irq was requested with + * both flags, we need to flip the ICR data for the IRQ + * to respond to the IRQ for the opposite direction. + * This will be indicated in the bank toggle_mask. + */ + if (bank->toggle_mask & (1 << gpio_index)) + _toggle_gpio_edge_triggering(bank, gpio_index); + + generic_handle_irq(gpio_irq); + } + } + /* if bank has any level sensitive GPIO pin interrupt + configured, we must unmask the bank interrupt only after + handler(s) are executed in order to avoid spurious bank + interrupt */ +exit: + if (!unmasked) + chained_irq_exit(chip, desc); + pm_runtime_put(bank->dev); +} + +static void gpio_irq_shutdown(struct irq_data *d) +{ + struct gpio_bank *bank = irq_data_get_irq_chip_data(d); + unsigned int gpio = irq_to_gpio(bank, d->irq); + unsigned long flags; + + spin_lock_irqsave(&bank->lock, flags); + _reset_gpio(bank, gpio); + spin_unlock_irqrestore(&bank->lock, flags); +} + +static void gpio_ack_irq(struct irq_data *d) +{ + struct gpio_bank *bank = irq_data_get_irq_chip_data(d); + unsigned int gpio = irq_to_gpio(bank, d->irq); + + _clear_gpio_irqstatus(bank, gpio); +} + +static void gpio_mask_irq(struct irq_data *d) +{ + struct gpio_bank *bank = irq_data_get_irq_chip_data(d); + unsigned int gpio = irq_to_gpio(bank, d->irq); + unsigned long flags; + + spin_lock_irqsave(&bank->lock, flags); + _set_gpio_irqenable(bank, gpio, 0); + _set_gpio_triggering(bank, GPIO_INDEX(bank, gpio), IRQ_TYPE_NONE); + spin_unlock_irqrestore(&bank->lock, flags); +} + +static void gpio_unmask_irq(struct irq_data *d) +{ + struct gpio_bank *bank = irq_data_get_irq_chip_data(d); + unsigned int gpio = irq_to_gpio(bank, d->irq); + unsigned int irq_mask = GPIO_BIT(bank, gpio); + u32 trigger = irqd_get_trigger_type(d); + unsigned long flags; + + spin_lock_irqsave(&bank->lock, flags); + if (trigger) + _set_gpio_triggering(bank, GPIO_INDEX(bank, gpio), trigger); + + /* For level-triggered GPIOs, the clearing must be done after + * the HW source is cleared, thus after the handler has run */ + if (bank->level_mask & irq_mask) { + _set_gpio_irqenable(bank, gpio, 0); + _clear_gpio_irqstatus(bank, gpio); + } + + _set_gpio_irqenable(bank, gpio, 1); + spin_unlock_irqrestore(&bank->lock, flags); +} + +static struct irq_chip gpio_irq_chip = { + .name = "GPIO", + .irq_shutdown = gpio_irq_shutdown, + .irq_ack = gpio_ack_irq, + .irq_mask = gpio_mask_irq, + .irq_unmask = gpio_unmask_irq, + .irq_set_type = gpio_irq_type, + .irq_set_wake = gpio_wake_enable, +}; + +/*---------------------------------------------------------------------*/ + +static int omap_mpuio_suspend_noirq(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct gpio_bank *bank = platform_get_drvdata(pdev); + void __iomem *mask_reg = bank->base + + OMAP_MPUIO_GPIO_MASKIT / bank->stride; + unsigned long flags; + + spin_lock_irqsave(&bank->lock, flags); + bank->saved_wakeup = __raw_readl(mask_reg); + __raw_writel(0xffff & ~bank->suspend_wakeup, mask_reg); + spin_unlock_irqrestore(&bank->lock, flags); + + return 0; +} + +static int omap_mpuio_resume_noirq(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct gpio_bank *bank = platform_get_drvdata(pdev); + void __iomem *mask_reg = bank->base + + OMAP_MPUIO_GPIO_MASKIT / bank->stride; + unsigned long flags; + + spin_lock_irqsave(&bank->lock, flags); + __raw_writel(bank->saved_wakeup, mask_reg); + spin_unlock_irqrestore(&bank->lock, flags); + + return 