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pinctrl: baytrail: Enable glitch filter for GPIOs used as interrupts
On some systems, some PCB traces attached to GpioInts are routed in such a way that they pick up enough interference to constantly (many times per second) trigger. Enabling glitch-filtering fixes this. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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1 changed files with 6 additions and 0 deletions
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@ -46,6 +46,9 @@
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#define BYT_TRIG_POS BIT(25)
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#define BYT_TRIG_LVL BIT(24)
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#define BYT_DEBOUNCE_EN BIT(20)
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#define BYT_GLITCH_FILTER_EN BIT(19)
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#define BYT_GLITCH_F_SLOW_CLK BIT(17)
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#define BYT_GLITCH_F_FAST_CLK BIT(16)
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#define BYT_PULL_STR_SHIFT 9
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#define BYT_PULL_STR_MASK (3 << BYT_PULL_STR_SHIFT)
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#define BYT_PULL_STR_2K (0 << BYT_PULL_STR_SHIFT)
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@ -1579,6 +1582,9 @@ static int byt_irq_type(struct irq_data *d, unsigned int type)
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*/
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value &= ~(BYT_DIRECT_IRQ_EN | BYT_TRIG_POS | BYT_TRIG_NEG |
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BYT_TRIG_LVL);
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/* Enable glitch filtering */
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value |= BYT_GLITCH_FILTER_EN | BYT_GLITCH_F_SLOW_CLK |
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BYT_GLITCH_F_FAST_CLK;
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writel(value, reg);
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