diff options
Diffstat (limited to 'drivers/mfd/wm831x-irq.c')
| -rw-r--r-- | drivers/mfd/wm831x-irq.c | 148 |
1 files changed, 95 insertions, 53 deletions
diff --git a/drivers/mfd/wm831x-irq.c b/drivers/mfd/wm831x-irq.c index bec4d0539160..804e56ec99eb 100644 --- a/drivers/mfd/wm831x-irq.c +++ b/drivers/mfd/wm831x-irq.c @@ -18,6 +18,7 @@ #include <linux/irq.h> #include <linux/mfd/core.h> #include <linux/interrupt.h> +#include <linux/irqdomain.h> #include <linux/mfd/wm831x/core.h> #include <linux/mfd/wm831x/pdata.h> @@ -328,7 +329,7 @@ static inline int irq_data_to_status_reg(struct wm831x_irq_data *irq_data) static inline struct wm831x_irq_data *irq_to_wm831x_irq(struct wm831x *wm831x, int irq) { - return &wm831x_irqs[irq - wm831x->irq_base]; + return &wm831x_irqs[irq]; } static void wm831x_irq_lock(struct irq_data *data) @@ -374,7 +375,7 @@ static void wm831x_irq_enable(struct irq_data *data) { struct wm831x *wm831x = irq_data_get_irq_chip_data(data); struct wm831x_irq_data *irq_data = irq_to_wm831x_irq(wm831x, - data->irq); + data->hwirq); wm831x->irq_masks_cur[irq_data->reg - 1] &= ~irq_data->mask; } @@ -383,7 +384,7 @@ static void wm831x_irq_disable(struct irq_data *data) { struct wm831x *wm831x = irq_data_get_irq_chip_data(data); struct wm831x_irq_data *irq_data = irq_to_wm831x_irq(wm831x, - data->irq); + data->hwirq); wm831x->irq_masks_cur[irq_data->reg - 1] |= irq_data->mask; } @@ -393,7 +394,7 @@ static int wm831x_irq_set_type(struct irq_data *data, unsigned int type) struct wm831x *wm831x = irq_data_get_irq_chip_data(data); int irq; - irq = data->irq - wm831x->irq_base; + irq = data->hwirq; if (irq < WM831X_IRQ_GPIO_1 || irq > WM831X_IRQ_GPIO_11) { /* Ignore internal-only IRQs */ @@ -412,22 +413,25 @@ static int wm831x_irq_set_type(struct irq_data *data, unsigned int type) * do the update here as we can be called with the bus lock * held. */ + wm831x->gpio_level_low[irq] = false; + wm831x->gpio_level_high[irq] = false; switch (type) { case IRQ_TYPE_EDGE_BOTH: wm831x->gpio_update[irq] = 0x10000 | WM831X_GPN_INT_MODE; - wm831x->gpio_level[irq] = false; break; case IRQ_TYPE_EDGE_RISING: wm831x->gpio_update[irq] = 0x10000 | WM831X_GPN_POL; - wm831x->gpio_level[irq] = false; break; case IRQ_TYPE_EDGE_FALLING: wm831x->gpio_update[irq] = 0x10000; - wm831x->gpio_level[irq] = false; break; case IRQ_TYPE_LEVEL_HIGH: wm831x->gpio_update[irq] = 0x10000 | WM831X_GPN_POL; - wm831x->gpio_level[irq] = true; + wm831x->gpio_level_high[irq] = true; + break; + case IRQ_TYPE_LEVEL_LOW: + wm831x->gpio_update[irq] = 0x10000; + wm831x->gpio_level_low[irq] = true; break; default: return -EINVAL; @@ -469,9 +473,11 @@ static irqreturn_t wm831x_irq_thread(int irq, void *data) * descriptors. */ if (primary & WM831X_TCHPD_INT) - handle_nested_irq(wm831x->irq_base + WM831X_IRQ_TCHPD); + handle_nested_irq(irq_find_mapping(wm831x->irq_domain, + WM831X_IRQ_TCHPD)); if (primary & WM831X_TCHDATA_INT) - handle_nested_irq(wm831x->irq_base + WM831X_IRQ_TCHDATA); + handle_nested_irq(irq_find_mapping(wm831x->irq_domain, + WM831X_IRQ_TCHDATA)); primary &= ~(WM831X_TCHDATA_EINT | WM831X_TCHPD_EINT); for (i = 0; i < ARRAY_SIZE(wm831x_irqs); i++) { @@ -507,16 +513,29 @@ static irqreturn_t wm831x_irq_thread(int irq, void *data) } if (*status & wm831x_irqs[i].mask) - handle_nested_irq(wm831x->irq_base + i); + handle_nested_irq(irq_find_mapping(wm831x->irq_domain, + i)); /* Simulate an edge triggered IRQ by polling the input * status. This is sucky but improves interoperability. */ if (primary == WM831X_GP_INT && - wm831x->gpio_level[i - WM831X_IRQ_GPIO_1]) { + wm831x->gpio_level_high[i - WM831X_IRQ_GPIO_1]) { ret = wm831x_reg_read(wm831x, WM831X_GPIO_LEVEL); while (ret & 1 << (i - WM831X_IRQ_GPIO_1)) { - handle_nested_irq(wm831x->irq_base + i); + handle_nested_irq(irq_find_mapping(wm831x->irq_domain, + i)); + ret = wm831x_reg_read(wm831x, + WM831X_GPIO_LEVEL); + } + } + + if (primary == WM831X_GP_INT && + wm831x->gpio_level_low[i - WM831X_IRQ_GPIO_1]) { + ret = wm831x_reg_read(wm831x, WM831X_GPIO_LEVEL); + while (!