diff options
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-tc3589x.c | 98 |
1 files changed, 70 insertions, 28 deletions
diff --git a/drivers/gpio/gpio-tc3589x.c b/drivers/gpio/gpio-tc3589x.c index 2a82e8999a4..6e890093397 100644 --- a/drivers/gpio/gpio-tc3589x.c +++ b/drivers/gpio/gpio-tc3589x.c @@ -12,6 +12,7 @@ #include <linux/slab.h> #include <linux/gpio.h> #include <linux/irq.h> +#include <linux/irqdomain.h> #include <linux/interrupt.h> #include <linux/mfd/tc3589x.h> @@ -29,6 +30,7 @@ struct tc3589x_gpio { struct tc3589x *tc3589x; struct device *dev; struct mutex irq_lock; + struct irq_domain *domain; int irq_base; @@ -92,11 +94,28 @@ static int tc3589x_gpio_direction_input(struct gpio_chip *chip, return tc3589x_set_bits(tc3589x, reg, 1 << pos, 0); } +/** + * tc3589x_gpio_irq_get_virq(): Map an interrupt on a chip to a virtual IRQ + * + * @tc3589x_gpio: tc3589x_gpio_irq controller to operate on. + * @irq: index of the interrupt requested in the chip IRQs + * + * Useful for drivers to request their own IRQs. + */ +static int tc3589x_gpio_irq_get_virq(struct tc3589x_gpio *tc3589x_gpio, + int irq) +{ + if (!tc3589x_gpio) + return -EINVAL; + + return irq_create_mapping(tc3589x_gpio->domain, irq); +} + static int tc3589x_gpio_to_irq(struct gpio_chip *chip, unsigned offset) { struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip); - return tc3589x_gpio->irq_base + offset; + return tc3589x_gpio_irq_get_virq(tc3589x_gpio, offset); } static struct gpio_chip template_chip = { @@ -113,7 +132,7 @@ static struct gpio_chip template_chip = { static int tc3589x_gpio_irq_set_type(struct irq_data *d, unsigned int type) { struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d); - int offset = d->irq - tc3589x_gpio->irq_base; + int offset = d->hwirq; int regoffset = offset / 8; int mask = 1 << (offset % 8); @@ -175,7 +194,7 @@ static void tc3589x_gpio_irq_sync_unlock(struct irq_data *d) static void tc3589x_gpio_irq_mask(struct irq_data *d) { struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d); - int offset = d->irq - tc3589x_gpio->irq_base; + int offset = d->hwirq; int regoffset = offset / 8; int mask = 1 << (offset % 8); @@ -185,7 +204,7 @@ static void tc3589x_gpio_irq_mask(struct irq_data *d) static void tc3589x_gpio_irq_unmask(struct irq_data *d) { struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d); - int offset = d->irq - tc3589x_gpio->irq_base; + int offset = d->hwirq; int regoffset = offset / 8; int mask = 1 << (offset % 8); @@ -222,8 +241,9 @@ static irqreturn_t tc3589x_gpio_irq(int irq, void *dev) while (stat) { int bit = __ffs(stat); int line = i * 8 + bit; + int virq = tc3589x_gpio_irq_get_virq(tc3589x_gpio, line); - handle_nested_irq(tc3589x_gpio->irq_base + line); + handle_nested_irq(virq); stat &= ~(1 << bit); } @@ -233,38 +253,60 @@ static irqreturn_t tc3589x_gpio_irq(int irq, void *dev) return IRQ_HANDLED; } -static int tc3589x_gpio_irq_init(struct tc3589x_gpio *tc3589x_gpio) +static int tc3589x_gpio_irq_map(struct irq_domain *d, unsigned int virq, + irq_hw_number_t hwirq) { - int base = tc3589x_gpio->irq_base; - int irq; + struct tc3589x *tc3589x_gpio = d->host_data; - for (irq = base; irq < base + tc3589x_gpio->chip.ngpio; irq++) { - irq_set_chip_data(irq, tc3589x_gpio); - irq_set_chip_and_handler(irq, &tc3589x_gpio_irq_chip, - handle_simple_irq); - irq_set_nested_thread(irq, 1); + irq_set_chip_data(virq, tc3589x_gpio); + irq_set_chip_and_handler(virq, &tc3589x_gpio_irq_chip, + handle_simple_irq); + irq_set_nested_thread(virq, 1); #ifdef CONFIG_ARM - set_irq_flags(irq, IRQF_VALID); + set_irq_flags(virq, IRQF_VALID); #else - irq_set_noprobe(irq); + irq_set_noprobe(virq); #endif - } return 0; } -static void tc3589x_gpio_irq_remove(struct tc3589x_gpio *tc3589x_gpio) +static void tc3589x_gpio_irq_unmap(struct irq_domain *d, unsigned int virq) { - int base = tc3589x_gpio->irq_base; - int irq; - - for (irq = base; irq < base + tc3589x_gpio->chip.ngpio; irq++) { #ifdef CONFIG_ARM - set_irq_flags(irq, 0); + set_irq_flags(virq, 0); #endif - irq_set_chip_and_handler(irq, NULL, NULL); - irq_set_chip_data(irq, NULL); + irq_set_chip_and_handler(virq, NULL, NULL); + irq_set_chip_data(virq, NULL); +} + +static struct irq_domain_ops tc3589x_irq_ops = { + .map = tc3589x_gpio_irq_map, + .unmap = tc3589x_gpio_irq_unmap, + .xlate = irq_domain_xlate_twocell, +}; + +static int tc3589x_gpio_irq_init(struct tc3589x_gpio *tc3589x_gpio) +{ + int base = tc3589x_gpio->irq_base; + + if (base) { + tc3589x_gpio->domain = irq_domain_add_legacy( + NULL, tc3589x_gpio->chip.ngpio, base, + 0, &tc3589x_irq_ops, tc3589x_gpio); } + else { + tc3589x_gpio->domain = irq_domain_add_linear( + NULL, tc3589x_gpio->chip.ngpio, + &tc3589x_irq_ops, tc3589x_gpio); + } + + if (!tc3589x_gpio->domain) { + dev_err(tc3589x_gpio->dev, "Failed to create irqdomain\n"); + return -ENOSYS; + } + + return 0; } static int __devinit tc3589x_gpio_probe(struct platform_device *pdev) @@ -299,6 +341,9 @@ static int __devinit tc3589x_gpio_probe(struct platform_device *pdev) tc3589x_gpio->irq_base = tc3589x->irq_base + TC3589x_INT_GPIO(0); + tc3589x_gpio->irq_base = tc3589x->irq_base ? + tc3589x->irq_base + TC3589x_INT_GPIO(0) : 0; + /* Bring the GPIO module out of reset */ ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL, TC3589x_RSTCTRL_GPIRST, 0); @@ -313,7 +358,7 @@ static int __devinit tc3589x_gpio_probe(struct platform_device *pdev) "tc3589x-gpio", tc3589x_gpio); if (ret) { dev_err(&pdev->dev, "unable to get irq: %d\n", ret); - goto out_removeirq; + goto out_free; } ret = gpiochip_add(&tc3589x_gpio->chip); @@ -331,8 +376,6 @@ static int __devinit tc3589x_gpio_probe(struct platform_device *pdev) out_freeirq: free_irq(irq, tc3589x_gpio); -out_removeirq: - tc3589x_gpio_irq_remove(tc3589x_gpio); out_free: kfree(tc3589x_gpio); return ret; @@ -357,7 +400,6 @@ static int __devexit tc3589x_gpio_remove(struct platform_device *pdev) } free_irq(irq, tc3589x_gpio); - tc3589x_gpio_irq_remove(tc3589x_gpio); platform_set_drvdata(pdev, NULL); kfree(tc3589x_gpio); |