0; +} + +static const struct dev_pm_ops omap_mpuio_dev_pm_ops = { + .suspend_noirq = omap_mpuio_suspend_noirq, + .resume_noirq = omap_mpuio_resume_noirq, +}; + +/* use platform_driver for this. */ +static struct platform_driver omap_mpuio_driver = { + .driver = { + .name = "mpuio", + .pm = &omap_mpuio_dev_pm_ops, + }, +}; + +static struct platform_device omap_mpuio_device = { + .name = "mpuio", + .id = -1, + .dev = { + .driver = &omap_mpuio_driver.driver, + } + /* could list the /proc/iomem resources */ +}; + +static inline void mpuio_init(struct gpio_bank *bank) +{ + platform_set_drvdata(&omap_mpuio_device, bank); + + if (platform_driver_register(&omap_mpuio_driver) == 0) + (void) platform_device_register(&omap_mpuio_device); +} + +/*---------------------------------------------------------------------*/ + +static int gpio_input(struct gpio_chip *chip, unsigned offset) +{ + struct gpio_bank *bank; + unsigned long flags; + + bank = container_of(chip, struct gpio_bank, chip); + spin_lock_irqsave(&bank->lock, flags); + _set_gpio_direction(bank, offset, 1); + spin_unlock_irqrestore(&bank->lock, flags); + return 0; +} + +static int gpio_is_input(struct gpio_bank *bank, int mask) +{ + void __iomem *reg = bank->base + bank->regs->direction; + + return __raw_readl(reg) & mask; +} + +static int gpio_get(struct gpio_chip *chip, unsigned offset) +{ + struct gpio_bank *bank; + u32 mask; + + bank = container_of(chip, struct gpio_bank, chip); + mask = (1 << offset); + + if (gpio_is_input(bank, mask)) + return _get_gpio_datain(bank, offset); + else + return _get_gpio_dataout(bank, offset); +} + +static int gpio_output(struct gpio_chip *chip, unsigned offset, int value) +{ + struct gpio_bank *bank; + unsigned long flags; + + bank = container_of(chip, struct gpio_bank, chip); + spin_lock_irqsave(&bank->lock, flags); + bank->set_dataout(bank, offset, value); + _set_gpio_direction(bank, offset, 0); + spin_unlock_irqrestore(&bank->lock, flags); + return 0; +} + +static int gpio_debounce(struct gpio_chip *chip, unsigned offset, + unsigned debounce) +{ + struct gpio_bank *bank; + unsigned long flags; + + bank = container_of(chip, struct gpio_bank, chip); + + if (!bank->dbck) { + bank->dbck = clk_get(bank->dev, "dbclk"); + if (IS_ERR(bank->dbck)) + dev_err(bank->dev, "Could not get gpio dbck\n"); + } + + spin_lock_irqsave(&bank->lock, flags); + _set_gpio_debounce(bank, offset, debounce); + spin_unlock_irqrestore(&bank->lock, flags); + + return 0; +} + +static void gpio_set(struct gpio_chip *chip, unsigned offset, int value) +{ + struct gpio_bank *bank; + unsigned long flags; + + bank = container_of(chip, struct gpio_bank, chip); + spin_lock_irqsave(&bank->lock, flags); + bank->set_dataout(bank, offset, value); + spin_unlock_irqrestore(&bank->lock, flags); +} + +static int gpio_2irq(struct gpio_chip *chip, unsigned offset) +{ + struct gpio_bank *bank; + + bank = container_of(chip, struct gpio_bank, chip); + return bank->irq_base + offset; +} + +/*---------------------------------------------------------------------*/ + +static void __init omap_gpio_show_rev(struct gpio_bank *bank) +{ + static bool called; + u32 rev; + + if (called || bank->regs->revision == USHRT_MAX) + return; + + rev = __raw_readw(bank->base + bank->regs->revision); + pr_info("OMAP GPIO hardware version %d.