diff options
Diffstat (limited to 'drivers/gpio/gpio-lynxpoint.c')
| -rw-r--r-- | drivers/gpio/gpio-lynxpoint.c | 116 |
1 files changed, 44 insertions, 72 deletions
diff --git a/drivers/gpio/gpio-lynxpoint.c b/drivers/gpio/gpio-lynxpoint.c index 2bea89b72508..fa945ec9ccff 100644 --- a/drivers/gpio/gpio-lynxpoint.c +++ b/drivers/gpio/gpio-lynxpoint.c @@ -25,9 +25,7 @@ #include <linux/types.h> #include <linux/bitops.h> #include <linux/interrupt.h> -#include <linux/irq.h> #include <linux/gpio.h> -#include <linux/irqdomain.h> #include <linux/slab.h> #include <linux/acpi.h> #include <linux/platform_device.h> @@ -62,7 +60,6 @@ struct lp_gpio { struct gpio_chip chip; - struct irq_domain *domain; struct platform_device *pdev; spinlock_t lock; unsigned long reg_base; @@ -151,7 +148,8 @@ static void lp_gpio_free(struct gpio_chip *chip, unsigned offset) static int lp_irq_type(struct irq_data *d, unsigned type) { - struct lp_gpio *lg = irq_data_get_irq_chip_data(d); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct lp_gpio *lg = container_of(gc, struct lp_gpio, chip); u32 hwirq = irqd_to_hwirq(d); unsigned long flags; u32 value; @@ -236,16 +234,11 @@ static int lp_gpio_direction_output(struct gpio_chip *chip, return 0; } -static int lp_gpio_to_irq(struct gpio_chip *chip, unsigned offset) -{ - struct lp_gpio *lg = container_of(chip, struct lp_gpio, chip); - return irq_create_mapping(lg->domain, offset); -} - static void lp_gpio_irq_handler(unsigned hwirq, struct irq_desc *desc) { struct irq_data *data = irq_desc_get_irq_data(desc); - struct lp_gpio *lg = irq_data_get_irq_handler_data(data); + struct gpio_chip *gc = irq_desc_get_handler_data(desc); + struct lp_gpio *lg = container_of(gc, struct lp_gpio, chip); struct irq_chip *chip = irq_data_get_irq_chip(data); u32 base, pin, mask; unsigned long reg, ena, pending; @@ -262,7 +255,7 @@ static void lp_gpio_irq_handler(unsigned hwirq, struct irq_desc *desc) mask = BIT(pin); /* Clear before handling so we don't lose an edge */ outl(mask, reg); - irq = irq_find_mapping(lg->domain, base + pin); + irq = irq_find_mapping(lg->chip.irqdomain, base + pin); generic_handle_irq(irq); } } @@ -279,7 +272,8 @@ static void lp_irq_mask(struct irq_data *d) static void lp_irq_enable(struct irq_data *d) { - struct lp_gpio *lg = irq_data_get_irq_chip_data(d); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct lp_gpio *lg = container_of(gc, struct lp_gpio, chip); u32 hwirq = irqd_to_hwirq(d); unsigned long reg = lp_gpio_reg(&lg->chip, hwirq, LP_INT_ENABLE); unsigned long flags; @@ -291,7 +285,8 @@ static void lp_irq_enable(struct irq_data *d) static void lp_irq_disable(struct irq_data *d) { - struct lp_gpio *lg = irq_data_get_irq_chip_data(d); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct lp_gpio *lg = container_of(gc, struct lp_gpio, chip); u32 hwirq = irqd_to_hwirq(d); unsigned long reg = lp_gpio_reg(&lg->chip, hwirq, LP_INT_ENABLE); unsigned long flags; @@ -301,26 +296,6 @@ static void lp_irq_disable(struct irq_data *d) spin_unlock_irqrestore(&lg->lock, flags); } -static int lp_irq_reqres(struct irq_data *d) -{ - struct lp_gpio *lg = irq_data_get_irq_chip_data(d); - - if (gpio_lock_as_irq(&lg->chip, irqd_to_hwirq(d))) { - dev_err(lg->chip.dev, - "unable to lock HW IRQ %lu for IRQ\n", - irqd_to_hwirq(d)); - return -EINVAL; - } - return 0; -} - -static void lp_irq_relres(struct