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path: root/drivers/gpio/gpio-omap.c
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Diffstat (limited to 'drivers/gpio/gpio-omap.c')
-rw-r--r--drivers/gpio/gpio-omap.c84
1 files changed, 43 insertions, 41 deletions
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 5236db161..f7fbb46d5 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -51,7 +51,7 @@ struct gpio_regs {
struct gpio_bank {
struct list_head node;
void __iomem *base;
- u16 irq;
+ int irq;
u32 non_wakeup_gpios;
u32 enabled_non_wakeup_gpios;
struct gpio_regs context;
@@ -59,6 +59,7 @@ struct gpio_bank {
u32 level_mask;
u32 toggle_mask;
raw_spinlock_t lock;
+ raw_spinlock_t wa_lock;
struct gpio_chip chip;
struct clk *dbck;
u32 mod_usage;
@@ -496,9 +497,6 @@ static int omap_gpio_irq_type(struct irq_data *d, unsigned type)
(type & (IRQ_TYPE_LEVEL_LOW|IRQ_TYPE_LEVEL_HIGH)))
return -EINVAL;
- if (!BANK_USED(bank))
- pm_runtime_get_sync(bank->dev);
-
raw_spin_lock_irqsave(&bank->lock, flags);
retval = omap_set_gpio_triggering(bank, offset, type);
if (retval) {
@@ -521,8 +519,6 @@ static int omap_gpio_irq_type(struct irq_data *d, unsigned type)
return 0;
error:
- if (!BANK_USED(bank))
- pm_runtime_put(bank->dev);
return retval;
}
@@ -654,8 +650,13 @@ static int omap_gpio_wake_enable(struct irq_data *d, unsigned int enable)
{
struct gpio_bank *bank = omap_irq_data_get_bank(d);
unsigned offset = d->hwirq;
+ int ret;
+
+ ret = omap_set_gpio_wakeup(bank, offset, enable);
+ if (!ret)
+ ret = irq_set_irq_wake(bank->irq, enable);
- return omap_set_gpio_wakeup(bank, offset, enable);
+ return ret;
}
static int omap_gpio_request(struct gpio_chip *chip, unsigned offset)
@@ -709,26 +710,21 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
* line's interrupt handler has been run, we may miss some nested
* interrupts.
*/
-static void omap_gpio_irq_handler(struct irq_desc *desc)
+static irqreturn_t omap_gpio_irq_handler(int irq, void *gpiobank)
{
void __iomem *isr_reg = NULL;
u32 isr;
unsigned int bit;
- struct gpio_bank *bank;
- int unmasked = 0;
- struct irq_chip *irqchip = irq_desc_get_chip(desc);
- struct gpio_chip *chip = irq_desc_get_handler_data(desc);
+ struct gpio_bank *bank = gpiobank;
+ unsigned long wa_lock_flags;
unsigned long lock_flags;
- chained_irq_enter(irqchip, desc);
-
- bank = container_of(chip, struct gpio_bank, chip);
isr_reg = bank->base + bank->regs->irqstatus;
- pm_runtime_get_sync(bank->dev);
-
if (WARN_ON(!isr_reg))
goto exit;
+ pm_runtime_get_sync(bank->dev);
+
while (1) {
u32 isr_saved, level_mask = 0;
u32 enabled;
@@ -750,13 +746,6 @@ static void omap_gpio_irq_handler(struct irq_desc *desc)
raw_spin_unlock_irqrestore(&bank->lock, lock_flags);
- /* 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(irqchip, desc);
- }
-
if (!isr)
break;
@@ -777,18 +766,18 @@ static void omap_gpio_irq_handler(struct irq_desc *desc)
raw_spin_unlock_irqrestore(&bank->lock, lock_flags);
+ raw_spin_lock_irqsave(&bank->wa_lock, wa_lock_flags);
+
