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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2017-01-11 15:49:00 +0200
committerLinus Walleij <linus.walleij@linaro.org>2017-01-12 08:11:56 +0100
commit49c03096263871a68c9dea3e86b7d1e163d2fba8 (patch)
treec776451154ce6f57e1dd2a1cfc3f09cbd46cb62c /drivers/pinctrl/intel
parent04ff5a095d662e0879f0eb04b9247e092210aeff (diff)
downloadlinux-49c03096263871a68c9dea3e86b7d1e163d2fba8.tar.bz2
pinctrl: baytrail: Do not add all GPIOs to IRQ domain
When DIRECT_IRQ_EN is set, the pin is routed directly to the IO-APIC bypassing the GPIO driver completely. However, the mask register is still used to determine if the pin is supposed to generate IRQ or not. So with commit 3ae02c14d964 the IRQ core masks all IRQs (because of handle_bad_irq()) the pin connected to the touchscreen gets masked as well and hence no interrupts. To make this all work as expected we do not add those GPIOs to the IRQ domain that can actually propagate interrupts. Fixes: 3ae02c14d964 ("pinctrl: intel: set default handler to be handle_bad_irq()") Reported-by: Robert R. Howell <rhowell@uwyo.edu> Suggested-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/intel')
-rw-r--r--drivers/pinctrl/intel/pinctrl-baytrail.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/pinctrl/intel/pinctrl-baytrail.c b/drivers/pinctrl/intel/pinctrl-baytrail.c
index 67e92699b84e..c123488266ce 100644
--- a/drivers/pinctrl/intel/pinctrl-baytrail.c
+++ b/drivers/pinctrl/intel/pinctrl-baytrail.c
@@ -1623,6 +1623,8 @@ static void byt_gpio_irq_handler(struct irq_desc *desc)
static void byt_gpio_irq_init_hw(struct byt_gpio *vg)
{
+ struct gpio_chip *gc = &vg->chip;
+ struct device *dev = &vg->pdev->dev;
void __iomem *reg;
u32 base, value;
int i;
@@ -1644,10 +1646,12 @@ static void byt_gpio_irq_init_hw(struct byt_gpio *vg)
}
value = readl(reg);
- if ((value & BYT_PIN_MUX) == byt_get_gpio_mux(vg, i) &&
- !(value & BYT_DIRECT_IRQ_EN)) {
+ if (value & BYT_DIRECT_IRQ_EN) {
+ clear_bit(i, gc->irq_valid_mask);
+ dev_dbg(dev, "excluding GPIO %d from IRQ domain\n", i);
+ } else if ((value & BYT_PIN_MUX) == byt_get_gpio_mux(vg, i)) {
byt_gpio_clear_triggering(vg, i);
- dev_dbg(&vg->pdev->dev, "disabling GPIO %d\n", i);
+ dev_dbg(dev, "disabling GPIO %d\n", i);
}
}
@@ -1686,6 +1690,7 @@ static int byt_gpio_probe(struct byt_gpio *vg)
gc->can_sleep = false;
gc->parent = &vg->pdev->dev;
gc->ngpio = vg->soc_data->npins;
+ gc->irq_need_valid_mask = true;
#ifdef CONFIG_PM_SLEEP
vg->saved_context = devm_kcalloc(&vg->pdev->dev, gc->ngpio,