%d\n", + (rev >> 4) & 0x0f, rev & 0x0f); + + called = true; +} + +/* This lock class tells lockdep that GPIO irqs are in a different + * category than their parents, so it won't report false recursion. + */ +static struct lock_class_key gpio_lock_class; + +static void omap_gpio_mod_init(struct gpio_bank *bank) +{ + void __iomem *base = bank->base; + u32 l = 0xffffffff; + + if (bank->width == 16) + l = 0xffff; + + if (bank->is_mpuio) { + __raw_writel(l, bank->base + bank->regs->irqenable); + return; + } + + _gpio_rmw(base, bank->regs->irqenable, l, bank->regs->irqenable_inv); + _gpio_rmw(base, bank->regs->irqstatus, l, !bank->regs->irqenable_inv); + if (bank->regs->debounce_en) + __raw_writel(0, base + bank->regs->debounce_en); + + /* Save OE default value (0xffffffff) in the context */ + bank->context.oe = __raw_readl(bank->base + bank->regs->direction); + /* Initialize interface clk ungated, module enabled */ + if (bank->regs->ctrl) + __raw_writel(0, base + bank->regs->ctrl); +} + +static __devinit void +omap_mpuio_alloc_gc(struct gpio_bank *bank, unsigned int irq_start, + unsigned int num) +{ + struct irq_chip_generic *gc; + struct irq_chip_type *ct; + + gc = irq_alloc_generic_chip("MPUIO", 1, irq_start, bank->base, + handle_simple_irq); + if (!gc) { + dev_err(bank->dev, "Memory alloc failed for gc\n"); + return; + } + + ct = gc->chip_types; + + /* NOTE: No ack required, reading IRQ status clears it. */ + ct->chip.irq_mask = irq_gc_mask_set_bit; + ct->chip.irq_unmask = irq_gc_mask_clr_bit; + ct->chip.irq_set_type = gpio_irq_type; + + if (bank->regs->wkup_en) + ct->chip.irq_set_wake = gpio_wake_enable, + + ct->regs.mask = OMAP_MPUIO_GPIO_INT / bank->stride; + irq_setup_generic_chip(gc, IRQ_MSK(num), IRQ_GC_INIT_MASK_CACHE, + IRQ_NOREQUEST | IRQ_NOPROBE, 0); +} + +static void __devinit omap_gpio_chip_init(struct gpio_bank *bank) +{ + int j; + static int gpio; + + /* + * 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; + bank->chip.set_debounce = gpio_debounce; + bank->chip.set = gpio_set; + bank->chip.to_irq = gpio_2irq; + if (bank->is_mpuio) { + bank->chip.label = "mpuio"; + if (bank->regs->wkup_en) + bank->chip.dev = &omap_mpuio_device.dev; + bank->chip.base = OMAP_MPUIO(0); + } else { + bank->chip.label = "gpio"; + bank->chip.base = gpio; + gpio += bank->width; + } + bank->chip.ngpio = bank->width; + + gpiochip_add(&bank->chip); + + for (j = bank->irq_base; j < bank->irq_base + bank->width; j++) { + irq_set_lockdep_class(j, &gpio_lock_class); + irq_set_chip_data(j, bank); + if (bank->is_mpuio) { + omap_mpuio_alloc_gc(bank, j, bank->width); + } else { + irq_set_chip(j, &gpio_irq_chip); + irq_set_handler(j, handle_simple_irq); + set_irq_flags(j, IRQF_VALID); + } + } + irq_set_chained_handler(bank->irq, gpio_irq_handler); + irq_set_handler_data(bank->irq, bank); +} + +static const struct of_device_id omap_gpio_match[]; + +static int __devinit omap_gpio_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *node = dev->of_node; + const struct of_device_id *match; + struct omap_gpio_platform_data *pdata; + struct resource *res; + struct gpio_bank *bank; + int ret = 0; + + match = of_match_device(of_match_ptr(omap_gpio_match), dev); + + pdata = match ? match->data : dev->platform_data; + if (!pdata) + return -EINVAL; + + bank = devm_kzalloc(&pdev->dev, sizeof(struct