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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2020-04-15 17:15:22 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2020-04-17 12:30:05 +0200 |
| commit | 038aa1f0aba9596639c8ec2057169fa8e77d60d1 (patch) | |
| tree | ce77cdc7337194195a91e8542eb940d2ede1da6a /drivers/gpio/gpio-dwapb.c | |
| parent | c58220cba2e03618659fa7d5dfae31f5ad4ae9d0 (diff) | |
| download | linux-stable-038aa1f0aba9596639c8ec2057169fa8e77d60d1.tar.gz linux-stable-038aa1f0aba9596639c8ec2057169fa8e77d60d1.tar.bz2 linux-stable-038aa1f0aba9596639c8ec2057169fa8e77d60d1.zip | |
gpio: dwapb: Refactor IRQ handler to use bit operations
Refactor IRQ handler in order to use for_each_set_bit() helper.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20200415141534.31240-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-dwapb.c')
| -rw-r--r-- | drivers/gpio/gpio-dwapb.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c index c1b6d4f7307e..e89a3c6877aa 100644 --- a/drivers/gpio/gpio-dwapb.c +++ b/drivers/gpio/gpio-dwapb.c @@ -193,22 +193,21 @@ static void dwapb_toggle_trigger(struct dwapb_gpio *gpio, unsigned int offs) static u32 dwapb_do_irq(struct dwapb_gpio *gpio) { - u32 irq_status = dwapb_read(gpio, GPIO_INTSTATUS); - u32 ret = irq_status; + unsigned long irq_status; + int hwirq; - while (irq_status) { - int hwirq = fls(irq_status) - 1; + irq_status = dwapb_read(gpio, GPIO_INTSTATUS); + for_each_set_bit(hwirq, &irq_status, 32) { int gpio_irq = irq_find_mapping(gpio->domain, hwirq); + u32 irq_type = irq_get_trigger_type(gpio_irq); generic_handle_irq(gpio_irq); - irq_status &= ~BIT(hwirq); - if ((irq_get_trigger_type(gpio_irq) & IRQ_TYPE_SENSE_MASK) - == IRQ_TYPE_EDGE_BOTH) + if ((irq_type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) dwapb_toggle_trigger(gpio, hwirq); } - return ret; + return irq_status; } static void dwapb_irq_handler(struct irq_desc *desc) |