diff options
| author | Alek Du <alek.du@intel.com> | 2009-12-01 13:17:45 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-01 16:32:19 -0800 |
| commit | ca0297015d4f117005718e01aa368875abcccbc5 (patch) | |
| tree | 8a2702f6b45851eaaa3ddc41f5588e89c1524025 /drivers | |
| parent | 974348435c6d7b65fd6d8857b4809b0ff208d323 (diff) | |
| download | linux-ca0297015d4f117005718e01aa368875abcccbc5.tar.gz | |
gpio: Langwell GPIO driver bugfixes
- Remove wrong and unnecessary unmask operation - Remove extra GEDR reading This fixes the loss of interrupts which occurs when two or more pins are triggered in close succession. Signed-off-by: Alek Du <alek.du@intel.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/langwell_gpio.c | 11 |
1 files changed, 1 insertions, 10 deletions
diff --git a/drivers/gpio/langwell_gpio.c b/drivers/gpio/langwell_gpio.c index 5711ce5353c6..4baf3d7d0f8e 100644 --- a/drivers/gpio/langwell_gpio.c +++ b/drivers/gpio/langwell_gpio.c @@ -144,13 +144,6 @@ static int lnw_irq_type(unsigned irq, unsigned type) static void lnw_irq_unmask(unsigned irq) { - struct lnw_gpio *lnw = get_irq_chip_data(irq); - u32 gpio = irq - lnw->irq_base; - u8 reg = gpio / 32; - void __iomem *gedr; - - gedr = (void __iomem *)(&lnw->reg_base->GEDR[reg]); - writel(BIT(gpio % 32), gedr); }; static void lnw_irq_mask(unsigned irq) @@ -183,13 +176,11 @@ static void lnw_irq_handler(unsigned irq, struct irq_desc *desc) gedr_v = readl(gedr); if (!gedr_v) continue; - for (gpio = reg*32; gpio < reg*32+32; gpio++) { - gedr_v = readl(gedr); + for (gpio = reg*32; gpio < reg*32+32; gpio++) if (gedr_v & BIT(gpio % 32)) { pr_debug("pin %d triggered\n", gpio); generic_handle_irq(lnw->irq_base + gpio); } - } /* clear the edge detect status bit */ writel(gedr_v, gedr); } |