generic_handle_irq(irq_find_mapping(bank->chip.irqdomain,
bit));
+
+ raw_spin_unlock_irqrestore(&bank->wa_lock,
+ wa_lock_flags);
}
}
- /* 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(irqchip, desc);
pm_runtime_put(bank->dev);
+ return IRQ_HANDLED;
}
static unsigned int omap_gpio_irq_startup(struct irq_data *d)
@@ -797,9 +786,6 @@ static unsigned int omap_gpio_irq_startup(struct irq_data *d)
unsigned long flags;
unsigned offset = d->hwirq;
- if (!BANK_USED(bank))
- pm_runtime_get_sync(bank->dev);
-
raw_spin_lock_irqsave(&bank->lock, flags);
if (!LINE_USED(bank->mod_usage, offset))
@@ -815,8 +801,6 @@ static unsigned int omap_gpio_irq_startup(struct irq_data *d)
return 0;
err:
raw_spin_unlock_irqrestore(&bank->lock, flags);
- if (!BANK_USED(bank))
- pm_runtime_put(bank->dev);
return -EINVAL;
}
@@ -835,6 +819,19 @@ static void omap_gpio_irq_shutdown(struct irq_data *d)
omap_clear_gpio_debounce(bank, offset);
omap_disable_gpio_module(bank, offset);
raw_spin_unlock_irqrestore(&bank->lock, flags);
+}
+
+static void omap_gpio_irq_bus_lock(struct irq_data *data)
+{
+ struct gpio_bank *bank = omap_irq_data_get_bank(data);
+
+ if (!BANK_USED(bank))
+ pm_runtime_get_sync(bank->dev);
+}
+
+static void gpio_irq_bus_sync_unlock(struct irq_data *data)
+{
+ struct gpio_bank *bank = omap_irq_data_get_bank(data);
/*
* If this is the last IRQ to be freed in the bank,
@@ -1125,14 +1122,12 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
/* MPUIO is a bit different, reading IRQ status clears it */
if (bank->is_mpuio) {
irqc->irq_ack = dummy_irq_chip.irq_ack;
- irqc->irq_mask = irq_gc_mask_set_bit;
- irqc->irq_unmask = irq_gc_mask_clr_bit;
if (!bank->regs->wkup_en)
irqc->irq_set_wake = NULL;
}
ret = gpiochip_irqchip_add(&bank->chip, irqc,
- irq_base, omap_gpio_irq_handler,
+ irq_base, handle_bad_irq,
IRQ_TYPE_NONE);
if (ret) {
@@ -1141,10 +1136,14 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
return -ENODEV;
}
- gpiochip_set_chained_irqchip(&bank->chip, irqc,
- bank->irq, omap_gpio_irq_handler);
+ gpiochip_set_chained_irqchip(&bank->chip, irqc, bank->irq, NULL);
- return 0;
+ ret = devm_request_irq(bank->dev, bank->irq, omap_gpio_irq_handler,
+ 0, dev_name(bank->dev), bank);
+ if (ret)
+ gpiochip_remove(&bank->chip);
+
+ return ret;
}
static const struct of_device_id omap_gpio_match[];
@@ -1183,6 +1182,8 @@ static int omap_gpio_probe(struct platform_device *pdev)
irqc->irq_unmask = omap_gpio_unmask_irq,
irqc->irq_set_type = omap_gpio_irq_type,
irqc->irq_set_wake = omap_gpio_wake_enable,
+ irqc->irq_bus_lock = omap_gpio_irq_bus_lock,
+ irqc->irq_bus_sync_unlock = gpio_irq_bus_sync_unlock,
irqc->name = dev_name(&pdev->dev);
bank->irq = platform_get_irq(pdev, 0);
@@ -1224,6 +1225,7 @@ static int omap_gpio_probe(struct platform_device *pdev)
bank->set_dataout = omap_set_gpio_dataout_mask;
raw_spin_lock_init(&bank->lock);
+ raw_spin_lock_init(&bank->wa_lock);
/* Static mapping, never released */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-21 21:06:31 +0000