29 lines
1.0 KiB
Diff
29 lines
1.0 KiB
Diff
From 12de4b5e7cbcd193d5abb753ca511fe8f2236846 Mon Sep 17 00:00:00 2001
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From: Pawel Dembicki <paweldembicki@gmail.com>
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Date: Fri, 13 Nov 2020 07:30:03 +0100
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Subject: [PATCH 1/1] gpio-pca953x: hack: Allow to use falling trigger
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Gpio-mpc8xxx driver of Layerscape gpio support only edge interrupts.
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Gpio-pca953x allow only low state trigger. This hack fix the problem.
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Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
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---
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--- a/drivers/gpio/gpio-pca953x.c
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+++ b/drivers/gpio/gpio-pca953x.c
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@@ -881,10 +881,12 @@ static int pca953x_irq_setup(struct pca9
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for (i = 0; i < NBANK(chip); i++)
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chip->irq_stat[i] &= reg_direction[i];
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mutex_init(&chip->irq_lock);
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-
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+ /* gpio-mpc8xxx driver of Layerscape gpio support only edge interrupts.
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+ * This hack fix the problem.
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+ */
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ret = devm_request_threaded_irq(&client->dev, client->irq,
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NULL, pca953x_irq_handler,
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- IRQF_TRIGGER_LOW | IRQF_ONESHOT |
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+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
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IRQF_SHARED,
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dev_name(&client->dev), chip);
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if (ret) {
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