gpio_bank), GFP_KERNEL); + if (!bank) { + dev_err(dev, "Memory alloc failed\n"); + return -ENOMEM; + } + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (unlikely(!res)) { + dev_err(dev, "Invalid IRQ resource\n"); + return -ENODEV; + } + + bank->irq = res->start; + bank->dev = dev; + bank->dbck_flag = pdata->dbck_flag; + bank->stride = pdata->bank_stride; + bank->width = pdata->bank_width; + bank->is_mpuio = pdata->is_mpuio; + bank->non_wakeup_gpios = pdata->non_wakeup_gpios; + bank->loses_context = pdata->loses_context; + bank->get_context_loss_count = pdata->get_context_loss_count; + bank->regs = pdata->regs; +#ifdef CONFIG_OF_GPIO + bank->chip.of_node = of_node_get(node); +#endif + + bank->irq_base = irq_alloc_descs(-1, 0, bank->width, 0); + if (bank->irq_base < 0) { + dev_err(dev, "Couldn't allocate IRQ numbers\n"); + return -ENODEV; + } + + bank->domain = irq_domain_add_legacy(node, bank->width, bank->irq_base, + 0, &irq_domain_simple_ops, NULL); + + if (bank->regs->set_dataout && bank->regs->clr_dataout) + bank->set_dataout = _set_gpio_dataout_reg; + else + bank->set_dataout = _set_gpio_dataout_mask; + + spin_lock_init(&bank->lock); + + /* Static mapping, never released */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (unlikely(!res)) { + dev_err(dev, "Invalid mem resource\n"); + return -ENODEV; + } + + if (!devm_request_mem_region(dev, res->start, resource_size(res), + pdev->name)) { + dev_err(dev, "Region already claimed\n"); + return -EBUSY; + } + + bank->base = devm_ioremap(dev, res->start, resource_size(res)); + if (!bank->base) { + dev_err(dev, "Could not ioremap\n"); + return -ENOMEM; + } + + platform_set_drvdata(pdev, bank); + + pm_runtime_enable(bank->dev); + pm_runtime_irq_safe(bank->dev); + pm_runtime_get_sync(bank->dev); + + if (bank->is_mpuio) + mpuio_init(bank); + + omap_gpio_mod_init(bank); + omap_gpio_chip_init(bank); + omap_gpio_show_rev(bank); + + pm_runtime_put(bank->dev); + + list_add_tail(&bank->node, &omap_gpio_list); + + return ret; +} + +#ifdef CONFIG_ARCH_OMAP2PLUS + +#if defined(CONFIG_PM_SLEEP) +static int omap_gpio_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct gpio_bank *bank = platform_get_drvdata(pdev); + void __iomem *base = bank->base; + void __iomem *wakeup_enable; + unsigned long flags; + + if (!bank->mod_usage || !bank->loses_context) + return 0; + + if (!bank->regs->wkup_en || !bank->suspend_wakeup) + return 0; + + wakeup_enable = bank->base + bank->regs->wkup_en; + + spin_lock_irqsave(&bank->lock, flags); + bank->saved_wakeup = __raw_readl(wakeup_enable); + _gpio_rmw(base, bank->regs->wkup_en, 0xffffffff, 0); + _gpio_rmw(base, bank->regs->wkup_en, bank->suspend_wakeup, 1); + spin_unlock_irqrestore(&bank->lock, flags); + + return 0; +} + +static int omap_gpio_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct gpio_bank *bank = platform_get_drvdata(pdev); + void __iomem *base = bank->base; + unsigned long flags; + + if (!bank->mod_usage || !bank->loses_context) + return 0; + + if (!bank->regs->wkup_en || !bank->saved_wakeup) + return 0; + + spin_lock_irqsave(&bank->lock, flags); + _gpio_rmw(base, bank->regs->wkup_en, 0xffffffff, 0); + _gpio_rmw(base, bank->regs->wkup_en, bank->saved_wakeup, 1); + spin_unlock_irqrestore(&bank->lock, flags); + + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +#if defined(CONFIG_PM_RUNTIME) +static