(ret & 1 << (i - WM831X_IRQ_GPIO_1))) { + handle_nested_irq(irq_find_mapping(wm831x->irq_domain, + i)); ret = wm831x_reg_read(wm831x, WM831X_GPIO_LEVEL); } @@ -527,10 +546,34 @@ out: return IRQ_HANDLED; } +static int wm831x_irq_map(struct irq_domain *h, unsigned int virq, + irq_hw_number_t hw) +{ + irq_set_chip_data(virq, h->host_data); + irq_set_chip_and_handler(virq, &wm831x_irq_chip, handle_edge_irq); + irq_set_nested_thread(virq, 1); + + /* ARM needs us to explicitly flag the IRQ as valid + * and will set them noprobe when we do so. */ +#ifdef CONFIG_ARM + set_irq_flags(virq, IRQF_VALID); +#else + irq_set_noprobe(virq); +#endif + + return 0; +} + +static struct irq_domain_ops wm831x_irq_domain_ops = { + .map = wm831x_irq_map, + .xlate = irq_domain_xlate_twocell, +}; + int wm831x_irq_init(struct wm831x *wm831x, int irq) { struct wm831x_pdata *pdata = wm831x->dev->platform_data; - int i, cur_irq, ret; + struct irq_domain *domain; + int i, ret, irq_base; mutex_init(&wm831x->irq_lock); @@ -543,18 +586,33 @@ int wm831x_irq_init(struct wm831x *wm831x, int irq) } /* Try to dynamically allocate IRQs if no base is specified */ - if (!pdata || !pdata->irq_base) - wm831x->irq_base = -1; + if (pdata && pdata->irq_base) { + irq_base = irq_alloc_descs(pdata->irq_base, 0, + WM831X_NUM_IRQS, 0); + if (irq_base < 0) { + dev_warn(wm831x->dev, "Failed to allocate IRQs: %d\n", + irq_base); + irq_base = 0; + } + } else { + irq_base = 0; + } + + if (irq_base) + domain = irq_domain_add_legacy(wm831x->dev->of_node, + ARRAY_SIZE(wm831x_irqs), + irq_base, 0, + &wm831x_irq_domain_ops, + wm831x); else - wm831x->irq_base = pdata->irq_base; + domain = irq_domain_add_linear(wm831x->dev->of_node, + ARRAY_SIZE(wm831x_irqs), + &wm831x_irq_domain_ops, + wm831x); - wm831x->irq_base = irq_alloc_descs(wm831x->irq_base, 0, - WM831X_NUM_IRQS, 0); - if (wm831x->irq_base < 0) { - dev_warn(wm831x->dev, "Failed to allocate IRQs: %d\n", - wm831x->irq_base); - wm831x->irq_base = 0; - return 0; + if (!domain) { + dev_warn(wm831x->dev, "Failed to allocate IRQ domain\n"); + return -EINVAL; } if (pdata && pdata->irq_cmos) @@ -565,38 +623,22 @@ int wm831x_irq_init(struct wm831x *wm831x, int irq) wm831x_set_bits(wm831x, WM831X_IRQ_CONFIG, WM831X_IRQ_OD, i); - /* Try to flag /IRQ as a wake source; there are a number of - * unconditional wake sources in the PMIC so this isn't - * conditional but we don't actually care *too* much if it - * fails. - */ - ret = enable_irq_wake(irq); - if (ret != 0) { - dev_warn(wm831x->dev, "Can't enable IRQ as wake source: %d\n", - ret); - } - wm831x->irq = irq; - - /* Register them with genirq */ - for (cur_irq = wm831x->irq_base; - cur_irq < ARRAY_SIZE(wm831x_irqs) + wm831x->irq_base; - cur_irq++) { - irq_set_chip_data(cur_irq, wm831x); - irq_set_chip_and_handler(cur_irq, &wm831x_irq_chip, - handle_edge_irq); - irq_set_nested_thread(cur_irq, 1); - - /* ARM needs us to explicitly flag the IRQ as valid - * and will set them noprobe when we do so. */ -#ifdef CONFIG_ARM - set_irq_flags(cur_irq, IRQF_VALID); -#else - irq_set_noprobe(cur_irq); -#endif - } + wm831x->irq_domain = domain; if (irq) { + /* Try to flag /IRQ as a wake source; there are a number of + * unconditional wake sources in the PMIC so this isn't + * conditional but we don't actually care *too* much if it + * fails. + */ + ret = enable_irq_wake(irq); + if (ret != 0) { + dev_warn(wm831x->dev, + "Can't enable IRQ as wake source: %d\n", + ret); + } + ret = request_threaded_irq(irq, NULL, wm831x_irq_thread, IRQF_TRIGGER_LOW | IRQF_ONESHOT, "wm831x", wm831x); |