irq_data *d) -{ - struct lp_gpio *lg = irq_data_get_irq_chip_data(d); - - gpio_unlock_as_irq(&lg->chip, irqd_to_hwirq(d)); -} - static struct irq_chip lp_irqchip = { .name = "LP-GPIO", .irq_mask = lp_irq_mask, @@ -328,8 +303,6 @@ static struct irq_chip lp_irqchip = { .irq_enable = lp_irq_enable, .irq_disable = lp_irq_disable, .irq_set_type = lp_irq_type, - .irq_request_resources = lp_irq_reqres, - .irq_release_resources = lp_irq_relres, .flags = IRQCHIP_SKIP_SET_WAKE, }; @@ -348,22 +321,6 @@ static void lp_gpio_irq_init_hw(struct lp_gpio *lg) } } -static int lp_gpio_irq_map(struct irq_domain *d, unsigned int irq, - irq_hw_number_t hwirq) -{ - struct lp_gpio *lg = d->host_data; - - irq_set_chip_and_handler(irq, &lp_irqchip, handle_simple_irq); - irq_set_chip_data(irq, lg); - irq_set_irq_type(irq, IRQ_TYPE_NONE); - - return 0; -} - -static const struct irq_domain_ops lp_gpio_irq_ops = { - .map = lp_gpio_irq_map, -}; - static int lp_gpio_probe(struct platform_device *pdev) { struct lp_gpio *lg; @@ -371,7 +328,6 @@ static int lp_gpio_probe(struct platform_device *pdev) struct resource *io_rc, *irq_rc; struct device *dev = &pdev->dev; unsigned long reg_len; - unsigned hwirq; int ret = -ENODEV; lg = devm_kzalloc(dev, sizeof(struct lp_gpio), GFP_KERNEL); @@ -414,27 +370,28 @@ static int lp_gpio_probe(struct platform_device *pdev) gc->can_sleep = false; gc->dev = dev; + ret = gpiochip_add(gc); + if (ret) { + dev_err(dev, "failed adding lp-gpio chip\n"); + return ret; + } + /* set up interrupts */ if (irq_rc && irq_rc->start) { - hwirq = irq_rc->start; - gc->to_irq = lp_gpio_to_irq; - - lg->domain = irq_domain_add_linear(NULL, LP_NUM_GPIO, - &lp_gpio_irq_ops, lg); - if (!lg->domain) - return -ENXIO; - lp_gpio_irq_init_hw(lg); + ret = gpiochip_irqchip_add(gc, &lp_irqchip, 0, + handle_simple_irq, IRQ_TYPE_NONE); + if (ret) { + dev_err(dev, "failed to add irqchip\n"); + gpiochip_remove(gc); + return ret; + } - irq_set_handler_data(hwirq, lg); - irq_set_chained_handler(hwirq, lp_gpio_irq_handler); + gpiochip_set_chained_irqchip(gc, &lp_irqchip, + (unsigned)irq_rc->start, + lp_gpio_irq_handler); } - ret = gpiochip_add(gc); - if (ret) { - dev_err(dev, "failed adding lp-gpio chip\n"); - return ret; - } pm_runtime_enable(dev); return 0; @@ -450,9 +407,27 @@ static int lp_gpio_runtime_resume(struct device *dev) return 0; } +static int lp_gpio_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct lp_gpio *lg = platform_get_drvdata(pdev); + unsigned long reg; + int i; + + /* on some hardware suspend clears input sensing, re-enable it here */ + for (i = 0; i < lg->chip.ngpio; i++) { + if (gpiochip_is_requested(&lg->chip, i) != NULL) { + reg = lp_gpio_reg(&lg->chip, i, LP_CONFIG2); + outl(inl(reg) & ~GPINDIS_BIT, reg); + } + } + return 0; +} + static const struct dev_pm_ops lp_gpio_pm_ops = { .runtime_suspend = lp_gpio_runtime_suspend, .runtime_resume = lp_gpio_runtime_resume, + .resume = lp_gpio_resume, }; static const struct acpi_device_id lynxpoint_gpio_acpi_match[] = { @@ -465,11 +440,8 @@ MODULE_DEVICE_TABLE(acpi, lynxpoint_gpio_acpi_match); static int lp_gpio_remove(struct platform_device *pdev) { struct lp_gpio *lg = platform_get_drvdata(pdev); - int err; pm_runtime_disable(&pdev->dev); - err = gpiochip_remove(&lg->chip); - if (err) - dev_warn(&pdev->dev, "failed to remove gpio_chip.\n"); + gpiochip_remove(&lg->chip); return 0; } |