void omap_gpio_restore_context(struct gpio_bank *bank); + +static int omap_gpio_runtime_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct gpio_bank *bank = platform_get_drvdata(pdev); + u32 l1 = 0, l2 = 0; + unsigned long flags; + u32 wake_low, wake_hi; + + spin_lock_irqsave(&bank->lock, flags); + + /* + * Only edges can generate a wakeup event to the PRCM. + * + * Therefore, ensure any wake-up capable GPIOs have + * edge-detection enabled before going idle to ensure a wakeup + * to the PRCM is generated on a GPIO transition. (c.f. 34xx + * NDA TRM 25.5.3.1) + * + * The normal values will be restored upon ->runtime_resume() + * by writing back the values saved in bank->context. + */ + wake_low = bank->context.leveldetect0 & bank->context.wake_en; + if (wake_low) + __raw_writel(wake_low | bank->context.fallingdetect, + bank->base + bank->regs->fallingdetect); + wake_hi = bank->context.leveldetect1 & bank->context.wake_en; + if (wake_hi) + __raw_writel(wake_hi | bank->context.risingdetect, + bank->base + bank->regs->risingdetect); + + if (bank->power_mode != OFF_MODE) { + bank->power_mode = 0; + goto update_gpio_context_count; + } + /* + * If going to OFF, remove triggering for all + * non-wakeup GPIOs. Otherwise spurious IRQs will be + * generated. See OMAP2420 Errata item 1.101. + */ + bank->saved_datain = __raw_readl(bank->base + + bank->regs->datain); + l1 = __raw_readl(bank->base + bank->regs->fallingdetect); + l2 = __raw_readl(bank->base + bank->regs->risingdetect); + + bank->saved_fallingdetect = l1; + bank->saved_risingdetect = l2; + l1 &= ~bank->enabled_non_wakeup_gpios; + l2 &= ~bank->enabled_non_wakeup_gpios; + + __raw_writel(l1, bank->base + bank->regs->fallingdetect); + __raw_writel(l2, bank->base + bank->regs->risingdetect); + + bank->workaround_enabled = true; + +update_gpio_context_count: + if (bank->get_context_loss_count) + bank->context_loss_count = + bank->get_context_loss_count(bank->dev); + + _gpio_dbck_disable(bank); + spin_unlock_irqrestore(&bank->lock, flags); + + return 0; +} + +static int omap_gpio_runtime_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct gpio_bank *bank = platform_get_drvdata(pdev); + int context_lost_cnt_after; + u32 l = 0, gen, gen0, gen1; + unsigned long flags; + + spin_lock_irqsave(&bank->lock, flags); + _gpio_dbck_enable(bank); + + /* + * In ->runtime_suspend(), level-triggered, wakeup-enabled + * GPIOs were set to edge trigger also in order to be able to + * generate a PRCM wakeup. Here we restore the + * pre-runtime_suspend() values for edge triggering. + */ + __raw_writel(bank->context.fallingdetect, + bank->base + bank->regs->fallingdetect); + __raw_writel(bank->context.risingdetect, + bank->base + bank->regs->risingdetect); + + if (!bank->workaround_enabled) { + spin_unlock_irqrestore(&bank->lock, flags); + return 0; + } + + if (bank->get_context_loss_count) { + context_lost_cnt_after = + bank->get_context_loss_count(bank->dev); + if (context_lost_cnt_after != bank->context_loss_count || + !context_lost_cnt_after) { + omap_gpio_restore_context(bank); + } else { + spin_unlock_irqrestore(&bank->lock, flags); + return 0; + } + } + + __raw_writel(bank->saved_fallingdetect, + bank->base + bank->regs->fallingdetect); + __raw_writel(bank->saved_risingdetect, + bank->base + bank->regs->risingdetect); + l = __raw_readl(bank->base + bank->regs->datain); + + /* + * Check if any of the non-wakeup interrupt GPIOs have changed + * state. If so, generate an IRQ by software. This is + * horribly racy, but it's the best we can do to work around + * this silicon bug. + */ + l ^= bank->saved_datain; + l &= bank->enabled_non_wakeup_gpios; + + /* + * No need to generate IRQs for the rising edge for gpio IRQs + * configured with falling edge only; and vice versa. + */ + gen0 = l & bank->saved_fallingdetect; + gen0 &= bank->saved_datain; + + gen1 = l & bank->saved_risingdetect; + gen1 &= ~(bank->saved_datain); + + /* FIXME: Consider GPIO IRQs with level detections properly! */ + gen = l & (~(bank->saved_fallingdetect) & ~(bank->saved_risingdetect)); + /* Consider all GPIO IRQs needed to be updated */ + gen |= gen0 | gen1; + + if (gen) { + u32 old0, old1; + + old0 = __raw_readl(bank->base + bank->regs->leveldetect0); + old1 = __raw_readl(bank->base + bank->regs->leveldetect1); + + if (cpu_is_omap24xx() || cpu_is_omap34xx()) { + __raw_writel(old0 | gen, bank->base + + bank->regs->leveldetect0); + __raw_writel(old1 | gen, bank->base + + bank->regs->leveldetect1); + } + + if (cpu_is_omap44xx()) { + __raw_writel(old0 | l, bank->base + + bank->regs->leveldetect0); + __raw_writel(old1 | l, bank->base + + bank->regs->leveldetect1); + } + __raw_writel(old0, bank->base + bank->regs->leveldetect0); + __raw_writel(old1, bank->base + bank->regs->leveldetect1); + } + + bank->workaround_enabled = false; + spin_unlock_irqrestore(&bank->lock, flags); + + return 0; +} +#endif /* CONFIG_PM_RUNTIME */ + +void omap2_gpio_prepare_for_idle(int pwr_mode) +{ + struct gpio_bank *bank; + + list_for_each_entry(bank, &omap_gpio_list, node) { + if (!bank->mod_usage || !bank->loses_context) + continue; + + bank->power_mode = pwr_mode; + + pm_runtime_put_sync_suspend(bank->dev); + } +} + +void omap2_gpio_resume_after_idle(void) +{ + struct gpio_bank *bank; + + list_for_each_entry(bank, &omap_gpio_list, node) { + if (!bank->mod_usage || !bank->loses_context) + continue; + + pm_runtime_get_sync(bank->dev); + } +} + +#if defined(CONFIG_PM_RUNTIME) +static void omap_gpio_restore_context(struct gpio_bank *bank) +{ + __raw_writel(bank->context.wake_en, + bank->base + bank->regs->wkup_en); + __raw_writel(bank->context.ctrl, bank->base + bank->regs->ctrl); + __raw_writel(bank->context.leveldetect0, + bank->base + bank->regs->leveldetect0); + __raw_writel(bank->context.leveldetect1, + bank->base + bank->regs->leveldetect1); + __raw_writel(bank->context.risingdetect, + bank->base + bank->regs->risingdetect); + __raw_writel(bank->context.fallingdetect, + bank->base + bank->regs->fallingdetect); + if (bank->regs->set_dataout && bank->regs->clr_dataout) + __raw_writel(bank->context.dataout, + bank->base + bank->regs->set_dataout); + else + __raw_writel(bank->context.dataout, + bank->base + bank->regs->dataout); + __raw_writel(bank->context.oe, bank->base + bank->regs->direction); + + if (bank->dbck_enable_mask) { + __raw_writel(bank->context.debounce, bank->base + + bank->regs->debounce); + __raw_writel(bank->context.debounce_en, + bank->base + bank->regs->debounce_en); + } + + __raw_writel(bank->context.irqenable1, + bank->base + bank->regs->irqenable); + __raw_writel(bank->context.irqenable2, + bank->base + bank->regs->irqenable2); +} +#endif /* CONFIG_PM_RUNTIME */ +#else +#define omap_gpio_suspend NULL +#define omap_gpio_resume NULL +#define omap_gpio_runtime_suspend NULL +#define omap_gpio_runtime_resume NULL +#endif + +static const struct dev_pm_ops gpio_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(omap_gpio_suspend, omap_gpio_resume) + SET_RUNTIME_PM_OPS(omap_gpio_runtime_suspend, omap_gpio_runtime_resume, + NULL) +}; + +#if defined(CONFIG_OF) +static struct omap_gpio_reg_offs omap2_gpio_regs = { + .revision = OMAP24XX_GPIO_REVISION, + .direction = OMAP24XX_GPIO_OE, + .datain = OMAP24XX_GPIO_DATAIN, + .dataout = OMAP24XX_GPIO_DATAOUT, + .set_dataout = OMAP24XX_GPIO_SETDATAOUT, + .clr_dataout = OMAP24XX_GPIO_CLEARDATAOUT, + .irqstatus = OMAP24XX_GPIO_IRQSTATUS1, + .irqstatus2 = OMAP24XX_GPIO_IRQSTATUS2, + .irqenable = OMAP24XX_GPIO_IRQENABLE1, + .irqenable2 = OMAP24XX_GPIO_IRQENABLE2, + .set_irqenable = OMAP24XX_GPIO_SETIRQENABLE1, + .clr_irqenable = OMAP24XX_GPIO_CLEARIRQENABLE1, + .debounce = OMAP24XX_GPIO_DEBOUNCE_VAL, + .debounce_en = OMAP24XX_GPIO_DEBOUNCE_EN, + .ctrl = OMAP24XX_GPIO_CTRL, + .wkup_en = OMAP24XX_GPIO_WAKE_EN, + .leveldetect0 = OMAP24XX_GPIO_LEVELDETECT0, + .leveldetect1 = OMAP24XX_GPIO_LEVELDETECT1, + .risingdetect = OMAP24XX_GPIO_RISINGDETECT, + .fallingdetect = OMAP24XX_GPIO_FALLINGDETECT, +}; + +static struct omap_gpio_reg_offs omap4_gpio_regs = { + .revision = OMAP4_GPIO_REVISION, + .direction = OMAP4_GPIO_OE, + .datain = OMAP4_GPIO_DATAIN, + .dataout = OMAP4_GPIO_DATAOUT, + .set_dataout = OMAP4_GPIO_SETDATAOUT, + .clr_dataout = OMAP4_GPIO_CLEARDATAOUT, + .irqstatus = OMAP4_GPIO_IRQSTATUS0, + .irqstatus2 = OMAP4_GPIO_IRQSTATUS1, + .irqenable = OMAP4_GPIO_IRQSTATUSSET0, + .irqenable2 = OMAP4_GPIO_IRQSTATUSSET1, + .set_irqenable = OMAP4_GPIO_IRQSTATUSSET0, + .clr_irqenable = OMAP4_GPIO_IRQSTATUSCLR0, + .debounce = OMAP4_GPIO_DEBOUNCINGTIME, + .debounce_en = OMAP4_GPIO_DEBOUNCENABLE, + .ctrl = OMAP4_GPIO_CTRL, + .wkup_en = OMAP4_GPIO_IRQWAKEN0, + .leveldetect0 = OMAP4_GPIO_LEVELDETECT0, + .leveldetect1 = OMAP4_GPIO_LEVELDETECT1, + .risingdetect = OMAP4_GPIO_RISINGDETECT, + .fallingdetect = OMAP4_GPIO_FALLINGDETECT, +}; + +static struct omap_gpio_platform_data omap2_pdata = { + .regs = &omap2_gpio_regs, + .bank_width = 32, + .dbck_flag = false, +}; + +static struct omap_gpio_platform_data omap3_pdata = { + .regs = &omap2_gpio_regs, + .bank_width = 32, + .dbck_flag = true, +}; + +static struct omap_gpio_platform_data omap4_pdata = { + .regs = &omap4_gpio_regs, + .bank_width = 32, + .dbck_flag = true, +}; + +static const struct of_device_id omap_gpio_match[] = { + { + .compatible = "ti,omap4-gpio", + .data = &omap4_pdata, + }, + { + .compatible = "ti,omap3-gpio", + .data = &omap3_pdata, + }, + { + .compatible = "ti,omap2-gpio", + .data = &omap2_pdata, + }, + { }, +}; +MODULE_DEVICE_TABLE(of, omap_gpio_match); +#endif + +static struct platform_driver omap_gpio_driver = { + .probe = omap_gpio_probe, + .driver = { + .name = "omap_gpio", + .pm = &gpio_pm_ops, + .of_match_table = of_match_ptr(omap_gpio_match), + }, +}; + +/* + * gpio driver register needs to be done before + * machine_init functions access gpio APIs. + * Hence omap_gpio_drv_reg() is a postcore_initcall. + */ +static int __init omap_gpio_drv_reg(void) +{ + return platform_driver_register(&omap_gpio_driver); +} +postcore_initcall(omap_gpio_drv_reg); |